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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, like December, in Glen Carbon, Illinois, is another cold winter month, with temperature in the range of an average low of 24.3°F (-4.3°C) and an average high of 37.4°F (3°C). Glen Carbon's January weather, marked by an average high temperature of 37.4°F (3°C) and an average low temperature of 24.3°F (-4.3°C), is the coldest in the year. Weather in January »
Weather in February
February, the last month of the winter in Glen Carbon, is also a wintry month, with an average temperature fluctuating between 27.5°F (-2.5°C) and 42.1°F (5.6°C). As January transitions into February, Glen Carbon records an average high-temperature of a still wintry 42.1°F (5.6°C), showing a gentle shift from the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Glen Carbon, Illinois, with an average temperature fluctuating between 54.1°F (12.3°C) and 37.8°F (3.2°C). The shift into March is accompanied by a temperature increase, with the average high-temperature rising from an icy 42.1°F (5.6°C) in February to a fresh 54.1°F (12.3°C). Weather in March »
Weather in April
April is a refreshing spring month in Glen Carbon, Illinois, with temperature in the range of an average high of 64.9°F (18.3°C) and an average low of 47.8°F (8.8°C). As Glen Carbon transitions into April, the average high-temperature is observed to rise from a cool 54.1°F (12.3°C) in March to an enjoyable 64.9°F (18.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Glen Carbon, Illinois, with temperature in the range of an average high of 74.5°F (23.6°C) and an average low of 57.6°F (14.2°C). The arrival of May sees a shift in the average high-temperature, moving from a refreshing 64.9°F (18.3°C) in April to a warm 74.5°F (23.6°C). Weather in May »
Weather in June
The first month of the summer, June, is also a moderately hot month in Glen Carbon, Illinois, with temperature in the range of an average low of 66.6°F (19.2°C) and an average high of 83.3°F (28.5°C). June comes with a subtle rise, with the average high-temperature adjusting from 74.5°F (23.6°C) in May to a still warm 83.3°F (28.5°C). Weather in June »
Weather in July
July, like June, in Glen Carbon, Illinois, is a moderately hot summer month, with an average temperature ranging between min 68.2°F (20.1°C) and max 85.6°F (29.8°C). The average temperatures reach their apex in July, averaging 85.6°F (29.8°C) at the high end and 68.2°F (20.1°C) at the low end. The average heat index in July is evaluated at a very hot 98.6°F (37°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Glen Carbon, Illinois, with an average temperature ranging between max 84°F (28.9°C) and min 66°F (18.9°C). The commencement of August introduces an average high-temperature of a still warm 84°F (28.9°C), closely mirroring the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Glen Carbon, Illinois, with an average temperature fluctuating between 59.9°F (15.5°C) and 79°F (26.1°C). Glen Carbon's September average high-temperature settles at a still warm 79°F (26.1°C), showing a near match with the preceding month. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Glen Carbon, Illinois, with an average temperature fluctuating between 48.9°F (9.4°C) and 66°F (18.9°C). Start of October brings a shift in the average high-temperature, falling from September's moderately hot 79°F (26.1°C) to a comfortable 66°F (18.9°C). Weather in October »
Weather in November
November, the last month of the autumn in Glen Carbon, is also a fresh month, with an average temperature ranging between max 52.9°F (11.6°C) and min 37.6°F (3.1°C). The transition into November involves a decrease in the average high-temperature, falling from a comfortable 66°F (18.9°C) in October to a cool 52.9°F (11.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Glen Carbon, Illinois, with an average temperature ranging between max 41.9°F (5.5°C) and min 30°F (-1.1°C). The average high-temperature drops in December, from November's cool 52.9°F (11.6°C) to a wintry 41.9°F (5.5°C). Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Glen Carbon?
Glen Carbon's coldest temperatures are experienced in January, with average high temperatures of 37.4°F (3°C) and lows of 24.3°F (-4.3°C).
How much does it rain in Glen Carbon?
In Glen Carbon, Illinois, during the entire year, the rain falls for 149.9 days and collects up to 33.94" (862mm) of precipitation.
When does it snow in Glen Carbon?
Months with snowfall are January through March, September, November and December.
What is the snowiest month in Glen Carbon?
January is the month with the most snowfall in Glen Carbon. Snow falls for 7 days and accumulates 2.13" (54mm) of snow.
How much does it snow in Glen Carbon?
In Glen Carbon, Illinois, during the entire year, snow falls for 20.7 days and aggregates up to 7.13" (181mm) of snow.
What is the month with the least sunshine in Glen Carbon?
The month with the least sunshine is January, with an average of 4.5h of sunshine.
What is the month with the lowest UV index in Glen Carbon?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the driest month in Glen Carbon?
The month with the least rainfall is February, when the rain falls for 8.3 days and typically collects 1.77" (45mm) of precipitation.
When is Daylight Saving Time (DST) in Glen Carbon?
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.
When it does not snow in Glen Carbon?
In Glen Carbon, Illinois, snow does not fall in April through August and October.
What are the most humid months in Glen Carbon?
May, July and August, with an average relative humidity of 79%, are most humid months in Glen Carbon.
What is the wettest month in Glen Carbon?
May is the month with the most rainfall in Glen Carbon. Rain falls for 17.1 days and accumulates 4.17" (106mm) of precipitation.
When is the highest UV index in Glen Carbon?
May through August, with an average maximum UV index of 6, are months with the highest UV index in Glen Carbon, Illinois.
When are the longest days in Glen Carbon?
The month with the longest days is June, with an average of 14h and 48min of daylight.
What month has the most sunshine in Glen Carbon?
The month with the most sunshine is June, with an average of 10.5h of sunshine.
What is the hottest time of year in Glen Carbon?
Glen Carbon's warmest temperatures are experienced in July, with average high temperatures of 85.6°F (29.8°C) and lows of 68.2°F (20.1°C).
What is the least humid month in Glen Carbon?
With an average relative humidity of 71%, October is the least humid month.
What is the month with the shortest days in Glen Carbon?
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Glen Carbon, IL
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.4°F).
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure
Glen Carbon, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"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:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Glen Carbon, IL
- Average wind speed in January:
9.5mph - Average wind speed in February:
9.4mph - Average wind speed in March:
9.3mph - Average wind speed in April:
9.1mph - Average wind speed in May:
7.5mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.6mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.2mph - Average wind speed in October:
8mph - Average wind speed in November:
8.7mph - Average wind speed in December:
8.8mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).
Average humidity
Glen Carbon, IL
The months with the highest relative humidity are May, July and August (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Glen Carbon, IL
- Average rainfall in January:
2.2" - Average rainfall in February:
1.77" - Average rainfall in March:
2.6" - Average rainfall in April:
3.5" - Average rainfall in May:
4.17" - Average rainfall in June:
3.9"
- Average rainfall in July:
3.31" - Average rainfall in August:
3.35" - Average rainfall in September:
2.13" - Average rainfall in October:
2.76" - Average rainfall in November:
2.05" - Average rainfall in December:
2.2"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (1.77").
Average rainfall days
Glen Carbon, IL
- Average rainfall days in January:
7.8 days - Average rainfall days in February:
8.3 days - Average rainfall days in March:
13.9 days - Average rainfall days in April:
15.4 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
15.5 days
- Average rainfall days in July:
16.4 days - Average rainfall days in August:
13.1 days - Average rainfall days in September:
12.3 days - Average rainfall days in October:
11.1 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
8.4 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (7.8 days).
Average snowfall
Glen Carbon, IL
The month with the highest snowfall is January (2.13").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days
Glen Carbon, IL
- Average snowfall days in January:
7 days - Average snowfall days in February:
6 days - Average snowfall days in March:
2.2 days - Average snowfall days in April:
0.3 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:
0.1 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.2 days - Average snowfall days in December:
3.8 days
The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Glen Carbon, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- 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 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 3min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days
Glen Carbon, IL
- Average sunshine days in January:
17 days - Average sunshine days in February:
14.5 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
13.1 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
18.6 days
The month with the most sunshine days is December (18.6 days).
The month with the least sunshine days is May (11.6 days).
Average UV index
Glen Carbon, IL
The months with the highest UV index are May, 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
Glen Carbon, IL
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility
Glen Carbon, IL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Glen Carbon, Illinois, USA
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