Jefferson County has 84 places on myweatherrock (83 cities, 1 place), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 106°F at Louisville Intl Ap on July 30, 1999. The coldest night is -22°F at Louisville Intl Ap on January 19, 1994. The wettest day brought 10.48 inches of rain at Louisville Wfo on March 1, 1997. The biggest single-day snow measured 15.51 inches at Louisville Intl Ap on January 17, 1994. Those are station measurements from NOAA's daily records, 1948 to 2026, not official state records. By area the largest place is Louisville/Jefferson County metro government, about 263 square miles.
About Jefferson County weather
The map on the Now tab shows every Jefferson County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 84 Jefferson County towns with station normals, the warmest month is July, when the day usually reaches 88°F, and the coldest is January, when the night usually falls to 27°F. May is the wettest, with rain on about 14 days.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
Warnings and alerts: the National Weather Service, passed through unchanged.
Jefferson County weather records
Hottest day
106°F
Louisville Intl Ap, July 30, 1999
Coldest night
-22°F
Louisville Intl Ap, January 19, 1994
Wettest day
10.48 in
Louisville Wfo, March 1, 1997
Biggest snow
15.51 in
Louisville Intl Ap, January 17, 1994
Measured at the NOAA stations serving these towns, daily records 1948 to 2026. Station extremes, not official state records.
Common questions about Jefferson County weather
What is the hottest temperature recorded at a Jefferson County station?
106°F at Louisville Intl Ap on July 30, 1999, in the NOAA daily station records myweatherrock holds (1948 to 2026).
What is the coldest temperature recorded at a Jefferson County station?
-22°F at Louisville Intl Ap on January 19, 1994.
What is the most rain a Jefferson County station has measured in one day?
10.48 inches at Louisville Wfo on March 1, 1997.
What is the biggest one-day snowfall at a Jefferson County station?
15.51 inches at Louisville Intl Ap on January 17, 1994.
How many Jefferson County towns have a weather page here?
84: 83 cities, 1 place. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
Where does the Jefferson County forecast come from?
NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
A computer's guess at future radar. The rock does not endorse the future.
2h agonow+30m
The Rocktionary: every weather term, explained by a rock
Rockreation: pick a game
Hanging out: Tic Tac Toe
The Rockord Book
All records live on this device. The rock keeps no receipts. You keep them.
Rock, Time, Weather
?vs?
Time grinds rock. Rock endures weather. Weather does not care what year it is.
The weather you throw is whatever is outside right now.
Rocktoid or Rubbish
Rocktoid, or rubbish?
Warmer or Colder
Asking both towns...
or
Name That Sky
What is the rock standing in?
Weather Rocktoid
A new Rocktoid every midnight. The rock reads a lot.
The rock's instrument panel
Reading the instruments...
Remote Rocks: station a rock anywhere you love
Put a rock in Mom's yard, the lake house, a kid's college town. Each one stands in that sky and reports it here. Tap a rock for its forecast; the pencil renames it.
Tap me on the shoulder turns on browser notifications: when a warning or watch lands on one of your rocks, you get a notification, as long as the site is open in a tab somewhere.
Remote Rocks live on this device. We do not track you, so a rock you station on your phone will not appear on your computer or tablet, and the other way around. That is the privacy working, not a bug. Forecasts and alerts travel from here straight to the weather services, same as always.
Settings
ToneHow the site dresses. System follows your device.
Shoulder tapsBrowser notifications when a warning lands on one of your Remote Rocks. Only while the site is open in a tab.
Keep me in your pocketPut the rock on your home screen. Same site, no store, no middleman, and it opens even with no signal.
This deviceEverything the rock remembers lives right here: your town, your rocks, your settings, your tic tac toe record. One tap and it is all forgotten.
Build
Keep me in your pocket
Same site, no store, no middleman. I get my own icon, I open full screen, and I still open when you have no signal.
Tap your browser's own Share or menu button: the square with the arrow on an iPhone, the ⋮ or ⋯ menu in the corner on most others. It has to be the browser's button; websites are not allowed to press it for you.
Find and tap Add to Home Screen. Some browsers call it Install.