Olo Mountain Weather Forecast
- 37
- 52
Decreasing Clouds
- 41
- 52
Mostly Cloudy
- 38
- 51
Mostly Cloudy
- 40
- 53
Mostly Sunny
- 43
- 59
Partly Sunny
- 41
- 53
Rain Likely
- 38
- 48
Chance Rain
Today 17 Oct Cascades of Snohomish and Northern King Counties
Showers in the Morning, then partly sunny with a slight chance of Showers early in the afternoon. Partly sunny late in the afternoon. Snow level near 7500 feet decreasing to 5500 feet in the afternoon. Rainfall Amounts a tenth to a quarter of an inch possible. No snow accumulation. Afternoon pass Temperatures in the mid 40s. West wind in the Passes around 10 Mph.
Tonight 17 Oct Cascades of Snohomish and Northern King Counties
Partly cloudy. Freezing level near 6000 feet. Lows in the lower 30s. Light wind.
Olo Mountain Temperature Statistics
October Temperature
Arlington Municipal Airport (13.7 miles)
Lowest 12 October, 2026
32 °FAverage October
54 °FHighest 2 October, 2026
71.1 °F
Climate (2021–2026)
Arlington Municipal Airport (13.7 miles)
Average Low 2021–2026
42.6 °FAverage 2021–2026
50.9 °FAverage High 2021–2026
60 °F