Montesano Weather Forecast
- 49
- 68
Rain Likely
- 48
- 73
Partly Sunny
- 48
- 72
Partly Sunny
- 55
- 79
Partly Sunny
- 52
- 70
Mostly Cloudy
- 49
- 71
Partly Sunny
Today 28 Jul Lower Chehalis River Valley
Mostly cloudy. Patchy fog in the morning. A chance of rain in the morning. Rain likely early in the Afternoon, then a slight chance of rain late in the afternoon. Rainfall Amounts less than a tenth of an inch likely. Highs in the mid 60s to lower 70s. South wind 10 to 15 Mph becoming southwest in the afternoon. Gusts to 25 Mph.
Tonight 28 Jul Lower Chehalis River Valley
Partly cloudy in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows near 50. West wind around 10 Mph in the evening becoming light.
Montesano Temperature Statistics
July Temperature
Hoquiam, Bowerman Airport (14.9 miles)
Lowest 6 July, 2026
47.6 °FAverage July
61 °FHighest 21 July, 2026
79.6 °F
Climate (2021–2026)
Hoquiam, Bowerman Airport (14.9 miles)
Average Low 2021–2026
46.3 °FAverage 2021–2026
52.3 °FAverage High 2021–2026
58.6 °F