Olo Mountain Weather Forecast
- 52
- 65
Rain Showers
- 51
- 63
Chance Rain
- 55
- 73
Mostly Sunny
- 53
- 74
Partly Sunny
- 50
- 64
Slight Chance Rain
- 49
- 64
Partly Sunny
Today 22 Aug Cascades of Snohomish and Northern King Counties
Mostly cloudy with a chance of Showers and a slight chance of Thunderstorms until late Afternoon, then mostly cloudy with a chance of Thunderstorms late in the afternoon. Snow level near 12000 feet. Afternoon pass Temperatures in the upper 60s. West wind in the Passes around 10 Mph. Gusts to 20 Mph in the afternoon.
Tonight 22 Aug Cascades of Snohomish and Northern King Counties
Mostly cloudy. A chance of Showers and a slight chance of Thunderstorms in the evening. A slight chance of rain late in the Evening, then a chance of rain and snow after midnight. Snow level near 10000 feet. Lows in the upper 40s. West wind in the Passes around 10 Mph with Gusts to 25 Mph.
Olo Mountain Temperature Statistics
August Temperature
Arlington Municipal Airport (13.7 miles)
Lowest 3 August, 2026
46.4 °FAverage August
64.3 °FHighest 6 August, 2026
84.9 °F
Climate (2021–2026)
Arlington Municipal Airport (13.7 miles)
Average Low 2021–2026
42.5 °FAverage 2021–2026
50.9 °FAverage High 2021–2026
59.9 °F