Weather in Portsmouth, England, United Kingdom in September
In an average September, Portsmouth sees a daily high around 20°C and a low around 11°C, based on 1981–2026 of local climate records.
| Average high | 20°C |
|---|---|
| Typical high range | 17°C to 23°C |
| Average low | 11°C |
| Typical low range | 8°C to 14°C |
| Average daily precipitation | 3 mm |
September records
The most extreme September on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
31°C
2023-09-09
Lowest
11°C
1986-09-15
Low
Highest
19°C
2023-09-09
Lowest
4°C
1988-09-30
Feels-like
Highest
35°C
2023-09-07
Lowest
0°C
1993-09-26
Humidity
Highest
16.4 g/m³
2023-09-10
Lowest
6.5 g/m³
2003-09-24
Wind
Highest
60 km/h
1983-09-02
Lowest
6 km/h
2023-09-08
Precip
Wettest
140 mm
2024
Driest
14 mm
2003
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