Jeffersontown, Kentucky Weather
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Climate of Jeffersontown: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), August is usually the hottest month in Jeffersontown, with average daytime highs around 30°C. January is the coolest, when nights typically fall to about -4°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 35°C, so the seasons feel very different from each other.
The area receives about 1310 mm of rain in a typical year. Most of it falls from March to July, October and December (around 64% of the yearly total), and May is the wettest month at roughly 138 mm.
For outdoor plans and travel, August to September usually offer the most comfortable weather in Jeffersontown, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 4° | -4° | 86 mm | 85% |
| Feb | 7° | -3° | 96 mm | 85% |
| Mar | 13° | 2° | 112 mm | 82% |
| Apr | 19° | 8° | 134 mm | 79% |
| May | 24° | 13° | 138 mm | 81% |
| Jun | 28° | 18° | 110 mm | 79% |
| Jul | 30° | 20° | 122 mm | 77% |
| Aug | 30° | 19° | 88 mm | 70% |
| Sep | 27° | 15° | 96 mm | 68% |
| Oct | 20° | 8° | 111 mm | 72% |
| Nov | 13° | 2° | 98 mm | 78% |
| Dec | 7° | -2° | 114 mm | 86% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Jeffersontown. Values describe typical conditions, not a forecast.
About Jeffersontown weather
Jeffersontown is set in Kentucky's humid subtropical-to-continental climate, about 18 km east of Louisville. Summers bring warm, humid summers (June–August). The year winds down with mild-to-cool winters (December–February) with occasional snow. This page shows live, auto-refreshing weather for Jeffersontown: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Kentucky/Louisville.
Frequently asked questions
Jeffersontown is about 18 km east of Louisville, in Kentucky.
Jeffersontown sees mild-to-cool winters (December–February) with occasional snow.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Jeffersontown's exact coordinates. No fixed schedule, the page updates whenever you load it.
August is usually the hottest month in Jeffersontown, with average daytime highs of about 30°C and nights around 19°C.
The coldest nights come in January, when the average low is about -4°C and daytime highs reach around 4°C. Frost is possible on clear, calm nights.
Jeffersontown receives about 1310 mm of rain in a typical year. May is the wettest month at roughly 138 mm, and the main rainy period is March to July, October and December.
August to September usually offer the most comfortable weather in Jeffersontown, with mild daytime temperatures and little rain.
In November Jeffersontown typically sees daytime highs near 13°C and lows near 2°C, with about 98 mm of rain over the month and average humidity around 78%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Jeffersontown is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Jeffersontown's day-to-day weather follows the broader pattern of Kentucky described above. See the hourly weather forecast or the air quality index for more detail.