Sammamish Weather in January

The climate in Sammamish during January can be summarized as cool and wet.

January is in the winter in Sammamish and is typically the coldest month of the year. Daytime maximum temperatures average around a cold 7°C (44°F), whilst at night 1°C (34°F) is normal.

On average January is the 2nd wettest month of the year in Sammamish with around 180mm 7.1 inches of rain making it a wet time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.

On the flip side this corresponds to an average of 2.5 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Sammamish in January 2024.