How extreme does Mount Vernon's weather get?

The hottest, coldest, wettest and snowiest days Mount Vernon 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 Ny City Cntrl Park station 19 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 Mount Vernon has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

104°F Jul 21, 1977

That is about 19°F hotter than a normal July afternoon in Mount Vernon (typical high near 85°F).

The three most extreme on record

1 104°F Jul 21, 1977

2 104°F Jul 22, 2011

3 103°F Aug 9, 2001

❄️ Coldest night

-2°F Jan 17, 1977

About 30°F colder than a normal January night in Mount Vernon (typical low near 28°F).

The three most extreme on record

1 -2°F Jan 17, 1977

2 -2°F Jan 21, 1985

3 -2°F Jan 19, 1994

🌧️ Most rain in one day

7.57 in Apr 15, 2007

More rain in a single day than Mount Vernon usually gets in the whole month of April (typical April total about 4.1 in).

The three most extreme on record

1 7.57 in Apr 15, 2007

2 7.40 in Nov 8, 1977

3 7.13 in Sep 1, 2021

⛄ Most snow in one day

27.3 in Jan 23, 2016

Close to a whole typical January's snow in one day (Mount Vernon averages about 9 in across the month).

The three most extreme on record

1 27.3 in Jan 23, 2016

2 24.1 in Feb 12, 2006

3 16.3 in Feb 17, 2003

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.

normal range of daily temperatureshottest ever recordedcoldest ever recorded

Mount Vernon's record heat sits well above even a hot day for the season — July's 104°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, Mount Vernon's warmest days reach the mid-80s°F and its coldest nights drop to the high 20s°F. But across the record it has gone as high as 104°F and as low as −2°F. A single day has delivered over 8 inches of rain or close to 27 inches of snow. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Laguardia AP (NOAA GHCN station USW00014732), about 15 km from the city centre.

How we build these numbers →

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