Mackinaw, IL Weather Forecast & Current Conditions

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Mackinaw, IL Weather Maps

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Mackinaw Weather Map
UTC Time: 9/17/2026, 17:12
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Mackinaw, IL Regional Weather

Expires:202609171800;;610242
ASUS43 KLOT 171710
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1200 PM CDT THU SEP 17 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.


ILZ028>032-037-038-041>044-048-051>054-059>061-171800-
CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PONTIAC        MOSUNNY   81  75  80 S8        30.21F HX  87  TC  27   
BLOOMINGTON    SUNNY     84  74  71 SE7       30.24F HX  91  TC  29   
DECATUR        SUNNY     91  74  57 N9        30.23F HX 100  TC  33   
PEORIA         SUNNY     82  73  74 VRB6      30.21F HX  87  TC  28   
LACON*         MOSUNNY   81  72  74 S6        30.20F HX  85  TC  27   
SPRINGFIELD    SUNNY     91  72  53 VRB6      30.21F HX  98  TC  33   
TAYLORVILLE    NOT AVBL                                               
$$


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

Mackinaw, IL

Today
Rain Showers
88°/ 68° 31°/ 20°
20%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
40%
Saturday
Mostly Cloudy
90°/ 68° 32°/ 20°
70%
Sunday
Thunderstorms
78°26°
50%
Sun Night-Mon
Thunderstorms
62°17°
60%
Mon Night
Rain Showers
58°14°
40%
Tuesday
Partly Cloudy
72°/ 55° 22°/ 13°
0%

Day: Partly sunny. Isolated showers late this morning. Highs in the upper 80s. East winds around 5 mph, becoming west this afternoon. Chance of rain 20 percent.

Night: Partly cloudy in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Eureka, IL

Today
Rain Showers
85°/ 65° 29°/ 18°
30%
Friday
Rain Showers
82°/ 68° 28°/ 20°
40%
Saturday
Mostly Cloudy
88°/ 68° 31°/ 20°
70%
Sun Night-Mon
Thunderstorms
60°16°
60%
Mon Night-Tue
Mostly Cloudy
55°13°
0%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy with isolated showers late this morning, then partly sunny this afternoon. Highs in the mid 80s. East winds around 5 mph, becoming northwest this afternoon. Chance of rain 20 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Humid with lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 30 percent.

Bloomington, IL

Today
Rain Showers
88°/ 68° 31°/ 20°
40%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
40%
Saturday
Mostly Cloudy
90°/ 68° 32°/ 20°
70%
Sunday
Rain Showers
80°/ 62° 27°/ 17°
50%
Monday
Thunderstorms
72°/ 55° 22°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy late this morning, then becoming partly sunny. Isolated showers late this morning. Patchy fog late this morning. Highs in the upper 80s. Northeast winds 5 to 10 mph, becoming west this afternoon. Chance of rain 20 percent.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds 5 to 10 mph. Chance of rain 40 percent.

Peoria, IL

Today
Rain Showers
85°/ 65° 29°/ 18°
20%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
50%
Saturday
Mostly Cloudy
88°/ 68° 31°/ 20°
70%
Sun Night
Thunderstorms
62°17°
60%
Monday
Rain Showers
70°/ 58° 21°/ 14°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy late this morning, then becoming partly sunny. Isolated showers late this morning. Highs in the mid 80s. East winds around 5 mph, becoming west this afternoon. Chance of rain 20 percent.

Night: Mostly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 20 percent.

Lincoln, IL

Today
Partly Cloudy
92°/ 68° 33°/ 20°
30%
Friday
Thunderstorms
88°/ 68° 31°/ 20°
30%
Saturday
Partly Cloudy
92°/ 68° 33°/ 20°
50%
Sunday
Rain Showers
82°/ 62° 28°/ 17°
50%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
60%
Tuesday
Cloudy
75°24°
0%
Wednesday
Cloudy
75°24°
0%

Day: Partly sunny. Highs in the lower 90s. Northeast winds 5 to 10 mph, becoming southwest this afternoon. Heat index values up to 103.

Night: Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds 5 to 10 mph. Chance of rain 30 percent.

Havana, IL

Today
Partly Cloudy
92°/ 68° 33°/ 20°
20%
Friday
Thunderstorms
88°/ 68° 31°/ 20°
30%
Saturday
Partly Cloudy
92°/ 68° 33°/ 20°
60%
Sunday
Rain Showers
82°/ 62° 28°/ 17°
60%
Monday
Rain Showers
72°/ 58° 22°/ 14°
60%
Tuesday
Partly Cloudy
72°/ 55° 22°/ 13°
0%
Wednesday
Sunny
75°24°
0%

Day: Partly sunny. Highs in the lower 90s. Northeast winds around 5 mph, becoming southwest this afternoon. Heat index values up to 102.

Night: Mostly clear in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 20 percent.

Clinton, IL

Today
Rain Showers
92°/ 68° 33°/ 20°
30%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
30%
Saturday
Partly Cloudy
92°/ 68° 33°/ 20°
50%
Sunday
Rain Showers
82°/ 62° 28°/ 17°
50%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
60%
Tuesday
Cloudy
75°24°
0%
Wednesday
Cloudy
75°24°
0%

Day: Partly sunny. Isolated showers late this morning. Highs in the lower 90s. North winds around 10 mph, becoming southwest this afternoon. Chance of rain 20 percent. Heat index values up to 102.

Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds 5 to 10 mph. Chance of rain 30 percent.

Lacon, IL

Today
Rain Showers
85°/ 65° 29°/ 18°
30%
Friday
Rain Showers
80°/ 68° 27°/ 20°
40%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
70%
Sun Night
Thunderstorms
58°14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy. Isolated showers late this morning. Patchy fog late this morning. Highs in the mid 80s. South winds around 5 mph, becoming northwest this afternoon. Chance of rain 20 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 30 percent.

Canton, IL

Today
Partly Cloudy
88°/ 68° 31°/ 20°
20%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
30%
Saturday
Mostly Cloudy
88°/ 68° 31°/ 20°
70%
Sunday
Thunderstorms
78°/ 62° 26°/ 17°
60%
Monday
Rain Showers
70°/ 58° 21°/ 14°
60%
Tuesday
Partly Cloudy
70°/ 55° 21°/ 13°
0%

Day: Partly sunny. Highs in the upper 80s. East winds around 5 mph, becoming southwest this afternoon. Heat index values up to 100.

Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 20 percent.

Petersburg, IL

Today
Partly Cloudy
95°/ 68° 35°/ 20°
30%
Friday
Thunderstorms
88°/ 70° 31°/ 21°
30%
Saturday
Partly Cloudy
92°/ 68° 33°/ 20°
50%
Sunday
Rain Showers
85°/ 62° 29°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
60%
Tuesday
Sunny
75°/ 55° 24°/ 13°
0%
Wednesday
Sunny
78°26°
0%

Day: Partly sunny. Highs in the mid 90s. North winds around 5 mph, becoming southwest this afternoon. Heat index values up to 102.

Night: Mostly clear in the evening, then partly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 30 percent.

Toulon, IL

Today
Rain Showers
82°/ 65° 28°/ 18°
30%
Friday
Rain Showers
78°/ 68° 26°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sun Night
Thunderstorms
58°14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy. Isolated showers late this morning. Highs in the lower 80s. Southeast winds around 5 mph, becoming northwest this afternoon. Chance of rain 20 percent.

Night: Mostly cloudy. A chance of showers after midnight. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 30 percent.

Pontiac, IL

Today
Thunderstorms
85°/ 65° 29°/ 18°
50%
Friday
Rain Showers
82°/ 65° 28°/ 18°
40%
Saturday
Thunderstorms
88°/ 68° 31°/ 20°
70%
Sunday
Thunderstorms
78°/ 58° 26°/ 14°
60%
Monday
Thunderstorms
72°/ 55° 22°/ 13°
60%
Tuesday
Mostly Cloudy
72°/ 55° 22°/ 13°
0%
Wednesday
Cloudy
75°24°
0%

Day: Mostly cloudy late in the morning, then becoming partly cloudy. A chance of showers late in the morning. A slight chance of showers and thunderstorms late. Highs in the mid 80s. Southwest winds around 5 mph, becoming northwest in the afternoon. Chance of precipitation 50 percent.

Night: Mostly cloudy. A slight chance of showers in the evening. A slight chance of thunderstorms. A chance of showers after midnight. Humid with lows in the mid 60s. Northeast winds around 5 mph. Chance of precipitation 40 percent.

Ottawa, IL

Today
Thunderstorms
82°/ 65° 28°/ 18°
50%
Friday
Rain Showers
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Thunderstorms
75°/ 58° 24°/ 14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tuesday
Mostly Cloudy
70°/ 55° 21°/ 13°
0%
Wednesday
Cloudy
75°24°
0%

Day: Mostly cloudy. A chance of showers late in the morning. A slight chance of showers and thunderstorms late. Highs in the lower 80s. South winds around 5 mph, becoming northwest in the afternoon. Chance of precipitation 50 percent.

Night: Mostly cloudy. A slight chance of showers after midnight. Lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Galesburg, IL

Today
Rain Showers
82°/ 65° 28°/ 18°
20%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
50%
Saturday
Mostly Cloudy
88°/ 65° 31°/ 18°
70%
Sun Night
Thunderstorms
60°16°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy late this morning, then becoming partly sunny. Isolated showers late this morning. Patchy fog late this morning. Highs in the lower 80s. Southeast winds around 5 mph, becoming west this afternoon. Chance of rain 20 percent.

Night: Mostly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 20 percent.

Decatur, IL

Today
Sunny
95°/ 68° 35°/ 20°
20%
Friday
Thunderstorms
88°/ 68° 31°/ 20°
30%
Saturday
Sunny
92°/ 70° 33°/ 21°
50%
Sunday
Rain Showers
85°/ 62° 29°/ 17°
50%
Monday
Thunderstorms
78°/ 58° 26°/ 14°
60%
Tuesday
Cloudy
78°26°
0%
Wednesday
Cloudy
78°26°
0%

Day: Mostly sunny. Highs in the mid 90s. Northwest winds 5 to 10 mph, becoming southwest this afternoon. Heat index values up to 102.

Night: Partly cloudy with a slight chance of showers and thunderstorms. Humid with lows in the upper 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Hennepin, IL

Today
Thunderstorms
82°/ 65° 28°/ 18°
50%
Friday
Rain Showers
78°/ 68° 26°/ 20°
50%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
70%
Sun Night
Thunderstorms
58°14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy. A chance of showers with a slight chance of thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Highs in the lower 80s. Southeast winds around 5 mph, becoming northwest this afternoon. Chance of rain 50 percent.

Night: Mostly cloudy. A slight chance of showers after midnight. Humid with lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Springfield, IL

Today
Sunny
95°/ 70° 35°/ 21°
20%
Friday
Thunderstorms
90°/ 70° 32°/ 21°
30%
Saturday
Partly Cloudy
95°/ 70° 35°/ 21°
50%
Sunday
Rain Showers
85°/ 65° 29°/ 18°
50%
Monday
Rain Showers
78°/ 58° 26°/ 14°
60%
Tuesday
Cloudy
78°26°
0%
Wednesday
Cloudy
78°26°
0%

Day: Mostly sunny. Hot with highs in the mid 90s. West winds around 5 mph. Heat index values up to 104.

Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows around 70. Northeast winds around 5 mph. Chance of rain 20 percent.

Princeton, IL

Today
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Rain Showers
78°/ 65° 26°/ 18°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sun Night
Thunderstorms
58°14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy. A chance of showers with a slight chance of thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Highs around 80. Southeast winds around 5 mph, becoming northwest this afternoon. Chance of rain 50 percent.

Night: Mostly cloudy. A slight chance of showers after midnight. Humid with lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Monticello, IL

Today
Partly Cloudy
92°/ 68° 33°/ 20°
20%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
30%
Saturday
Sunny
92°/ 70° 33°/ 21°
50%
Sunday
Rain Showers
85°29°
50%
Sun Night-Mon
Thunderstorms
62°17°
50%
Mon Night
Rain Showers
58°14°
50%
Tuesday
Cloudy
75°24°
0%
Wednesday
Cloudy
75°24°
0%

Day: Partly sunny. Highs in the lower 90s. North winds around 10 mph, becoming west this afternoon. Heat index values up to 103.

Night: Partly cloudy with a slight chance of showers and thunderstorms. Humid with lows in the upper 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Champaign, IL

Today
Rain Showers
92°/ 68° 33°/ 20°
40%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
40%
Saturday
Sunny
92°/ 68° 33°/ 20°
50%
Sunday
Rain Showers
82°28°
50%
Sun Night-Mon
Thunderstorms
62°17°
50%
Mon Night
Rain Showers
58°14°
50%
Tuesday
Partly Cloudy
75°/ 58° 24°/ 14°
0%

Day: Partly sunny. Isolated showers late this morning. Highs in the lower 90s. North winds 5 to 10 mph, becoming west this afternoon. Chance of rain 20 percent. Heat index values up to 103.

Night: Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Humid with lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 40 percent.

Names listed above may include county names.

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