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, 20:18
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Mackinaw, IL Regional Weather

Expires:202609172100;;619839
ASUS43 KLOT 172012
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
300 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>061-172100-
CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PONTIAC        SUNNY     91  73  57 SW8       30.14F HX  99  TC  33   
BLOOMINGTON    SUNNY     91  75  59 S10       30.16F HX 101  TC  33   
DECATUR        SUNNY     94  72  48 SW6       30.16F HX 102  TC  34   
PEORIA         SUNNY     90  74  59 VRB3      30.14F HX  99  TC  32   
LACON*         SUNNY     87  73  62 SW7       30.14F HX  94  TC  31   
LINCOLN*       MOSUNNY   95  73  49 SW3       30.14  HX 104  TC  35   
SPRINGFIELD    SUNNY     96  72  45 NW6       30.14F HX 104  TC  36   
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

Afternoon
Sunny
88°/ 68° 31°/ 20°
20%
Friday
Rain Showers
82°/ 68° 28°/ 20°
40%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
70%
Sunday
Thunderstorms
78°/ 62° 26°/ 17°
60%
Monday
Thunderstorms
68°/ 58° 20°/ 14°
70%
Tuesday
Partly Cloudy
68°/ 55° 20°/ 13°
0%

Day: Sunny. Near steady temperature in the upper 80s. West winds around 5 mph. Heat index values up to 106.

Night: Mostly clear in the evening, then becoming mostly cloudy. 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.

Eureka, IL

Afternoon
Sunny
88°/ 68° 31°/ 20°
20%
Friday
Rain Showers
80°/ 68° 27°/ 20°
40%
Saturday
Thunderstorms
85°/ 68° 29°/ 20°
80%
Sunday
Thunderstorms
78°26°
70%
Sun Night-Mon
Thunderstorms
60°16°
60%
Mon Night
Rain Showers
55°13°
50%
Tuesday
Partly Cloudy
65°/ 52° 18°/ 11°
0%

Day: Mostly sunny. Near steady temperature in the upper 80s. West winds around 5 mph. Heat index values up to 102.

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

Bloomington, IL

Afternoon
Sunny
88°/ 68° 31°/ 20°
20%
Friday
Rain Showers
82°/ 68° 28°/ 20°
40%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
70%
Sunday
Thunderstorms
78°26°
50%
Sun Night-Mon
Thunderstorms
62°17°
60%
Mon Night
Rain Showers
55°13°
50%
Tue-Tue Night
Mostly Cloudy
68°20°
0%
Wednesday
Sunny
72°22°
0%

Day: Sunny. Near steady temperature in the upper 80s. West winds 5 to 10 mph. Heat index values up to 104.

Night: Partly cloudy in the evening, then becoming mostly cloudy. 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.

Peoria, IL

Afternoon
Sunny
88°/ 68° 31°/ 20°
20%
Friday
Rain Showers
80°/ 68° 27°/ 20°
50%
Saturday
Thunderstorms
85°/ 68° 29°/ 20°
80%
Sunday
Thunderstorms
75°/ 62° 24°/ 17°
70%
Monday
Rain Showers
68°/ 58° 20°/ 14°
70%
Tuesday
Partly Cloudy
65°/ 52° 18°/ 11°
0%

Day: Mostly sunny. Near steady temperature in the upper 80s. West winds around 5 mph. Heat index values up to 101.

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

Lincoln, IL

Afternoon
Sunny
92°/ 68° 33°/ 20°
20%
Friday
Rain Showers
85°/ 68° 29°/ 20°
30%
Saturday
Partly Cloudy
92°/ 68° 33°/ 20°
50%
Sun Night-Mon
Thunderstorms
62°17°
60%
Mon Night
Rain Showers
58°14°
50%
Tue-Tue Night
Mostly Cloudy
68°20°
0%
Wednesday
Sunny
72°22°
0%

Day: Sunny. Near steady temperature in the lower 90s. West winds 5 to 10 mph. Heat index values up to 104.

Night: Mostly clear in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Humid with lows in the upper 60s. North winds 5 to 10 mph, becoming northeast after midnight. Chance of rain 20 percent.

Havana, IL

Afternoon
Sunny
92°/ 68° 33°/ 20°
20%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
40%
Saturday
Mostly Cloudy
90°/ 68° 32°/ 20°
60%
Sunday
Thunderstorms
82°/ 62° 28°/ 17°
60%
Monday
Rain Showers
72°/ 55° 22°/ 13°
70%
Tue Night
Mostly Cloudy
55°13°
0%
Wednesday
Sunny
72°22°
0%

Day: Sunny. Near steady temperature in the lower 90s. West winds around 5 mph. Heat index values up to 106.

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

Clinton, IL

Afternoon
Sunny
88°/ 68° 31°/ 20°
30%
Friday
Rain Showers
85°/ 68° 29°/ 20°
30%
Saturday
Partly Cloudy
88°/ 68° 31°/ 20°
50%
Sun Night
Thunderstorms
62°17°
50%
Monday
Thunderstorms
72°/ 58° 22°/ 14°
60%
Tue-Tue Night
Mostly Cloudy
68°20°
0%
Wednesday
Sunny
72°22°
0%

Day: Sunny. Near steady temperature in the upper 80s. West winds around 10 mph. Heat index values up to 101.

Night: Mostly clear in the evening, then becoming mostly cloudy. A chance of thunderstorms with a slight chance of showers. Humid with lows in the upper 60s. North winds 5 to 10 mph, becoming northeast after midnight. Chance of rain 30 percent.

Lacon, IL

Afternoon
Sunny
85°/ 65° 29°/ 18°
20%
Friday
Rain Showers
78°/ 68° 26°/ 20°
50%
Saturday
Thunderstorms
85°/ 68° 29°/ 20°
80%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
70%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tuesday
Partly Cloudy
65°/ 52° 18°/ 11°
0%
Wednesday
Partly Cloudy
70°21°
0%

Day: Mostly sunny. Near steady temperature in the mid 80s. West winds around 5 mph.

Night: Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of thunderstorms in the evening. A slight chance of showers. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 20 percent.

Canton, IL

Afternoon
Sunny
88°/ 68° 31°/ 20°
20%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
50%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
70%
Sun Night
Thunderstorms
62°17°
60%
Monday
Rain Showers
68°/ 58° 20°/ 14°
70%
Tuesday
Mostly Cloudy
68°20°
0%
Wednesday
Mostly Cloudy
68°20°
0%

Day: Sunny. Near steady temperature in the upper 80s. West winds around 5 mph. Heat index values up to 105.

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.

Petersburg, IL

Afternoon
Sunny
92°/ 68° 33°/ 20°
40%
Friday
Thunderstorms
88°/ 70° 31°/ 21°
40%
Saturday
Partly Cloudy
92°/ 68° 33°/ 20°
50%
Sun Night
Thunderstorms
62°17°
60%
Monday
Rain Showers
72°/ 55° 22°/ 13°
60%
Tue Night
Mostly Cloudy
55°13°
0%
Wednesday
Sunny
75°24°
0%

Day: Sunny. Near steady temperature in the lower 90s. West winds around 5 mph. Heat index values up to 104.

Night: Mostly clear in the evening, then becoming partly cloudy. A chance of thunderstorms. A chance of showers, mainly in the evening. Humid with lows in the upper 60s. North winds around 5 mph. Chance of rain 40 percent.

Toulon, IL

Afternoon
Partly Cloudy
85°/ 65° 29°/ 18°
20%
Friday
Rain Showers
78°/ 68° 26°/ 20°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
80%
Sunday
Thunderstorms
72°/ 60° 22°/ 16°
70%
Monday
Rain Showers
65°/ 55° 18°/ 13°
60%
Tuesday
Partly Cloudy
65°/ 52° 18°/ 11°
0%

Day: Partly sunny and warmer. Near steady temperature in the mid 80s. West winds around 5 mph.

Night: Partly cloudy in the evening, then mostly cloudy with a slight chance of showers after midnight. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 20 percent.

Pontiac, IL

Afternoon
Thunderstorms
88°/ 65° 31°/ 18°
30%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
82°/ 68° 28°/ 20°
90%
Sunday
Thunderstorms
78°/ 58° 26°/ 14°
60%
Monday
Thunderstorms
68°/ 55° 20°/ 13°
60%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Mostly Cloudy
72°22°
0%

Day: Partly cloudy. A slight chance of showers and thunderstorms late. Highs in the upper 80s. West winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A chance of showers and thunderstorms early in the evening, then a slight chance of thunderstorms late in the evening. A slight chance of showers in the late evening and overnight. Humid with lows in the mid 60s. Northeast winds around 5 mph. Chance of precipitation 30 percent.

Ottawa, IL

Afternoon
Thunderstorms
82°/ 65° 28°/ 18°
20%
Friday
Thunderstorms
75°/ 65° 24°/ 18°
50%
Saturday
Thunderstorms
80°/ 65° 27°/ 18°
90%
Sunday
Thunderstorms
72°/ 58° 22°/ 14°
70%
Monday
Rain Showers
65°/ 55° 18°/ 13°
60%
Tuesday
Rain Showers
65°/ 52° 18°/ 11°
30%
Wednesday
Mostly Cloudy
70°21°
0%

Day: Mostly cloudy. A slight chance of showers and thunderstorms or patchy drizzle late. Highs in the lower 80s. Northwest winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers and thunderstorms in the evening. A slight chance of showers late. Humid with lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Galesburg, IL

Afternoon
Sunny
85°/ 65° 29°/ 18°
20%
Friday
Rain Showers
80°/ 68° 27°/ 20°
50%
Saturday
Thunderstorms
85°/ 68° 29°/ 20°
80%
Sunday
Thunderstorms
75°/ 60° 24°/ 16°
70%
Monday
Rain Showers
65°/ 55° 18°/ 13°
70%
Tuesday
Partly Cloudy
65°/ 52° 18°/ 11°
0%
Wednesday
Partly Cloudy
68°20°
0%

Day: Mostly sunny. Near steady temperature in the mid 80s. West winds around 5 mph. Heat index values up to 100.

Night: Partly cloudy in the evening, then mostly cloudy with 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.

Decatur, IL

Afternoon
Sunny
92°/ 68° 33°/ 20°
20%
Friday
Thunderstorms
88°/ 68° 31°/ 20°
20%
Saturday
Sunny
92°/ 70° 33°/ 21°
40%
Sunday
Thunderstorms
85°/ 65° 29°/ 18°
50%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
60%
Tue-Tue Night
Mostly Cloudy
70°21°
0%
Wednesday
Sunny
75°24°
0%

Day: Sunny, hot. Near steady temperature in the lower 90s. West winds 5 to 10 mph. Heat index values up to 104.

Night: Mostly clear in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Humid with lows in the upper 60s. North winds 5 to 10 mph, becoming northeast after midnight. Chance of rain 20 percent.

Hennepin, IL

Afternoon
Thunderstorms
82°/ 65° 28°/ 18°
20%
Friday
Rain Showers
78°/ 68° 26°/ 20°
50%
Saturday
Thunderstorms
85°/ 68° 29°/ 20°
90%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
60%
Monday
Rain Showers
65°/ 55° 18°/ 13°
60%
Tuesday
Rain Showers
65°/ 52° 18°/ 11°
40%
Wednesday
Partly Cloudy
70°21°
0%

Day: Partly sunny with a slight chance of showers and thunderstorms. Near steady temperature in the lower 80s. West winds around 5 mph. Chance of rain 20 percent.

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

Springfield, IL

Afternoon
Sunny
95°/ 70° 35°/ 21°
20%
Friday
Thunderstorms
90°/ 70° 32°/ 21°
20%
Saturday
Sunny
92°/ 70° 33°/ 21°
40%
Sun-Sun Night
Thunderstorms
88°31°
50%
Monday
Thunderstorms
78°/ 58° 26°/ 14°
60%
Tue Night
Mostly Cloudy
58°14°
0%
Wednesday
Sunny
75°24°
0%

Day: Sunny, hot. Near steady temperature in the mid 90s. West winds around 5 mph. Heat index values up to 106.

Night: Mostly clear in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Humid with lows around 70. Northwest winds around 5 mph, becoming northeast after midnight. Chance of rain 20 percent.

Princeton, IL

Afternoon
Thunderstorms
82°/ 65° 28°/ 18°
20%
Friday
Rain Showers
75°/ 65° 24°/ 18°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
90%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
70%
Monday
Rain Showers
65°/ 55° 18°/ 13°
70%
Tuesday
Rain Showers
65°/ 52° 18°/ 11°
40%
Wednesday
Partly Cloudy
68°20°
0%

Day: Partly sunny with a slight chance of showers and thunderstorms. Near steady temperature in the lower 80s. Northwest winds around 5 mph. Chance of rain 20 percent.

Night: Mostly cloudy. Humid with lows in the mid 60s. Northeast winds 5 to 10 mph.

Monticello, IL

Afternoon
Sunny
92°/ 68° 33°/ 20°
40%
Friday
Rain Showers
85°/ 68° 29°/ 20°
20%
Saturday
Partly Cloudy
90°/ 68° 32°/ 20°
50%
Sun Night
Thunderstorms
62°17°
50%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
60%
Tue-Tue Night
Mostly Cloudy
70°21°
0%
Wednesday
Sunny
72°22°
0%

Day: Sunny. Near steady temperature in the lower 90s. West winds 5 to 10 mph. Heat index values up to 102.

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

Champaign, IL

Afternoon
Sunny
88°/ 68° 31°/ 20°
40%
Friday
Rain Showers
82°/ 65° 28°/ 18°
40%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
50%
Sunday
Rain Showers
82°/ 62° 28°/ 17°
50%
Monday
Thunderstorms
72°/ 58° 22°/ 14°
60%
Tuesday
Mostly Cloudy
72°22°
0%
Wednesday
Mostly Cloudy
72°22°
0%

Day: Sunny. Near steady temperature in the upper 80s. West winds 5 to 10 mph. Heat index values up to 100.

Night: Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Humid with lows in the upper 60s. North winds 5 to 10 mph. Chance of rain 40 percent.

Names listed above may include county names.

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