Average annual temperature is 11.8 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: -13.6 °C
Number of sunny days: 167 days
Number of rainy days: 193 days
Number of snow days: 5 days
Look at detailed online map of City of Williamsport
* Weather data for City of 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) | 13.7 | 19.1 | 17.2 | 29.3 | 31.2 | 33.4 | 34.9 | 32.0 | 33.5 | 27.6 | 18.9 | 12.6 |
| Average daytime temperature (°C) | 6.3 | 8.5 | 9.3 | 18.7 | 22.2 | 25.9 | 30.3 | 27.5 | 24.3 | 18.4 | 10.2 | 7.4 |
| Average temperature (°C) | 2.7 | 2.2 | 3.5 | 11.6 | 14.8 | 19.6 | 23.9 | 21.7 | 18.7 | 13.3 | 4.9 | 3.7 |
| Average night temperature (°C) | -0.3 | -2.3 | -0.9 | 5.8 | 7.9 | 14.1 | 18.6 | 16.9 | 14.0 | 9.1 | 0.9 | 0.8 |
| Absolute minimum temperature (°C) | -4.8 | -13.6 | -6.0 | -1.2 | 2.2 | 8.8 | 14.4 | 12.7 | 8.4 | 2.1 | -5.1 | -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 | 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) | 3.8 | 6.6 | 6.8 | 8.5 | 11.5 | 10.9 | 11.4 | 10.1 | 8.5 | 7.1 | 7.1 | 3.5 |
| Precipitation (mm) | 91 | 49 | 92 | 112 | 32 | 102 | 136 | 152 | 113 | 84 | 49 | 123 |
| Sunny days | 12 | 15 | 12 | 15 | 21 | 10 | 10 | 8 | 15 | 16 | 19 | 14 |
| Rainy days | 19 | 12 | 19 | 15 | 10 | 20 | 21 | 23 | 15 | 15 | 10 | 14 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
The best time to visit City of Williamsport during the most sunny months:
The largest precipitation sum in City of Williamsport is at