What is the hottest day ever recorded in Louisville?

Louisville's hottest day on record reached 106°F, set on July 30, 1999. That is the single most extreme high in the nearest long-term weather station's full daily record — about 38°F hotter than a typical year's average high of 68°F, which is why a day like it stands out as genuinely rare rather than just a hot afternoon.

What is the record high temperature in Louisville?

The all-time record high in Louisville is 106°F, recorded on July 30, 1999. Records are drawn from the nearest long-term weather station's full daily history, so this is the hottest single day the station has ever logged — not a typical summer peak.

What is the coldest day ever recorded in Louisville?

Louisville's coldest day on record bottomed out at -22°F, set on January 19, 1994. Like the record high, it comes from the station's full daily record, so it captures the most extreme cold the area has recorded rather than an average winter low.

What is the record low temperature in Louisville?

The all-time record low in Louisville is -22°F, recorded on January 19, 1994. The gap between that and the 106°F record high — a span of 128°F — is the full range of temperatures Louisville has experienced across its long-term daily record.

Is it normal to be this hot in Louisville?

It depends on how far above Louisville's normal a given day runs. A typical year here averages a daily high near 68°F; the all-time record of 106°F (set 1999) sits about 38°F above that. When a live reading is available, the live readout just below the record high and low compares it with the temperature typical for that hour this month (estimated from the month's normal high and low), so you can see how unusual the day is rather than guessing.

When did Louisville set its temperature records?

Louisville's record high of 106°F was set in 1999 (July 30, 1999), and its record low of -22°F in 1994 (January 19, 1994). Both are pulled from the station's full daily record going back to 1948, so they reflect the true extremes rather than a recent or partial sample.

Has Louisville been getting hotter?

Yes — Louisville's annual mean temperature has trended about 4.1°F warmer since 1948 (+0.54°F per decade, fitted to the complete years of 1948–2025). That gradual shift in the average is separate from the all-time records above, which mark the single most extreme days rather than the trend, but a warming baseline is part of why recent years more often brush up against the record-high end.

Louisville, Kentucky Weather Records

The hottest and coldest days Louisville has ever recorded — and how today compares to normal

Louisville’s all-time temperature records

Hottest day on record: 106°Fset July 30, 1999
Coldest day on record: -22°Fset January 19, 1994

That is a 128°F span between the hottest and coldest days Louisville has ever recorded — the full range of what its weather has done across the station’s record back to 1948.

Louisville, KY · Today vs. normal

7°F above typical for 9:45 AM on Sep 21

At 9:45 AM EDT on Sep 21 it was 74°F in Louisville — 7° above the 67°F typical for that hour (estimated from the Sep 21 normal high of 80°F and low of 60°F, interpolated from the monthly normals).

How extreme Louisville’s weather gets

Louisville’s weather is usually mild by its own standards — a typical year averages a daily high near 68°F, and the normal high for September runs about 82°F. The records sit well outside that everyday range. The hottest day on record reached 106°F in 1999 — roughly 38°F above a typical year’s average high, the kind of gap that turns an ordinary summer into a genuine heat event.

At the other end, Louisville has bottomed out at -22°F (1994). Those edges are why the today-versus-normal readout above is worth a glance: it shows where today falls between the normal and the record, so a hot afternoon can be judged against the real history rather than a hunch. A reading a few degrees over the September normal is ordinary; one pushing toward the 106°F record is the rare event the record marks.

Frequently asked

What is the hottest day ever recorded in Louisville?: Louisville's hottest day on record reached 106°F, set on July 30, 1999. That is the single most extreme high in the nearest long-term weather station's full daily record — about 38°F hotter than a typical year's average high of 68°F, which is why a day like it stands out as genuinely rare rather than just a hot afternoon.
What is the record high temperature in Louisville?: The all-time record high in Louisville is 106°F, recorded on July 30, 1999. Records are drawn from the nearest long-term weather station's full daily history, so this is the hottest single day the station has ever logged — not a typical summer peak.
What is the coldest day ever recorded in Louisville?: Louisville's coldest day on record bottomed out at -22°F, set on January 19, 1994. Like the record high, it comes from the station's full daily record, so it captures the most extreme cold the area has recorded rather than an average winter low.
What is the record low temperature in Louisville?: The all-time record low in Louisville is -22°F, recorded on January 19, 1994. The gap between that and the 106°F record high — a span of 128°F — is the full range of temperatures Louisville has experienced across its long-term daily record.
Is it normal to be this hot in Louisville?: It depends on how far above Louisville's normal a given day runs. A typical year here averages a daily high near 68°F; the all-time record of 106°F (set 1999) sits about 38°F above that. When a live reading is available, the live readout just below the record high and low compares it with the temperature typical for that hour this month (estimated from the month's normal high and low), so you can see how unusual the day is rather than guessing.
When did Louisville set its temperature records?: Louisville's record high of 106°F was set in 1999 (July 30, 1999), and its record low of -22°F in 1994 (January 19, 1994). Both are pulled from the station's full daily record going back to 1948, so they reflect the true extremes rather than a recent or partial sample.
Has Louisville been getting hotter?: Yes — Louisville's annual mean temperature has trended about 4.1°F warmer since 1948 (+0.54°F per decade, fitted to the complete years of 1948–2025). That gradual shift in the average is separate from the all-time records above, which mark the single most extreme days rather than the trend, but a warming baseline is part of why recent years more often brush up against the record-high end.