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Weather extremes
How extreme does Carshalton's weather get?
The hottest, coldest, wettest and snowiest days Carshalton has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.
The four kinds of extreme
The hottest, coldest, wettest and snowiest single days Carshalton has recorded — each shown against what a normal day that time of year looks like.
That is about 28°F hotter than a normal July afternoon in Carshalton (typical high near 71°F).
The three most extreme on record
About 22°F colder than a normal February night in Carshalton (typical low near 35°F).
The three most extreme on record
About 84% of a typical December's rain in a single day (Carshalton averages roughly 3.2 in across the month).
The three most extreme on record
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.
Carshalton's record heat sits well above even a hot day for the season — July's 99°F is about 28°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
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Northolt, a weather station, about 27 km from the city centre. The underlying daily records come from NOAA's global station network.