Average annual temperature is 10.2 °C
Absolute maximum temperature: 31.3 °C
Absolute minimum temperature: -23.3 °C
Number of sunny days: 125 days
Number of rainy days: 210 days
Number of snow days: 30 days
Look at detailed online map of City of Oswego
* Weather data for City of Oswego 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) | 9.3 | 15.5 | 10.6 | 23.8 | 23.6 | 29.1 | 31.3 | 27.9 | 28.3 | 27.8 | 14.1 | 11.9 |
| Average daytime temperature (°C) | 2.8 | 4.1 | 3.7 | 13.3 | 15.5 | 21.1 | 25.3 | 23.1 | 21.4 | 16.2 | 8.1 | 6.3 |
| Average temperature (°C) | 0.4 | -0.8 | 0.9 | 8.6 | 11.8 | 17.7 | 22.0 | 20.2 | 18.4 | 13.3 | 5.1 | 3.8 |
| Average night temperature (°C) | -1.7 | -4.5 | -1.6 | 4.9 | 8.3 | 15.0 | 19.3 | 17.7 | 15.6 | 10.9 | 2.8 | 1.9 |
| Absolute minimum temperature (°C) | -7.0 | -23.3 | -7.2 | -4.6 | 3.5 | 11.2 | 17.0 | 14.7 | 10.3 | 2.7 | -2.2 | -5.5 |
| 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 | 5.0 | 5.8 | 8.8 | 11.8 | 11.1 | 11.6 | 10.4 | 9.9 | 5.5 | 5.0 | 2.5 |
| Precipitation (mm) | 122 | 78 | 96 | 124 | 77 | 122 | 114 | 166 | 47 | 138 | 116 | 167 |
| Sunny days | 3 | 7 | 10 | 14 | 23 | 12 | 12 | 8 | 17 | 9 | 5 | 5 |
| Rainy days | 20 | 14 | 12 | 16 | 8 | 18 | 19 | 23 | 13 | 22 | 23 | 22 |
| Snow days | 8 | 7 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
The best time to visit City of Oswego during the most sunny months:
Months with the longest average daylight duration in City of Oswego:
The largest precipitation sum in City of Oswego is at