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GM Screen
Mastering the Wild
/
Weather in the Wilderness
/
Weather Baseline
Season
Source
Ultimate Wilderness pg. 166
A year has four seasons—spring, summer, fall, and winter— each of which lasts about 3 months. Season plays an important part in dictating a region’s baseline temperature (as noted in each climate and in Table 4–14). It also dictates the baseline precipitation frequency in a region before applying adjustments due to climate or elevation. In most regions with cold and temperate climates, precipitation frequency is intermittent during spring and fall, common during the summer, and rare during the winter. In most regions with tropical climates, precipitation frequency is common during spring and fall, intermittent during the summer, and rare during the winter.
On worlds with a tilt in their axis, the seasons are typically reversed between northern and southern hemispheres. While it is the height of summer in the north, the areas south of the equator are in the depths of winter.
Table 4-14: Seasonal Baselines
Season
Cold or Temperate Climate Precip. Frequency
Tropical Climate Precip. Frequency
Spring
Intermittent
Common
Summer
Common
Intermittent
Fall
Intermittent
Common
Winter
Rare
Rare