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Weather extremes

How extreme does Gorseinon's weather get?

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

Based on 32 years of daily weather observations (1993–present), from the Pembry Sands station 23 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 Gorseinon has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
94°F Jul 18, 2022

That is about 26°F hotter than a normal July afternoon in Gorseinon (typical high near 67°F).

The three most extreme on record

1 94°F Jul 18, 2022recent
2 88°F Aug 3, 1995
3 88°F Jul 18, 2006
❄️ Coldest night
13°F Jan 7, 2009

About 24°F colder than a normal January night in Gorseinon (typical low near 37°F).

The three most extreme on record

1 13°F Jan 7, 2009
2 14°F Dec 25, 2010
3 14°F Jan 6, 2009
🌧️ Most rain in one day
7.68 in Apr 26, 1993

More rain in a single day than Gorseinon usually gets in the whole month of April (typical April total about 3.0 in).

The three most extreme on record

1 7.68 in Apr 26, 1993
2 4.13 in Apr 21, 1993
3 2.93 in May 15, 2013

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

-10°10°30°50°70°90°110° all-time high 94°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Gorseinon's record heat sits well above even a hot day for the season — July's 94°F is about 26°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Gorseinon's warmest days reach the high 60s°F and its coldest nights drop to the high 30s°F. But across the record it has gone as high as 94°F and as low as 13°F. A single day has delivered over 8 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 25 years of daily observations at Mumbles Head, a weather station, about 12 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →