Average annual temperature is 11.1 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: -22.7 °C
Number of sunny days: 183 days
Number of rainy days: 165 days
Number of snow days: 17 days
Look at detailed online map of Naperville
* Weather data for Naperville 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) | 11.2 | 14.4 | 20.1 | 25.3 | 31.4 | 32.3 | 33.8 | 36.5 | 33.4 | 27.5 | 19.5 | 14.6 |
| Average daytime temperature (°C) | 3.1 | 5.5 | 8.0 | 16.5 | 22.5 | 27.8 | 28.5 | 27.7 | 24.3 | 16.7 | 9.5 | 6.5 |
| Average temperature (°C) | -0.8 | 0.1 | 2.8 | 9.6 | 15.8 | 21.0 | 22.8 | 22.2 | 19.3 | 12.4 | 4.7 | 3.0 |
| Average night temperature (°C) | -3.5 | -4.1 | -1.0 | 3.8 | 10.1 | 15.1 | 17.9 | 17.7 | 15.3 | 8.9 | 1.0 | 0.6 |
| Absolute minimum temperature (°C) | -22.7 | -20.5 | -11.7 | -3.2 | 1.1 | 7.9 | 14.2 | 12.3 | 9.6 | -3.2 | -10.8 | -8.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.3 | 14.5 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.4 | 7.7 | 6.3 | 9.3 | 10.7 | 12.0 | 11.6 | 10.7 | 8.3 | 6.4 | 7.2 | 4.1 |
| Precipitation (mm) | 58 | 93 | 89 | 103 | 45 | 38 | 200 | 104 | 149 | 102 | 40 | 72 |
| Sunny days | 12 | 17 | 11 | 14 | 20 | 17 | 13 | 16 | 12 | 13 | 22 | 16 |
| Rainy days | 10 | 9 | 17 | 16 | 11 | 13 | 18 | 15 | 18 | 17 | 7 | 14 |
| Snow days | 9 | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
The best time to visit Naperville during the most sunny months:
The largest precipitation sum in Naperville is at