Mt Vernon, KY Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Mt Vernon's primary NOAA station, MT VERNON.
The climate verdict for Mt Vernon
Water is the standout signal in Mt Vernon, Kentucky: 51.4 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 55°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 55°F
- average temperature, NOAA 1991-2020 normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 51.4"
- annual precipitation · 11" snow
- 189 days
- frost-free days per growing season
Mt Vernon: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00155648 · Mt Vernon, KY 55°F mean · 51.4" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-WET · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 55°F
- RANK-UPPER #4,185
- PHOTO-FINISH ≈ Paintsville
- PRCP-WET 51.4"
- SWING-MID 42°F
- COMF-MID 68/100
- LOAD-HEAT 4,600 HDD
- STN-1 USC00155648
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Paintsville, KY (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every KY station list.
- Mt Vernon (this station) 55°F
- Hot Greenwood, DE 55°F
- Near Paintsville, KY 55°F
- Near Wantagh Cedar C…, NY 55°F
- Near Mcdaniels, KY 55°F
Climate Living Index · Mt Vernon
Mt Vernon: 61/100 · grade C
Mt Vernon publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Mt Vernon, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 99 calendar days | 76/100 · B |
| Snowfall burden | 10.9 inches/year | 62/100 · C |
| Annual temperature balance | 55.3°F · 12.2° from 67.5°F | 60/100 · C |
| Frost-free season | 189 days/year | 56/100 · C |
| Precipitation balance | 51.4 in · 16.4 from 35 in | 42/100 · D |
Mt Vernon · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Mt Vernon is a temperate Köppen climate: Cfa
Coldest-month mean 33.4°F and warmest-month mean 75.2°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 75.2°F
- Coldest month
- 33.4°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Mt Vernon sits across the climate record
Three NOAA fields for Mt Vernon's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 61st percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 16% wettest
- Mt Vernon's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 43rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Mt Vernon compares across U.S. station-mapped locations
Mt Vernon's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Mt Vernon's measured station temperature trend
MethodologyAcross 51 complete annual observations from 1957 to 2015, MT VERNON warmed at a fitted rate of 0.07°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Mt Vernon primary station fitted change +0.07 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 42°F (6°C) | 25°F (-4°C) | 33°F (1°C) | 4.2" | 3.1" | 23.8 | 0.0 |
| February | 47°F (8°C) | 27°F (-3°C) | 37°F (3°C) | 4.0" | 4.0" | 20.9 | 0.0 |
| March | 56°F (13°C) | 35°F (1°C) | 45°F (7°C) | 4.9" | 2.0" | 14.3 | 0.0 |
| April | 67°F (19°C) | 44°F (7°C) | 55°F (13°C) | 4.8" | 0.0" | 4.3 | 0.0 |
| May | 75°F (24°C) | 54°F (12°C) | 64°F (18°C) | 4.9" | 0.0" | 0.2 | 0.2 |
| June | 82°F (28°C) | 62°F (17°C) | 72°F (22°C) | 4.8" | 0.0" | 0.0 | 1.5 |
| July | 84°F (29°C) | 66°F (19°C) | 75°F (24°C) | 4.6" | 0.0" | 0.0 | 4.1 |
| August | 84°F (29°C) | 64°F (18°C) | 74°F (23°C) | 3.6" | 0.0" | 0.0 | 5.2 |
| September | 79°F (26°C) | 57°F (14°C) | 68°F (20°C) | 3.5" | 0.0" | 0.0 | 2.3 |
| October | 69°F (20°C) | 45°F (7°C) | 57°F (14°C) | 3.6" | 0.0" | 3.8 | 0.1 |
| November | 56°F (13°C) | 35°F (2°C) | 46°F (8°C) | 3.5" | 0.2" | 13.1 | 0.0 |
| December | 46°F (8°C) | 29°F (-2°C) | 38°F (3°C) | 4.9" | 1.6" | 20.4 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 85°F around July 7, short of 90°F on every date, while 99 dates carry a normal low at or below freezing, the coldest 24°F near January 23.
The freezing stretch
The normal low stays at or below 32°F into March 5, then returns to freezing around November 28, covering 99 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is December 24, when 42% of years recorded at least a hundredth of an inch. The driest is September 4 at 26%. Summed across the calendar, that is about 131 wet dates a year.
The widest day
October 13 carries the biggest normal gap between afternoon and dawn, 24°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Mt Vernon.
Where Mt Vernon Stands Nationally
The normal water year runs well above the national norm at roughly 51 inches.
Mt Vernon earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 3.1"
12.4 days with precipitation
Snow: 4.0"
10.2 days with precipitation
Snow: 2.0"
12.6 days with precipitation
11.8 days with precipitation
12.6 days with precipitation
11.2 days with precipitation
11.7 days with precipitation
8.8 days with precipitation
8.2 days with precipitation
8.7 days with precipitation
Snow: 0.2"
10.0 days with precipitation
Snow: 1.6"
12.8 days with precipitation
Mt Vernon spreads its precipitation across the year
Neither half of the year dominates here: June through August take 25% of the annual total and December through February 26%, with neither reaching the 35% that would mark a distinct wet season. Mt Vernon has no dry season to plan around, though it does carry a 41.8°F seasonal spread.
The gap between the wettest and driest month still matters: December averages 4.9" and November 3.5". The three wettest months together take 29% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Mt Vernon, it arrives in quantity
51.3" of precipitation falls across only about 131 wet days here, averaging 0.39 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 131 a year, 36% of all days
- Average depth per wet day
- 0.39 inches
- Most wet days
- December, about 13
- Fewest wet days
- September, about 8
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Snow reaches Mt Vernon, but rarely amounts to much
The normals record 10.9 inches of snow a year here, most likely in February. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 7 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
October 24
50% probability date
Last Spring Freeze
April 18
50% probability date
Growing Season
189 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,600
Higher = more heating needed
Cooling Degree Days
1,100
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside KY closest to Mt Vernon on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (55°F here).
- Clinton, MO 55°F · 0.0°F off
- Eureka, KS 55°F · 0.0°F off
- Fort Leonard Wood, MO 55°F · 0.0°F off
- Gatlinburg, TN 55°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (51.4" here), excluding temperature-peer places.
- Marshall, TX 51.3" · 0.0" off
- Huntsville, TX 51.3" · 0.0" off
- Sanford, ME 51.3" · 0.0" off
- Tell City, IN 51.3" · 0.1" off
Data-derived climate profile
How Mt Vernon's climate pattern fits together
heating led · wet · mid swing
Mt Vernon's energy balance leans toward cold weather: 4,600 annual heating degree days against 1,100 for cooling. Its 41.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Mt Vernon's frost-free season lasts about 189 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Mt Vernon's middle-range seasonal profile. The measured spread is 41.8°F. The annual average is 55°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Mt Vernon carries 51.4 inches of precipitation in a normal year, inside PlainClimate's wet range. Annual snowfall totals 10.9 inches. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Mt Vernon's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Mt Vernon, not an official NOAA class or a year-ahead forecast.
Questions about Mt Vernon's climate
How much rain does Mt Vernon get? ▼
How cold does Mt Vernon get in winter? ▼
How much energy does heating and cooling require in Mt Vernon? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Mt Vernon's primary station: MT VERNON (USC00155648). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Mt Vernon; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Mt Vernon comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.