Average annual temperature is 11.8 °C
Absolute maximum temperature: 37.5 °C
Absolute minimum temperature: -23.5 °C
Number of sunny days: 211 days
Number of rainy days: 138 days
Number of snow days: 16 days
Look at detailed online map of Adelphi
* Weather data for Adelphi 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) | 12.7 | 13.4 | 23.2 | 27.8 | 30.9 | 32.3 | 35.4 | 37.5 | 34.9 | 31.9 | 18.7 | 14.8 |
| Average daytime temperature (°C) | 1.1 | 5.2 | 8.4 | 17.8 | 24.9 | 29.0 | 29.1 | 28.9 | 26.9 | 18.3 | 11.1 | 7.1 |
| Average temperature (°C) | -3.1 | -1.2 | 2.5 | 10.8 | 18.4 | 23.1 | 23.6 | 23.9 | 21.0 | 13.5 | 5.6 | 2.8 |
| Average night temperature (°C) | -6.2 | -5.9 | -1.8 | 5.3 | 12.1 | 17.6 | 18.5 | 19.5 | 16.0 | 9.4 | 1.2 | -0.5 |
| Absolute minimum temperature (°C) | -23.5 | -23.2 | -12.3 | -3.9 | 2.0 | 10.0 | 13.2 | 13.5 | 10.1 | -3.6 | -11.3 | -6.2 |
| 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 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| 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) | 4.6 | 7.1 | 7.2 | 9.3 | 11.5 | 12.3 | 12.2 | 11.4 | 10.6 | 7.5 | 7.2 | 4.6 |
| Precipitation (mm) | 51 | 48 | 61 | 42 | 50 | 49 | 112 | 95 | 28 | 76 | 13 | 48 |
| Sunny days | 18 | 18 | 16 | 17 | 21 | 17 | 15 | 17 | 16 | 17 | 22 | 17 |
| Rainy days | 8 | 7 | 15 | 12 | 10 | 13 | 16 | 14 | 14 | 13 | 6 | 10 |
| Snow days | 5 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 4 |
The best time to visit Adelphi during the most sunny months:
The largest precipitation sum in Adelphi is at