Average annual temperature is 9.8 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: -27.6 °C
Number of sunny days: 110 days
Number of rainy days: 229 days
Number of snow days: 26 days
Look at detailed online map of Oswego County
* Weather data for Oswego 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) | 9.4 | 17.0 | 14.6 | 28.2 | 26.0 | 29.0 | 32.7 | 28.5 | 30.6 | 29.2 | 14.9 | 11.4 |
| Average daytime temperature (°C) | 2.7 | 4.4 | 4.4 | 15.4 | 17.9 | 23.0 | 26.5 | 23.6 | 22.2 | 16.5 | 7.7 | 6.1 |
| Average temperature (°C) | -0.3 | -1.4 | 0.4 | 9.1 | 12.3 | 18.0 | 21.8 | 19.6 | 17.6 | 12.5 | 3.9 | 3.1 |
| Average night temperature (°C) | -2.9 | -5.9 | -3.3 | 4.2 | 7.2 | 14.0 | 18.0 | 16.2 | 14.0 | 9.6 | 1.1 | 0.9 |
| Absolute minimum temperature (°C) | -9.9 | -27.6 | -12.5 | -4.9 | 0.7 | 10.0 | 14.1 | 12.1 | 7.9 | 2.0 | -4.3 | -7.3 |
| 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) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.0 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| 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 | 8.0 |
| Sunshine mean duration (h) | 2.4 | 4.7 | 5.6 | 8.6 | 11.8 | 11.0 | 11.4 | 10.4 | 9.8 | 5.5 | 4.9 | 2.4 |
| Precipitation (mm) | 129 | 87 | 104 | 115 | 67 | 157 | 140 | 127 | 51 | 146 | 111 | 157 |
| Sunny days | 4 | 5 | 10 | 12 | 21 | 9 | 7 | 6 | 16 | 7 | 6 | 7 |
| Rainy days | 21 | 15 | 15 | 18 | 10 | 21 | 24 | 25 | 14 | 24 | 21 | 21 |
| Snow days | 6 | 8 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 |
The best time to visit Oswego County during the most sunny months:
Months with the longest average daylight duration in Oswego County:
The largest precipitation sum in Oswego County is at