Average annual temperature is 8.6 °C
Absolute maximum temperature: 32.0 °C
Absolute minimum temperature: -17.7 °C
Number of sunny days: 156 days
Number of rainy days: 164 days
Number of snow days: 45 days
Look at detailed online map of Roscommon County
* Weather data for Roscommon 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) | 4.6 | 10.1 | 11.0 | 26.6 | 30.2 | 31.1 | 32.0 | 30.2 | 30.9 | 27.7 | 14.4 | 10.3 |
| Average daytime temperature (°C) | 0.1 | 1.2 | 3.7 | 13.2 | 20.2 | 25.0 | 25.9 | 24.2 | 21.7 | 14.3 | 6.2 | 4.2 |
| Average temperature (°C) | -2.6 | -3.5 | -1.2 | 7.4 | 13.6 | 18.9 | 20.7 | 18.8 | 16.9 | 10.3 | 2.2 | 1.2 |
| Average night temperature (°C) | -4.7 | -7.2 | -5.1 | 2.8 | 8.1 | 14.0 | 16.5 | 15.0 | 13.3 | 7.7 | -0.6 | -0.9 |
| Absolute minimum temperature (°C) | -17.6 | -17.7 | -12.4 | -5.2 | 0.9 | 9.0 | 13.2 | 9.1 | 8.2 | -1.7 | -7.6 | -5.6 |
| 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 | 13.5 | 14.8 | 15.5 | 15.1 | 14.0 | 12.5 | 11.0 | 9.6 | 8.9 |
| 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) | 2.5 | 5.5 | 7.3 | 8.4 | 10.7 | 11.9 | 12.4 | 10.3 | 8.8 | 5.8 | 5.4 | 3.3 |
| Precipitation (mm) | 56 | 68 | 62 | 92 | 33 | 62 | 130 | 95 | 52 | 78 | 38 | 57 |
| Sunny days | 10 | 10 | 9 | 11 | 22 | 18 | 8 | 12 | 16 | 9 | 18 | 13 |
| Rainy days | 11 | 4 | 11 | 19 | 9 | 12 | 23 | 19 | 14 | 21 | 8 | 13 |
| Snow days | 10 | 14 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 5 |
The best time to visit Roscommon County during the most sunny months:
Months with the longest average daylight duration in Roscommon County:
The largest precipitation sum in Roscommon County is at