Average annual temperature is 16.0 °C
Absolute maximum temperature: 36.2 °C
Absolute minimum temperature: -5.3 °C
Number of sunny days: 181 days
Number of rainy days: 184 days
Look at detailed online map of Lake Forest
* Weather data for Lake Forest 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) | 20.8 | 24.2 | 24.4 | 29.5 | 29.5 | 32.7 | 35.9 | 36.2 | 32.8 | 29.8 | 26.9 | 19.9 |
| Average daytime temperature (°C) | 12.4 | 15.5 | 16.6 | 21.2 | 25.8 | 28.9 | 31.9 | 30.3 | 29.0 | 23.0 | 17.4 | 12.7 |
| Average temperature (°C) | 7.3 | 9.8 | 10.3 | 14.8 | 19.2 | 22.4 | 25.9 | 24.8 | 22.3 | 16.7 | 10.7 | 6.9 |
| Average night temperature (°C) | 3.6 | 5.5 | 5.2 | 9.3 | 13.7 | 17.0 | 21.0 | 20.3 | 17.0 | 11.3 | 5.6 | 2.6 |
| Absolute minimum temperature (°C) | -4.8 | -5.2 | -5.3 | 2.8 | 5.0 | 11.7 | 16.2 | 15.2 | 12.7 | 5.4 | -3.9 | -3.9 |
| 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 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.9 | 6.0 | 8.3 | 9.3 | 10.5 | 11.2 | 11.6 | 10.1 | 10.9 | 8.7 | 7.5 | 6.6 |
| Precipitation (mm) | 123 | 119 | 94 | 105 | 107 | 76 | 51 | 128 | 32 | 20 | 47 | 73 |
| Sunny days | 12 | 12 | 19 | 17 | 11 | 12 | 6 | 15 | 17 | 20 | 23 | 17 |
| Rainy days | 19 | 16 | 12 | 13 | 20 | 18 | 25 | 16 | 13 | 11 | 7 | 14 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Lake Forest during the most sunny months:
The largest precipitation sum in Lake Forest is at