Dupo, IL Weather Forecast & Current Conditions

Feedback E-mail the Weather

Quick Clicks

Weather World

Dupo, IL Weather Maps

°F °C°F °C
Dupo Weather Map
UTC Time: 9/27/2026, 14:53
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Dupo, IL Regional Weather

Expires:202609271500;;141604
ASUS43 KLOT 271410
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
900 AM CDT SUN SEP 27 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>102-271500-
SOUTHWEST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          MOSUNNY   61  57  88 VRB6      30.12R TC  16           
BELLEVILLE     CLOUDY    63  62  97 CALM      30.09R TC  17           
CAHOKIA*       CLOUDY    62  60  93 CALM      30.10S TC  17           
SPARTA*        LGT RAIN  61  58  91 N5        30.11S TC  16           
$$


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

Dupo, IL

Today
Rain Showers
75°/ 55° 24°/ 13°
60%
Monday
Sunny
78°/ 55° 26°/ 13°
0%
Tuesday
Sunny
82°/ 65° 28°/ 18°
0%
Wednesday
Thunderstorms
85°/ 68° 29°/ 20°
50%
Thursday
Rain Showers
80°/ 65° 27°/ 18°
70%
Fri-Fri Night
Thunderstorms
75°24°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy. Showers likely this morning. Highs in the mid 70s. Northeast winds around 5 mph. Chance of rain 60 percent.

Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 50s. Northeast winds around 5 mph.

Alton, MO

Today
Rain Showers
75°/ 55° 24°/ 13°
60%
Monday
Sunny
78°/ 55° 26°/ 13°
0%
Tuesday
Sunny
82°/ 65° 28°/ 18°
0%
Wednesday
Thunderstorms
85°/ 68° 29°/ 20°
50%
Thursday
Rain Showers
80°/ 65° 27°/ 18°
70%
Fri-Fri Night
Thunderstorms
75°24°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy. Showers likely this morning. Highs in the mid 70s. Northeast winds around 5 mph. Chance of rain 60 percent.

Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 50s. Northeast winds around 5 mph.

Monroe County, IL

Today
Rain Showers
75°/ 55° 24°/ 13°
50%
Monday
Sunny
78°/ 52° 26°/ 11°
0%
Tuesday
Sunny
82°/ 62° 28°/ 17°
0%
Wed Night
Rain Showers
68°20°
40%
Thursday
Rain Showers
82°/ 62° 28°/ 17°
60%
Fri-Fri Night
Thunderstorms
75°24°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy. A chance of showers this morning. Highs in the mid 70s. Light and variable winds, becoming northeast around 5 mph this afternoon. Chance of rain 50 percent.

Night: Mostly cloudy. Lows in the mid 50s. Northeast winds around 5 mph in the evening, becoming light and variable.

Alton, IL

Today
Rain Showers
75°/ 55° 24°/ 13°
60%
Monday
Sunny
78°/ 55° 26°/ 13°
0%
Tuesday
Sunny
82°/ 65° 28°/ 18°
0%
Wednesday
Thunderstorms
85°/ 68° 29°/ 20°
50%
Thursday
Rain Showers
80°/ 65° 27°/ 18°
70%
Fri-Fri Night
Thunderstorms
75°24°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy. Showers likely this morning. Highs in the mid 70s. Northeast winds around 5 mph. Chance of rain 60 percent.

Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 50s. Northeast winds around 5 mph.

Jefferson County, MO

Today
Rain Showers
75°/ 55° 24°/ 13°
50%
Monday
Sunny
78°/ 52° 26°/ 11°
0%
Tuesday
Sunny
82°/ 62° 28°/ 17°
0%
Wed Night
Rain Showers
68°20°
40%
Thursday
Rain Showers
82°/ 62° 28°/ 17°
60%
Fri-Fri Night
Thunderstorms
75°24°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy. A chance of showers this morning. Highs in the mid 70s. Light and variable winds, becoming northeast around 5 mph this afternoon. Chance of rain 50 percent.

Night: Mostly cloudy. Lows in the mid 50s. Northeast winds around 5 mph in the evening, becoming light and variable.

Chester, IL

Today
Rain Showers
75°/ 55° 24°/ 13°
40%
Monday
Sunny
78°/ 52° 26°/ 11°
0%
Tuesday
Sunny
82°/ 62° 28°/ 17°
0%
Wed Night
Rain Showers
65°18°
40%
Thursday
Rain Showers
82°/ 62° 28°/ 17°
60%
Fri-Fri Night
Thunderstorms
75°24°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy. A chance of showers this morning. Highs in the mid 70s. Northeast winds around 5 mph. Chance of rain 40 percent.

Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 50s. North winds around 5 mph in the evening, becoming light and variable.

Centralia, IL

Today
Rain Showers
78°/ 52° 26°/ 11°
20%
Monday
Sunny
75°/ 52° 24°/ 11°
0%
Tuesday
Sunny
82°/ 62° 28°/ 17°
0%
Wed Night
Rain Showers
68°20°
30%
Thursday
Rain Showers
82°/ 65° 28°/ 18°
60%
Fri-Fri Night
Thunderstorms
75°24°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy with a slight chance of showers this morning, then partly sunny this afternoon. Highs in the upper 70s. Light and variable winds, becoming north around 5 mph this afternoon. Chance of rain 20 percent.

Night: Mostly cloudy in the evening, then clearing. Lows in the lower 50s. North winds around 5 mph in the evening, becoming light and variable.

Washington, MO

Today
Rain Showers
75°/ 55° 24°/ 13°
60%
Monday
Sunny
78°/ 55° 26°/ 13°
0%
Tuesday
Sunny
82°/ 65° 28°/ 18°
0%
Wednesday
Rain Showers
85°/ 68° 29°/ 20°
50%
Thursday
Rain Showers
78°/ 62° 26°/ 17°
70%
Friday
Thunderstorms
75°/ 58° 24°/ 14°
60%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy with showers likely this morning, then partly sunny with a slight chance of showers this afternoon. Highs in the mid 70s. East winds around 5 mph. Chance of rain 60 percent.

Night: Mostly cloudy. Lows in the mid 50s. Northeast winds around 5 mph in the evening, becoming light and variable.

Greene County, IL

Today
Rain Showers
72°/ 52° 22°/ 11°
50%
Monday
Sunny
75°/ 52° 24°/ 11°
0%
Tuesday
Sunny
82°/ 62° 28°/ 17°
0%
Wed-Wed Night
Thunderstorms
82°28°
50%
Thursday
Rain Showers
78°/ 62° 26°/ 17°
70%
Fri-Fri Night
Thunderstorms
75°24°
50%
Saturday
Rain Showers
72°22°
40%

Day: Mostly cloudy. A chance of showers this morning. Highs in the lower 70s. Northeast winds around 5 mph. Chance of rain 50 percent.

Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 50s. Northeast winds around 5 mph.

Chester, MO

Today
Rain Showers
75°/ 55° 24°/ 13°
40%
Monday
Sunny
78°/ 52° 26°/ 11°
0%
Tuesday
Sunny
82°/ 62° 28°/ 17°
0%
Wed Night
Rain Showers
65°18°
40%
Thursday
Rain Showers
82°/ 62° 28°/ 17°
60%
Fri-Fri Night
Thunderstorms
75°24°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy. A chance of showers this morning. Highs in the mid 70s. Northeast winds around 5 mph. Chance of rain 40 percent.

Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 50s. North winds around 5 mph in the evening, becoming light and variable.

Farmington, MO

Today
Rain Showers
75°/ 58° 24°/ 14°
40%
Monday
Sunny
78°/ 55° 26°/ 13°
0%
Tuesday
Sunny
82°/ 62° 28°/ 17°
0%
Wed Night
Rain Showers
65°18°
40%
Thursday
Rain Showers
82°/ 62° 28°/ 17°
60%
Fri Night-Sat
Thunderstorms
60°16°
50%

Day: Mostly cloudy with a chance of showers this morning, then partly sunny this afternoon. Highs in the mid 70s. Light and variable winds, becoming northeast around 5 mph this afternoon. Chance of rain 40 percent.

Night: Mostly cloudy. Lows in the upper 50s. Northeast winds around 5 mph in the evening, becoming light and variable.

Litchfield, IL

Today
Rain Showers
75°/ 52° 24°/ 11°
20%
Monday
Sunny
78°/ 52° 26°/ 11°
0%
Tuesday
Sunny
80°/ 62° 27°/ 17°
0%
Wednesday
Rain Showers
82°/ 65° 28°/ 18°
50%
Thursday
Rain Showers
78°/ 62° 26°/ 17°
60%
Fri-Fri Night
Thunderstorms
75°24°
50%
Saturday
Rain Showers
72°22°
40%

Day: Mostly cloudy with a slight chance of showers this morning, then partly sunny this afternoon. Highs in the mid 70s. Light and variable winds, becoming northeast around 5 mph this afternoon. Chance of rain 20 percent.

Night: Partly cloudy in the evening, then clearing. Lows in the lower 50s. Northeast winds around 5 mph.

Pinckneyville, IL

Today
Sprinkles
75°/ 52° 24°/ 11°
0%
Monday
Sunny
78°/ 52° 26°/ 11°
0%
Tuesday
Sunny
82°/ 60° 28°/ 16°
0%
Wed-Wed Night
Mostly Cloudy
85°29°
0%
Thursday
Rain Showers
82°/ 62° 28°/ 17°
50%
Fri Night
Rain Showers
62°17°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy with a chance of sprinkles. Highs in the mid 70s. Calm winds, becoming north around 5 mph this afternoon.

Night: Mostly cloudy in the evening, then clearing. Lows in the lower 50s. North winds around 5 mph in the evening, becoming light and variable.

Perryville, MO

Today
Rain Showers
72°/ 55° 22°/ 13°
30%
Monday
Sunny
75°/ 52° 24°/ 11°
0%
Tuesday
Sunny
80°/ 60° 27°/ 16°
0%
Wednesday
Partly Cloudy
85°/ 65° 29°/ 18°
30%
Thu-Thu Night
Rain Showers
82°28°
50%
Fri-Fri Night
Rain Showers
75°24°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy. A chance of showers this morning, then a chance of sprinkles this afternoon. Highs in the lower 70s. North winds around 5 mph. Chance of rain 30 percent.

Night: Mostly cloudy with a chance of sprinkles in the evening, then partly cloudy after midnight. Lows in the mid 50s. North winds around 5 mph.

Carbondale, IL

Today
Sprinkles
75°/ 55° 24°/ 13°
0%
Monday
Sunny
75°/ 52° 24°/ 11°
0%
Tuesday
Sunny
80°/ 60° 27°/ 16°
0%
Wed-Wed Night
Mostly Cloudy
85°29°
0%
Thu-Thu Night
Rain Showers
82°28°
50%
Fri-Fri Night
Rain Showers
75°24°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy with a chance of sprinkles. Highs in the mid 70s. Calm winds, becoming north around 5 mph this afternoon.

Night: Mostly cloudy in the evening, then clearing. Lows in the mid 50s. North winds around 5 mph in the evening, becoming light and variable.

Mount Vernon, IL

Today
Mostly Cloudy
75°/ 52° 24°/ 11°
0%
Monday
Sunny
78°/ 52° 26°/ 11°
0%
Tuesday
Sunny
82°/ 62° 28°/ 17°
0%
Wed-Wed Night
Mostly Cloudy
85°29°
0%
Thursday
Rain Showers
82°/ 62° 28°/ 17°
50%
Fri Night
Rain Showers
62°17°
50%
Saturday
Rain Showers
72°22°
50%

Day: Mostly cloudy. Highs in the mid 70s. Northeast winds around 5 mph.

Night: Mostly cloudy in the evening, then clearing. Lows in the lower 50s. Northeast winds around 5 mph in the evening, becoming light and variable.

Quincy, MO

Today
Rain Showers
68°/ 55° 20°/ 13°
80%
Monday
Sunny
75°/ 55° 24°/ 13°
0%
Tuesday
Partly Cloudy
78°/ 65° 26°/ 18°
50%
Wednesday
Thunderstorms
78°/ 65° 26°/ 18°
70%
Thursday
Thunderstorms
75°/ 62° 24°/ 17°
80%
Friday
Thunderstorms
72°/ 58° 22°/ 14°
50%
Saturday
Rain Showers
70°21°
40%

Day: Mostly cloudy. Showers, mainly this morning. Highs in the upper 60s. East winds around 5 mph. Chance of rain 80 percent.

Night: Mostly cloudy. Lows in the mid 50s. Northeast winds around 5 mph in the evening, becoming light and variable.

Quincy, IL

Today
Rain Showers
68°/ 55° 20°/ 13°
80%
Monday
Sunny
75°/ 55° 24°/ 13°
0%
Tuesday
Partly Cloudy
78°/ 65° 26°/ 18°
50%
Wednesday
Thunderstorms
78°/ 65° 26°/ 18°
70%
Thursday
Thunderstorms
75°/ 62° 24°/ 17°
80%
Friday
Thunderstorms
72°/ 58° 22°/ 14°
50%
Saturday
Rain Showers
70°21°
40%

Day: Mostly cloudy. Showers, mainly this morning. Highs in the upper 60s. East winds around 5 mph. Chance of rain 80 percent.

Night: Mostly cloudy. Lows in the mid 50s. Northeast winds around 5 mph in the evening, becoming light and variable.

Cape Girardeau, MO

Today
Sprinkles
72°/ 55° 22°/ 13°
0%
Monday
Sunny
75°/ 52° 24°/ 11°
0%
Tuesday
Sunny
80°/ 58° 27°/ 14°
0%
Wed-Wed Night
Mostly Cloudy
85°29°
0%
Thu-Thu Night
Rain Showers
82°28°
50%
Friday
Rain Showers
75°24°
50%
Saturday
Rain Showers
75°24°
50%

Day: Mostly cloudy with a chance of sprinkles. Highs in the lower 70s. North winds around 5 mph.

Night: Mostly cloudy with a chance of sprinkles in the evening, then partly cloudy after midnight. Lows in the mid 50s. North winds around 5 mph.

West Frankfort, IL

Today
Sprinkles
75°/ 52° 24°/ 11°
0%
Monday
Sunny
78°/ 52° 26°/ 11°
0%
Tuesday
Sunny
82°/ 62° 28°/ 17°
0%
Wed-Wed Night
Mostly Cloudy
85°29°
0%
Thu-Thu Night
Rain Showers
82°28°
50%
Fri-Fri Night
Rain Showers
78°26°
50%
Saturday
Rain Showers
75°24°
50%

Day: Mostly cloudy this morning, then partly sunny with a chance of sprinkles this afternoon. Highs in the mid 70s. Northeast winds around 5 mph.

Night: Mostly cloudy in the evening, then clearing. Lows in the lower 50s. Northeast winds around 5 mph in the evening, becoming light and variable.

Names listed above may include county names.

Trending Headlines

Trending Entertainment Headlines

Dupo Radar Loop

Use the map search tool if you want to place a location marker on the radar map...

Dupo Quick Facts

National Two Day Weather Forecast


E-mail the Dupo Weather Forecast

Voice your opinion or tell us about page issues...