Average annual temperature is 12.2 °C
Absolute maximum temperature: 38.6 °C
Absolute minimum temperature: -22.8 °C
Number of sunny days: 228 days
Number of rainy days: 116 days
Number of snow days: 21 days
Look at detailed online map of Long Island
* Weather data for Long Island 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) | 11.0 | 15.3 | 21.7 | 28.8 | 29.9 | 33.3 | 36.2 | 38.6 | 37.4 | 30.6 | 19.7 | 15.4 |
| Average daytime temperature (°C) | 1.6 | 6.2 | 10.1 | 19.2 | 24.6 | 29.0 | 30.8 | 32.0 | 29.0 | 19.8 | 13.5 | 6.8 |
| Average temperature (°C) | -3.1 | -1.3 | 3.0 | 11.7 | 18.4 | 22.8 | 24.7 | 25.5 | 22.1 | 13.3 | 6.8 | 1.9 |
| Average night temperature (°C) | -6.4 | -6.1 | -2.1 | 5.6 | 12.8 | 17.1 | 19.3 | 19.9 | 16.1 | 7.8 | 1.8 | -1.7 |
| Absolute minimum temperature (°C) | -22.8 | -17.6 | -8.0 | -4.6 | 1.8 | 13.3 | 13.1 | 14.2 | 10.5 | -7.8 | -5.4 | -5.3 |
| 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 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 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) | 6.4 | 8.2 | 8.7 | 11.0 | 10.8 | 12.4 | 12.2 | 11.8 | 10.3 | 8.5 | 7.4 | 4.9 |
| Precipitation (mm) | 54 | 33 | 19 | 15 | 72 | 69 | 62 | 24 | 27 | 32 | 21 | 52 |
| Sunny days | 21 | 21 | 21 | 24 | 10 | 10 | 16 | 18 | 23 | 21 | 24 | 19 |
| Rainy days | 4 | 2 | 7 | 6 | 21 | 20 | 15 | 13 | 7 | 9 | 3 | 9 |
| Snow days | 6 | 5 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 3 |
The best time to visit Long Island during the most sunny months:
The largest precipitation sum in Long Island is at