Olo Mountain Weather Forecast
- 49
- 64
Areas Smoke
- 50
- 68
Areas Smoke
- 50
- 66
Rain Likely
- 46
- 57
Chance Rain
- 51
- 63
Partly Sunny
- 52
- 67
Chance Rain
Today 18 Sep Cascades of Snohomish and Northern King Counties
Mostly cloudy in the morning then becoming mostly sunny. Areas of smoke. Freezing level near 12500 feet. Afternoon pass Temperatures in the mid 60s. Light wind.
Tonight 18 Sep Cascades of Snohomish and Northern King Counties
Mostly clear. Areas of smoke after midnight. Freezing level near 13500 feet. Lows in the upper 40s. Light wind.
Olo Mountain Temperature Statistics
September Temperature
Arlington Municipal Airport (13.7 miles)
Lowest 16 September, 2025
46.4 °FAverage September
63.1 °FHighest 16 September, 2025
90 °F
Climate (2020–Present)
Arlington Municipal Airport (13.7 miles)
Average Low 2020–2025
42.4 °FAverage 2020–2025
50.6 °FAverage High 2020–2025
59.7 °F