Average annual temperature is 9.6 °C
Absolute maximum temperature: 31.7 °C
Absolute minimum temperature: -27.6 °C
Number of sunny days: 172 days
Number of rainy days: 172 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) | 11.2 | 13.2 | 11.5 | 23.9 | 29.7 | 28.3 | 31.4 | 28.8 | 31.7 | 29.0 | 17.5 | 13.6 |
| Average daytime temperature (°C) | 3.9 | 2.7 | 5.9 | 11.6 | 19.0 | 19.9 | 26.6 | 24.5 | 23.0 | 17.7 | 7.7 | 5.9 |
| Average temperature (°C) | 0.2 | -2.7 | 1.7 | 7.4 | 13.3 | 15.9 | 22.1 | 19.9 | 18.2 | 12.9 | 3.4 | 1.8 |
| Average night temperature (°C) | -3.2 | -7.1 | -2.1 | 3.9 | 8.4 | 12.6 | 18.5 | 16.1 | 14.6 | 9.3 | 0.1 | -1.2 |
| Absolute minimum temperature (°C) | -9.7 | -27.6 | -7.8 | -3.6 | 2.1 | 7.3 | 14.3 | 12.9 | 8.5 | 1.3 | -5.5 | -8.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.1 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 4.3 | 6.6 | 7.6 | 7.4 | 11.5 | 8.1 | 9.4 | 9.8 | 8.5 | 6.8 | 6.8 | 4.9 |
| Precipitation (mm) | 167 | 41 | 89 | 107 | 117 | 198 | 223 | 127 | 102 | 106 | 61 | 168 |
| Sunny days | 11 | 14 | 18 | 14 | 20 | 7 | 6 | 11 | 18 | 14 | 22 | 17 |
| Rainy days | 14 | 5 | 9 | 16 | 11 | 23 | 25 | 20 | 12 | 17 | 7 | 13 |
| Snow days | 6 | 9 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Long Island during the most sunny months:
Months with the longest average daylight duration in Long Island:
The largest precipitation sum in Long Island is at