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Champaign, Illinois 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Champaign IL
National Weather Service Forecast for: Champaign IL
Issued by: National Weather Service Lincoln, IL
Updated: 4:25 pm CDT Jun 26, 2025
 
This
Afternoon
This Afternoon: Isolated showers and thunderstorms.  Sunny and hot, with a high near 95. Heat index values as high as 106. Southwest wind around 8 mph.  Chance of precipitation is 20%.
Isolated
T-storms

Tonight

Tonight: Isolated showers and thunderstorms before 8pm.  Mostly clear, with a low around 75. South wind around 7 mph, with gusts as high as 15 mph.  Chance of precipitation is 20%.
Isolated
T-storms then
Mostly Clear
Friday

Friday: A 50 percent chance of showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 89. West southwest wind 8 to 13 mph, with gusts as high as 22 mph.
Slight Chance
T-storms then
Chance
T-storms
Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms before 1am.  Mostly cloudy, with a low around 71. West southwest wind 3 to 8 mph. Winds could gust as high as 15 mph.
Chance
T-storms

Saturday

Saturday: Mostly sunny, with a high near 90. West wind around 6 mph.
Mostly Sunny

Saturday
Night
Saturday Night: Partly cloudy, with a low around 71. Light and variable wind.
Partly Cloudy

Sunday

Sunday: A 30 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 92. South southwest wind 3 to 7 mph.
Sunny then
Chance
T-storms
Sunday
Night
Sunday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 72.
Chance
T-storms

Monday

Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Partly sunny, with a high near 88. Chance of precipitation is 60%.
Chance
T-storms then
Showers
Likely
Hi 95 °F Lo 75 °F Hi 89 °F Lo 71 °F Hi 90 °F Lo 71 °F Hi 92 °F Lo 72 °F Hi 88 °F

Heat Advisory
Hazardous Weather Outlook
 

This Afternoon
 
Isolated showers and thunderstorms. Sunny and hot, with a high near 95. Heat index values as high as 106. Southwest wind around 8 mph. Chance of precipitation is 20%.
Tonight
 
Isolated showers and thunderstorms before 8pm. Mostly clear, with a low around 75. South wind around 7 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.
Friday
 
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 89. West southwest wind 8 to 13 mph, with gusts as high as 22 mph.
Friday Night
 
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 71. West southwest wind 3 to 8 mph. Winds could gust as high as 15 mph.
Saturday
 
Mostly sunny, with a high near 90. West wind around 6 mph.
Saturday Night
 
Partly cloudy, with a low around 71. Light and variable wind.
Sunday
 
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. South southwest wind 3 to 7 mph.
Sunday Night
 
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Monday
 
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Chance of precipitation is 60%.
Monday Night
 
Partly cloudy, with a low around 68.
Tuesday
 
Sunny, with a high near 86.
Tuesday Night
 
Partly cloudy, with a low around 65.
Wednesday
 
Mostly sunny, with a high near 87.
Wednesday Night
 
Mostly clear, with a low around 66.
Thursday
 
Sunny, with a high near 87.

 

Forecast from NOAA-NWS for Champaign IL.

Weather Forecast Discussion
306
FXUS63 KILX 261939
AFDILX

Area Forecast Discussion...Updated
National Weather Service Lincoln IL
239 PM CDT Thu Jun 26 2025

.KEY MESSAGES...

- The heat wave will persist into the upcoming weekend for central
  and southeast IL. The highest heat index readings of 100 to 107
  degrees will occur this afternoon and early evening, but will
  remain in the upper 90s to around 100 degrees each afternoon
  Friday through Sunday. The Heat Advisory goes through 7 pm today
  across central IL, and extended until 7 pm Friday from Danville
  to Charleston/Mattoon and Effingham southeast.

- Rain chances will be minimal through tonight (20-30% areal
  coverage). Chance of showers and thunderstorms will be higher on
  Friday and Monday with frontal boundary moving through.

&&

.DISCUSSION...
Issued at 235 PM CDT Thu Jun 26 2025

Continued the heat advisory until 7 pm today for central IL and
extended the heat advisory until 7 pm Friday from Danville to
Charleston/Mattoon to Effingham southeast. Heat indices should
peak from 100-107F through 7 pm with temps in the low to mid 90s
and dewpoints in the low to mid 70s. Heat indices are expected to
peak 100-105F in southeast IL on Friday afternoon and peak in the
90s over the remained of central IL. The high heat and humidity to
linger this weekend as heat indices peaking in the mid to upper
90s on Sat afternoon (highs near 90F) and 97-103F on Sunday
afternoon (highs in the lower 90s).

Radar mosaic shows isolated convection over central IL from the
IL river southeast to I-72 and southeast of I-70, lifting slowly
northeast. Unstable tropical airmass with ML CAPES 2-3k j/kg and
SB CAPES 3500-4200 j/kg. PW values of 1.6-1.8 inches. The main
synoptic frontal boundary was near the MN/IA border and southern
WI with 1009 mb low pressure near the MN/IA/SD border. SPC Day1
continues marginal risk of severe storms for damaging winds
northern half of CWA into early evening along with locally heavy
rainfall, similar to yesterday. As low pressure tracks to
northeast of Door County WI by 12Z/7 am Fri it will pull a cold
front se toward nw IL. This to bring chance of showers and
thunderstorms to the IL river valley late tonight into fri
morning. The front moves into northern cWA Fri night and then
lifts back into northern IL during Saturday. This to keep a chance
of convection around into this weekend, though chances will be
rather low over our area. More unstable tropical airmass lingers
over southeast IL Sat where higher pops will be.

Sunday we will see tropical air mass lift further northward over
IL so temps and dewpoints along with associated Heat Indices to be
a bit higher. Have 30-40% chance of convection Sunday afternoon
and evening. Cold front to then push back se over IL on Monday
likely bringing showers and chance of thunderstorms. We are
currently not in an outlook for severe storms by SPC on Monday
afternoon/evening but will need to be watched with front moving
into an unstable air mass. Highs Monday in the mid to upper 80s
with Lawrenceville around 90F where heat indices peak in upper 90s
in far southeast IL Mon afternoon. After a chance of convection in
southeast IL Monday evening, expect dry conditions returning
overnight Monday night through Wed night as weak high pressure
settles eastward into IL during mid next week. More seasonable
temps and humidity levels for early July return middle of next
week with highs in the mid to upper 80s and lows in the mid to
upper 60s.

07

&&

.ILX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 7 PM CDT this evening for ILZ027>031-036>038-
040>045-047>055-061.

Heat Advisory until 7 PM CDT Friday for ILZ046-056-057-062-063-066>068-071>073.

&&

$$
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