Riverveiw, IL Weather Forecast & Current Conditions

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Riverveiw, IL Weather Maps

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Riverveiw Weather Map
UTC Time: 9/18/2026, 18:21
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Riverveiw, IL Regional Weather

Expires:202609181900;;666157
ASUS43 KLOT 181810
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
100 PM CDT FRI SEP 18 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>102-181900-
SOUTHWEST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          SUNNY     93  72  49 NE5       30.13F HX 100  TC  34   
CAHOKIA*       SUNNY     93  72  50 CALM      30.12F HX 101  TC  34   
SPARTA*        SUNNY     95  69  42 W5        30.14F HX 100  TC  35   
$$


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

Riverveiw, IL

Afternoon
Thunderstorms
95°/ 70° 35°/ 21°
30%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
50%
Monday
Thunderstorms
85°/ 60° 29°/ 16°
60%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Cloudy
55°13°
0%
Thursday
Cloudy
55°13°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 30 percent. Heat index values up to 107.

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

Sainte Genevieve, MO

Afternoon
Thunderstorms
95°/ 70° 35°/ 21°
30%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
50%
Monday
Thunderstorms
85°/ 60° 29°/ 16°
60%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Cloudy
55°13°
0%
Thursday
Cloudy
55°13°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 30 percent. Heat index values up to 107.

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

Monroe, IL

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
30%
Saturday
Partly Cloudy
98°/ 72° 37°/ 22°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
50%
Monday
Thunderstorms
82°/ 58° 28°/ 14°
70%
Tue-Tue Night
Mostly Cloudy
72°22°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. West winds around 5 mph early, becoming light and variable. Chance of rain 30 percent. Heat index values up to 109.

Night: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Saint Clair, IL

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
30%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Thunderstorms
92°33°
20%
Sun Night-Mon
Thunderstorms
68°20°
70%
Mon Night
Thunderstorms
60°16°
40%
Tue-Tue Night
Mostly Cloudy
72°22°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. East winds around 5 mph, becoming southeast. Chance of rain 30 percent. Heat index values up to 107.

Night: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Perryville, MO

Afternoon
Thunderstorms
95°/ 70° 35°/ 21°
20%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
40%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
60%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Cloudy
55°13°
0%
Thursday
Cloudy
55°13°
0%

Day: Mostly sunny with a slight chance of showers and thunderstorms. Hot. Near steady temperature in the mid 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Highest heat index readings heat index readings up to 105.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows around 70. South winds around 5 mph. Chance of rain 20 percent.

Pinckneyville, IL

Afternoon
Thunderstorms
98°/ 72° 37°/ 22°
20%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
40%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
60%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Cloudy
55°13°
0%
Thursday
Cloudy
55°13°
0%

Day: Sunny with a slight chance of showers and thunderstorms. Hot. Near steady temperature in the upper 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Highest heat index readings heat index readings up to 105.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent.

Saint Francois, MO

Afternoon
Thunderstorms
95°/ 70° 35°/ 21°
20%
Saturday
Sunny
98°/ 70° 37°/ 21°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
50%
Monday
Thunderstorms
85°/ 62° 29°/ 17°
70%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Cloudy
55°13°
0%
Thursday
Cloudy
55°13°
0%

Day: Sunny. A slight chance of showers and thunderstorms. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 105.

Night: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows around 70. Light and variable winds, becoming south around 5 mph after midnight. Chance of rain 20 percent. Heat index values up to 101 early in the evening.

Monroe, MO

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
30%
Saturday
Partly Cloudy
98°/ 72° 37°/ 22°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
50%
Monday
Thunderstorms
82°/ 58° 28°/ 14°
70%
Tue-Tue Night
Mostly Cloudy
72°22°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. West winds around 5 mph early, becoming light and variable. Chance of rain 30 percent. Heat index values up to 109.

Night: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Carbondale, IL

Afternoon
Thunderstorms
98°/ 72° 37°/ 22°
20%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
30%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
50%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Cloudy
55°13°
0%
Thursday
Cloudy
55°13°
0%

Day: Sunny with a slight chance of showers and thunderstorms. Hot. Near steady temperature in the upper 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Highest heat index readings heat index readings 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 lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent.

Washington, IL

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
30%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Rain Showers
92°/ 68° 33°/ 20°
50%
Monday
Thunderstorms
85°/ 60° 29°/ 16°
60%
Tuesday
Thunderstorms
75°/ 55° 24°/ 13°
20%
Wednesday
Cloudy
55°13°
0%
Thursday
Cloudy
55°13°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. Northeast winds around 5 mph, becoming north. 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. Humid with lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Saint Louis, MO

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
30%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Thunderstorms
92°33°
20%
Sun Night-Mon
Thunderstorms
68°20°
70%
Mon Night
Thunderstorms
60°16°
40%
Tue-Tue Night
Mostly Cloudy
72°22°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. East winds around 5 mph, becoming southeast. Chance of rain 30 percent. Heat index values up to 107.

Night: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Clinton, IL

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
30%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Rain Showers
92°/ 68° 33°/ 20°
50%
Monday
Thunderstorms
85°/ 60° 29°/ 16°
60%
Tuesday
Thunderstorms
75°/ 55° 24°/ 13°
20%
Wednesday
Cloudy
55°13°
0%
Thursday
Cloudy
55°13°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. Northeast winds around 5 mph, becoming north. 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. Humid with lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Madison, MO

Afternoon
Thunderstorms
95°/ 70° 35°/ 21°
20%
Saturday
Sunny
98°/ 70° 37°/ 21°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
50%
Monday
Thunderstorms
85°/ 62° 29°/ 17°
70%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wednesday
Cloudy
55°13°
0%
Thursday
Cloudy
55°13°
0%

Day: Sunny. A slight chance of showers and thunderstorms. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 105.

Night: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows around 70. Light and variable winds, becoming south around 5 mph after midnight. Chance of rain 20 percent. Heat index values up to 101 early in the evening.

Cape Girardeau, MO

Afternoon
Thunderstorms
98°/ 72° 37°/ 22°
20%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
0%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
50%
Tuesday
Partly Cloudy
78°/ 55° 26°/ 13°
0%
Wed Night
Cloudy
55°13°
0%
Thursday
Sunny
78°26°
0%

Day: Sunny with a slight chance of showers and thunderstorms. Hot. Near steady temperature in the upper 90s. Southwest winds around 5 mph. Chance of rain 20 percent.

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

Washington, MO

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
30%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Rain Showers
92°33°
20%
Sun Night-Mon
Thunderstorms
65°18°
70%
Mon Night
Thunderstorms
58°14°
30%
Tuesday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Wednesday
Cloudy
52°11°
0%
Thursday
Cloudy
52°11°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 30 percent. Heat index values up to 106.

Night: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Light and variable winds, becoming south around 5 mph after midnight. Chance of rain 20 percent.

Marble Hill, MO

Afternoon
Thunderstorms
98°/ 70° 37°/ 21°
20%
Saturday
Sunny
95°/ 70° 35°/ 21°
0%
Sunday
Sunny
95°/ 68° 35°/ 20°
0%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
50%
Tuesday
Partly Cloudy
75°/ 55° 24°/ 13°
0%
Wed-Wed Night
Clear
75°24°
0%
Thursday
Sunny
78°26°
0%

Day: Sunny with a slight chance of showers and thunderstorms. Hot. Near steady temperature in the upper 90s. Southwest winds around 5 mph. Chance of rain 20 percent.

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

Saint Louis City, MO

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
30%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Thunderstorms
92°33°
20%
Sun Night-Mon
Thunderstorms
68°20°
70%
Mon Night
Thunderstorms
60°16°
40%
Tue-Tue Night
Mostly Cloudy
72°22°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. East winds around 5 mph, becoming southeast. Chance of rain 30 percent. Heat index values up to 107.

Night: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Madison, IL

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
30%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Thunderstorms
92°33°
20%
Sun Night-Mon
Thunderstorms
68°20°
70%
Mon Night
Thunderstorms
60°16°
40%
Tue-Tue Night
Mostly Cloudy
72°22°
0%
Wednesday
Cloudy
75°24°
0%
Thursday
Cloudy
75°24°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. East winds around 5 mph, becoming southeast. Chance of rain 30 percent. Heat index values up to 107.

Night: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening.

Franklin, MO

Afternoon
Thunderstorms
95°/ 72° 35°/ 22°
30%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Rain Showers
92°33°
20%
Sun Night-Mon
Thunderstorms
65°18°
70%
Mon Night
Thunderstorms
58°14°
30%
Tuesday
Mostly Cloudy
72°/ 52° 22°/ 11°
0%
Wednesday
Cloudy
52°11°
0%
Thursday
Cloudy
52°11°
0%

Day: Sunny. A chance of showers and thunderstorms. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 30 percent. Heat index values up to 106.

Night: Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Light and variable winds, becoming south around 5 mph after midnight. Chance of rain 20 percent.

West Frankfort, IL

Afternoon
Thunderstorms
98°/ 72° 37°/ 22°
20%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Sunny
98°/ 68° 37°/ 20°
0%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
50%
Tuesday
Partly Cloudy
78°/ 58° 26°/ 14°
0%
Wednesday
Cloudy
58°14°
0%
Thursday
Cloudy
58°14°
0%

Day: Sunny with a slight chance of showers and thunderstorms. Hot. Near steady temperature in the upper 90s. Southwest winds around 5 mph. Chance of rain 20 percent.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent.

Names listed above may include county names.

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