Olo Mountain Weather Forecast
- 34
- 36
Snow
- 30
- 42
Rain/Snow
- 31
- 34
Snow
- 33
- 35
Snow
- 33
- 36
Snow
- 33
- 37
Snow
- 30
- 38
Snow Likely
Today 17 Dec Cascades of Snohomish and Northern King Counties
Breezy. A chance of rain late in the morning. Snow Showers and a slight chance of Thunderstorms through the day. Rain late in the afternoon. Snow level near 2000 feet. Some Thunderstorms may produce heavy rainfall. Snow may be heavy at Times. New snow accumulation of 3 to 6 Inches. Afternoon pass Temperatures in the upper 20s. West wind in the Passes around 25 Mph decreasing to 15 to 20 Mph in the afternoon. Gusts to 40 Mph.
Tonight 17 Dec Cascades of Snohomish and Northern King Counties
Rain and snow. Snow level near 2500 feet. Snow accumulation of 2 to 5 Inches. Lows in the upper 20s. West wind in the Passes around 10 Mph in the evening becoming light. Gusts to 25 Mph.
Olo Mountain Temperature Statistics
December Temperature
Arlington Municipal Airport (13.7 miles)
Lowest 1 December, 2025
30 °FAverage December
47.5 °FHighest 15 December, 2025
60.1 °F
Climate (2020–Present)
Arlington Municipal Airport (13.7 miles)
Average Low 2020–2025
42.5 °FAverage 2020–2025
50.7 °FAverage High 2020–2025
59.8 °F