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Louisville, KY 40245 Weather
Current conditions
Observed at Louisville, Bowman Field Airport · 30 min ago
Forecast
10-day-
Overnight
Clear, with a low around 44. Northeast wind around 2 mph.
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Wednesday
Sunny, with a high near 72. Northeast wind around 3 mph.
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Wednesday Night
Patchy fog between 3am and 4am. Clear, with a low around 43. North wind around 3 mph.
National Weather Service forecast updated 59 min ago.
Hourly
Hourly forecast- Now47°
- 4 AM45°
- 5 AM44°
- 6 AM44°
- 7 AM44°
- 8 AM44°
- 9 AM46°
- 10 AM54°
- 11 AM60°
- 12 PM64°
- 1 PM68°
- 2 PM70°
- 3 PM71°
- 4 PM72°
- 5 PM71°
- 6 PM70°
- 7 PM65°
- 8 PM58°
- 9 PM55°
- 10 PM53°
- 11 PM51°
- Thu12 AM49°
- 1 AM48°
- 2 AM47°
10-day forecast
Details- TonightOct 20Clear44°
- TodayOct 21Sunny43°72°
- ThuOct 22Sunny42°70°
- FriOct 23Sunny42°68°
- SatOct 24Sunny44°71°
- SunOct 25Mostly Sunny45°73°
- MonOct 26Mostly Sunny48°72°
- TueOct 27Partly Sunny68°
- WedOct 28Cloudy49°62°
- ThuOct 29Sunny41°58°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Louisville
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Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- WedModerate
Louisville, KY reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyLouisville Area, records since 1872. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Jeffersonville 22 km
- New Albany 30 km
- Frankfort 54 km
- Jeffersontown 11 km
- Valley Station 38 km
- Clarksville 24 km
- Newburg 19 km
- Fern Creek 15 km
- Saint Matthews 15 km
- Okolona 23 km
- Shively 31 km
- Shelbyville 24 km
Forecasters' discussion
From the National Weather Service office in LMK, issued 1 hr ago
Key Messages
* Highs in the low 70s with lows in the 40s and isolated 30s will continue through the weekend.
* Patchy dense valley fog is expected to form again tonight and into the morning hours, slowly becoming patchier and isolated heading towards and west of I-65.
* Stubborn ridging promotes a prolonged dry period with pleasant afternoons through at least early next week.
Discussion
Issued at 225 PM EDT Tue Oct 20 2026
====== Dense River Valley Fog & Warm Afternoons =====
There is a mid to upper level low swinging through southern KY and can see the swirl on water vapor imagery. This is just bringing passing high level clouds in our SE. Light northeasterly flow is keeping temperatures mild in the upper 60s to low 70s across the area. Arguably, the most exciting thing to monitor would be dew points today and for the following days. This will determine how dry and comfortable each afternoon will feel, along with the chances of fog formation each morning as well. Relative humidity values are generally bottoming out in the low and mid 30s but will recover to near 100% overnight and into tomorrow morning.
Low temperatures tonight will reach the low to mid 40s and mid to upper 30s in our deepest, decoupled river valleys. Just as this morning, dense fog will likely form in river valleys in the east, becoming more patchy dense fog in valleys west of I-65. As we saw this morning, fog will dissipate by late morning, with the latest being near 10-11 AM EDT in eastern areas. Then by Wednesday afternoon, the locked in ridge pattern overhead will lock in sunny skies and generally light N-NE flow. As long as the deep low off the east coast and troughing over the western US continues, our pattern will remain the same.
We'll have to monitor the dew points tomorrow as well as this will alter fog chances for Thursday morning. Fog may become more prevalent by then, but this will be fine tuned between now and tomorrow night.
===== Stubborn Ridging and Next Potential Rain Chance =====
Aviation
Issued at 134 AM EDT Wed Oct 21 2026
Prevailing VFR conditions are likely through much of this period with SKC and a light NE wind. Fog is likely to develop in river valleys early this morning, but should not impact the terminals. However, based on T/Td trends, HNB may see some brief vis reductions early Wednesday morning.
Lmk Watches
KY...None. IN...None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.