Chehalis Weather Forecast
- 40
- 67
Increasing Clouds
- 44
- 69
Partly Sunny
- 45
- 64
Mostly Cloudy
- 46
- 72
Partly Sunny
- 47
- 72
Partly Sunny
- 46
- 74
Partly Sunny
Today 17 May Lowlands of Lewis and Southern Thurston Counties
Mostly sunny. Patchy fog in the morning. Highs in the 60s. Light wind.
Tonight 17 May Lowlands of Lewis and Southern Thurston Counties
Partly cloudy in the evening then becoming mostly cloudy. Lows near 40. Northwest wind to 10 Mph in the evening becoming light.
Chehalis Temperature Statistics
May Temperature
Chehalis-Centralia Airport (1.2 miles)
Lowest 1 May, 2026
44.6 °FAverage May
59.1 °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