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Weather extremes

How extreme does Glasgow's weather get?

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

Based on 50+ years of daily weather observations (1971–present), from the Lynchburg Rgnl Ap station 41 km away. Updated through June 2026 — 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 Glasgow has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
103°F Jun 29, 2012

That is about 20°F hotter than a normal June afternoon in Glasgow (typical high near 83°F).

The three most extreme on record

1 103°F Jun 29, 2012
2 102°F Aug 20, 1983
3 102°F Aug 17, 1988
❄️ Coldest night
-11°F Feb 20, 2015

About 39°F colder than a normal February night in Glasgow (typical low near 28°F).

The three most extreme on record

1 -11°F Feb 20, 2015
2 -10°F Jan 21, 1985
3 -10°F Feb 5, 1996
🌧️ Most rain in one day
6.05 in Sep 6, 1996

More rain in a single day than Glasgow usually gets in the whole month of September (typical September total about 4.0 in).

The three most extreme on record

1 6.05 in Sep 6, 1996
2 6.02 in Jun 21, 1972
3 5.29 in Aug 8, 1998
Most snow in one day
14.3 in Jan 7, 1996

Close to a whole typical January's snow in one day (Glasgow averages about 4 in across the month).

The three most extreme on record

1 14.3 in Jan 7, 1996
2 12.3 in Jan 22, 1987
3 11.7 in Feb 27, 1982

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.

-30°-10°10°30°50°70°90°110°130° all-time high 103°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Glasgow's record heat sits well above even a hot day for the season — June's 103°F is about 20°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, Glasgow's warmest days reach the high 80s°F and its coldest nights drop to the mid-20s°F. But across the record it has gone as high as 103°F and as low as −11°F. A single day has delivered over 6 inches of rain or close to 14 inches of snow. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Lynchburg Rgnl AP (NOAA GHCN station USW00013733), about 41 km from the city centre.

How we build these numbers →