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Weather extremes

How extreme does Cowes's weather get?

The hottest, coldest, wettest and snowiest days Cowes 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 Wight: St. Catherines Point station 20 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 Cowes has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
84°F Jul 15, 2003

That is about 17°F hotter than a normal July afternoon in Cowes (typical high near 66°F).

The three most extreme on record

1 84°F Jul 15, 2003
2 83°F Jul 2, 2018
3 83°F Aug 8, 2020
❄️ Coldest night
18°F Feb 7, 1991

About 22°F colder than a normal February night in Cowes (typical low near 40°F).

The three most extreme on record

1 18°F Feb 7, 1991
2 20°F Feb 8, 1991
3 22°F Feb 10, 1991
🌧️ Most rain in one day
3.04 in May 28, 2007

More rain in a single day than Cowes usually gets in the whole month of May (typical May total about 1.6 in).

The three most extreme on record

1 3.04 in May 28, 2007
2 2.91 in Sep 9, 2002
3 2.10 in Jun 29, 2021

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 84°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Cowes's record heat sits well above even a hot day for the season — July's 84°F is about 17°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, Cowes's warmest days reach the high 60s°F and its coldest nights drop to the low 40s°F. But across the record it has gone as high as 84°F and as low as 18°F. A single day has delivered over 3 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 Wight: St. Catherines Point, a weather station, about 20 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →