Mount Vernon, KY climate
Mount Vernon has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 85°, a January night drops to 25°, and about 11 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decade15° warmer than normal today. The forecast high is 88°, and a typical Oct 1 in Mount Vernon peaks around 73°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in Mount Vernon feels like
Winter
Spring
Summer
Fall
Mount Vernon weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 43° | 25° | 4.0" | 3.1" | 12 | 4 | 26° – 43° |
| February | 48° | 28° | 3.9" | 4.0" | 10 | 4 | 25° – 46° |
| March | 57° | 35° | 4.7" | 2.0" | 13 | 1 | 38° – 56° |
| April | 68° | 43° | 4.6" | 0 | 12 | 0 | 49° – 62° |
| May | 75° | 53° | 5.1" | 0 | 13 | 0 | 58° – 71° |
| June | 82° | 61° | 5.0" | 0 | 11 | 0 | 67° – 76° |
| July | 85° | 65° | 5.2" | 0 | 12 | 0 | 70° – 78° |
| August | 84° | 63° | 3.8" | 0 | 9 | 0 | 69° – 80° |
| September | 79° | 56° | 3.6" | 0 | 8 | 0 | 63° – 74° |
| October | 68° | 45° | 3.5" | 0 | 9 | 0 | 52° – 61° |
| November | 56° | 35° | 3.5" | 0.2" | 10 | 0 | 39° – 51° |
| December | 46° | 29° | 4.6" | 1.6" | 13 | 2 | 26° – 49° |
| Year | 66° | 45° | 51.5" | 10.9" | 131 | 11 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Mount Vernon
Mount Vernon gets 52 inches of rain and melted snow a year. July is the wettest month and November the driest. Rain or snow falls on about 131 days a year. Snow covers the ground about 11 days of the year.
About 189 frost-free days a year
In half of years the last 32° night comes by April 18 and the first one by October 24. That leaves about 189 frost-free days for gardens, longer than 63% of U.S. towns.
Heating and cooling a home in Mount Vernon
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Mount Vernon, 81% of that work is heating and 19% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Mount Vernon compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Mount Vernon averaged 0.6° warmer than the 1900s. The biggest change is in December (+1.4°). The shift is smaller than in 95% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Mount Vernon’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 26° to 49°. July is the most reliable, staying within 8°.
Common questions about Mount Vernon’s climate
What is the coldest month in Mount Vernon?
January, with a typical high of 43° and a low of 25°.
What is the hottest month in Mount Vernon?
July, with a typical high of 85° and a low of 65°. About 13 days a year reach 90°.
How much snow does Mount Vernon get?
About 11 inches in a normal winter, most of it in February.
When is the first frost in Mount Vernon?
In half of years the first 32° night comes by October 24, and the last spring frost by April 18.
What is the rainiest month in Mount Vernon?
July, with 5.2 inches of rain and melted snow. The year totals 52 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mount Vernon itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Mt Vernon, KY (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.