Average annual temperature is 12.7 °C
Absolute maximum temperature: 33.5 °C
Absolute minimum temperature: -16.9 °C
Number of sunny days: 177 days
Number of rainy days: 183 days
Number of snow days: 5 days
Look at detailed online map of Smithtown
* Weather data for Smithtown 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) | 18.4 | 19.9 | 14.4 | 28.5 | 27.6 | 28.7 | 32.0 | 29.6 | 33.5 | 26.1 | 18.6 | 15.8 |
| Average daytime temperature (°C) | 8.0 | 7.3 | 9.3 | 16.7 | 19.8 | 23.6 | 28.4 | 26.4 | 23.5 | 18.8 | 11.0 | 9.0 |
| Average temperature (°C) | 4.7 | 3.3 | 5.0 | 11.7 | 14.7 | 18.8 | 24.0 | 22.3 | 19.7 | 14.7 | 6.9 | 5.5 |
| Average night temperature (°C) | 1.8 | -0.5 | 1.4 | 7.8 | 10.3 | 15.1 | 20.5 | 19.0 | 16.8 | 11.6 | 3.6 | 2.7 |
| Absolute minimum temperature (°C) | -2.6 | -16.9 | -2.9 | 0.3 | 5.4 | 9.7 | 17.1 | 16.2 | 12.3 | 7.1 | -3.0 | -3.8 |
| 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 | 9.3 |
| 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) | 4.8 | 6.6 | 7.5 | 8.6 | 12.3 | 11.4 | 11.7 | 10.5 | 7.8 | 7.9 | 7.3 | 5.5 |
| Precipitation (mm) | 129 | 55 | 142 | 114 | 60 | 79 | 155 | 142 | 238 | 90 | 54 | 171 |
| Sunny days | 12 | 16 | 14 | 13 | 21 | 12 | 9 | 13 | 13 | 16 | 19 | 19 |
| Rainy days | 18 | 10 | 16 | 17 | 10 | 18 | 22 | 18 | 17 | 15 | 10 | 12 |
| Snow days | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Smithtown during the most sunny months:
The largest precipitation sum in Smithtown is at