Seattle, WA Climate in January

Temperature for January

In Seattle, WA during January the average high temperature is 46.2°F. The hottest day on record was January 21, 1981 when the temperature recorded was 64.0°F.

Seattle, WA daily average and extreme temperature range for January

Low Temperature

During January the overnight temperature drops to an average of 34.7°F, with the lowest temperature of 0.3°F being recorded on January 31, 1950. On average there are 3 days in January when the temperature stays below freezing all day. In the worst January there were 16 days when the temperature did not make it above freezing. Overnight temperatures drop below freezing between 1 and 29 times in January.

Precipitation for January

In January the average monthly rainfall in Seattle, WA is 5.77 inches with rain usually falling on between 18 and 19 days. 1985 was the driest January with only 0.61 inches of rain falling, and 1953 was the wettest January with 13.07 inches of rain. The wettest single day in January was 9 January 1990 when 2.66 inches of rain fell.

In January it usually snows on between 5 and 6 days. In January there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in January.