Average annual temperature is 8.8 °C
Absolute maximum temperature: 35.1 °C
Absolute minimum temperature: -25.2 °C
Number of sunny days: 215 days
Number of rainy days: 123 days
Number of snow days: 27 days
Look at detailed online map of Heron Lake
* Weather data for Heron Lake 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) | 2.2 | 4.6 | 7.6 | 27.2 | 29.6 | 30.7 | 34.4 | 35.1 | 33.2 | 31.0 | 17.8 | 11.1 |
| Average daytime temperature (°C) | -4.8 | -2.1 | 0.8 | 13.0 | 23.3 | 27.4 | 27.2 | 27.7 | 25.2 | 15.1 | 9.0 | 5.0 |
| Average temperature (°C) | -8.0 | -7.2 | -3.9 | 6.7 | 17.0 | 22.1 | 21.5 | 22.3 | 19.7 | 10.6 | 3.6 | 0.2 |
| Average night temperature (°C) | -10.8 | -11.3 | -7.8 | 1.9 | 11.3 | 17.1 | 16.5 | 18.0 | 15.3 | 7.2 | -0.5 | -3.0 |
| Absolute minimum temperature (°C) | -23.0 | -25.2 | -16.8 | -7.4 | 1.0 | 10.0 | 11.3 | 11.4 | 10.0 | -6.0 | -10.8 | -8.3 |
| 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 | 9.0 |
| Daylight mean duration (h) | 9.3 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.1 | 14.0 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 4.1 | 6.9 | 6.7 | 8.2 | 11.6 | 12.8 | 12.4 | 11.5 | 10.2 | 7.5 | 7.0 | 5.2 |
| Precipitation (mm) | 50 | 68 | 64 | 61 | 93 | 70 | 83 | 103 | 39 | 137 | 2 | 62 |
| Sunny days | 20 | 18 | 21 | 17 | 16 | 13 | 13 | 22 | 14 | 15 | 24 | 22 |
| Rainy days | 4 | 5 | 5 | 11 | 15 | 17 | 18 | 9 | 16 | 13 | 4 | 6 |
| Snow days | 7 | 5 | 5 | 2 | 0 | 0 | 0 | 0 | 0 | 3 | 2 | 3 |
The best time to visit Heron Lake during the most sunny months:
Months with the longest average daylight duration in Heron Lake:
The largest precipitation sum in Heron Lake is at