Average annual temperature is 10.5 °C
Absolute maximum temperature: 37.3 °C
Absolute minimum temperature: -21.8 °C
Number of sunny days: 177 days
Number of rainy days: 169 days
Number of snow days: 19 days
Look at detailed online map of Winthrop Harbor
* Weather data for Winthrop Harbor 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) | 8.6 | 10.8 | 19.8 | 24.8 | 27.1 | 30.5 | 32.0 | 37.3 | 34.3 | 27.5 | 19.4 | 13.1 |
| Average daytime temperature (°C) | 2.4 | 4.2 | 5.9 | 14.3 | 18.2 | 24.4 | 26.6 | 26.3 | 22.5 | 16.4 | 9.3 | 5.9 |
| Average temperature (°C) | -1.0 | -0.6 | 1.9 | 8.9 | 13.3 | 19.0 | 22.1 | 21.9 | 19.2 | 12.6 | 5.0 | 3.0 |
| Average night temperature (°C) | -3.5 | -4.5 | -1.3 | 4.3 | 8.7 | 14.6 | 18.5 | 18.3 | 16.3 | 9.6 | 1.7 | 0.9 |
| Absolute minimum temperature (°C) | -21.8 | -21.1 | -11.2 | -1.9 | 1.5 | 7.5 | 14.2 | 13.5 | 11.1 | -1.7 | -10.5 | -7.0 |
| 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) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.6 | 7.6 | 6.6 | 8.6 | 10.7 | 11.9 | 11.7 | 10.5 | 8.1 | 6.4 | 6.7 | 3.6 |
| Precipitation (mm) | 55 | 99 | 75 | 84 | 27 | 43 | 105 | 102 | 86 | 107 | 49 | 71 |
| Sunny days | 11 | 18 | 8 | 15 | 21 | 20 | 10 | 15 | 11 | 12 | 21 | 15 |
| Rainy days | 12 | 7 | 19 | 15 | 10 | 10 | 21 | 16 | 19 | 18 | 7 | 15 |
| Snow days | 8 | 3 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 |
The best time to visit Winthrop Harbor during the most sunny months:
The largest precipitation sum in Winthrop Harbor is at