Portsmouth weather records
Record high and low temperatures for Portsmouth, by month, by season, and all-time, with the dates they occurred, across 1980–2026 of daily climate history. Its hottest day on record reached 33°C on 2006-07-19; its coldest fell to -14°C on 1986-02-10.
Records by month
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have ever been in each calendar month, so each column shows its record high and its record low. Tap a month for its full averages and typical range.
| Month | Daytime high | Overnight low |
|---|---|---|
| January | 14°C2022-01-01
-7°C1987-01-12
|
12°C2007-01-09
-10°C1987-01-12
|
| February | 16°C2019-02-27
-6°C1991-02-07
|
12°C2004-02-03
-14°C1986-02-10
|
| March | 20°C2012-03-28
-1°C2018-03-01
|
11°C2017-03-29
-5°C1986-03-03
|
| April | 24°C2011-04-23
3°C2000-04-04
|
12°C2005-04-30
-3°C1990-04-05
|
| May | 27°C2026-05-25
7°C1996-05-18
|
19°C2026-05-26
-1°C1981-05-03
|
| June | 32°C2026-06-24
11°C1989-06-06
|
21°C2026-06-25
3°C1991-06-04
|
| July | 33°C2006-07-19
14°C1988-07-03
|
21°C2026-07-10
7°C2015-07-31
|
| August | 33°C1990-08-03
14°C1986-08-03
|
20°C2026-08-13
6°C2014-08-24
|
| September | 29°C2023-09-09
10°C1993-09-27
|
18°C2026-09-03
2°C2003-09-24
|
| October | 25°C2011-10-01
7°C2018-10-27
|
18°C2018-10-13
-3°C1983-10-30
|
| November | 17°C2005-11-02
-1°C1993-11-23
|
14°C2025-11-05
-5°C1989-11-26
|
| December | 15°C2021-12-29
-2°C1981-12-12
|
13°C2015-12-26
-11°C1981-12-12
|
Records by season
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have reached in each meteorological season (Northern Hemisphere, each a three-month span).
| Season | Daytime high | Overnight low |
|---|---|---|
| Winter (Dec–Feb) | 16°C2019-02-27
-7°C1987-01-12
|
13°C2015-12-26
-14°C1986-02-10
|
| Spring (Mar–May) | 27°C2026-05-25
-1°C2018-03-01
|
19°C2026-05-26
-5°C1986-03-03
|
| Summer (Jun–Aug) | 33°C2006-07-19
11°C1989-06-06
|
21°C2026-06-25
3°C1991-06-04
|
| Autumn (Sep–Nov) | 29°C2023-09-09
-1°C1993-11-23
|
18°C2026-09-03
-5°C1989-11-26
|
All-time records
The most extreme value Portsmouth has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Gust
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.