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Weather extremes

How extreme does Georgetown's weather get?

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

Based on 29 years of daily weather observations (1997–present), from the Hamilton Rbg Cs station 39 km away. Updated through May 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 Georgetown has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
101°F Jul 17, 2012

That is about 19°F hotter than a normal July afternoon in Georgetown (typical high near 82°F).

The three most extreme on record

1 101°F Jul 17, 2012
2 100°F Jul 21, 2011
3 99°F Aug 8, 2001
❄️ Coldest night
-17°F Feb 16, 2015

About 35°F colder than a normal February night in Georgetown (typical low near 18°F).

The three most extreme on record

1 -17°F Feb 16, 2015
2 -14°F Jan 27, 2003
3 -12°F Mar 3, 2003
🌧️ Most rain in one day
2.85 in Apr 20, 2017

About 90% of a typical April's rain in a single day (Georgetown averages roughly 3.2 in across the month).

The three most extreme on record

1 2.85 in Apr 20, 2017
2 2.48 in Jul 12, 2006
3 2.37 in Oct 19, 2011

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 101°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Georgetown's record heat sits well above even a hot day for the season — July's 101°F is about 19°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, Georgetown's warmest days reach the low 80s°F and its coldest nights drop to the high 10s°F. But across the record it has gone as high as 101°F and as low as −17°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 22 years of daily observations at Toronto Lester B. Pearson Int'l A, a weather station, about 23 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →