Mendon, IL Weather


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The most pleasant months of the year for Mendon are September, June and May. In Mendon, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Mendon with an average high temperature of 86.0°, which ranks it as about average compared to other places in Illinois. January is the snowiest month in Mendon with 5.5 inches of snow, and 5 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.

Today's Weather - Mendon, IL

11 PM PST

Showers And Thunderstorms

66°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
OvernightShowers And Thunderstorms63° / 73°SE 10 mph
Sunday NightChance Showers And Thunderstorms then Showers And Thunderstorms58° / 69°S 13 to 18 mph
Monday NightMostly Clear51° / 79°SW 5 to 14 mph
Tuesday NightChance Showers And Thunderstorms60° / 80°SW 10 to 18 mph
Wednesday NightChance Showers And Thunderstorms then Showers And Thunderstorms Likely62° / 76°SE 14 mph
Thursday NightShowers And Thunderstorms Likely then Chance Showers And Thunderstorms56° / 70°W 15 mph
Friday NightChance Showers And Thunderstorms51° / 72°NW 12 mph

Weather Highlights

Summer High: the July high is around 86 degrees
Winter Low: the January low is 17
Rain: averages 39 inches of rain a year
Snow: averages 18 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Mendon area is 8.4 (10=best), which means it is more comfortable than most places in Illinois.

8.4 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7.8. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.


Average Monthly High and Low (°F)
HighLow
January34° 17°
February39° 21°
March51° 31°
April63° 42°
May73° 52°
June82° 62°
July86° 66°
August85° 64°
September78° 55°
October66° 44°
November51° 33°
December37° 21°
Hot, Freezing, Rainy, Snowy Days: Mendon
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January02863
February02373
March01891
April04100
May00110
June4090
July8090
August7080
September2070
October0480
November01481
December02673

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

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