Average annual temperature is 19.4 °C
Absolute maximum temperature: 41.3 °C
Absolute minimum temperature: -1.6 °C
Number of sunny days: 203 days
Number of rainy days: 162 days
Look at detailed online map of Forest Grove
* Weather data for Forest Grove 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) | 23.9 | 26.9 | 27.7 | 29.4 | 33.1 | 38.2 | 38.4 | 41.3 | 37.2 | 32.9 | 27.9 | 22.7 |
| Average daytime temperature (°C) | 16.0 | 18.3 | 21.7 | 23.3 | 28.7 | 33.7 | 34.7 | 37.6 | 32.2 | 25.7 | 18.6 | 16.2 |
| Average temperature (°C) | 11.0 | 12.1 | 15.1 | 16.9 | 22.5 | 27.0 | 28.7 | 30.7 | 25.8 | 19.7 | 13.1 | 10.3 |
| Average night temperature (°C) | 7.4 | 7.8 | 10.4 | 12.1 | 17.3 | 21.6 | 24.0 | 25.4 | 21.0 | 15.3 | 8.8 | 5.8 |
| Absolute minimum temperature (°C) | -1.5 | -1.6 | -1.5 | 7.4 | 9.2 | 19.0 | 19.9 | 19.9 | 17.3 | 3.5 | -0.4 | -0.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.3 | 12.4 | 11.4 | 10.5 | 10.0 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 6.3 | 6.9 | 8.4 | 7.8 | 10.2 | 11.9 | 11.5 | 11.8 | 10.4 | 8.0 | 7.1 | 7.5 |
| Precipitation (mm) | 139 | 149 | 125 | 218 | 143 | 47 | 85 | 71 | 29 | 87 | 39 | 62 |
| Sunny days | 15 | 11 | 13 | 10 | 15 | 14 | 16 | 26 | 16 | 21 | 22 | 24 |
| Rainy days | 16 | 17 | 18 | 20 | 16 | 16 | 15 | 5 | 14 | 10 | 8 | 7 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Forest Grove during the most sunny months:
The largest precipitation sum in Forest Grove is at