Mendota, IL Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Mendota, IL.

Current Conditions — Mendota, IL

ROCHELLE/KORITZ (KRPJ)

Partly Cloudy

65.1 F
Humidity:77%
Wind Speed:W 16.1 mph
Barometer:29.95 in
Dewpoint:57.7 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 22 2026, 08:55 AM CDT
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5-Day Forecast — Mendota, IL

Wednesday

High 80 °F
Mostly Cloudy
Wednesday
Night
Low 59 °F
Partly Cloudy
Thursday

High 80 °F
Partly Sunny
Thursday
Night
Low 60 °F
T-storms Likely
Friday

High 73 °F
T-storms Likely
Friday
Night
Low 50 °F
Mostly Clear
Saturday

High 68 °F
Mostly Sunny
Saturday
Night
Low 46 °F
Mostly Cloudy
Sunday

High 71 °F
Partly Sunny

Detailed Forecast — Mendota, IL

Wednesday
Mostly Cloudy. High near 80°F. Wind 5 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Partly Cloudy. Low around 59°F. Wind 6 to 7 mph, with gusts as high as 13 mph.
Thursday
Partly Sunny. High near 80°F. Wind 9 to 20 mph, with gusts as high as 28 mph.
Thursday Night
Thunderstorms Likely. Low around 60°F. Wind around 15 mph, with gusts as high as 25 mph.
Friday
Thunderstorms Likely. High near 73°F. Wind 10 to 14 mph, with gusts as high as 21 mph.
Friday Night
Mostly Clear. Low around 50°F. Wind around 8 mph, with gusts as high as 15 mph.
Saturday
Mostly Sunny. High near 68°F. Wind 8 to 12 mph, with gusts as high as 18 mph.
Saturday Night
Mostly Cloudy. Low around 46°F. Wind around 5 mph, with gusts as high as 9 mph.
Sunday
Partly Sunny. High near 71°F. Wind 13 to 15 mph, with gusts as high as 24 mph.
Sunday Night
Chance of Thunderstorms. Low around 53°F. Wind around 17 mph, with gusts as high as 28 mph.
Monday
Thunderstorms Likely. High near 73°F. Wind 20 to 22 mph, with gusts as high as 32 mph.
Monday Night
Chance of Rain. Low around 48°F. Wind around 17 mph, with gusts as high as 24 mph.
Tuesday
Partly Sunny. High near 64°F. Wind 10 to 17 mph, with gusts as high as 26 mph.
IL Radar
Current Radar • IL
Day 1 Outlook • April 22, 2026

Observation History — Mendota, IL

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
08:55 AM CDT W 16.1 10.00 Partly Cloudy -- 65.1 57.7 77% NA NA 29.95 1014.2
08:35 AM CDT W 15.0 10.00 Clear -- 64.0 57.9 81% NA NA 29.95 1014.2
08:15 AM CDT 13.9 10.00 Partly Cloudy -- 63.5 57.7 82% NA NA 29.95 1014.2
07:55 AM CDT 13.9 10.00 Partly Cloudy -- 62.6 57.6 84% NA NA 29.95 1014.2
07:35 AM CDT 11.4 10.00 Clear -- 61.7 57.2 85% NA NA 29.95 1014.2
07:15 AM CDT SW 6.9 10.00 Clear -- 60.3 56.5 87% NA NA 29.95 1014.2
06:55 AM CDT SW 8.1 10.00 Clear -- 59.0 55.9 90% NA NA 29.94 1013.9
06:35 AM CDT SW 9.2 10.00 Clear -- 58.5 55.2 89% NA NA 29.94 1013.6
06:15 AM CDT SW 9.2 10.00 Clear -- 58.1 54.7 88% NA NA 29.94 1013.6
05:55 AM CDT SW 9.2 10.00 Clear -- 58.6 54.7 87% NA NA 29.92 1013.2
05:35 AM CDT SW 9.2 10.00 Clear -- 59.2 54.7 85% NA NA 29.91 1012.9
04:55 AM CDT SW 11.4 10.00 Clear -- 59.5 54.5 83% NA NA 29.91 1012.9
04:35 AM CDT SW 10.3 10.00 Clear -- 59.4 54.3 83% NA NA 29.90 1012.5
04:15 AM CDT 8.1 10.00 Clear -- 58.5 53.6 84% NA NA 29.90 1012.5
03:55 AM CDT SW 8.1 10.00 Clear -- 58.3 53.6 84% NA NA 29.90 1012.5
03:35 AM CDT 8.1 10.00 Partly Cloudy -- 58.5 53.6 84% NA NA 29.90 1012.5
03:15 AM CDT 9.2 10.00 Partly Cloudy -- 58.6 53.6 83% NA NA 29.89 1012.2
02:55 AM CDT 5.8 10.00 Clear -- 57.2 52.5 84% NA NA 29.89 1012.2
02:35 AM CDT 3.4 10.00 Clear -- 55.9 52.0 87% NA NA 29.89 1012.2
02:15 AM CDT SW 3.4 10.00 Clear -- NULL 50.0 % NA NA 29.89 1012.2
01:55 AM CDT 5.8 10.00 Clear -- 53.2 50.0 89% NA NA 29.89 1012.2
01:35 AM CDT S 6.9 10.00 Clear -- 53.8 49.6 86% NA NA 29.90 1012.5
01:15 AM CDT S 6.9 10.00 Clear -- 53.6 49.3 85% NA NA 29.90 1012.5
12:55 AM CDT S 4.7 10.00 Clear -- 54.0 49.6 85% NA NA 29.90 1012.5

Regional Weather Observation

ROCHELLE/KORITZ (KRPJ)

Partly Cloudy
65.1 F

STERLING ROCKFAL (KSQI)

Clear
68.0 F

PERU (KVYS)

Partly Cloudy
67.1 F

LACON (KC75)

Mostly Cloudy
65.7 F

ROCKFORD (KRFD)

Mostly Clear
66.2 F

CHICAGO/AURORA (KARR)

Partly Cloudy
66.2 F
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