Swindon climate
Swindon (England, United Kingdom) has a temperate oceanic climate (Köppen Cfb). The average temperature over the year is 10 °C50 °F, and about 806 mm32 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Swindon climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 744 | 235 | 439 | 763.0 | 11 |
| Feb | 745 | 134 | 439 | 612.4 | 10 |
| Mar | 949 | 236 | 642 | 592.3 | 8 |
| Apr | 1355 | 439 | 947 | 522.0 | 2 |
| May | 1662 | 745 | 1253 | 612.4 | 0 |
| Jun | 2067 | 1050 | 1559 | 612.4 | 0 |
| Jul | 2272 | 1254 | 1763 | 672.6 | 0 |
| Aug | 2271 | 1253 | 1762 | 702.7 | 0 |
| Sep | 1966 | 949 | 1458 | 502.0 | 0 |
| Oct | 1558 | 745 | 1152 | 833.3 | 1 |
| Nov | 1050 | 440 | 745 | 863.4 | 4 |
| Dec | 745 | 236 | 541 | 823.2 | 9 |
| Year | 2272 | 134 | 1050 | 80632 | 45 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 95% | 75% | 0.8 | 8:18 |
| Feb | 93% | 75% | 1.5 | 9:53 |
| Mar | 89% | 73% | 2.6 | 11:42 |
| Apr | 85% | 68% | 4.0 | 13:48 |
| May | 82% | 71% | 4.9 | 15:36 |
| Jun | 80% | 72% | 5.3 | 16:37 |
| Jul | 77% | 69% | 5.1 | 16:12 |
| Aug | 78% | 72% | 4.2 | 14:36 |
| Sep | 81% | 68% | 3.2 | 12:33 |
| Oct | 88% | 73% | 1.9 | 10:33 |
| Nov | 94% | 75% | 1.0 | 8:45 |
| Dec | 95% | 76% | 0.7 | 7:51 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Swindon is like
The warmest month is July, with an average high of 22 °C72 °F and a low of 12 °C54 °F. The coldest is February, when highs average 7 °C45 °F and lows 1 °C34 °F. There is a clear seasonal cycle, with 13 °C23.4 °F between the average temperature of the warmest and the coolest month.
Annual precipitation is moderate at about 806 mm32 in. Rain is spread fairly evenly through the year. The wettest month is November (86 mm3.4 in), the driest is September (50 mm2.0 in).
Relative humidity ranges from 77% in July to 95% in December. The clearest skies (lowest average cloud amount, 68%) are typical of September. Average wind speed near the ground ranges from 10 km/h (6 mph) in June to 14 km/h (8 mph) in January. Daylight lasts from about 7.8 hours in December to 16.6 hours in June.
Best time to visit Swindon
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September: average highs of 19 °C66 °F to 22 °C72 °F with 50 mm2.0 in to 70 mm2.7 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 7 °C44 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Swindon
- Winter (December–February) — highs around 7 °C44 °F, lows 134 to 2 °C36 °F, about 73 mm2.9 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Spring (March–May) — highs 949 to 16 °C62 °F, lows 236 to 7 °C45 °F, about 57 mm2.2 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Summer (June–August) — highs 2067 to 22 °C72 °F, lows 1050 to 12 °C54 °F, about 66 mm2.6 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket.
- Autumn (September–November) — highs 1050 to 19 °C66 °F, lows 440 to 9 °C49 °F, about 73 mm2.9 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How Swindon compares
Compared with Reading, about 57 km to the east, Swindon is on average 0.5 °C0.8 °F cooler and receives 7% more precipitation (806 mm32 in vs 752 mm30 in). The difference is largest in July (0.7 °C1.3 °F cooler).
Of the 66 places in the United Kingdom covered by World Climates, Swindon is the 38th warmest by annual mean temperature and the 31st wettest by annual precipitation. See all of them on the United Kingdom climate page.
Places in other countries with the most similar temperature and rainfall pattern: Brugge (Belgium, Cfb), Leeuwarden (The Netherlands, Cfb) and Amsterdam (The Netherlands, Cfb).
Nearby places
- Oxford 42 km · 10 °C50 °F · 734 mm29 in
- Cheltenham 43 km · 10 °C50 °F · 791 mm31 in
- Gloucester 47 km · 10 °C51 °F · 772 mm30 in
- Reading 57 km · 10 °C51 °F · 752 mm30 in
- Bristol 58 km · 11 °C51 °F · 811 mm32 in
- Basingstoke 58 km · 10 °C50 °F · 752 mm30 in
- Worcester 76 km · 10 °C50 °F · 772 mm30 in
- Southampton 77 km · 11 °C52 °F · 779 mm31 in
Frequently asked questions
What is the warmest month in Swindon?
July is the warmest month in Swindon, with an average high of 22 °C (72 °F) and an average low of 12 °C (54 °F).
What is the coldest month in Swindon?
February is the coldest month, with an average high of 7 °C (45 °F) and an average low of 1 °C (34 °F).
When does it rain the most in Swindon?
November is the wettest month with about 86 mm (3.4 in) of precipitation; September is the driest with about 50 mm (2.0 in).
What is the best time to visit Swindon?
Judging by long-term averages, the most comfortable months are June–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.