Average annual temperature is 11.1 °C
Absolute maximum temperature: 37.1 °C
Absolute minimum temperature: -6.0 °C
Number of sunny days: 161 days
Number of rainy days: 203 days
Number of snow days: 1 day
Look at detailed online map of City of Chehalis
* Weather data for City of Chehalis United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 13.9 | 14.4 | 17.8 | 25.5 | 31.6 | 30.3 | 33.2 | 37.1 | 30.8 | 26.7 | 16.1 | 14.5 |
| Average daytime temperature (°C) | 9.1 | 8.3 | 10.9 | 13.0 | 22.1 | 23.2 | 27.9 | 28.9 | 22.6 | 17.1 | 10.5 | 10.0 |
| Average temperature (°C) | 5.5 | 3.8 | 5.2 | 7.7 | 14.7 | 15.4 | 19.1 | 20.4 | 15.7 | 11.4 | 6.5 | 6.9 |
| Average night temperature (°C) | 2.7 | 1.1 | 1.6 | 4.2 | 9.1 | 9.8 | 12.3 | 14.5 | 11.1 | 7.9 | 3.7 | 4.6 |
| Absolute minimum temperature (°C) | -6.0 | -5.9 | -2.9 | -0.6 | 3.9 | 5.2 | 10.1 | 9.4 | 6.6 | -1.5 | -3.1 | -1.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 |
| Daylight mean duration (h) | 9.0 | 10.3 | 11.9 | 13.6 | 15.0 | 15.8 | 15.4 | 14.2 | 12.6 | 10.9 | 9.4 | 8.6 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.0 | 4.7 | 6.7 | 6.0 | 10.7 | 11.4 | 12.9 | 11.3 | 8.0 | 6.0 | 5.0 | 3.0 |
| Precipitation (mm) | 122 | 98 | 127 | 165 | 34 | 22 | 4 | 23 | 62 | 98 | 160 | 250 |
| Sunny days | 7 | 9 | 5 | 5 | 18 | 22 | 27 | 18 | 14 | 14 | 14 | 8 |
| Rainy days | 24 | 18 | 26 | 25 | 13 | 8 | 4 | 13 | 16 | 17 | 16 | 23 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit City of Chehalis during the most sunny months:
Months with the longest average daylight duration in City of Chehalis:
The largest precipitation sum in City of Chehalis is at