天气

参见：地形。

与地形相对应，气候可以影响所有类型的陆军单位的移动和战斗。应该注意的是，各省份并不总是有气候变化，有些省份没有气温修正。

夜晚

夜晚会产生以下效果：

• 地面进攻-50%
• 对空探测-20%
• 海军命中率-25%
• 舰载载机无法行动，执行命令
• 轰炸目标-50%
• 撤退时的舰队速度+10%
• 密接空中支援伤害-90%

气候类型

气候可能会影响整个地区或是单个省份。

在地区

状态	组织度恢复	配置	对海探测	海军命中率	海军速度	撤退时的舰队速度	对海攻击	舰载机起降能力	对空探测	空军事故发生率	空军任务效率	地面轰炸效率
雨	−5%	–	−10%	−5%	−5%	+5%	−20%	–	−10%	+10%	−10%	–
暴雨	−20%	−10%	−20%	−20%	−10%	+10%	-40%	−80%	−20%	+30%	−30%	−50%
雪	−5%	-10%	−15%	−5%	−5%	+5%	−30%	–	−15%	+10%	−10%	–
暴风雪	−30%	-20%	−30%	−10%	−10%	+15%	-40%	−100%	−30%	+30%	−30%	−70%
沙尘暴	−50%	–	–	–	–	–	-90%	–	−90%	+60%	−50%	−100%

Carrier Traffic -100% means that no planes from a carrier can fly.

Province level

Temperature

Condition	Heat Attrition	Winter Attrition	Division Attack	Organization Regain	Entrenchment speed	Division speed	Fleet speed while retreating	Supply consumption	Lower Bound in Degrees	Upper Bound in Degrees
Extremely cold		+20%	−50%	−10%	−60%	-25%	+10%		-100	-25
Very cold		+10%	-40%	-5%	−30%	-25%	+10%		-25	-15
Very hot	+10%			-5%					27	32
Extremely hot	+20%		-10%	−10%				+50%	32	100

Note: Attrition from weather only applies if controller is at war.

While winter attrition can be reduced by appointing the armies to a commander with a  Winter Specialist trait, there is no corresponding trait to reduce heat attrition. Commanders gain the  Winter Specialist trait by fighting for a longer time in cold weather.

南非 has a unique focus Desert Equipment reducing heat attrition.

Ground conditions

Condition	Attrition	Divisions speed	Division Attack	Division Defence	Dig in Speed	Organization Regain	Naval Retreat Speed
Deep snow		−25%	−30%			−5%	+10%
Snow		−10%	−10%
Mud	+70%	−50%	−40%
Flooding		-50%		+50%	+20%

Very high snow will affect unit movement speed, but Mud is going to increase attrition levels a lot as well as slow the army down to a crawl. A smart player will try not to attack The Soviet Union just as mud season begins or they might find a lot of their panzer divisions bogged down.

If the area is set up as susceptible to mud that time of year and water levels over a time period is high enough mud develops. Either rain or melting snow can be the source of the water. The game logs how much rain has gone down in a special region. If the temperature is above 0, some of the stored water evaporates, the higher the temperature is, the higher the evaporation rate. If there is snow and the temperature is above 0, some snow will turn into water, the higher the temperature, the faster this conversion is. If there is mud (meaning there is a lot of water on the ground) and the temperature goes below 0, the mud disappears, because the water has frozen.

Terrain effects on weather

Some terrain makes it more or less likely for a weather effect to occur.

Weather	Mountain	Plains	Marsh	Desert	Urban
Mud	-10%	+50%	+80%	+50%
Snow and Blizzard	+80%			-100%	-40%
Sandstorm	-100%			+80%

机制 

事件与决议

事件 • 决议