Average annual temperature is 11.0 °C
Absolute maximum temperature: 37.3 °C
Absolute minimum temperature: -21.8 °C
Number of sunny days: 179 days
Number of rainy days: 170 days
Number of snow days: 16 days
Look at detailed online map of Glendale Heights
* Weather data for Glendale Heights 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) | 10.2 | 14.6 | 20.3 | 25.4 | 30.4 | 32.4 | 32.3 | 37.3 | 34.2 | 27.7 | 19.7 | 14.6 |
| Average daytime temperature (°C) | 3.0 | 5.3 | 7.6 | 16.1 | 21.5 | 26.9 | 28.2 | 27.4 | 24.2 | 16.7 | 9.5 | 6.3 |
| Average temperature (°C) | -0.7 | 0.0 | 2.5 | 9.6 | 15.1 | 20.4 | 22.6 | 22.1 | 19.2 | 12.5 | 4.9 | 3.0 |
| Average night temperature (°C) | -3.4 | -3.8 | -1.0 | 4.0 | 9.6 | 14.8 | 18.0 | 17.9 | 15.3 | 9.2 | 1.2 | 0.7 |
| Absolute minimum temperature (°C) | -21.8 | -19.0 | -11.6 | -2.4 | 1.4 | 7.6 | 14.2 | 12.4 | 9.6 | -2.9 | -10.6 | -7.8 |
| 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 | 13.4 | 14.6 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.8 | 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) | 3.3 | 7.6 | 6.4 | 9.1 | 10.6 | 11.7 | 11.5 | 10.3 | 7.8 | 6.4 | 7.1 | 3.9 |
| Precipitation (mm) | 56 | 89 | 77 | 72 | 66 | 43 | 271 | 124 | 117 | 93 | 34 | 72 |
| Sunny days | 12 | 16 | 12 | 15 | 20 | 19 | 10 | 16 | 12 | 10 | 22 | 15 |
| Rainy days | 11 | 9 | 17 | 15 | 11 | 11 | 21 | 15 | 18 | 20 | 7 | 15 |
| Snow days | 8 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
The best time to visit Glendale Heights during the most sunny months:
The largest precipitation sum in Glendale Heights is at