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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 Caseyville, Illinois, with an average temperature fluctuating between 24.3°F (-4.3°C) and 37.4°F (3°C). Caseyville notes the coldest temperatures in January, with a high average of 37.4°F (3°C) and a low of 24.3°F (-4.3°C). Weather in January »
Weather in February
The last month of the winter, February, is also a wintry month in Caseyville, Illinois, with temperature in the range of an average high of 42.1°F (5.6°C) and an average low of 27.5°F (-2.5°C). With the advent of February, Caseyville's high-temperatures adjust to a still cold 42.1°F (5.6°C), closely aligning with the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Caseyville, is a fresh month, with an average temperature varying between 54.1°F (12.3°C) and 37.8°F (3.2°C). With the onset of March, Caseyville's average high-temperature experiences a rise, moving from February's wintry 42.1°F (5.6°C) to a fresh 54.1°F (12.3°C). Weather in March »
Weather in April
April in Caseyville, Illinois, is an enjoyable spring month, with an average temperature fluctuating between 64.9°F (18.3°C) and 47.8°F (8.8°C). With the arrival of April, the average high-temperature transitions from a fresh 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 Caseyville, Illinois, with an average temperature varying between 74.5°F (23.6°C) and 57.6°F (14.2°C). The start of May is characterized by an increase in the average high-temperature, transitioning 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
June, the first month of the summer in Caseyville, is also a moderately hot month, with an average temperature ranging between max 83.3°F (28.5°C) and min 66.6°F (19.2°C). The coming of June brings a minor shift in Caseyville's weather, with average high-temperatures adjusting from May's moderately hot 74.5°F (23.6°C) to a still warm 83.3°F (28.5°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Caseyville, Illinois, with an average temperature ranging between max 85.6°F (29.8°C) and min 68.2°F (20.1°C). Caseyville's July weather, with an average high temperature of 85.6°F (29.8°C) and an average low temperature of 68.2°F (20.1°C), tends to be the warmest of the year. The heat index value for July is calculated to be a very hot 98.6°F (37°C). Weather in July »
Weather in August
August, the last month of the summer in Caseyville, is another warm month, with temperature in the range of an average low of 66°F (18.9°C) and an average high of 84°F (28.9°C). The arrival of August sees a recorded average high-temperature of a still warm 84°F (28.9°C), showing little divergence from the previous month's conditions. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Caseyville, Illinois, with an average temperature fluctuating between 79°F (26.1°C) and 59.9°F (15.5°C). With the arrival of September, Caseyville's average high-temperature registers at a still warm 79°F (26.1°C), indicating a subtle variation from the previous month. Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Caseyville, Illinois, with an average temperature ranging between max 66°F (18.9°C) and min 48.9°F (9.4°C). Start of October brings a shift in the average high-temperature, falling from September's warm 79°F (26.1°C) to an enjoyable 66°F (18.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Caseyville, Illinois, with an average temperature ranging between min 37.6°F (3.1°C) and max 52.9°F (11.6°C). In Caseyville, the beginning of November is marked by a lowered average high-temperature, shifting from October's refreshing 66°F (18.9°C) to a fresh 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 Caseyville, Illinois, with an average temperature fluctuating between 30°F (-1.1°C) and 41.9°F (5.5°C). In December, the average high-temperature decreases from a cool 52.9°F (11.6°C) in November to a cold 41.9°F (5.5°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest month in Caseyville?
During the coldest month in Caseyville, January, temperatures average a high of 37.4°F (3°C) and a low of 24.3°F (-4.3°C).
How many days does it rain in Caseyville?
Throughout the year, there are 149.9 rainfall days, and 33.94" (862mm) of precipitation is accumulated.
When does it snow in Caseyville?
January through March, September, November and December are months with snowfall.
When does it snow the most in Caseyville?
The month with the most snowfall is January, when snow falls for 7 days and typically aggregates up to 2.13" (54mm) of snow.
How much does it snow in Caseyville?
Throughout the year, there are 20.7 snowfall days, and 7.13" (181mm) of snow is accumulated.
What is the month with the least sunshine in Caseyville?
January has the least sunshine of the year, with an average of 4.5h of sunshine.
What are the months with the lowest UV index in Caseyville?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Caseyville, Illinois.
What is the driest month in Caseyville?
The month with the least rainfall in Caseyville, Illinois, 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 Caseyville?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Caseyville, Illinois, 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 Caseyville?
April through August and October are months without snowfall.
What is the most humid month in Caseyville?
The months with the highest humidity are May, July and August, with an average relative humidity of 79%.
What is the rainiest month in Caseyville?
May is the month with the most rainfall. Rain falls for 17.1 days and accumulates 4.17" (106mm) of precipitation.
What is the month with the highest UV index in Caseyville?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days in Caseyville?
June has the longest days of the year in Caseyville, Illinois, with an average of 14h and 48min of daylight.
What month has the most sunshine in Caseyville?
The month with the most sunshine in Caseyville is June, with an average of 10.5h of sunshine.
What month is the hottest in Caseyville?
July, recording an average high temperature of 85.6°F (29.8°C) and a low temperature of 68.2°F (20.1°C), is Caseyville's warmest month.
What is the least humid month in Caseyville?
October is the least humid month, with an average relative humidity of 71%.
What is the month with the shortest days in Caseyville?
The month with the shortest days in Caseyville, Illinois, is December, with an average of 9h and 30min of daylight.
Average temperature
Caseyville, 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
Caseyville, 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
Caseyville, 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
Caseyville, 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
Caseyville, 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
Caseyville, 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
Caseyville, 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
Caseyville, 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
Caseyville, 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
Caseyville, 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
Caseyville, 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
Caseyville, 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
Caseyville, 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).
Caseyville, Illinois, USA
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