Average annual temperature is 13.3 °C
Absolute maximum temperature: 36.1 °C
Absolute minimum temperature: -10.2 °C
Number of sunny days: 187 days
Number of rainy days: 174 days
Number of snow days: 4 days
Look at detailed online map of Williamsport
* Weather data for Williamsport 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) | 15.9 | 21.8 | 23.5 | 30.9 | 29.5 | 33.6 | 36.1 | 33.6 | 34.5 | 27.7 | 22.5 | 16.0 |
| Average daytime temperature (°C) | 8.5 | 11.1 | 12.1 | 21.1 | 22.6 | 27.0 | 31.8 | 29.8 | 25.4 | 20.0 | 12.4 | 9.4 |
| Average temperature (°C) | 4.3 | 5.1 | 5.9 | 13.7 | 15.7 | 20.3 | 25.1 | 23.5 | 19.7 | 14.2 | 6.5 | 4.9 |
| Average night temperature (°C) | 1.1 | 0.5 | 1.1 | 7.7 | 9.4 | 14.5 | 19.7 | 18.2 | 15.0 | 9.6 | 1.9 | 1.4 |
| Absolute minimum temperature (°C) | -3.9 | -10.2 | -6.0 | 1.4 | 2.1 | 9.9 | 16.6 | 14.1 | 9.5 | 3.0 | -5.6 | -4.1 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 14.9 | 14.7 | 13.7 | 12.5 | 11.2 | 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) | 4.8 | 6.9 | 7.6 | 9.2 | 10.4 | 11.0 | 12.0 | 11.2 | 8.8 | 8.1 | 7.7 | 4.9 |
| Precipitation (mm) | 56 | 43 | 71 | 119 | 46 | 128 | 69 | 49 | 100 | 51 | 61 | 98 |
| Sunny days | 13 | 18 | 14 | 17 | 18 | 12 | 7 | 13 | 16 | 18 | 24 | 17 |
| Rainy days | 18 | 8 | 17 | 13 | 13 | 18 | 24 | 18 | 14 | 13 | 5 | 13 |
| Snow days | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Williamsport during the most sunny months:
The largest precipitation sum in Williamsport is at