Southampton weather forecast
UK towns · Hampshire, England · 50.91°N 1.40°W
Southampton, in Hampshire, England, has its warmest weather in August, when daytime temperatures average 21.9°C, while January nights are the coldest at around 2.4°C. The town sees roughly 961mm of rain a year; October is normally the wettest month and April the driest. Figures are averaged from 2020–2024 observations.
Climate averages
| Month | Avg high | Avg low | Rain | Rain days |
|---|---|---|---|---|
| Jan | 8.2° | 2.4° | 79mm | 12 |
| Feb | 10.1° | 4.2° | 86mm | 14 |
| Mar | 11.1° | 4.5° | 84mm | 14 |
| Apr | 13.8° | 5.1° | 57mm | 10 |
| May | 17.2° | 8.4° | 69mm | 12 |
| Jun | 20.4° | 11.6° | 57mm | 10 |
| Jul | 21.5° | 13.4° | 63mm | 12 |
| Aug | 21.9° | 13.9° | 68mm | 10 |
| Sep | 19.9° | 11.9° | 83mm | 11 |
| Oct | 15.9° | 9.9° | 131mm | 16 |
| Nov | 11.8° | 6.1° | 90mm | 12 |
| Dec | 9.3° | 4.6° | 94mm | 13 |
Seasons in Southampton
Spring (March–May). Daytime highs in Southampton climb from 11.1°C in March to 17.2°C by May, while nights ease from 4.5°C to 8.4°C. The season brings around 210mm of rain in total.
Summer (June–August). The warmest stretch of the year: afternoons average 21.3°C, peaking in August at 21.9°C. June is usually the driest of the summer months (57mm over ~10 rainy days). Around the June solstice, Southampton gets roughly 16.3 hours of daylight.
Autumn (September–November). Daytime temperatures fall from 19.9°C in September to 11.8°C by November, and rainfall builds to its annual peak — October is the wettest month of the year (131mm).
Winter (December–February). Nights average 3.7°C, with January the coldest month (average low 2.4°C, daytime high 8.2°C). Expect about 39 days with measurable rain over the three months, and only around 7.7 hours of daylight in mid-December.
How Southampton compares
| Southampton | UK town average | |
|---|---|---|
| Annual rainfall | 961mm | 1054mm |
| Rainy days per year | 146 | 167 |
| Summer daytime high | 21.3°C | 19.7°C |
| Winter night low | 3.7°C | 3.4°C |
Southampton is about 9% drier than the average for the 121 UK towns tracked on this site (1054mm), based on 2020–2024 monthly normals.
Southampton weather FAQs
What is the warmest month in Southampton?
August is typically the warmest month in Southampton, with average daytime highs of 21.9°C. Summer afternoons (June–August) average around 21.3°C.
What is the wettest month in Southampton?
October is usually the wettest month, with around 131mm of rain over roughly 16 rainy days. April is typically the driest (57mm).
How much does it rain in Southampton per year?
Southampton receives roughly 961mm of precipitation per year, spread over about 146 days with at least 1mm of rain (based on 2020–2024 observations).
How cold are winters in Southampton?
Winter nights (December–February) in Southampton average around 3.7°C, with January typically the coldest month (average low 2.4°C).
When is the best time to visit Southampton for good weather?
Late spring and summer offer the most reliable weather in Southampton. June is typically the driest of the warm months (57mm of rain), while August is the warmest, averaging 21.9°C by day — and near the June solstice there are around 16 hours of daylight to enjoy.
How does Southampton's weather compare with the rest of the UK?
Southampton receives 961mm of rain a year, about 9% drier than the average for the 121 UK towns tracked on this site (1054mm). Summer daytime highs average 21.3°C against a UK-town average of 19.7°C, and winter nights average 3.7°C versus 3.4°C.
Is it going to rain in Southampton?
For up-to-the-minute rain tracking, check the live rain radar — as a long-term guide, Southampton averages 146 rainy days a year, with October the wettest month (131mm) and April the driest (57mm).
What is the 7-day forecast for Southampton?
See the live hourly and 7-day forecast for day-by-day temperatures and rain chance. The figures on this page are long-term climate averages from 2020–2024, not the live forecast.