Average annual temperature is 23.2 °C
Absolute maximum temperature: 37.1 °C
Absolute minimum temperature: 1.7 °C
Number of sunny days: 137 days
Number of rainy days: 228 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) | 28.0 | 30.2 | 32.1 | 34.5 | 34.8 | 35.5 | 35.6 | 37.1 | 34.2 | 31.6 | 32.2 | 28.2 |
| Average daytime temperature (°C) | 22.3 | 26.0 | 27.4 | 29.8 | 31.1 | 30.9 | 33.1 | 33.6 | 32.0 | 28.5 | 25.6 | 21.9 |
| Average temperature (°C) | 16.6 | 20.0 | 21.4 | 23.9 | 24.9 | 26.4 | 28.4 | 28.9 | 26.8 | 23.5 | 20.1 | 17.3 |
| Average night temperature (°C) | 12.4 | 15.5 | 16.7 | 19.3 | 20.0 | 22.9 | 25.0 | 25.2 | 22.8 | 19.4 | 16.0 | 14.0 |
| Absolute minimum temperature (°C) | 1.7 | 7.7 | 7.1 | 13.3 | 15.7 | 20.0 | 23.3 | 23.4 | 19.5 | 11.8 | 6.8 | 6.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.6 | 11.2 | 12.0 | 12.8 | 13.5 | 13.9 | 13.7 | 13.1 | 12.3 | 11.5 | 10.8 | 10.4 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.6 | 9.6 | 10.1 | 10.2 | 11.9 | 11.3 | 10.9 | 11.2 | 10.5 | 9.5 | 7.7 | 7.0 |
| Precipitation (mm) | 64 | 10 | 44 | 78 | 106 | 196 | 185 | 161 | 124 | 51 | 36 | 101 |
| Sunny days | 19 | 19 | 13 | 8 | 12 | 3 | 2 | 3 | 5 | 20 | 14 | 19 |
| Rainy days | 12 | 9 | 18 | 22 | 19 | 27 | 29 | 28 | 25 | 11 | 16 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Arlington Heights is at