Average annual temperature is 14.2 °C
Absolute maximum temperature: 35.2 °C
Absolute minimum temperature: -7.3 °C
Number of sunny days: 166 days
Number of rainy days: 198 days
Number of snow days: 1 day
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) | 17.7 | 24.4 | 23.5 | 25.9 | 27.6 | 31.7 | 33.9 | 35.2 | 30.4 | 28.7 | 23.9 | 16.5 |
| Average daytime temperature (°C) | 10.7 | 14.2 | 14.9 | 18.7 | 23.6 | 27.3 | 29.8 | 29.1 | 26.6 | 20.8 | 15.3 | 10.8 |
| Average temperature (°C) | 5.8 | 8.3 | 8.7 | 12.7 | 17.3 | 20.8 | 23.6 | 23.2 | 20.4 | 14.8 | 9.1 | 5.4 |
| Average night temperature (°C) | 2.3 | 4.1 | 3.9 | 7.6 | 12.1 | 15.4 | 18.8 | 18.7 | 15.2 | 9.6 | 4.4 | 1.5 |
| Absolute minimum temperature (°C) | -5.2 | -6.7 | -7.3 | 1.3 | 4.2 | 10.7 | 14.9 | 13.4 | 10.9 | 2.4 | -4.9 | -6.3 |
| 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 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.0 | 5.7 | 8.0 | 9.0 | 11.1 | 11.0 | 11.2 | 9.8 | 10.9 | 8.1 | 7.3 | 6.4 |
| Precipitation (mm) | 148 | 131 | 142 | 84 | 82 | 145 | 131 | 132 | 57 | 13 | 40 | 79 |
| Sunny days | 11 | 10 | 19 | 14 | 10 | 11 | 4 | 13 | 15 | 20 | 21 | 18 |
| Rainy days | 19 | 18 | 12 | 16 | 21 | 19 | 27 | 18 | 15 | 11 | 9 | 13 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Smithtown during the most sunny months:
The largest precipitation sum in Smithtown is at