Chehalis Weather Forecast
- 45
- 61
Rain Showers
- 45
- 65
Chance Rain
- 48
- 75
Partly Sunny
- 49
- 77
Partly Sunny
- 41
- 63
Partly Sunny
- 39
- 65
Partly Sunny
Today 25 May Lowlands of Lewis and Southern Thurston Counties
A slight chance of rain late in the morning. Rain at Times early in the Afternoon, then Showers and a slight chance of Thunderstorms late in the afternoon. Rainfall Amounts a tenth to a quarter of an inch Possible, except higher Amounts possible in Thunderstorms. Highs near 60. South wind 10 to 15 Mph with Gusts to 25 Mph.
Tonight 25 May Lowlands of Lewis and Southern Thurston Counties
Mostly cloudy. Rain likely in the Evening, then a chance of rain in the late evening and early morning. A slight chance of rain in the morning. Rainfall Amounts a tenth to a quarter of an inch possible. Lows in the lower to mid 40s. Southwest wind to 10 Mph with Gusts to 20 Mph in the evening becoming light.
Chehalis Temperature Statistics
May Temperature
Chehalis-Centralia Airport (1.2 miles)
Lowest 17 May, 2026
35.6 °FAverage May
57.4 °FHighest 3 May, 2026
84.2 °F
Climate (2021–Present)
Chehalis-Centralia Airport (1.2 miles)
Average Low 2021–2026
43.7 °FAverage 2021–2026
52.1 °FAverage High 2021–2026
61.4 °F