How extreme does Swindon's weather get?

The hottest, coldest, wettest and snowiest days Swindon has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 34 years of daily weather observations (1991–present), from the Fairford station 14 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Swindon has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

97°F Jul 19, 2022

The three most extreme on record

1 97°F Jul 19, 2022recent

2 96°F Jul 18, 2022

3 93°F Jul 19, 2006

❄️ Coldest night

-25°F Jan 1, 2016

The three most extreme on record

1 -25°F Jan 1, 2016

2 -14°F Mar 25, 2016

3 3°F Dec 19, 2010

🌧️ Most rain in one day

12.19 in Jul 21, 2009

The three most extreme on record

1 12.19 in Jul 21, 2009

2 12.10 in Sep 26, 2014

3 10.92 in Sep 27, 2014

In plain terms

Across the record, Swindon has reached as high as 97°F and as low as −25°F. A single day has delivered over 12 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Lyneham, a weather station, about 16 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →

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