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Weather extremes

How extreme does Ruislip's weather get?

The hottest, coldest, wettest and snowiest days Ruislip 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 Northolt station 2 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 Ruislip has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
104°F Jul 19, 2022

That is about 30°F hotter than a normal July afternoon in Ruislip (typical high near 74°F).

The three most extreme on record

1 104°F Jul 19, 2022recent
2 100°F Jul 25, 2019
3 100°F Aug 10, 2003
❄️ Coldest night
6°F Dec 20, 2010

About 30°F colder than a normal December night in Ruislip (typical low near 36°F).

The three most extreme on record

1 6°F Dec 20, 2010
2 14°F Feb 11, 2012
3 15°F Dec 13, 1991
🌧️ Most rain in one day
13.23 in Aug 22, 1992

More rain in a single day than Ruislip usually gets in the whole month of August (typical August total about 2.7 in).

The three most extreme on record

1 13.23 in Aug 22, 1992
2 7.87 in Aug 19, 1994
3 2.16 in Aug 9, 2001

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°130° all-time high 104°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Ruislip's record heat sits well above even a hot day for the season — July's 104°F is about 30°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, Ruislip's warmest days reach the mid-70s°F and its coldest nights drop to the mid-30s°F. But across the record it has gone as high as 104°F and as low as 6°F. A single day has delivered over 13 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 Northolt, a weather station, about 2 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →