Climateby Month

Louisville, KY climate by month

NOAA 1991-2020 normals · 519 ft elevation

Louisville has hot and oppressively humid summers and chilly winters. Highs peak at 89°F in July and fall to 44°F in January. Wet days are spread through the year, from about 8 to 13 a month. Normal snowfall is about 13 in a year. By our comfort score the best months are April, May and October.

Warmest month
89°F
July normal high
Coldest month
28°F
January normal low
Wet days a year
124
48.3 in of precipitation
Snow a year
13.4 in
normal snowfall

How warm is Louisville?

Normal highs range from 44°F in January to 89°F in July.

20°40°60°80°100° January: normal high 44°F (7°C), low 28°F (-2°C) 44° 28° February: normal high 48°F (9°C), low 31°F (-1°C) March: normal high 58°F (14°C), low 39°F (4°C) April: normal high 70°F (21°C), low 49°F (9°C) May: normal high 78°F (26°C), low 59°F (15°C) June: normal high 86°F (30°C), low 67°F (19°C) July: normal high 89°F (32°C), low 71°F (22°C) 89° 71° August: normal high 88°F (31°C), low 70°F (21°C) September: normal high 82°F (28°C), low 62°F (17°C) October: normal high 71°F (22°C), low 50°F (10°C) November: normal high 58°F (14°C), low 39°F (4°C) December: normal high 47°F (8°C), low 32°F (0°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Louisville?

May has the most wet days (about 13); the year brings about 48 in of precipitation.

January: 11 wet days February: 10 wet days March: 12 wet days April: 12 wet days May: 13 wet days 13 June: 11 wet days July: 10 wet days August: 8 wet days September: 8 wet days 8 October: 8 wet days November: 10 wet days December: 12 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 13.4 in a year, most of it in January.

January: 4.5 in of snow 4.5 February: 4.1 in of snow March: 2.1 in of snow April: 0.1 in of snow May: 0.0 in of snow 0.0 June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.1 in of snow November: 0.3 in of snow December: 2.2 in of snow JFMAMJJASOND

How humid is Louisville?

Muggy days peak in July, at about 21 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 5 muggy days June: 15 muggy days July: 21 muggy days 21 August: 18 muggy days September: 7 muggy days October: 1 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Louisville Intl-Standiford Field Airport, 4.5 mi W of the city center.

How much daylight?

Daylight ranges from about 9.6 hours in December to 14.8 hours in June.

January: 9.9 hours of daylight February: 10.8 hours of daylight March: 12.0 hours of daylight April: 13.2 hours of daylight May: 14.3 hours of daylight June: 14.8 hours of daylight 14.8 July: 14.5 hours of daylight August: 13.6 hours of daylight September: 12.4 hours of daylight October: 11.2 hours of daylight November: 10.1 hours of daylight December: 9.6 hours of daylight 9.6 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Louisville, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 44°F28°F 3.4 in11 4.5 in 0 9.9 h
February 48°F31°F 3.4 in10 4.1 in 0 10.8 h
March 58°F39°F 4.6 in12 2.1 in 0 12.0 h
April 70°F49°F 4.8 in12 0.1 in 0 13.2 h
May 78°F59°F 5.2 in13 0.0 in 5 14.3 h
June 86°F67°F 4.3 in11 0.0 in 15 14.8 h
July 89°F71°F 4.0 in10 0.0 in 21 14.5 h
August 88°F70°F 3.7 in8 0.0 in 18 13.6 h
September 82°F62°F 3.7 in8 0.0 in 7 12.4 h
October 71°F50°F 3.7 in8 0.1 in 1 11.2 h
November 58°F39°F 3.4 in10 0.3 in 0 10.1 h
December 47°F32°F 4.1 in12 2.2 in 0 9.6 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Louisville

By our comfort score, the best months are April, May and October.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 352614
Feb 42369
Mar 55983
Apr 691580
May 671381
Jun 52489
Jul 451714
Aug 461513
Sep 58956
Oct 661650
Nov 52862
Dec 37279

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Louisville

The last spring frost typically comes around Mar 31, and the first fall frost around Nov 7, leaving 222 frost-free days in a typical year.

Frost and freeze dates for Louisville
Typical date1 year in 10
Last spring frost (32°F)Mar 31after Apr 16
First fall frost (32°F)Nov 7before Oct 28
Last hard freeze (28°F)Mar 20after Apr 3
First hard freeze (28°F)Nov 17before Nov 4
Frost-free season222 daysunder 202 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Louisville Intl Airport (USW00093821), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Kentucky.

Hottest and coldest readings, 1991-2020

The highest reading was 106°F (July 7, 2012, and 1 other day); the lowest was -22°F (January 19, 1994).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Louisville

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Louisville Intl Airport (USW00093821), 5.0 mi WNW of the city center, 488 ft . NOAA normals and daily records, 1991-2020.
  • Cloud cover: Louisville Bowman Fld (USW00013810), 4.3 mi N of the city center, 540 ft . NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Louisville Intl-Standiford Field Airport (724230-93821), 4.5 mi W of the city center, 480 ft . Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error