Falls Lake Weather Forecast
- 33
- 47
Rain
- 30
- 39
Rain/Snow
- 30
- 32
Snow
- 29
- 33
Rain/Snow
- 29
- 30
Snow
- 28
- 31
Snow
Today 15 Dec Cascades of Whatcom and Skagit Counties
Rain and snow until late Afternoon, then Showers, snow Showers and a slight chance of Thunderstorms late in the afternoon. Snow level near 8000 feet. Some Thunderstorms may produce heavy rainfall late in the afternoon. Precipitation may be heavy at Times. Rainfall Amounts one to three Inches Possible, except higher Amounts possible in Thunderstorms. No snow accumulation.
Tonight 15 Dec Cascades of Whatcom and Skagit Counties
Showers and a slight chance of Thunderstorms in the evening. Snow. Rain after midnight. Snow level near 4500 feet decreasing to 3000 feet after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Rainfall Amounts a half inch to one inch Possible, except higher Amounts possible in Thunderstorms. Snow accumulation up to 4 Inches.
Falls Lake Temperature Statistics
December Temperature
Arlington Municipal Airport (40.4 miles)
Lowest 1 December, 2025
30 °FAverage December
46.5 °FHighest 8 December, 2025
57 °F
Climate (2020–Present)
Arlington Municipal Airport (40.4 miles)
Average Low 2020–2025
42.5 °FAverage 2020–2025
50.7 °FAverage High 2020–2025
59.8 °F