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Weather extremes

How extreme does Aalst's weather get?

The hottest, coldest, wettest and snowiest days Aalst 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 Uccle station 27 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 Aalst has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
103°F Jul 25, 2019

That is about 29°F hotter than a normal July afternoon in Aalst (typical high near 74°F).

The three most extreme on record

1 103°F Jul 25, 2019
2 98°F Jul 31, 2020
3 97°F Jul 19, 2006
❄️ Coldest night
3°F Jan 8, 1985

About 31°F colder than a normal January night in Aalst (typical low near 34°F).

The three most extreme on record

1 3°F Jan 8, 1985
2 4°F Jan 9, 1985
3 7°F Jan 1, 1979
🌧️ Most rain in one day
2.36 in Aug 23, 2011

About 73% of a typical August's rain in a single day (Aalst averages roughly 3.2 in across the month).

The three most extreme on record

1 2.36 in Aug 23, 2011
2 2.32 in Jul 15, 2021
3 2.25 in Aug 16, 2010

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 103°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Aalst's record heat sits well above even a hot day for the season — July's 103°F is about 29°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, Aalst'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 103°F and as low as 3°F. A single day has delivered over 2 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 28 years of daily observations at Uccle, a weather station, about 27 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →