Mount St Helens Weather Forecast
- 50
- 63
Sunny
- 44
- 60
Partly Sunny
- 43
- 51
Partly Sunny
- 44
- 52
Partly Sunny
- 46
- 51
Partly Sunny
- 48
- 57
Partly Sunny
Today 17 Jul South Washington Cascades
Sunny. Free air freezing level 16000 Feet, decreasing to free air freezing level 15000 feet this afternoon. West wind 5 to 10 Mph.
Tonight 17 Jul South Washington Cascades
Clear. Free air freezing level 16000 Feet, decreasing to free air freezing level 15000 feet after midnight. Northwest wind 5 to 10 Mph.
Mount St Helens Temperature Statistics
July Temperature
Southwest Washington Regional Airport (33.6 miles)
Lowest 5 July, 2025
48 °FAverage July
66.9 °FHighest 13 July, 2025
95 °F
Climate (2020–Present)
Southwest Washington Regional Airport (33.6 miles)
Average Low 2020–2025
45 °FAverage 2020–2025
52.8 °FAverage High 2020–2025
62.3 °F