Portsmouth, England, United Kingdom climate
Average temperatures, precipitation and all-time records for Portsmouth, England, United Kingdom, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is August, averaging a high of 19°C, and its coldest is February, with an average low of 5°C.
Portsmouth is a port city and unitary authority in Hampshire, England. Most of Portsmouth is located on Portsea Island, off the south coast of England in the Solent, making Portsmouth the only city in England not located primarily on the mainland. via Wikipedia
How today compares
Latest recorded day: 2026-07-24. Each reading placed on Portsmouth, England, United Kingdom's own ±7-day seasonal distribution.
Portsmouth average temperatures by month
Typical daily high and low, and average precipitation, for each month in Portsmouth, England, United Kingdom, based on 1980–2026 records. The wettest month is January (3 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 8°C | 5°C | 3 mm |
| February | 8°C | 5°C | 3 mm |
| March | 9°C | 6°C | 3 mm |
| April | 11°C | 7°C | 3 mm |
| May | 14°C | 10°C | 3 mm |
| June | 17°C | 13°C | 3 mm |
| July | 19°C | 15°C | 3 mm |
| August | 19°C | 15°C | 3 mm |
| September | 18°C | 14°C | 3 mm |
| October | 15°C | 11°C | 3 mm |
| November | 11°C | 8°C | 3 mm |
| December | 9°C | 6°C | 3 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 34°C on 2026-06-24
- Coldest day on record: -6°C on 1987-01-13
Percentiles compare each day to Portsmouth, England, United Kingdom's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →