Average annual temperature is 13.8 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: -7.9 °C
Number of sunny days: 181 days
Number of rainy days: 176 days
Number of snow days: 8 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) | 17.1 | 22.3 | 24.1 | 28.1 | 31.1 | 33.5 | 33.5 | 34.3 | 34.1 | 30.1 | 25.5 | 16.2 |
| Average daytime temperature (°C) | 8.3 | 12.9 | 13.1 | 19.1 | 23.8 | 27.8 | 30.3 | 29.5 | 26.9 | 20.3 | 13.3 | 9.8 |
| Average temperature (°C) | 4.1 | 6.0 | 6.5 | 12.5 | 17.3 | 21.7 | 24.7 | 23.8 | 20.9 | 14.7 | 7.6 | 5.0 |
| Average night temperature (°C) | 1.0 | 1.3 | 1.8 | 6.9 | 11.8 | 16.3 | 20.1 | 18.7 | 15.7 | 10.3 | 3.5 | 1.6 |
| Absolute minimum temperature (°C) | -5.7 | -7.9 | -6.9 | 0.4 | 3.5 | 11.8 | 16.5 | 13.2 | 10.8 | -0.9 | -6.5 | -5.8 |
| 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 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 4.3 | 7.8 | 7.3 | 9.1 | 10.2 | 11.2 | 11.7 | 11.4 | 10.3 | 7.4 | 7.8 | 4.8 |
| Precipitation (mm) | 121 | 49 | 165 | 88 | 65 | 95 | 103 | 119 | 46 | 94 | 32 | 77 |
| Sunny days | 6 | 16 | 14 | 14 | 19 | 13 | 9 | 15 | 19 | 17 | 24 | 15 |
| Rainy days | 21 | 12 | 14 | 16 | 12 | 17 | 22 | 16 | 11 | 14 | 6 | 15 |
| Snow days | 4 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Arlington Heights during the most sunny months:
The largest precipitation sum in Arlington Heights is at