Swindon, United Kingdom Climate & Monthly Averages
Swindon has an oceanic climate. July is the hottest month, averaging 70° by day; January is the coldest at 45°.
How weather changes through the year in Swindon
Swindon averages 51°F (10°C) across the year, with 7.3 hours of sunshine a day and 32.0 inches (812 mm) of precipitation. The spread runs from January, at 45°F (7°C), to July, at 70°F (21°C).
Swindon climate quick facts
- Hottest month: July - highs near 70°F (21°C)
- Coldest month: January - highs near 45°F (7°C)
- Decade extremes (2015-2024): 95°F (35°C) high · 13°F (-10°C) low
- Wettest month: October (12 rainy days) · Sunniest: June (11.0 h sun/day)
- Climate type: oceanic
- Annual swing: 13°C between the average warmest and coolest month · day to night: 7°C
- Snow: about 2 days a year
- Average humidity: 81%
Temperatures, rain and sunshine
July is the warm end of the year, averaging 70°F (21°C) by day and 56°F (13°C) overnight. January sits at the other end of the year: 45°F (7°C) by day, 35°F (2°C) at night. June is the brightest month at 11.0 hours of sun a day, against an annual average of 7.3 - duller than all but 4% of the 3496 cities in our dataset.
Relative humidity averages 81% across the year, more humid than roughly 88% of the cities we track. Four of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is June through September. The gridded 2015-2024 daily record for this location tops out at 95°F (35°C) and bottoms at 13°F (-10°C) - decade extremes, not all-time station records.
Where Swindon sits among other climates
- 29% of the year's precipitation falls in its wettest three months - more evenly spread than all but 9% of the 3496 cities we track.
These comparisons use the same ten-year window for every city in the dataset.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 45° | 35° | 12 | 2.5 in | 4.1 h/day | 8.3 h | 39% | 88% |
| February | 47° | 37° | 11 | 2.4 in | 5.0 h/day | 9.9 h | 39% | 84% |
| March | 50° | 38° | 14 | 2.9 in | 6.5 h/day | 11.7 h | 45% | 82% |
| April | 55° | 40° | 9 | 1.8 in | 9.2 h/day | 13.8 h | 31% | 76% |
| May | 61° | 46° | 11 | 2.6 in | 10.4 h/day | 15.6 h | 36% | 76% |
| June | 67° | 52° | 11 | 2.3 in | 11.0 h/day | 16.6 h | 36% | 75% |
| July | 70° | 56° | 11 | 2.6 in | 10.9 h/day | 16.2 h | 37% | 73% |
| August | 69° | 55° | 12 | 2.7 in | 9.5 h/day | 14.6 h | 37% | 77% |
| September | 65° | 51° | 11 | 2.8 in | 8.0 h/day | 12.6 h | 38% | 80% |
| October | 58° | 47° | 12 | 3.3 in | 5.9 h/day | 10.5 h | 40% | 85% |
| November | 50° | 41° | 12 | 2.9 in | 4.4 h/day | 8.8 h | 41% | 88% |
| December | 47° | 39° | 14 | 3.1 in | 3.2 h/day | 7.8 h | 45% | 90% |
Swindon month by month
Each card shows the average high and low. The bar places that month between Swindon's coldest night and warmest afternoon.
January
- Rain
- 12 days
- Sunshine
- 4.1 h
- Daylight
- 8.3 h
February
- Rain
- 11 days
- Sunshine
- 5.0 h
- Daylight
- 9.9 h
March
- Rain
- 14 days
- Sunshine
- 6.5 h
- Daylight
- 11.7 h
April
- Rain
- 9 days
- Sunshine
- 9.2 h
- Daylight
- 13.8 h
May
- Rain
- 11 days
- Sunshine
- 10.4 h
- Daylight
- 15.6 h
June
- Rain
- 11 days
- Sunshine
- 11.0 h
- Daylight
- 16.6 h
July
- Rain
- 11 days
- Sunshine
- 10.9 h
- Daylight
- 16.2 h
August
- Rain
- 12 days
- Sunshine
- 9.5 h
- Daylight
- 14.6 h
September
- Rain
- 11 days
- Sunshine
- 8.0 h
- Daylight
- 12.6 h
October
- Rain
- 12 days
- Sunshine
- 5.9 h
- Daylight
- 10.5 h
November
- Rain
- 12 days
- Sunshine
- 4.4 h
- Daylight
- 8.8 h
December
- Rain
- 14 days
- Sunshine
- 3.2 h
- Daylight
- 7.8 h
Looking for warmer alternatives? Browse warm places by month, or compare Swindon's coolest part of the year: January, February, December.
A season-by-season guide to Swindon
Spring (March through May)
Spring in Swindon runs cool rather than cold, with daytime highs averaging 56°F (13°C) and nights around 41°F (5°C); rain falls on around 34 of the 90 days.
Summer (June through August)
Summer is mild and warm here - highs near 69°F (21°C), nights near 54°F (12°C), and rain falls on around 34 of the 90 days. Daylight is generous - around 10.5 hours of sun a day.
Fall (September through November)
Through fall, Swindon runs cool rather than cold: 58°F (14°C) by day, 46°F (8°C) after dark, and rain falls on around 36 of the 90 days.
Winter (December through February)
Through winter, Swindon is brisk and cold: 47°F (8°C) by day, 37°F (3°C) after dark, and rain falls on around 37 of the 90 days.
Questions people ask about Swindon's climate
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The most useful weather window for Swindon
Best time to visit Swindon
May to September is the sweet spot for Swindon - warm days, manageable rainfall and plenty of daylight line up. Expect 67°F (19°C) in the afternoon and around 11 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in May.
What to pack
Pack for Swindon with a warm jacket and layers for the cooler season and proper waterproofs rather than an umbrella - wet days are the norm here. July nights average 56°F (13°C), so evenings rarely match the afternoons.
Swindon temperature extremes in the 2015–2024 dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.