Chehalis Weather Forecast
- 47
- 77
Increasing Clouds
- 43
- 69
Partly Sunny
- 48
- 71
Chance Rain
- 44
- 60
Rain
- 45
- 66
Chance Rain Showers
- 46
- 69
Mostly Cloudy
Today 22 May Lowlands of Lewis and Southern Thurston Counties
Sunny. Patchy fog in the morning. Highs in the mid to upper 70s. Light wind becoming northwest to 10 Mph in the afternoon.
Tonight 22 May Lowlands of Lewis and Southern Thurston Counties
Partly cloudy in the evening then becoming mostly cloudy. Patchy fog in the morning. Lows in the mid to upper 40s. West 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
57.1 °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