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Weather extremes

How extreme does Hamilton's weather get?

The hottest, coldest, wettest and snowiest days Hamilton 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 L F Wade Intl Ap Kindley Fld station 12 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 Hamilton has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
93°F Aug 20, 1989

That is about 7°F hotter than a normal August afternoon in Hamilton (typical high near 86°F).

The three most extreme on record

1 93°F Aug 20, 1989
2 91°F Aug 20, 1975
3 91°F Aug 19, 1976
❄️ Coldest night
43°F Jan 2, 2009

About 17°F colder than a normal January night in Hamilton (typical low near 60°F).

The three most extreme on record

1 43°F Jan 2, 2009
2 46°F Jan 18, 1981
3 46°F Jan 5, 1989
🌧️ Most rain in one day
11.07 in Dec 15, 1996

More rain in a single day than Hamilton usually gets in the whole month of December (typical December total about 4.6 in).

The three most extreme on record

1 11.07 in Dec 15, 1996
2 7.15 in Oct 13, 2016
3 6.33 in Jun 2, 1996

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°50°70°90°110° all-time high 93°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Hamilton's record heat sits well above even a hot day for the season — August's 93°F is about 7°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, Hamilton's warmest days reach the mid-80s°F and its coldest nights drop to the high 50s°F. But across the record it has gone as high as 93°F and as low as 43°F. A single day has delivered over 11 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 24 years of daily observations at L F Wade Intl AP Kindley Fld, a weather station, about 12 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →