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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is another cold winter month in Monticello, Illinois, with an average temperature varying between 20.3°F (-6.5°C) and 32.4°F (0.2°C). Monticello's coldest month, January, registers temperatures that range from a high of 32.4°F (0.2°C) to a low of 20.3°F (-6.5°C). Weather in January »
Weather in February
February, the last month of the winter in Monticello, is also a wintry month, with an average temperature ranging between min 24.3°F (-4.3°C) and max 37.2°F (2.9°C). As January turns into February, the average high-temperatures rest at a still icy 37.2°F (2.9°C), showing a minor variation from the prior month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Monticello, Illinois, with temperature in the range of an average low of 34.9°F (1.6°C) and an average high of 49.6°F (9.8°C). Monticello's transition into March is marked by a temperature shift, moving from an icy 37.2°F (2.9°C) in February to a frosty 49.6°F (9.8°C). Weather in March »
Weather in April
April in Monticello, Illinois, is a comfortable spring month, with an average temperature varying between 61.5°F (16.4°C) and 45.9°F (7.7°C). April comes with an increase, with the average high-temperature moving from a chilly 49.6°F (9.8°C) in March to a comfortable 61.5°F (16.4°C). Weather in April »
Weather in May
May, the last month of the spring in Monticello, is an agreeable month, with an average temperature fluctuating between 72.7°F (22.6°C) and 56.3°F (13.5°C). An increase in the average high-temperature marks May, moving from April's refreshing 61.5°F (16.4°C) to an agreeable 72.7°F (22.6°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Monticello, Illinois, with temperature in the range of an average high of 80.2°F (26.8°C) and an average low of 63.9°F (17.7°C). Monticello's June weather indicates a minor increase in high-temperatures, edging from May's pleasant 72.7°F (22.6°C) to a warm 80.2°F (26.8°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Monticello, Illinois, with temperature in the range of an average low of 64.9°F (18.3°C) and an average high of 81.9°F (27.7°C). In Monticello, July is identified by the highest average temperatures, reaching a peak of 81.9°F (27.7°C) and a low of 64.9°F (18.3°C). In July, the average heat index is appraised at a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Monticello, is also a moderately hot month, with an average temperature varying between 63.3°F (17.4°C) and 81°F (27.2°C). August's weather records an average high-temperature of a still warm 81°F (27.2°C), showing little deviation from July. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Monticello, Illinois, with an average temperature fluctuating between 58.3°F (14.6°C) and 76.6°F (24.8°C). The arrival of September denotes a barely perceptible change in the average high-temperatures to a still moderately hot 76.6°F (24.8°C) from August's 81°F (27.2°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Monticello, Illinois, with an average temperature fluctuating between 48°F (8.9°C) and 63.5°F (17.5°C). As September transitions into October, Monticello sees a drop in the average high-temperature, transitioning from a warm 76.6°F (24.8°C) to an enjoyable 63.5°F (17.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Monticello, Illinois, with temperature in the range of an average low of 36°F (2.2°C) and an average high of 49.1°F (9.5°C). As Monticello transitions into November, the average high-temperature shows a marked reduction, decreasing from a comfortable 63.5°F (17.5°C) in October to a chilly 49.1°F (9.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Monticello, Illinois, with an average temperature fluctuating between 37.9°F (3.3°C) and 27.5°F (-2.5°C). The beginning of December marks a decrease in the average high-temperature, transitioning from a chilly 49.1°F (9.5°C) in November to an icy 37.9°F (3.3°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Monticello?
The month of January, characterized by an average high of 32.4°F (0.2°C) and a low of 20.3°F (-6.5°C), is recognized as the coldest in Monticello, Illinois.
How many days does it rain in Monticello?
In Monticello, Illinois, during the entire year, the rain falls for 127.9 days and collects up to 16.61" (422mm) of precipitation.
When does it snow in Monticello?
January through April, November and December are months with snowfall.
When does it snow the most in Monticello?
January is the month with the most snowfall. Snow falls for 8.3 days and accumulates 2.05" (52mm) of snow.
How many days does it snow in Monticello?
Throughout the year, in Monticello, there are 23.2 snowfall days, and 5.83" (148mm) of snow is accumulated.
What is the month with the least sunshine in Monticello?
The month with the least sunshine in Monticello, Illinois, is January, with an average of 3.9h of sunshine.
What are the months with the lowest UV index in Monticello?
The months with the lowest UV index in Monticello, Illinois, are January, February, November and December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST) in Monticello?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the rainiest month in Monticello?
The month with the most rainfall is May, when the rain falls for 16.3 days and typically aggregates up to 2.09" (53mm) of precipitation.
When it does not snow in Monticello?
May through October are months without snowfall.
When are the longest days in Monticello?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What month has the most sunshine in Monticello?
June has the most sunshine of the year, with an average of 10.1h of sunshine.
When is the highest UV index in Monticello?
The months with the highest UV index in Monticello, Illinois, are June through August, with an average maximum UV index of 6.
What part of the year is the hottest in Monticello?
The month of July, characterized by an average high of 81.9°F (27.7°C) and a low of 64.9°F (18.3°C), is recognized as the warmest.
What is the most humid month in Monticello?
With an average relative humidity of 85%, July is the most humid month in Monticello, Illinois.
What is the least humid month in Monticello?
The least humid month in Monticello is October, with an average relative humidity of 70%.
What is the driest month in Monticello?
December is the month with the least rainfall. Rain falls for 7.4 days and accumulates 0.91" (23mm) of precipitation.
What is the month with the shortest days in Monticello?
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Monticello, IL
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (32.4°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure
Monticello, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Monticello, IL
- Average wind speed in January:
10.9mph - Average wind speed in February:
10.8mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.4mph - Average wind speed in October:
9.6mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10.2mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Monticello, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Monticello, IL
- Average rainfall in January:
1.1" - Average rainfall in February:
0.94" - Average rainfall in March:
1.54" - Average rainfall in April:
1.97" - Average rainfall in May:
2.09" - Average rainfall in June:
1.93"
- Average rainfall in July:
1.5" - Average rainfall in August:
1.54" - Average rainfall in September:
0.98" - Average rainfall in October:
1.18" - Average rainfall in November:
0.94" - Average rainfall in December:
0.91"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is December (0.91").
Average rainfall days
Monticello, IL
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
5.2 days - Average rainfall days in March:
11.2 days - Average rainfall days in April:
12.6 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
14.9 days - Average rainfall days in August:
12.4 days - Average rainfall days in September:
10.2 days - Average rainfall days in October:
9.6 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
7.4 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (5.2 days).
Average snowfall
Monticello, IL
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Monticello, IL
- Average snowfall days in January:
8.3 days - Average snowfall days in February:
5.8 days - Average snowfall days in March:
2.5 days - Average snowfall days in April:
0.6 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
4.5 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Monticello, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 0min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Monticello, IL
- Average sunshine days in January:
18.8 days - Average sunshine days in February:
17.6 days - Average sunshine days in March:
16.9 days - Average sunshine days in April:
15.2 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
12.9 days
- Average sunshine days in July:
13.3 days - Average sunshine days in August:
15.9 days - Average sunshine days in September:
17.6 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
19.6 days - Average sunshine days in December:
19.1 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.3 days).
Average UV index
Monticello, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Monticello, IL
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are June, August and September (Cloud cover 32).
Average visibility
Monticello, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Monticello, Illinois, USA
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