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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 Carterville, Illinois, is an icy winter month, with an average temperature varying between 26.1°F (-3.3°C) and 39.6°F (4.2°C). With its high average temperature of 39.6°F (4.2°C) and a low of 26.1°F (-3.3°C), January is regarded as the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a chilly month in Carterville, Illinois, with an average temperature fluctuating between 43.7°F (6.5°C) and 29.8°F (-1.2°C). The average high-temperature during February is a chilly 43.7°F (6.5°C), almost matching the conditions of the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Carterville, is a fresh month, with temperature in the range of an average high of 55.2°F (12.9°C) and an average low of 38.8°F (3.8°C). As Carterville, Illinois, transitions into March, the average high-temperature shows a change, moving from a frosty 43.7°F (6.5°C) in February to a cool 55.2°F (12.9°C). Weather in March »
Weather in April
April in Carterville, Illinois, is a refreshing spring month, with an average temperature varying between 48.7°F (9.3°C) and 66.4°F (19.1°C). April signals a shift in the average high-temperature, moving from March's fresh 55.2°F (12.9°C) to a refreshing 66.4°F (19.1°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Carterville, Illinois, with an average temperature ranging between min 58.1°F (14.5°C) and max 75.4°F (24.1°C). May's onset brings a rise in the average high-temperature, moving from a comfortable 66.4°F (19.1°C) in April to a moderately hot 75.4°F (24.1°C). Weather in May »
Weather in June
The first month of the summer, June, is also a moderately hot month in Carterville, Illinois, with an average temperature fluctuating between 66.4°F (19.1°C) and 84.7°F (29.3°C). With the onset of June, Carterville's average high-temperature experiences a rise, moving from May's warm 75.4°F (24.1°C) to a still moderately hot 84.7°F (29.3°C). Weather in June »
Weather in July
July in Carterville, Illinois, is a hot summer month, with an average temperature fluctuating between 87.4°F (30.8°C) and 68.5°F (20.3°C). July tends to be the warmest month, with temperatures averaging a daily high of 87.4°F (30.8°C) and a low of 68.5°F (20.3°C). The heat index value during July is computed to be a very hot 102.2°F (39°C). Weather in July »
Weather in August
August, the last month of the summer in Carterville, is another warm month, with an average temperature ranging between min 66.4°F (19.1°C) and max 85.6°F (29.8°C). The beginning of August records an average high-temperature of a moderately hot 85.6°F (29.8°C), marking a negligible difference from July's 87.4°F (30.8°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Carterville, Illinois, with an average temperature varying between 80.8°F (27.1°C) and 60.4°F (15.8°C). The high-temperature average in September for Carterville, Illinois, is a still moderately hot 80.8°F (27.1°C), staying closely aligned with August's conditions. Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Carterville, Illinois, with an average temperature varying between 67.3°F (19.6°C) and 49.3°F (9.6°C). The average high-temperature drops in October, from September's warm 80.8°F (27.1°C) to an enjoyable 67.3°F (19.6°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Carterville, Illinois, with an average temperature ranging between max 53.8°F (12.1°C) and min 38.5°F (3.6°C). In Carterville, the average high-temperature in November drops from an enjoyable 67.3°F (19.6°C) in October to a cool 53.8°F (12.1°C). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Carterville, Illinois, with temperature in the range of an average low of 31.8°F (-0.1°C) and an average high of 43.9°F (6.6°C). The shift from November to December corresponds with a decrease in the average high-temperature, down to a chilly 43.9°F (6.6°C) from a cool 53.8°F (12.1°C). Weather in December »
Updated: Jul 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 time of the year is the coldest?
Temperature readings in Carterville reach their annual highs in January, averaging 39.6°F (4.2°C) and a minimum average of 26.1°F (-3.3°C).
How many days does it rain?
In Carterville, during the entire year, the rain falls for 137.6 days and collects up to 23.03" (585mm) of precipitation.
When does it snow?
Months with snowfall are January through April, October through December.
What is the snowiest month?
The months with the most snowfall are January and February, with an average 0.94" (24mm) of accumulated snow.
How much does it snow?
In Carterville, during the entire year, snow falls for 14.5 days and aggregates up to 4.13" (105mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.6h of sunshine.
What are the months with the lowest UV index?
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index.
When is Daylight Saving Time (DST)?
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 wettest month?
The month with the most rainfall is April, when the rain falls for 13.8 days and typically aggregates up to 3.11" (79mm) of precipitation.
What is the most humid month?
The most humid month is May, with an average relative humidity of 79%.
When it does not snow?
In Carterville, snow does not fall in May through September.
What are the months with the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days?
With an average of 14h and 42min of daylight, June has the longest days of the year in Carterville.
What is the month with the most sunshine?
June and July, with an average of 10.5h of sunshine, are months with the most sunshine.
What part of the year is the hottest?
In Carterville, July registers the highest temperatures, averaging 87.4°F (30.8°C) at the peak and 68.5°F (20.3°C) at the lowest.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 10.5 days and typically collects 1.1" (28mm) of precipitation.
What is the least humid month?
October is the least humid month, with an average relative humidity of 71%.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 36min of daylight.
Average temperature
Carterville, IL
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure
Carterville, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Carterville, IL
- Average wind speed in January:
9.4mph - 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:
7.6mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.8mph - Average wind speed in September:
6.3mph - Average wind speed in October:
8.1mph - Average wind speed in November:
8.6mph - Average wind speed in December:
8.8mph
The windiest months (with the highest average wind speed) are January and February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity
Carterville, IL
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Carterville, IL
- Average rainfall in January:
1.42" - Average rainfall in February:
1.65" - Average rainfall in March:
2.09" - Average rainfall in April:
3.11" - Average rainfall in May:
2.52" - Average rainfall in June:
2.13"
- Average rainfall in July:
2.09" - Average rainfall in August:
1.89" - Average rainfall in September:
1.1" - Average rainfall in October:
1.89" - Average rainfall in November:
1.69" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (1.1").
Average rainfall days
Carterville, IL
- Average rainfall days in January:
8.8 days - Average rainfall days in February:
9.1 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
15.1 days - Average rainfall days in June:
13.3 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
13.5 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
7.8 days - Average rainfall days in December:
9.1 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (7.8 days).
Average snowfall
Carterville, IL
The months with the highest snowfall are January and February (0.94").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Carterville, IL
- Average snowfall days in January:
4.1 days - Average snowfall days in February:
4.3 days - Average snowfall days in March:
1.8 days - Average snowfall days in April:
0.5 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:
0.2 days - Average snowfall days in November:
0.9 days - Average snowfall days in December:
2.7 days
The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Carterville, 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 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 3min - 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 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 3min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days
Carterville, IL
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.9 days - Average sunshine days in April:
13.7 days - Average sunshine days in May:
13.3 days - Average sunshine days in June:
13.3 days
- Average sunshine days in July:
12.9 days - Average sunshine days in August:
14.9 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
20.6 days - Average sunshine days in November:
19.9 days - Average sunshine days in December:
18.6 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (12.9 days).
Average UV index
Carterville, 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 and December (UV index 2).
Average cloud cover
Carterville, IL
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are June, August and September (Cloud cover 28).
Average visibility
Carterville, 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).
Carterville, Illinois, USA
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