Average annual temperature is 11 °C
Absolute maximum temperature: 37.1 °C
Absolute minimum temperature: -7 °C
Number of sunny days: 162
Number of rainy days: 203
Number of snow days:
Average annual precipitation: 1315 mm
Look at detailed online map of Chehalis
* Weather data for Chehalis United States is based on climate observations for 2023 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 14.8 | 14.7 | 17.8 | 26.1 | 31.9 | 30 | 32.9 | 37.1 | 30.7 | 26.8 | 15.8 | 15.3 |
| Average daytime temperature (°C) | 9.3 | 8.1 | 10.9 | 13 | 22.1 | 23.2 | 27.8 | 28.8 | 22.5 | 17 | 10.4 | 9.9 |
| Average temperature (°C) | 5.5 | 3.6 | 5.2 | 7.6 | 14.6 | 15.4 | 18.9 | 20.5 | 15.6 | 11.4 | 6.5 | 6.9 |
| Average night temperature (°C) | 2.7 | 0.9 | 1.5 | 4.1 | 9.1 | 9.8 | 12.2 | 14.6 | 11.2 | 8.1 | 3.9 | 4.7 |
| Absolute minimum temperature (°C) | -5.8 | -7 | -3.3 | -0.7 | 4.4 | 5.4 | 9.1 | 9.8 | 7.4 | -2 | -3.1 | -2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.6 | 11 | 12.8 | 14.3 | 15.6 | 15.9 | 15.8 | 14.9 | 13.4 | 11.7 | 10.1 | 8.9 |
| Daylight mean duration (h) | 9.1 | 10.3 | 11.9 | 13.6 | 15 | 15.8 | 15.4 | 14.2 | 12.6 | 10.9 | 9.4 | 8.6 |
| Daylight minimum duration (h) | 8.6 | 9.7 | 11.1 | 12.8 | 14.4 | 15.6 | 14.9 | 13.4 | 11.8 | 10.1 | 8.9 | 8.6 |
| Sunshine mean duration (h) | 3.7 | 5.2 | 6.5 | 7 | 11.3 | 11.3 | 12.9 | 11.1 | 8.2 | 6.1 | 5.1 | 4 |
| Precipitation (mm) | 114 | 114 | 140 | 185 | 35 | 28 | 4 | 32 | 79 | 127 | 172 | 285 |
| Sunny days | 7 | 8 | 5 | 6 | 19 | 21 | 27 | 18 | 15 | 15 | 13 | 8 |
| Rainy days | 24 | 20 | 26 | 24 | 12 | 9 | 4 | 13 | 15 | 16 | 17 | 23 |
The best time to visit Chehalis during the most sunny months:
Months with the longest average daylight duration in Chehalis:
The largest precipitation sum in Chehalis is at