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- Abnormal: Cold Snap: Lowers temperature by -10° F (Between -10° and 30° Fahrenheit during the day, 10 to 20 degrees colder at night.), Calm winds (Wind speeds are light (0 to 10 mph)).
- Normal: Cold temperatures (Between 0° and 40° Fahrenheit during the day, 10 to 20 degrees colder at night.), Calm winds (Wind speeds are light (0 to 10 mph)).
- Inclement (Snow): Snow reduces visibility ranges by half, resulting in a -4 penalty on Spot and Search checks. It has the same effect on flames, ranged weapon attacks, and Listen checks as severe wind. And it costs 2 squares of movement to enter a snow-covered square. A day of snowfall leaves 1d6 inches of snow on the ground.
- Snowstorm: The combined effects of precipitation (or dust) and wind that accompany all storms reduce visibility ranges by three quarters, imposing a -8 penalty on Spot, Search, and Listen checks. Storms make ranged weapon attacks impossible, except for those using siege weapons, which have a -4 penalty on attack rolls. They automatically extinguish candles, torches, and similar unprotected flames. They cause protected flames, such as those of lanterns, to dance wildly and have a 50% chance to extinguish these lights. In addition, snowstorms leave 1d6 inches of snow on the ground afterward.
- Blizzard: Very high winds and torrential precipitation reduce visibility to zero, making Spot, Search, and Listen checks and all ranged weapon attacks impossible. Unprotected flames are automatically extinguished, and protected flames have a 75% chance of being doused. Creatures caught in the area must make a DC 20 Fortitude save or face the effects based on the size of the creature.