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{{languages}}
{{languages|Weather}}
{{VersionNotice|2.9.9.17 (14)}}
{{header|The Game World|Weather|version=Version 40|incver=43}}
[[File:Weather-fog rain.png|right]]
Project Zomboid uses a realistic climate system, based off Kentucky’s humid subtropical climate. There are four distinct seasons, with substantial variations between the summer and winter. Some winters can see extremely low temperatures with large amounts of snowfall, whilst summers may be scorchers, however the degree of this can vary with each new season.


[[File:Weather UI.png|200px|thumb|right|The empty black box above the Quest manager shows the current weather]]
==Weather fronts==
 
The weather is heavily defined by weather fronts, which can be either cold (low airmass) or warm (high airmass), each of which will be accompanied with its own weather conditions. The intensity of the weather conditions is governed by the strength of the previous front, and the strength of the current front. So, if the previous front was a strong warm front, and the current is a cold front, there will be greater chance of a tropical storm occurring. Each front can last a few days up to several weeks.  
Weather effects the temperature of the game world and survivors may have to adapt to weather accordingly. Currently, weather has little effect on zombies other than rain causing slight noise.  When the game loads, the max and minimum tempurature, the type of weather (but not its details), and the current moon phase are loaded from the save. The moon phase is immediately recalculated to make sure it is accurate.
 
Every 10 minutes the weather, moon phase, lighting, and tempurature get checked and if required updated.
 
{{Notice|Outdated}}


==Weather==
==Weather==
Weather is updated every 10 minutes. All weather lasts for 4 hours, with the exception of Rain, which may end abrutely at any time, but will still never last more than 4 hours. There are four types of weather currently: [[Rain|Rainy]], [[Sunny]], Normal, and [[Cloudy]].
There are several weather types within Project Zomboid, all of which are determined by the current weather front. The player can experience, cloudy, rainy, snowy, stormy, foggy, windy and sunny weather.
===Cloudy===
Clouds can vary in density, often having a great effect on the level of light. Widespread cloud cover is often associated with a warm front, reducing the level of light. Thick clouds can often occur during a cold front, plunging the world into darkness for a brief period. The current cloud cover can be seen as shadows on the ground, or even as reflections in vehicle windows.
===Rain and snow===
[[File:Weather-snow.png|thumb|right]]
Rain, also referred to as precipitation, can come in several forms, from light showers to heavy rainfall. Light showers often occur after a warm front has passed, since this will usually result in widespread cloudiness. Heavy rainfall is often associated with a cold front; however, this can also occur during a warm front. If the temperature is cold enough, snowfall will even occur rather than rainfall. During snowfall, the ground, trees and other surfaces will gradually become covered in snow.
If the player is caught in the rain or snow, they will become [[Moodles#Wet|wet]], increasing in severity depending on the level of rainfall and time spent in the rain. Staying wet will cause the player to feel [[Moodles#Hypothermia|colder]] and may eventually catch a [[Moodles#Has a Cold|cold]], causing them to involuntarily cough and sneeze. The rain can be blocked by having an umbrella equipped, keeping the player dry.
===Thunder clouds and tropical storms===
Thunder clouds may form during a cold front, with the intensity varying with the level of airmass. A colder front (lower airmass) moving into a warmer body (higher airmass) will have a greater chance of producing thunder or even a tropical storm, in which has a lot more wind power, thick clouds and darkness.
On multiplayer servers, a rumble of thunder can be heard, even if it’s clear sunny skies. This is the result of a player being banned from the server.
===Fog===
Fog, like light showers and widespread cloudiness, is often formed during a warm front. However, fog can also appear during cold mornings, which will usually result in a clear sunny day. Fog can severely affect the player’s visibility, making it somewhat dangerous to scavenge during a foggy day. Fog, like rain, can only be seen outdoors, making it safer to stay indoors when it’s foggy.
===Sunny===
Sunny days are caused by the absence of clouds, often being the result of a cold front. Clear skies are often accompanied with higher temperatures, increasing the player’s risk of getting [[Moodles#Hyperthermia|sunstroke]]. The intensity of a sunny day can be determined by the intensity of the reddish hue when outside.
===Wind===
[[File:Weather-UI.png|160px|thumb|right]]
Wind can be observed during any time of the year via the weather effects, movement of foliage or even the cloud movement direction. In the winter months, [[Moodles#Windchill|windchill]] becomes a major effect on the player when outdoors. Windchill will cause the player to feel colder than the actual air temperature, as is displayed on a [[Digital Watch|digital watch]]. [[Clothing]] type can reduce the amount of windchill experienced by the player.


Weather is choosen randomly by picking a number between 1 and 100 and comparing it to a weather table for each month.  Whatever weather is randomly choosen becomes the current weather, unless the weather choosen is Rain or Sunny.  If the weather is Sunny, there is a check done to determine if it is night time.  If it is night time, then the Sunny weather just becomes normal weather as it can't be Sunny at night time. If the weather selected is Rain, then a check is done against the sandbox's rain settings.
==Temperature==
 
The temperature within Project Zomboid can vary greatly depending on the current season. Temperature is influenced by several factors, including the season, the time of day, wind strength, and airmass, in which determines the weather front. Each day has a maximum and minimum temperature, the temperature will increase until it hits the maximum temperature for the day, at which point it will begin to fall until it reaches the minimum temperature.
If the rain level in the Sandbox settings is set to Very Dry, then there is a 100% chance that the game will change the newly selected Rain weather to Normal weather.  If the rain level settings in Sandbox are Dry then the chance is instead 50% that Rain will be changed to Normal.
{{clear|right}}
 
==Seasons==
If anything other than Rain or Sunny is selected, then another check is performed against the Sandbox settings. If the Sandbox settings are Rainy, then there is a 50% chance that the randomly choosen weather will instead become Rain.  If the Sandbox settings are Very Rainy, this chance is instead 100%.
There are four distinct seasons: summer, winter, autumn and spring. Each season has its own unique weather and temperature traits.
 
===Summer===
The selected weather, along with the season, determines the minimum and maximum tempurature for the day. It also determines the distance that the player character can see.
''June - August''<br>
 
Summer is typically the hottest season, able to reach temperatures up to and beyond 40°C (104°F). Although the typical summer will see very little rainfall, scattered clouds and daytime temperatures averaging 30°C (86°F). However, each summer can be very different from the last, with some seeing lower temperatures and more rainfall. Daylight in the summer is the longest of the seasons.
If anything other than Rain was choosen as the weather and it was raining, the rain obviously stops.  If it has already rained once that day, the chances of it raining again are significantly lower.  If Rain was choosen as the current weather and it has already Rain at least once today it randomly determines whether or not it will Rain again. The chance for it to rain again is (1/((how many times it has rained * 5)-1).  So if it has already rained once today, there is a 3/4 chance that it will not rain again, or if it has already rained twice today, there is a 8/9 chance that it will not rain again. If the game decides that it will not rain again, but Rain had been selected, it becomes Cloudy instead.
===Autumn===
 
''September - November''<br>
===Rain===
Autumn generally has the most extreme weather, having a higher chance of generating tropical storms in the earlier months. Plant life will lose their leaves during these months and may even see snow during the later months. Farming will have a very low yield during autumn.
While it is raining, the intensity of the rain can vary considerably.  Rain intensity ranges 0 to 34. When it first begins to rain a minimum and maximum intensity is randomly selected. The minimum intensity is randomly selected from a range of 0 to 4. The maximum intensity is randomly selected from a range of 9 to 34.
===Winter===
 
''December - February''<br>
Every hour there is a random chance that the rain will stop. By default this is a 20% chance, but the rain settings in Sandbox can change this chance.
Winter is the coldest season, with temperatures often getting into the negatives and down to -30°C (-22°F). Snowfall is most likely to occur during the winter, creating snowfields and covering surfaces and plant life in snow. Farming will no longer be possible during these months. Daylight in the winter is the lowest of the seasons.
 
===Spring===
{|class="wikitable"
''March - May''<br>
!Sandbox Setting!!Random Abrute Rain Chance
Spring is the most average season, seeing a bit of rainfall, chance of storms and the most likely to see fog. This season is abundant with wildlife, with foraging and farming yielding plenty of food and resources.
|-
|Very Dry||100%
|-
|Dry||50%
|-
|Default||20%
|-
|Rainy||11%
|-
|Very Rainy||7%
|}


==Moon Cycle==
==Moon Cycle==
{{Outdated}}{{Unverified}}
The moon cycle is based on a 30 day cycle.  There are 8 different moon phases.  Each moon phase provides a different amount of ambient light during the night time.  Ranging from 0.0 (New Moon) to 0.7 (Full Moon).
The moon cycle is based on a 30 day cycle.  There are 8 different moon phases.  Each moon phase provides a different amount of ambient light during the night time.  Ranging from 0.0 (New Moon) to 0.7 (Full Moon).


The moon progresses as follows:
The moon progresses as follows:
{|class="wikitable"
{|class="pztable"
!Day!!Moon Phase ID!!Ambient Light
!Day!!Moon Phase ID!!Ambient Light
|-
|-
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|}
|}


==Temperature==
==See also==
Every day there is a minimum and maximum temperature.  These are determined by the month and the current weather.  The temperature will go up a little bit at a time until it hits the maximum temperature for the day, at which point it will begin to fall until it reaches the minimum temperature.
*[[Erosion]]
 
==Effects on your character==
The in-game weather, which is mentioned above, is having a certain effect on your character. The combination of the temperature outside and the clothes your character is wearing, can lead to [[Moodles#Hyperthermia|Hyperthermia]] and [[Moodles#Hypothermia|Hypothermia]]. The effects of hyperthermia or hypothermia can be avoided by changing clothes accordingly.
Rain can have a serious effect on your character, if not taken seriously. When your character stays out in the rain, he/she will get [[Moodles#Wet|wet]]. At this point, there is no way to avoid getting wet when you are outside and it is raining. Your speed then decreases the more wet you get. Once you become soaking, you have the chance of becoming [[Moodles#Cold|sick]] and it is increased when becoming drenched. However, your character will get dryer when he stays inside again. Drying yourself with a [[Dish_Towel|Dish Towel]] or a [[Bath_Towel|Bath Towel]] will instantly dry your character.
 
 
[[Category: The Game World]]
[[Category: Weather]]

Revision as of 23:10, 12 July 2020

Weather-fog rain.png

Project Zomboid uses a realistic climate system, based off Kentucky’s humid subtropical climate. There are four distinct seasons, with substantial variations between the summer and winter. Some winters can see extremely low temperatures with large amounts of snowfall, whilst summers may be scorchers, however the degree of this can vary with each new season.

Weather fronts

The weather is heavily defined by weather fronts, which can be either cold (low airmass) or warm (high airmass), each of which will be accompanied with its own weather conditions. The intensity of the weather conditions is governed by the strength of the previous front, and the strength of the current front. So, if the previous front was a strong warm front, and the current is a cold front, there will be greater chance of a tropical storm occurring. Each front can last a few days up to several weeks.

Weather

There are several weather types within Project Zomboid, all of which are determined by the current weather front. The player can experience, cloudy, rainy, snowy, stormy, foggy, windy and sunny weather.

Cloudy

Clouds can vary in density, often having a great effect on the level of light. Widespread cloud cover is often associated with a warm front, reducing the level of light. Thick clouds can often occur during a cold front, plunging the world into darkness for a brief period. The current cloud cover can be seen as shadows on the ground, or even as reflections in vehicle windows.

Rain and snow

Weather-snow.png

Rain, also referred to as precipitation, can come in several forms, from light showers to heavy rainfall. Light showers often occur after a warm front has passed, since this will usually result in widespread cloudiness. Heavy rainfall is often associated with a cold front; however, this can also occur during a warm front. If the temperature is cold enough, snowfall will even occur rather than rainfall. During snowfall, the ground, trees and other surfaces will gradually become covered in snow. If the player is caught in the rain or snow, they will become wet, increasing in severity depending on the level of rainfall and time spent in the rain. Staying wet will cause the player to feel colder and may eventually catch a cold, causing them to involuntarily cough and sneeze. The rain can be blocked by having an umbrella equipped, keeping the player dry.

Thunder clouds and tropical storms

Thunder clouds may form during a cold front, with the intensity varying with the level of airmass. A colder front (lower airmass) moving into a warmer body (higher airmass) will have a greater chance of producing thunder or even a tropical storm, in which has a lot more wind power, thick clouds and darkness. On multiplayer servers, a rumble of thunder can be heard, even if it’s clear sunny skies. This is the result of a player being banned from the server.

Fog

Fog, like light showers and widespread cloudiness, is often formed during a warm front. However, fog can also appear during cold mornings, which will usually result in a clear sunny day. Fog can severely affect the player’s visibility, making it somewhat dangerous to scavenge during a foggy day. Fog, like rain, can only be seen outdoors, making it safer to stay indoors when it’s foggy.

Sunny

Sunny days are caused by the absence of clouds, often being the result of a cold front. Clear skies are often accompanied with higher temperatures, increasing the player’s risk of getting sunstroke. The intensity of a sunny day can be determined by the intensity of the reddish hue when outside.

Wind

Weather-UI.png

Wind can be observed during any time of the year via the weather effects, movement of foliage or even the cloud movement direction. In the winter months, windchill becomes a major effect on the player when outdoors. Windchill will cause the player to feel colder than the actual air temperature, as is displayed on a digital watch. Clothing type can reduce the amount of windchill experienced by the player.

Temperature

The temperature within Project Zomboid can vary greatly depending on the current season. Temperature is influenced by several factors, including the season, the time of day, wind strength, and airmass, in which determines the weather front. Each day has a maximum and minimum temperature, the temperature will increase until it hits the maximum temperature for the day, at which point it will begin to fall until it reaches the minimum temperature.

Seasons

There are four distinct seasons: summer, winter, autumn and spring. Each season has its own unique weather and temperature traits.

Summer

June - August
Summer is typically the hottest season, able to reach temperatures up to and beyond 40°C (104°F). Although the typical summer will see very little rainfall, scattered clouds and daytime temperatures averaging 30°C (86°F). However, each summer can be very different from the last, with some seeing lower temperatures and more rainfall. Daylight in the summer is the longest of the seasons.

Autumn

September - November
Autumn generally has the most extreme weather, having a higher chance of generating tropical storms in the earlier months. Plant life will lose their leaves during these months and may even see snow during the later months. Farming will have a very low yield during autumn.

Winter

December - February
Winter is the coldest season, with temperatures often getting into the negatives and down to -30°C (-22°F). Snowfall is most likely to occur during the winter, creating snowfields and covering surfaces and plant life in snow. Farming will no longer be possible during these months. Daylight in the winter is the lowest of the seasons.

Spring

March - May
Spring is the most average season, seeing a bit of rainfall, chance of storms and the most likely to see fog. This season is abundant with wildlife, with foraging and farming yielding plenty of food and resources.

Moon Cycle

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The moon cycle is based on a 30 day cycle. There are 8 different moon phases. Each moon phase provides a different amount of ambient light during the night time. Ranging from 0.0 (New Moon) to 0.7 (Full Moon).

The moon progresses as follows:

Day Moon Phase ID Ambient Light
1-4 0 0.0
5-8 1 0.2
9-12 2 0.4
13-15 3 0.5
16-18 4 0.7
19-22 5 0.5
23-26 6 0.4
27-30 7 0.2

See also