Weather in Portsmouth in August
In an average August, Portsmouth sees a daily high around 19°C and a low around 15°C, based on 1980–2026 of local climate records.
| Average high | 19°C |
|---|---|
| Typical high range | 17°C to 22°C |
| Average low | 15°C |
| Typical low range | 13°C to 17°C |
| Average daily precipitation | 3 mm |
August records
The most extreme August on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total August accumulation.
High
Highest
28°C
1990-08-04
Lowest
15°C
1986-08-03
Low
Highest
21°C
2020-08-12
Lowest
9°C
1986-08-29
Feels-like
Highest
30°C
1990-08-04
Lowest
6°C
1986-08-29
Humidity
Highest
16.2 g/m³
2003-08-12
Lowest
7.2 g/m³
2012-08-31
Wind
Highest
57 km/h
2019-08-10
Lowest
7 km/h
1981-08-04
Gust
Highest
95 km/h
1992-08-30
Lowest
15 km/h
2017-08-26
Precip
Wettest
140 mm
2015
Driest
6 mm
1995
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