Southampton Climate by Month
Southampton, England, United Kingdom
Mild summers and cool winters, with rain spread through the year.
The climate in Southampton is one of mild summers and cool winters, with rain spread through the year. Expect highs of 73°F (23°C) in July and 48°F (9°C) in January, with the coldest nights (February) near 38°F (3°C). About 32 in (802 mm) of rain falls in a typical year, with no clear rainy season. The air is humid, averaging 78% relative humidity.
- Warmest month
- 73°F(23°C)
- Average high, July
- Coldest nights
- 38°F(3°C)
- Average low, February
- Rain per year
- 32 in(802 mm)
- No clear rainy season
- Humidity
- 78%
- Sunniest: June
Best and worst months in Southampton
Best for weatherJuly and August are the best time for weather in Southampton: highs near 73°F (23°C) and about 2.0 in (52 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 48°F (9°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in July.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Southampton weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 48°F(9°C) | 38°F(3°C) | 3.3 in(83 mm) | 84% | 0.8 |
| FebFebruary | 48°F(9°C) | 38°F(3°C) | 2.4 in(61 mm) | 85% | 1.4 |
| MarMarch | 53°F(12°C) | 40°F(4°C) | 2.0 in(52 mm) | 75% | 2.6 |
| AprApril | 58°F(15°C) | 43°F(6°C) | 2.0 in(51 mm) | 72% | 3.8 |
| MayMay | 64°F(18°C) | 48°F(9°C) | 1.9 in(48 mm) | 72% | 4.8 |
| JunJune | 69°F(21°C) | 53°F(12°C) | 2.2 in(56 mm) | 71% | 5.2 |
| JulJulyBest | 73°F(23°C) | 57°F(14°C) | 1.7 in(44 mm) | 72% | 5.0 |
| AugAugustBest | 72°F(22°C) | 57°F(14°C) | 2.3 in(59 mm) | 72% | 4.2 |
| SepSeptember | 67°F(20°C) | 53°F(11°C) | 2.4 in(61 mm) | 79% | 3.1 |
| OctOctober | 60°F(16°C) | 47°F(9°C) | 3.7 in(94 mm) | 85% | 1.8 |
| NovNovember | 53°F(12°C) | 42°F(6°C) | 4.1 in(103 mm) | 88% | 0.9 |
| DecDecember | 49°F(10°C) | 39°F(4°C) | 3.5 in(90 mm) | 82% | 0.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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