Blair, IL Weather Forecast & Current Conditions

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Blair, IL Weather Maps

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Blair Weather Map
UTC Time: 9/17/2026, 04:43
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Blair, IL Regional Weather

Expires:202609170500;;580465
ASUS43 KLOT 170410
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1100 PM 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>102-170500-
SOUTHWEST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          PTCLDY    73  71  91 CALM      30.24S TC  23           
BELLEVILLE     CLEAR     75  74  97 CALM      30.21F TC  24           
CAHOKIA*       PTCLDY    76  74  93 CALM      30.22F TC  24           
SPARTA*        CLEAR     74  74 100 CALM      30.25S TC  24           
$$


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

Blair, IL

Overnight
Clear
75°24°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Rain Showers
95°/ 68° 35°/ 20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly clear. Near steady temperature in the mid 70s. Light and variable winds, becoming south around 5 mph.

Pinckneyville, IL

Tonight
Thunderstorms
72°22°
20%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 70° 37°/ 21°
0%
Sun Night
Cloudy
70°21°
0%
Monday
Partly Cloudy
92°/ 65° 33°/ 18°
30%
Tuesday
Cloudy
85°29°
0%
Wednesday
Cloudy
85°29°
0%

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

Carbondale, IL

Tonight
Clear
72°22°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sun Night
Cloudy
72°22°
0%
Monday
Partly Cloudy
92°/ 65° 33°/ 18°
30%
Tuesday
Cloudy
85°29°
0%
Wednesday
Cloudy
85°29°
0%

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

Saint Clair, IL

Overnight
Mostly Cloudy
75°24°
0%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sun Night
Thunderstorms
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
40%
Tuesday
Rain Showers
82°28°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy late this evening, then clearing. Near steady temperature in the mid 70s. South winds around 5 mph.

Sainte Genevieve, MO

Overnight
Clear
75°24°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sunday
Rain Showers
95°/ 68° 35°/ 20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
30%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly clear. Near steady temperature in the mid 70s. Light and variable winds, becoming south around 5 mph.

Perryville, MO

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

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

Washington, IL

Overnight
Cloudy
75°24°
0%
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°/ 62° 29°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy. Near steady temperature in the mid 70s. Light and variable winds, becoming south around 5 mph.

Monroe, IL

Overnight
Mostly Cloudy
75°24°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sunday
Rain Showers
92°/ 68° 33°/ 20°
20%
Mon-Mon Night
Thunderstorms
88°31°
40%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy late this evening, then clearing. Near steady temperature in the mid 70s. Light and variable winds, becoming south around 5 mph.

Clinton, IL

Overnight
Cloudy
75°24°
0%
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°/ 62° 29°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Partly cloudy. Near steady temperature in the mid 70s. Light and variable winds, becoming south around 5 mph.

Cape Girardeau, MO

Tonight
Clear
72°22°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
95°/ 72° 35°/ 22°
0%
Sun Night
Cloudy
70°21°
0%
Monday
Rain Showers
90°/ 65° 32°/ 18°
30%
Tuesday
Cloudy
85°29°
0%
Wednesday
Cloudy
85°29°
0%

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

West Frankfort, IL

Tonight
Clear
75°24°
0%
Thursday
Sunny
98°/ 75° 37°/ 24°
0%
Friday
Sunny
98°/ 72° 37°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sun Night
Cloudy
72°22°
0%
Monday
Partly Cloudy
92°/ 65° 33°/ 18°
30%
Tuesday
Cloudy
85°29°
0%
Wednesday
Cloudy
85°29°
0%

Night: Mostly clear. Lows in the mid 70s. Southwest winds around 5 mph.

Saint Francois, MO

Overnight
Clear
75°24°
0%
Thursday
Sunny
95°/ 72° 35°/ 22°
0%
Friday
Sunny
95°/ 70° 35°/ 21°
0%
Saturday
Sunny
95°/ 70° 35°/ 21°
0%
Sunday
Rain Showers
95°/ 68° 35°/ 20°
20%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
40%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly clear. Near steady temperature in the mid 70s. Light and variable winds, becoming southeast around 5 mph.

Herrin, IL

Tonight
Clear
75°24°
0%
Thursday
Sunny
98°/ 75° 37°/ 24°
0%
Friday
Sunny
98°/ 72° 37°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sun Night
Cloudy
72°22°
0%
Monday
Partly Cloudy
92°/ 65° 33°/ 18°
30%
Tuesday
Cloudy
85°29°
0%
Wednesday
Cloudy
85°29°
0%

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

Mount Vernon, IL

Tonight
Thunderstorms
75°24°
30%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 70° 37°/ 21°
0%
Sun Night
Cloudy
70°21°
0%
Monday
Partly Cloudy
92°/ 65° 33°/ 18°
30%
Tuesday
Cloudy
85°29°
0%
Wednesday
Cloudy
85°29°
0%

Night: Partly cloudy with a chance of showers with a slight chance of thunderstorms this evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 30 percent.

Monroe, MO

Overnight
Mostly Cloudy
75°24°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
20%
Sunday
Rain Showers
92°/ 68° 33°/ 20°
20%
Mon-Mon Night
Thunderstorms
88°31°
40%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy late this evening, then clearing. Near steady temperature in the mid 70s. Light and variable winds, becoming south around 5 mph.

Marble Hill, MO

Tonight
Clear
72°22°
0%
Thursday
Sunny
95°/ 72° 35°/ 22°
0%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
95°/ 70° 35°/ 21°
0%
Sun Night
Cloudy
70°21°
0%
Monday
Rain Showers
90°/ 65° 32°/ 18°
30%
Tuesday
Cloudy
85°29°
0%
Wednesday
Cloudy
85°29°
0%

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

Jonesboro, IL

Tonight
Clear
72°22°
0%
Thursday
Sunny
98°/ 72° 37°/ 22°
0%
Friday
Sunny
98°/ 72° 37°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
0%
Sun Night
Cloudy
72°22°
0%
Monday
Partly Cloudy
92°/ 68° 33°/ 20°
30%
Tuesday
Cloudy
85°29°
0%
Wednesday
Cloudy
85°29°
0%

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

Saint Louis, MO

Overnight
Mostly Cloudy
75°24°
0%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sun Night
Thunderstorms
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
40%
Tuesday
Rain Showers
82°28°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy late this evening, then clearing. Near steady temperature in the mid 70s. South winds around 5 mph.

Madison, MO

Overnight
Clear
75°24°
0%
Thursday
Sunny
95°/ 72° 35°/ 22°
0%
Friday
Sunny
95°/ 70° 35°/ 21°
0%
Saturday
Sunny
95°/ 70° 35°/ 21°
0%
Sunday
Rain Showers
95°/ 68° 35°/ 20°
20%
Monday
Thunderstorms
88°/ 62° 31°/ 17°
40%
Tuesday
Rain Showers
82°/ 62° 28°/ 17°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly clear. Near steady temperature in the mid 70s. Light and variable winds, becoming southeast around 5 mph.

Madison, IL

Overnight
Mostly Cloudy
75°24°
0%
Thursday
Thunderstorms
98°/ 72° 37°/ 22°
20%
Friday
Sunny
95°/ 72° 35°/ 22°
0%
Saturday
Sunny
98°/ 72° 37°/ 22°
40%
Sun Night
Thunderstorms
68°20°
20%
Monday
Thunderstorms
88°/ 65° 31°/ 18°
40%
Tuesday
Rain Showers
82°28°
20%
Wednesday
Rain Showers
82°28°
20%

Night: Mostly cloudy late this evening, then clearing. Near steady temperature in the mid 70s. South winds around 5 mph.

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