Average annual temperature is 16.6 °C
Absolute maximum temperature: 35.7 °C
Absolute minimum temperature: -4.9 °C
Number of sunny days: 173 days
Number of rainy days: 192 days
Look at detailed online map of Forest Brook
* Weather data for Forest Brook 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) | 19.8 | 24.2 | 24.5 | 26.9 | 30.4 | 32.1 | 35.0 | 35.7 | 33.2 | 27.9 | 25.1 | 20.5 |
| Average daytime temperature (°C) | 13.7 | 16.8 | 17.7 | 21.2 | 24.5 | 28.7 | 32.0 | 31.2 | 27.7 | 22.3 | 17.0 | 13.1 |
| Average temperature (°C) | 8.6 | 11.4 | 11.9 | 15.3 | 19.1 | 22.8 | 26.0 | 25.5 | 22.1 | 16.9 | 11.4 | 8.0 |
| Average night temperature (°C) | 4.8 | 7.4 | 6.8 | 10.5 | 14.6 | 17.8 | 21.0 | 21.0 | 17.2 | 12.3 | 7.2 | 3.8 |
| Absolute minimum temperature (°C) | -3.8 | -3.8 | -4.9 | 4.3 | 5.1 | 13.9 | 18.6 | 17.2 | 12.1 | 5.8 | -2.6 | -3.3 |
| 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 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 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) | 5.5 | 6.1 | 8.3 | 9.0 | 10.0 | 10.9 | 11.7 | 10.4 | 10.1 | 8.9 | 6.8 | 6.4 |
| Precipitation (mm) | 146 | 140 | 136 | 150 | 114 | 147 | 82 | 185 | 102 | 47 | 54 | 105 |
| Sunny days | 12 | 9 | 18 | 13 | 11 | 12 | 9 | 9 | 19 | 23 | 19 | 19 |
| Rainy days | 19 | 19 | 13 | 17 | 20 | 18 | 22 | 22 | 11 | 8 | 11 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Forest Brook during the most sunny months:
The largest precipitation sum in Forest Brook is at