Weather in Portsmouth in May
In an average May, Portsmouth sees a daily high around 16°C and a low around 8°C, based on 1980–2026 of local climate records.
| Average high | 16°C |
|---|---|
| Typical high range | 12°C to 21°C |
| Average low | 8°C |
| Typical low range | 5°C to 11°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
27°C
2026-05-25
Lowest
7°C
1996-05-18
Low
Highest
19°C
2026-05-26
Lowest
-1°C
1981-05-03
Feels-like
Highest
29°C
2026-05-26
Lowest
-8°C
1981-05-03
Humidity
Highest
14.1 g/m³
2012-05-24
Lowest
4.4 g/m³
1996-05-04
Wind
Highest
49 km/h
2021-05-21
Lowest
6 km/h
2018-05-04
Gust
Highest
99 km/h
2021-05-21
Lowest
15 km/h
2010-05-20
Precip
Wettest
128 mm
2007
Driest
6 mm
2020
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