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Weather extremes

How extreme does Fredericton's weather get?

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

Based on 26 years of daily weather observations (2000–present), from the Fredericton Cda Cs station 5 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 Fredericton has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
96°F Jun 19, 2020

That is about 24°F hotter than a normal June afternoon in Fredericton (typical high near 72°F).

The three most extreme on record

1 96°F Jun 19, 2020
2 95°F Aug 11, 2025
3 95°F Aug 12, 2025
❄️ Coldest night
-31°F Jan 16, 2009

About 38°F colder than a normal January night in Fredericton (typical low near 7°F).

The three most extreme on record

1 -31°F Jan 16, 2009
2 -27°F Jan 26, 2009
3 -23°F Jan 15, 2009
🌧️ Most rain in one day
5.39 in Sep 30, 2015

More rain in a single day than Fredericton usually gets in the whole month of September (typical September total about 3.5 in).

The three most extreme on record

1 5.39 in Sep 30, 2015
2 4.20 in Jul 26, 2013
3 4.00 in Dec 13, 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.

-50°-30°-10°10°30°50°70°90°110° all-time high 96°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Fredericton's record heat sits well above even a hot day for the season — June's 96°F is about 24°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, Fredericton's warmest days reach the high 70s°F and its coldest nights drop to the high 0s°F. But across the record it has gone as high as 96°F and as low as −31°F. A single day has delivered over 5 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 23 years of daily observations at Mactaquac Prov Park, a weather station, about 18 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →