January weather in Williamsport, PA
The average temperature in Williamsport in January is 28.1°F (20.5°F–35.6°F). Average precipitation: 2.99 inches. Average snowfall is 8.7 inches.
January is a winter month in Williamsport, and is cooler than the annual average of 51.8°F. Daily temperatures swing about 15.1°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 9h 20m. For travel, January is cold.
Avg High
35.6°F
Avg Low
20.5°F
Precipitation
2.99 in
Snow
8.7 in
January records in Williamsport
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 60.1°F (2005) | -2.9°F (2018) | 1.04 in (2003) |
| January 2 | 55.0°F (2000) | 8.1°F (2018) | 0.45 in (2006) |
| January 3 | 57.0°F (2000) | 0.0°F (2018) | 1.12 in (1999) |
| January 4 | 61.0°F (2000) | 0.0°F (2014) | 0.72 in (2004) |
| January 5 | 57.0°F (2007) | 6.1°F (2018) | 0.64 in (2005) |
| January 6 | 64.0°F (2007) | 1.9°F (2014) | 1.09 in (2005) |
| January 7 | 61.0°F (2008) | -5.1°F (2014) | 0.80 in (2009) |
| January 8 | 66.9°F (2008) | 5.0°F (2014) | 1.48 in (1998) |
| January 9 | 59.0°F (2008) | 1.0°F (2004) | 2.28 in (2024) |
| January 10 | 57.0°F (2016) | 0.0°F (2004) | 1.56 in (2016) |
| January 11 | 66.9°F (2020) | 3.0°F (2004) | 1.12 in (2008) |
| January 12 | 64.0°F (2018) | 12.0°F (2009) | 2.39 in (2018) |
| January 13 | 64.0°F (2005) | 8.1°F (2015) | 0.53 in (2012) |
| January 14 | 63.0°F (2005) | 6.1°F (2018) | 0.78 in (2005) |
| January 15 | 48.0°F (2020) | 1.0°F (2004) | 0.92 in (1999) |
| January 16 | 48.9°F (2007) | -0.9°F (2022) | 0.47 in (2013) |
| January 17 | 44.1°F (2002) | -11.0°F (2009) | 0.64 in (2010) |
| January 18 | 52.0°F (2006) | 1.9°F (2003) | 1.82 in (2006) |
| January 19 | 48.0°F (2013) | 5.0°F (2005) | 1.02 in (2023) |
| January 20 | 52.0°F (2006) | 3.0°F (2009) | 0.87 in (2019) |
| January 21 | 61.0°F (2006) | 1.0°F (2025) | 0.46 in (2012) |
| January 22 | 48.9°F (2002) | -5.1°F (2022) | 0.35 in (2005) |
| January 23 | 51.1°F (2017) | 1.0°F (2011) | 0.95 in (1998) |
| January 24 | 46.9°F (2020) | -6.0°F (2011) | 0.83 in (2019) |
| January 25 | 57.0°F (2010) | -2.0°F (2004) | 2.90 in (2010) |
| January 26 | 57.0°F (2024) | 0.0°F (2022) | 0.42 in (2015) |
| January 27 | 59.0°F (2002) | -6.0°F (2022) | 0.41 in (2004) |
| January 28 | 57.9°F (2002) | -2.0°F (2005) | 1.32 in (2024) |
| January 29 | 57.9°F (2002) | -2.0°F (2026) | 0.39 in (2013) |
| January 30 | 61.0°F (2013) | -6.0°F (2026) | 0.62 in (2013) |
| January 31 | 55.9°F (2013) | -4.0°F (2019) | 0.48 in (2013) |