Simpson Pond, IL Weather Forecast & Current Conditions

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Simpson Pond, IL Weather Maps

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Simpson Pond Weather Map
UTC Time: 9/16/2026, 10:18
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Simpson Pond, IL Regional Weather

Expires:202609161100;;540595
ASUS43 KLOT 161012
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
500 AM CDT WED SEP 16 2026

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
  REPORT WEATHER SUCH AS PRECIPITATION OR FOG.


ILZ079-100>102-161100-
SOUTHWEST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          PTCLDY    75  72  88 N6        30.19R TC  24           
BELLEVILLE     PTCLDY    77  76  97 W3        30.15R TC  25           
CAHOKIA*       MOCLDY    77  73  87 N9        30.17R TC  25           
SPARTA*        PTCLDY    78  71  79 S6        30.18R HX  81  TC  26   
$$


SKY/WX - Weather  TMP - Temperature  DP - Dew Point  RH - Humidity
WIND - Wind Direction/Speed PRES - Barometric Pressure VSB - Visibility
WCI - Wind Chill Index E13G22 Wind - East Wind 13 mph/Gusts of 22 mph

Simpson Pond, IL

Today
Thunderstorms
95°/ 75° 35°/ 24°
20%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sun-Sun Night
Rain Showers
95°35°
20%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
30%
Tuesday
Rain Showers
85°29°
30%

Day: Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 106.

Night: Partly cloudy in the evening, then clearing. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early in the evening.

Monroe, IL

Today
Thunderstorms
95°/ 75° 35°/ 24°
30%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Sat Night
Thunderstorms
72°22°
20%
Sunday
Rain Showers
95°/ 68° 35°/ 20°
30%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
40%
Tuesday
Rain Showers
82°28°
30%

Day: Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. East winds around 5 mph, becoming southwest around 5 mph this afternoon. Chance of rain 20 percent. Heat index values up to 107.

Night: Mostly cloudy with a chance of thunderstorms with a slight chance of showers in the evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 30 percent. Heat index values up to 103 early in the evening.

Sainte Genevieve, MO

Today
Thunderstorms
95°/ 75° 35°/ 24°
20%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sun-Sun Night
Rain Showers
95°35°
20%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
30%
Tuesday
Rain Showers
85°29°
30%

Day: Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 106.

Night: Partly cloudy in the evening, then clearing. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early in the evening.

Saint Clair, IL

Today
Thunderstorms
95°/ 75° 35°/ 24°
50%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sunday
Thunderstorms
92°/ 68° 33°/ 20°
40%
Monday
Thunderstorms
85°/ 65° 29°/ 18°
30%
Tuesday
Rain Showers
82°28°
20%

Day: Mostly sunny. A chance of showers and thunderstorms, mainly this morning. Highs in the mid 90s. East winds around 5 mph, becoming southwest this afternoon. Chance of rain 50 percent. Heat index values up to 106.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Humid with lows in the mid 70s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Perry, MO

Today
Sunny
95°/ 72° 35°/ 22°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Cloudy
95°35°
0%
Sun Night
Cloudy
95°35°
0%
Monday
Sunny
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
85°29°
30%

Day: Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph.

Night: Mostly clear. Lows in the lower 70s. South winds around 5 mph.

Washington, IL

Today
Thunderstorms
95°/ 75° 35°/ 24°
30%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sun Night
Rain Showers
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
85°29°
20%

Day: Mostly sunny. A chance of showers and thunderstorms, mainly this morning. Hot with highs in the mid 90s. Southeast winds around 5 mph, becoming southwest around 5 mph this afternoon. Chance of rain 30 percent. Heat index values up to 106.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Perry, IL

Today
Sunny
98°/ 72° 37°/ 22°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Cloudy
98°37°
0%
Sun Night
Cloudy
98°37°
0%
Monday
Sunny
90°/ 65° 32°/ 18°
30%
Tuesday
Rain Showers
85°29°
30%

Day: Mostly sunny. Hot with highs in the upper 90s. South winds around 5 mph. Highest heat index readings heat index readings up to 106 this afternoon.

Night: Partly cloudy in the evening, then clearing. Lows in the lower 70s. South winds around 5 mph.

Monroe, MO

Today
Thunderstorms
95°/ 75° 35°/ 24°
30%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Sat Night
Thunderstorms
72°22°
20%
Sunday
Rain Showers
95°/ 68° 35°/ 20°
30%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
40%
Tuesday
Rain Showers
82°28°
30%

Day: Mostly sunny with a slight chance of showers and thunderstorms. Hot with highs in the mid 90s. East winds around 5 mph, becoming southwest around 5 mph this afternoon. Chance of rain 20 percent. Heat index values up to 107.

Night: Mostly cloudy with a chance of thunderstorms with a slight chance of showers in the evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 30 percent. Heat index values up to 103 early in the evening.

Saint Francois, MO

Today
Thunderstorms
95°/ 72° 35°/ 22°
20%
Thursday
Sunny
95°/ 72° 35°/ 22°
0%
Friday
Sunny
95°/ 70° 35°/ 21°
0%
Sat-Sat Night
Cloudy
95°35°
0%
Sun-Sun Night
Rain Showers
95°35°
20%
Mon-Mon Night
Thunderstorms
88°31°
50%
Tuesday
Rain Showers
82°28°
40%

Day: Sunny. A slight chance of showers and thunderstorms this afternoon. Hot with highs in the mid 90s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 104.

Night: Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 70s. South winds around 5 mph.

Jackson, IL

Today
Sunny
98°/ 72° 37°/ 22°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Cloudy
98°37°
0%
Sun Night
Cloudy
98°37°
0%
Monday
Sunny
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
85°29°
30%

Day: Sunny, hot with highs in the upper 90s. South winds 5 to 10 mph.

Night: Mostly clear. Lows in the lower 70s. South winds around 5 mph.

Clinton, IL

Today
Thunderstorms
95°/ 75° 35°/ 24°
30%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sun Night
Rain Showers
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
85°29°
20%

Day: Mostly sunny. A chance of showers and thunderstorms, mainly this morning. Hot with highs in the mid 90s. Southeast winds around 5 mph, becoming southwest around 5 mph this afternoon. Chance of rain 30 percent. Heat index values up to 106.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Saint Louis, MO

Today
Thunderstorms
95°/ 75° 35°/ 24°
50%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sunday
Thunderstorms
92°/ 68° 33°/ 20°
40%
Monday
Thunderstorms
85°/ 65° 29°/ 18°
30%
Tuesday
Rain Showers
82°28°
20%

Day: Mostly sunny. A chance of showers and thunderstorms, mainly this morning. Highs in the mid 90s. East winds around 5 mph, becoming southwest this afternoon. Chance of rain 50 percent. Heat index values up to 106.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Humid with lows in the mid 70s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Saint Louis City, MO

Today
Thunderstorms
95°/ 75° 35°/ 24°
50%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sunday
Thunderstorms
92°/ 68° 33°/ 20°
40%
Monday
Thunderstorms
85°/ 65° 29°/ 18°
30%
Tuesday
Rain Showers
82°28°
20%

Day: Mostly sunny. A chance of showers and thunderstorms, mainly this morning. Highs in the mid 90s. East winds around 5 mph, becoming southwest this afternoon. Chance of rain 50 percent. Heat index values up to 106.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Humid with lows in the mid 70s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Madison, IL

Today
Thunderstorms
95°/ 75° 35°/ 24°
50%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sunday
Thunderstorms
92°/ 68° 33°/ 20°
40%
Monday
Thunderstorms
85°/ 65° 29°/ 18°
30%
Tuesday
Rain Showers
82°28°
20%

Day: Mostly sunny. A chance of showers and thunderstorms, mainly this morning. Highs in the mid 90s. East winds around 5 mph, becoming southwest this afternoon. Chance of rain 50 percent. Heat index values up to 106.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Humid with lows in the mid 70s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Washington, MO

Today
Thunderstorms
92°/ 75° 33°/ 24°
40%
Thursday
Thunderstorms
95°/ 72° 35°/ 22°
30%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
95°/ 70° 35°/ 21°
20%
Sunday
Rain Showers
92°/ 65° 33°/ 18°
40%
Monday
Thunderstorms
85°/ 62° 29°/ 17°
40%
Tuesday
Rain Showers
80°27°
30%

Day: Mostly sunny with a slight chance of showers. A slight chance of thunderstorms this morning, then a chance of thunderstorms this afternoon. Highs in the lower 90s. Southeast winds around 5 mph, becoming southwest this afternoon. Chance of rain 40 percent. Heat index values up to 104.

Night: Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 30 percent. Heat index values up to 100 early in the evening.

Cape Girardeau, MO

Today
Sunny
95°/ 72° 35°/ 22°
0%
Thursday
Sunny
95°/ 72° 35°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Cloudy
95°35°
0%
Sun Night
Cloudy
95°35°
0%
Mon-Mon Night
Cloudy
88°31°
0%
Tuesday
Rain Showers
85°29°
30%

Day: Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph.

Night: Mostly clear. Lows in the lower 70s. South winds around 5 mph.

Madison, MO

Today
Thunderstorms
95°/ 72° 35°/ 22°
20%
Thursday
Sunny
95°/ 72° 35°/ 22°
0%
Friday
Sunny
95°/ 70° 35°/ 21°
0%
Sat-Sat Night
Cloudy
95°35°
0%
Sun-Sun Night
Rain Showers
95°35°
20%
Mon-Mon Night
Thunderstorms
88°31°
50%
Tuesday
Rain Showers
82°28°
40%

Day: Sunny. A slight chance of showers and thunderstorms this afternoon. Hot with highs in the mid 90s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 104.

Night: Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 70s. South winds around 5 mph.

Bollinger, MO

Today
Sunny
95°/ 72° 35°/ 22°
0%
Thursday
Sunny
95°/ 72° 35°/ 22°
0%
Friday
Sunny
95°/ 70° 35°/ 21°
0%
Saturday
Cloudy
95°35°
0%
Sun Night
Cloudy
95°35°
0%
Monday
Rain Showers
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
85°29°
40%

Day: Sunny, hot with highs in the mid 90s. South winds 5 to 10 mph.

Night: Mostly clear. Lows in the lower 70s. South winds around 5 mph.

Jefferson, IL

Today
Sunny
98°/ 75° 37°/ 24°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Cloudy
98°37°
0%
Sun Night
Cloudy
98°37°
0%
Monday
Sunny
90°/ 65° 32°/ 18°
30%
Tuesday
Rain Showers
85°29°
30%

Day: Mostly sunny. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph.

Night: Partly cloudy in the evening, then clearing. Lows in the mid 70s. South winds around 5 mph.

Franklin, IL

Today
Sunny
98°/ 75° 37°/ 24°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
98°/ 72° 37°/ 22°
0%
Saturday
Cloudy
98°37°
0%
Sun Night
Cloudy
98°37°
0%
Monday
Sunny
92°/ 65° 33°/ 18°
30%
Tuesday
Rain Showers
85°29°
30%

Day: Mostly sunny. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph.

Night: Partly cloudy in the evening, then clearing. Lows in the mid 70s. South winds around 5 mph.

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