Average annual temperature is 20.6 °C
Absolute maximum temperature: 36.7 °C
Absolute minimum temperature: -0.5 °C
Number of sunny days: 153 days
Number of rainy days: 212 days
Look at detailed online map of Arran
* Weather data for Arran 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) | 25.3 | 28.6 | 28.7 | 29.2 | 34.3 | 36.7 | 35.9 | 36.7 | 32.9 | 30.7 | 28.5 | 23.6 |
| Average daytime temperature (°C) | 19.6 | 22.8 | 23.8 | 26.3 | 29.2 | 31.7 | 33.0 | 33.9 | 30.3 | 26.6 | 21.5 | 17.9 |
| Average temperature (°C) | 13.8 | 16.9 | 18.0 | 20.4 | 22.9 | 25.6 | 27.3 | 28.1 | 24.7 | 20.6 | 15.8 | 13.0 |
| Average night temperature (°C) | 9.4 | 12.8 | 13.5 | 15.7 | 17.6 | 21.1 | 23.8 | 24.0 | 20.4 | 15.7 | 11.5 | 9.1 |
| Absolute minimum temperature (°C) | -0.2 | 2.5 | 1.6 | 9.6 | 11.8 | 17.3 | 22.2 | 22.3 | 16.5 | 8.9 | 1.7 | -0.5 |
| 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 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.3 | 11.4 | 10.6 | 10.2 |
| 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) | 7.5 | 8.3 | 9.2 | 9.7 | 11.2 | 10.7 | 10.9 | 11.0 | 9.8 | 9.8 | 7.1 | 6.6 |
| Precipitation (mm) | 178 | 112 | 105 | 123 | 141 | 231 | 170 | 204 | 97 | 50 | 58 | 267 |
| Sunny days | 17 | 16 | 14 | 8 | 8 | 3 | 2 | 6 | 13 | 23 | 22 | 21 |
| Rainy days | 14 | 12 | 17 | 22 | 23 | 27 | 29 | 25 | 17 | 8 | 8 | 10 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Arran is at