Average annual temperature is 9.3 °C
Absolute maximum temperature: 37.0 °C
Absolute minimum temperature: -21.1 °C
Number of sunny days: 223 days
Number of rainy days: 106 days
Number of snow days: 36 days
Look at detailed online map of Iron Mountain
* Weather data for Iron Mountain 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) | 4.7 | 4.7 | 5.9 | 23.8 | 23.2 | 26.9 | 37.0 | 31.4 | 28.4 | 23.7 | 20.1 | 11.5 |
| Average daytime temperature (°C) | -1.2 | 0.1 | 1.6 | 12.1 | 19.8 | 23.6 | 32.1 | 26.8 | 23.3 | 17.3 | 9.7 | 6.1 |
| Average temperature (°C) | -4.2 | -3.8 | -2.0 | 5.9 | 14.1 | 17.6 | 26.3 | 21.4 | 17.4 | 11.3 | 4.9 | 2.0 |
| Average night temperature (°C) | -7.3 | -7.5 | -5.4 | 0.5 | 8.1 | 11.3 | 19.6 | 15.8 | 11.7 | 6.3 | 1.0 | -1.4 |
| Absolute minimum temperature (°C) | -21.1 | -16.3 | -11.6 | -12.4 | 0.9 | 8.4 | 14.7 | 13.1 | 6.8 | -6.3 | -11.7 | -8.1 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.9 | 8.7 | 8.5 | 11.7 | 12.6 | 12.8 | 13.3 | 11.5 | 10.6 | 10.2 | 8.6 | 8.1 |
| Precipitation (mm) | 108 | 45 | 87 | 21 | 30 | 30 | 8 | 57 | 18 | 18 | 34 | 7 |
| Sunny days | 10 | 17 | 12 | 25 | 12 | 15 | 25 | 12 | 20 | 26 | 23 | 26 |
| Rainy days | 7 | 0 | 11 | 4 | 19 | 15 | 6 | 19 | 10 | 5 | 6 | 4 |
| Snow days | 14 | 11 | 8 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Iron Mountain during the most sunny months:
The largest precipitation sum in Iron Mountain is at