Monticello, IL Weather


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The most pleasant months of the year for Monticello are September, May and June. In Monticello, there are 5 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Monticello with an average high temperature of 84.2°, which ranks it as cooler than most places in Illinois. January is the snowiest month in Monticello with 4.6 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 - Monticello, IL

2 AM PST

Mostly Cloudy

50°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
OvernightMostly Cloudy49° / 58°SSW 17 mph
Tuesday NightSlight Chance Rain Showers then Partly Cloudy40° / 57°WNW 9 to 13 mph
Wednesday NightPartly Cloudy then Areas Of Frost35° / 65°ENE 10 mph
Thursday NightMostly Cloudy then Chance Rain Showers49° / 71°ESE 12 to 20 mph
Friday NightShowers And Thunderstorms63° / 78°S 25 mph
Saturday NightChance Showers And Thunderstorms64° / 78°S 24 mph
Sunday NightShowers And Thunderstorms Likely57° / 71°SSW 17 to 26 mph

Weather Highlights

Summer High: the July high is around 84 degrees
Winter Low: the January low is 16
Rain: averages 40 inches of rain a year
Snow: averages 15 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Monticello area is 8.6 (10=best), which means it is more comfortable than most places in Illinois.

8.6 / 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
January33° 16°
February38° 21°
March50° 30°
April63° 40°
May74° 51°
June83° 60°
July84° 63°
August83° 61°
September78° 53°
October65° 41°
November50° 32°
December37° 21°
Hot, Freezing, Rainy, Snowy Days: Monticello
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January02973
February02472
March01991
April06110
May11110
June4090
July4080
August3080
September1070
October0680
November01690
December02693

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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