Weather in Portsmouth in May
In an average May, Portsmouth sees a daily high around 14°C and a low around 10°C, based on 1980–2026 of local climate records.
| Average high | 14°C |
|---|---|
| Typical high range | 12°C to 17°C |
| Average low | 10°C |
| Typical low range | 7°C to 12°C |
| Average daily precipitation | 3 mm |
May records
The most extreme May on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total May accumulation.
High
Highest
29°C
2026-05-26
Lowest
8°C
1996-05-17
Low
Highest
15°C
2018-05-29
Lowest
2°C
2026-05-11
Feels-like
Highest
33°C
2026-05-26
Lowest
-3°C
1981-05-03
Humidity
Highest
13.3 g/m³
2026-05-28
Lowest
4.8 g/m³
1987-05-04
Wind
Highest
59 km/h
2021-05-03
Lowest
8 km/h
2008-05-31
Gust
Highest
95 km/h
2021-05-21
Lowest
12 km/h
2008-05-31
Precip
Wettest
133 mm
2007
Driest
6 mm
2020
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