Average annual temperature is 10.9 °C
Absolute maximum temperature: 37.2 °C
Absolute minimum temperature: -22.3 °C
Number of sunny days: 173 days
Number of rainy days: 171 days
Number of snow days: 21 days
Look at detailed online map of Arlington Heights
* Weather data for Arlington 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) | 10.9 | 14.8 | 20.2 | 26.0 | 31.5 | 32.2 | 32.7 | 37.2 | 34.0 | 27.6 | 19.6 | 14.5 |
| Average daytime temperature (°C) | 3.0 | 5.1 | 7.4 | 16.0 | 21.5 | 26.8 | 28.1 | 27.2 | 24.1 | 16.6 | 9.5 | 6.2 |
| Average temperature (°C) | -0.8 | -0.2 | 2.4 | 9.5 | 15.0 | 20.2 | 22.5 | 22.0 | 19.1 | 12.5 | 4.8 | 2.9 |
| Average night temperature (°C) | -3.6 | -4.1 | -1.1 | 4.0 | 9.5 | 14.7 | 18.0 | 17.9 | 15.3 | 9.1 | 1.1 | 0.6 |
| Absolute minimum temperature (°C) | -22.3 | -20.1 | -11.8 | -2.3 | 1.2 | 7.3 | 14.3 | 12.5 | 9.3 | -2.8 | -10.8 | -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 | 15.0 | 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) | 3.4 | 7.7 | 6.4 | 9.1 | 10.8 | 11.9 | 11.6 | 10.4 | 7.9 | 6.5 | 7.0 | 3.7 |
| Precipitation (mm) | 58 | 99 | 80 | 81 | 51 | 38 | 201 | 103 | 97 | 99 | 43 | 70 |
| Sunny days | 11 | 18 | 8 | 14 | 21 | 19 | 10 | 15 | 12 | 10 | 22 | 13 |
| Rainy days | 10 | 8 | 19 | 16 | 10 | 11 | 21 | 16 | 18 | 20 | 6 | 16 |
| Snow days | 10 | 2 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 2 |
The best time to visit Arlington Heights during the most sunny months:
The largest precipitation sum in Arlington Heights is at