| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 41.1 | 23.5 | 79 | -29 | 3.1 | 3.2 |
| February | 45.0 | 25.4 | 79 | -18 | 2.9 | 0.9 |
| March | 54.8 | 32.8 | 96 | 0 | 4.1 | 0.8 |
| April | 67.2 | 42.3 | 97 | 14 | 4.1 | 0.0 |
| May | 75.7 | 52.5 | 99 | 28 | 4.6 | 0.0 |
| June | 83.3 | 61.4 | 103 | 38 | 4.1 | 0.0 |
| July | 86.4 | 65.5 | 107 | 40 | 4.5 | 0.0 |
| August | 85.8 | 63.5 | 105 | 35 | 3.2 | 0.0 |
| September | 80.3 | 56.0 | 103 | 28 | 3.0 | 0.0 |
| October | 68.9 | 44.1 | 94 | 18 | 2.9 | 0.0 |
| November | 56.2 | 33.8 | 85 | 2 | 2.8 | 0.0 |
| December | 44.9 | 27.7 | 76 | -18 | 3.3 | 0.9 |
| Entire year | 65.9 | 44.2 | 107 | -29 | 42.4 | 6.4 |
|
More Portsmouth Weather Records
1893–2024
|
||
|---|---|---|
| Highest daily low | 83 °F | July 5, 1900 |
| Lowest daily high | -1 °F | January 21, 1985 |
| Greatest daily range (Difference of high and low) |
54 °F | May 20, 1932 |
| Greatest difference in daily high over two conscutive days |
46 °F | Jan 19–20, 1996 |
| Most daily precipitation | 6.4 inches | September 27, 1976 |
| Most monthly precipitation | 14.6 inches | April 2011 |
| Most yearly precipitation | 59.9 inches | 2018 |
| Most yearly days with precipitation | 165 | 1992 |
| Earliest snow in season | October 30 | 1925 |
| Latest snow in season | April 21 | 1901 |
| Most daily snow | 18.5 inches | January 17, 1994 |
| Most monthly snow | 26.3 inches | January 1994 |
| Most yearly snow | 37.3 inches | 1960 |
| Most snow in a winter | 40.2 inches | 1959–1960 |
| Greatest snow accumulation | 22.0 inches | January 20, 1978 |
| Earliest freeze | September 24 | 1989 |
| Earliest day ≥ 90 °F | March 20 | 1894 |
| Earliest day ≥ 100 °F | June 2 | 1895 |
| Latest freeze | May 22 | 2002 |
| Latest day ≥ 90 °F | October 19 | 1924 |
| Latest day ≥ 100 °F | September 14 | 1939 |
| Most days in a year < 0 °F | 10 | 1918 |
| Most days in a year < 32 °F | 124 | 1960 |
| Most days in a year ≥ 80 °F | 156 | 1939 |
| Most days in a year ≥ 90 °F | 86 | 1936 |
| Most days in a year ≥ 100 °F | 17 | 1936 |
|
Portsmouth Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 12 days | Jul 13–24, 1948 |
| Without precipitation | 43 days | Sep 14 – Oct 26, 1963 |
| With snow | 5 days | Feb 11–15, 1970 |
| High temperature at or below freezing |
15 days | Jan 23 – Feb 6, 1966 |
| High temperature ≥ 80 °F | 94 days | May 26 – Aug 27, 1919 |
| High temperature ≥ 90 °F | 30 days | Jul 13 – Aug 11, 1916 |
| High temperature ≥ 100 °F | 7 days | Jul 9–15, 1936 |
| Years | Station | Coordinates |
|---|---|---|
| 1893–2024 | Portsmouth-Sciotoville | location |