Springfield, Illinois 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Springfield IL
National Weather Service Forecast for:
Springfield IL
Issued by: National Weather Service Lincoln, IL |
Updated: 2:56 pm CDT Jun 26, 2025 |
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This Afternoon
 Slight Chance T-storms
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Tonight
 Slight Chance T-storms
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Friday
 Slight Chance T-storms then Chance T-storms
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Friday Night
 Mostly Cloudy
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Saturday
 Mostly Sunny
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Saturday Night
 Partly Cloudy
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Sunday
 Mostly Sunny then Chance T-storms
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Sunday Night
 Chance T-storms then Showers Likely
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Monday
 Chance T-storms
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Hi 93 °F |
Lo 76 °F |
Hi 87 °F |
Lo 73 °F |
Hi 89 °F |
Lo 72 °F |
Hi 91 °F |
Lo 72 °F |
Hi 85 °F |
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Heat Advisory
Hazardous Weather Outlook
This Afternoon
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A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 102. South southwest wind around 9 mph, with gusts as high as 15 mph. |
Tonight
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A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 76. South wind around 7 mph, with gusts as high as 16 mph. Chance of precipitation is 20%. |
Friday
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A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 87. West southwest wind 7 to 10 mph, with gusts as high as 20 mph. |
Friday Night
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Mostly cloudy, with a low around 73. West wind 5 to 7 mph becoming calm in the evening. |
Saturday
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Mostly sunny, with a high near 89. Calm wind becoming west southwest around 5 mph. |
Saturday Night
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Partly cloudy, with a low around 72. Calm wind. |
Sunday
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A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. South wind 3 to 6 mph. |
Sunday Night
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A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. Chance of precipitation is 60%. |
Monday
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A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 85. |
Monday Night
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Mostly cloudy, with a low around 68. |
Tuesday
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Sunny, with a high near 85. |
Tuesday Night
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Partly cloudy, with a low around 65. |
Wednesday
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Mostly sunny, with a high near 86. |
Forecast from NOAA-NWS
for Springfield IL.
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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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