Average annual temperature is 12.9 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: -10.4 °C
Number of sunny days: 152 days
Number of rainy days: 205 days
Number of snow days: 8 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) | 17.1 | 21.5 | 23.2 | 28.2 | 30.6 | 33.5 | 33.1 | 32.6 | 34.3 | 28.7 | 19.7 | 16.9 |
| Average daytime temperature (°C) | 8.5 | 11.7 | 11.6 | 19.1 | 22.5 | 26.4 | 29.5 | 27.8 | 25.5 | 19.0 | 12.1 | 9.6 |
| Average temperature (°C) | 4.1 | 5.2 | 5.6 | 12.3 | 15.9 | 20.2 | 23.7 | 22.1 | 19.7 | 13.9 | 6.7 | 5.3 |
| Average night temperature (°C) | 1.0 | 0.5 | 1.1 | 6.6 | 10.1 | 14.7 | 19.2 | 17.5 | 14.9 | 9.9 | 2.6 | 2.2 |
| Absolute minimum temperature (°C) | -5.6 | -10.4 | -7.6 | -1.1 | 2.3 | 9.7 | 15.4 | 12.7 | 9.4 | 1.8 | -6.5 | -4.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.4 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.2 | 7.0 | 6.9 | 8.7 | 10.4 | 11.2 | 11.3 | 10.6 | 9.1 | 7.4 | 7.0 | 5.0 |
| Precipitation (mm) | 109 | 58 | 118 | 64 | 95 | 110 | 101 | 103 | 42 | 111 | 47 | 71 |
| Sunny days | 8 | 15 | 12 | 14 | 18 | 11 | 6 | 10 | 13 | 13 | 20 | 12 |
| Rainy days | 20 | 12 | 18 | 16 | 13 | 19 | 25 | 21 | 17 | 18 | 9 | 17 |
| Snow days | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit Glendale Heights during the most sunny months:
The largest precipitation sum in Glendale Heights is at