January weather in Portsmouth, NH
The average temperature in Portsmouth in January is °F (°F–°F). Average precipitation: 3.39 inches. Average snowfall is 15.9 inches.
January is a winter month in Portsmouth, and is cooler than the annual average of 0°F. Expect about 10 days with precipitation. Daylight averages about 9h 9m.
Avg High
°F
Avg Low
°F
Precipitation
3.39 in
Snow
15.9 in
January records in Portsmouth
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | — | — | 1.21 in (2019) |
| January 2 | — | — | 0.89 in (2003) |
| January 3 | — | — | 0.65 in (1995) |
| January 4 | — | — | 2.00 in (1999) |
| January 5 | — | — | 0.81 in (2000) |
| January 6 | — | — | 0.49 in (2014) |
| January 7 | — | — | 0.98 in (2009) |
| January 8 | — | — | 1.07 in (1998) |
| January 9 | — | — | 0.64 in (1996) |
| January 10 | — | — | 2.54 in (2024) |
| January 11 | — | — | 1.43 in (2016) |
| January 12 | — | — | 0.91 in (2008) |
| January 13 | — | — | 1.39 in (2023) |
| January 14 | — | — | 0.70 in (2002) |
| January 15 | — | — | 1.04 in (2006) |
| January 16 | — | — | 0.59 in (2007) |
| January 17 | — | — | 0.60 in (2016) |
| January 18 | — | — | 1.53 in (1994) |
| January 19 | — | — | 1.00 in (2011) |
| January 20 | — | — | 0.80 in (2023) |
| January 21 | — | — | 1.73 in (1995) |
| January 22 | — | — | 0.60 in (2011) |
| January 23 | — | — | 0.95 in (2023) |
| January 24 | — | — | 1.75 in (1998) |
| January 25 | — | — | 1.05 in (2019) |
| January 26 | — | — | 1.83 in (2023) |
| January 27 | — | — | 1.12 in (2012) |
| January 28 | — | — | 1.73 in (1996) |
| January 29 | — | — | 0.67 in (2024) |
| January 30 | — | — | 0.82 in (2019) |
| January 31 | — | — | 0.47 in (2001) |