Piatt County, IL Weather Forecast
County weather hub
Isolated Rain Showers
Compare major city weather across Piatt County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Isolated rain showers before 4pm. Mostly sunny. High near 94, with temperatures falling to around 89 in the afternoon. Heat index values as high as 102. South southwest wind 0 to 3 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Piatt County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 4 of 4 mapped cities in Piatt County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 16 to Jul 22, 2026
- Latest sync
- Jul 16, 2026 4:19 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Piatt County
This Afternoon looks like the warmest upcoming period in Piatt County at 94 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 59 degrees F.
The strongest winds are forecast for Tuesday at about 10 to 16 mph NW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 16, 2026 4:19 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 72. South southwest wind around 3 mph. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms between 9am and 2pm, then showers and thunderstorms likely between 2pm and 3pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 87. West southwest wind 2 to 8 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 72. Southwest wind 5 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Sunny, with a high near 89. West wind 8 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms before 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 68. North northwest wind 6 to 13 mph, with gusts as high as 17 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Sunny, with a high near 85. Northeast wind around 7 mph.
Mostly clear, with a low around 65.
Mostly sunny, with a high near 88.
A chance of rain showers between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 72.
A chance of showers and thunderstorms before 7am. Sunny, with a high near 87.
Mostly clear, with a low around 64.
Sunny, with a high near 79.
Mostly clear, with a low around 59.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jul 16
|
Isolated Rain Showers
|
94°F |
0 to 3 mph
SSW
|
|
Tonight
Jul 16
|
Partly Cloudy
|
72°F |
3 mph
SSW
|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
87°F |
2 to 8 mph
WSW
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms then Mostly Clear
|
72°F |
5 to 8 mph
SW
|
|
Saturday
Jul 18
|
Sunny then Chance Showers And Thunderstorms
|
89°F |
8 to 15 mph
W
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
68°F |
6 to 13 mph
NNW
|
|
Sunday
Jul 19
|
Sunny
|
85°F |
7 mph
NE
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
65°F |
6 mph
ESE
|
|
Monday
Jul 20
|
Mostly Sunny
|
88°F |
6 to 10 mph
S
|
|
Monday Night
Jul 20
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
72°F |
12 mph
WSW
|
|
Tuesday
Jul 21
|
Chance Showers And Thunderstorms then Sunny
|
87°F |
10 to 16 mph
NW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
64°F |
9 to 14 mph
N
|
|
Wednesday
Jul 22
|
Sunny
|
79°F |
13 mph
NNE
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
59°F |
5 to 9 mph
NE
|
Major City Forecasts
Live forecast snapshots for major cities across Piatt County.
Coverage
Forecast coverage currently spans 4 of 4 mapped cities in Piatt County.
Largest mapped city population in this region: 5,557.
