LOUISVILLE, Kentucky — It’s hot outside. Dangerously hot. But is it the hottest it has ever been in Kentucky? Not even close — and that might come as a surprise to anyone currently sweating through this sweltering stretch.
A large heat dome continues to expand across much of the United States, pushing heat index values in Kentucky well past 105°F (40.5°C). According to the National Weather Service in Louisville, the air is so humid that it feels even warmer than the actual temperature.
Despite scattered chances for afternoon storms, much of the Bluegrass State remains under a heat advisory, with meteorologists stressing the importance of staying indoors and hydrated as temperatures climb into the upper 90s Fahrenheit (above 35°C).
But just how hot can Kentucky get? Here’s a look at the most extreme weather records ever documented in the Commonwealth.
Hottest day ever recorded in Kentucky
The most blistering day on record in Kentucky occurred on July 28, 1930, in Greenburg, a town about 82 miles south of Louisville. On that scorching Monday, thermometers registered a searing 114°F (45.5°C) — the hottest official temperature ever documented in the state, according to the National Weather Service.
That summer of 1930 marked one of the most extreme heat waves in U.S. history, occurring during the early years of the Great Depression. With no relief from modern air conditioning, that day would’ve been unimaginably brutal for residents.
What about air conditioning in 1930s Kentucky?
Back then, air conditioning was still a luxury — or more accurately, a fantasy for most families. The first patent for a residential window air conditioner was filed in 1931, but it wasn’t until 1932 that these units became commercially available.
Even then, they were priced between $10,000 and $50,000 — roughly $236,000 to $1.2 million in 2025 dollars. For most Kentuckians in the 1930s, cooling off meant sitting in the shade or sleeping on porches.
Hottest temperature ever in Louisville
The city of Louisville has reached its peak heat of 107°F (41.7°C) three times in its recorded history. These days occurred on:
- July 14, 1936
- July 28, 1930
- July 24, 1901
Each of these days is etched into the city’s meteorological history as a benchmark of extreme heat.
Other weather extremes in Kentucky
While heat often dominates the summer months, Kentucky has seen its share of other weather records that remain just as intense — if not more so — than the current stretch of hot days.
Greatest 24-hour rainfall:
Both Kentucky and Louisville experienced their wettest single day on March 1, 1997, with a remarkable 10.48 inches (266.2 mm) of rain.
Greatest 24-hour snowfall:
On December 23, 2004, Lewisport saw 20 inches (50.8 cm) of snow — the state’s highest single-day total. Louisville’s heaviest 24-hour snow was 15.5 inches (39.4 cm) on January 17, 1994.
Lowest minimum temperature:
The coldest moment in Kentucky history came on January 19, 1994, when Shelbyville hit a staggering -37°F (-38.3°C). That same day, Louisville dropped to -22°F (-30°C).
Louisville weather forecast: week of June 24, 2025
Tuesday, June 24: Mostly sunny and extremely hot, with just a 20% chance of isolated storms after 2 p.m. High near 97°F (36.1°C), low around 76°F (24.4°C). Heat index as high as 105°F (40.5°C).
Wednesday, June 25: A slight chance of storms after 11 a.m. and patchy morning fog. Otherwise sunny and oppressive, with a high of 96°F (35.5°C) and low of 75°F (23.8°C). Feels-like temps remain over 105°F.
Thursday, June 26: Continued heat and humidity, with a chance of storms in the afternoon. High near 94°F (34.4°C) and low around 76°F (24.4°C).
Friday, June 27: Expect sunshine, high heat, and a 40% chance of afternoon storms. High of 94°F (34.4°C) and low of 75°F (23.8°C).
Saturday, June 28: A 60% chance of showers and possible thunderstorms by afternoon. High near 93°F (33.8°C), low near 74°F (23.3°C).
Sunday, June 29: Thunderstorms likely under partly sunny skies. Temperatures will hover near 93°F (33.8°C) with a low around 74°F (23.3°C). Rain chances remain at 60%.
