Average annual temperature is 7.6 °C
Absolute maximum temperature: 35.2 °C
Absolute minimum temperature: -21.5 °C
Number of sunny days: 149 days
Number of rainy days: 154 days
Number of snow days: 62 days
Look at detailed online map of Ontonagon County
* Weather data for Ontonagon County 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) | 2.9 | 8.5 | 6.7 | 26.0 | 33.8 | 31.4 | 31.6 | 30.3 | 35.2 | 30.8 | 17.8 | 11.1 |
| Average daytime temperature (°C) | -1.9 | -1.4 | 1.7 | 8.4 | 20.2 | 23.6 | 24.7 | 24.2 | 23.0 | 13.1 | 6.0 | 4.6 |
| Average temperature (°C) | -4.4 | -5.3 | -2.3 | 3.4 | 13.5 | 17.8 | 19.0 | 18.8 | 17.6 | 9.7 | 2.2 | 0.9 |
| Average night temperature (°C) | -6.5 | -8.5 | -5.5 | -0.5 | 7.8 | 12.5 | 14.5 | 14.6 | 13.6 | 7.2 | -0.8 | -1.8 |
| Absolute minimum temperature (°C) | -21.5 | -18.6 | -11.6 | -9.2 | -2.2 | 5.6 | 10.8 | 6.7 | 6.9 | -3.9 | -9.0 | -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 | 8.0 |
| Daylight mean duration (h) | 9.0 | 10.3 | 11.9 | 13.6 | 15.0 | 15.8 | 15.4 | 14.2 | 12.6 | 10.9 | 9.4 | 8.6 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 2.0 | 5.4 | 6.7 | 7.1 | 11.2 | 11.7 | 12.3 | 10.9 | 9.0 | 5.3 | 4.9 | 3.2 |
| Precipitation (mm) | 71 | 72 | 61 | 178 | 58 | 64 | 69 | 61 | 61 | 88 | 56 | 61 |
| Sunny days | 8 | 6 | 14 | 10 | 15 | 18 | 13 | 17 | 16 | 3 | 15 | 14 |
| Rainy days | 6 | 5 | 8 | 15 | 16 | 12 | 18 | 14 | 14 | 25 | 9 | 12 |
| Snow days | 17 | 17 | 9 | 5 | 0 | 0 | 0 | 0 | 0 | 3 | 6 | 5 |
The best time to visit Ontonagon County during the most sunny months:
Months with the longest average daylight duration in Ontonagon County:
The largest precipitation sum in Ontonagon County is at