Frankfort, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Frankfort, IL in one place.
Showers and thunderstorms likely before 4pm, then a slight chance of showers and thunderstorms. Mostly cloudy. High near 76, with temperatures falling to around 74 in the afternoon. Northeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Local Weather Overview
This forecast page for Frankfort, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 15, 2026 11:05 AM CDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for Frankfort, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 11:05 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Frankfort
Saturday looks like the warmest upcoming period in Frankfort at 83 degrees F.
Monday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Friday Night at about 10 to 15 mph ESE.
Precipitation is mentioned in 12 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 11:05 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 66. Southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 80. West northwest wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Partly sunny, with a high near 78.
A slight chance of rain showers before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83.
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 64.
Showers and thunderstorms likely. Mostly cloudy, with a high near 75.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 71.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Showers And Thunderstorms Likely
|
76°F |
5 mph
NE
|
|
Wednesday Night
Sep 16
|
Slight Chance Showers And Thunderstorms
|
66°F |
5 mph
SE
|
|
Thursday
Sep 17
|
Showers And Thunderstorms Likely
|
80°F |
5 mph
WNW
|
|
Thursday Night
Sep 17
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
64°F |
5 mph
NE
|
|
Friday
Sep 18
|
Chance Showers And Thunderstorms
|
78°F |
5 to 10 mph
ENE
|
|
Friday Night
Sep 18
|
Slight Chance Showers And Thunderstorms
|
64°F |
10 to 15 mph
ESE
|
|
Saturday
Sep 19
|
Chance Showers And Thunderstorms
|
83°F |
10 to 15 mph
SSW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
64°F |
10 mph
W
|
|
Sunday
Sep 20
|
Showers And Thunderstorms Likely
|
75°F |
10 to 15 mph
N
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
57°F |
10 to 15 mph
NE
|
|
Monday
Sep 21
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
71°F |
10 to 15 mph
NE
|
|
Monday Night
Sep 21
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
54°F |
5 to 15 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Frankfort.