Average annual temperature is 20.9 °C
Absolute maximum temperature: 40.5 °C
Absolute minimum temperature: -1.2 °C
Number of sunny days: 157 days
Number of rainy days: 208 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) | 23.6 | 27.7 | 28.2 | 28.9 | 34.8 | 38.6 | 37.4 | 40.5 | 35.7 | 32.6 | 27.6 | 24.5 |
| Average daytime temperature (°C) | 18.8 | 21.2 | 22.9 | 25.2 | 29.9 | 33.2 | 34.9 | 38.2 | 33.2 | 27.3 | 20.6 | 17.0 |
| Average temperature (°C) | 13.7 | 15.9 | 17.5 | 19.5 | 23.6 | 26.8 | 28.5 | 31.0 | 26.6 | 20.7 | 14.9 | 12.0 |
| Average night temperature (°C) | 9.6 | 12.2 | 13.1 | 14.8 | 18.4 | 21.6 | 23.9 | 25.5 | 21.3 | 15.5 | 10.6 | 7.9 |
| Absolute minimum temperature (°C) | 0.0 | 1.5 | -1.2 | 8.4 | 11.0 | 18.6 | 20.1 | 20.8 | 16.6 | 8.7 | 0.1 | 1.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.4 | 11.4 | 10.6 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 7.0 | 7.5 | 9.1 | 9.3 | 10.9 | 11.2 | 11.6 | 11.8 | 10.9 | 9.3 | 6.6 | 7.5 |
| Precipitation (mm) | 243 | 79 | 107 | 147 | 102 | 119 | 97 | 40 | 59 | 51 | 130 | 181 |
| Sunny days | 16 | 8 | 16 | 11 | 7 | 5 | 6 | 12 | 11 | 24 | 19 | 22 |
| Rainy days | 15 | 20 | 15 | 19 | 24 | 25 | 25 | 19 | 19 | 7 | 11 | 9 |
| Snow days | 0 | 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