Average annual temperature is 12.9 °C
Absolute maximum temperature: 33.4 °C
Absolute minimum temperature: -9.4 °C
Number of sunny days: 166 days
Number of rainy days: 189 days
Number of snow days: 10 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) | 16.4 | 22.4 | 23.7 | 27.3 | 29.5 | 32.3 | 33.3 | 32.7 | 33.4 | 28.1 | 22.0 | 16.5 |
| Average daytime temperature (°C) | 7.7 | 12.0 | 11.9 | 18.3 | 22.3 | 26.0 | 29.5 | 28.3 | 25.7 | 19.1 | 12.3 | 9.1 |
| Average temperature (°C) | 3.5 | 5.1 | 5.6 | 12.1 | 16.3 | 20.4 | 23.8 | 22.6 | 20.0 | 14.0 | 6.6 | 4.8 |
| Average night temperature (°C) | 0.2 | 0.4 | 0.9 | 6.6 | 10.8 | 15.2 | 19.0 | 17.8 | 15.0 | 9.9 | 2.5 | 1.6 |
| Absolute minimum temperature (°C) | -6.9 | -9.4 | -7.8 | -0.7 | 3.2 | 10.2 | 14.7 | 12.6 | 9.7 | 1.0 | -7.1 | -5.1 |
| 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) | 9.7 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.5 | 11.2 | 10.0 | 9.4 |
| 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) | 3.7 | 7.2 | 7.5 | 9.1 | 9.9 | 10.8 | 11.8 | 10.7 | 9.6 | 7.2 | 7.2 | 5.1 |
| Precipitation (mm) | 168 | 54 | 127 | 69 | 79 | 111 | 111 | 74 | 51 | 79 | 46 | 66 |
| Sunny days | 4 | 16 | 16 | 13 | 19 | 12 | 5 | 16 | 16 | 14 | 22 | 13 |
| Rainy days | 23 | 12 | 11 | 17 | 12 | 18 | 26 | 15 | 14 | 17 | 7 | 17 |
| Snow days | 4 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Adelphi during the most sunny months:
The largest precipitation sum in Adelphi is at