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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, is a freezing cold winter month in Atlanta, Illinois, with temperature in the range of an average low of 19.8°F (-6.8°C) and an average high of 31.6°F (-0.2°C). January, with its high-temperature average of 31.6°F (-0.2°C) and a low-temperature average of 19.8°F (-6.8°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Atlanta, Illinois, with an average temperature varying between 23.5°F (-4.7°C) and 36.7°F (2.6°C). The shift into February reveals an average high-temperature of an icy 36.7°F (2.6°C), closely mirroring January's climate. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Atlanta, Illinois, with an average temperature varying between 34.7°F (1.5°C) and 49.5°F (9.7°C). March sees a temperature increase, moving from an icy 36.7°F (2.6°C) in February to a frosty 49.5°F (9.7°C). Weather in March »
Weather in April
April is an enjoyable spring month in Atlanta, Illinois, with an average temperature fluctuating between 45.1°F (7.3°C) and 61.3°F (16.3°C). The transition to April introduces an increase in the average high-temperature, shifting from a chilly 49.5°F (9.7°C) in March to an enjoyable 61.3°F (16.3°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Atlanta, Illinois, with temperature in the range of an average low of 55.8°F (13.2°C) and an average high of 72.1°F (22.3°C). The commencement of May sees a shift in the average high-temperature, moving from an enjoyable 61.3°F (16.3°C) in April to an agreeable 72.1°F (22.3°C). Weather in May »
Weather in June
June, the first month of the summer in Atlanta, is a warm month, with an average temperature ranging between min 63.9°F (17.7°C) and max 80.1°F (26.7°C). June's onset witnesses a minor shift in the average high-temperature, moving from a pleasant 72.1°F (22.3°C) in May to a moderately hot 80.1°F (26.7°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Atlanta, Illinois, with an average temperature fluctuating between 81.5°F (27.5°C) and 65.1°F (18.4°C). July stands out as Atlanta's warmest month, with temperatures ranging between an average high of 81.5°F (27.5°C) and a low of 65.1°F (18.4°C). July's mean 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 Atlanta, is also a moderately hot month, with temperature in the range of an average low of 63.5°F (17.5°C) and an average high of 81.1°F (27.3°C). August's onset records a minor alteration in the average high-temperature to a still moderately hot 81.1°F (27.3°C) from July's 81.5°F (27.5°C). Weather in August »
Weather in September
September, the first month of the autumn in Atlanta, is also a moderately hot month, with an average temperature varying between 76.1°F (24.5°C) and 58.3°F (14.6°C). At the onset of September, Atlanta records an average high-temperature of a still warm 76.1°F (24.5°C), showing little deviation from the preceding month. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Atlanta, Illinois, with an average temperature varying between 46.9°F (8.3°C) and 63.3°F (17.4°C). October ushers in a slight temperature change, with average high-temperatures reducing from September's moderately hot 76.1°F (24.5°C) to a refreshing 63.3°F (17.4°C). Weather in October »
Weather in November
November, the last month of the autumn in Atlanta, is another chilly month, with temperature in the range of an average low of 35.4°F (1.9°C) and an average high of 49.1°F (9.5°C). November's arrival correlates with a reduction in the average high-temperature, down from an enjoyable 63.3°F (17.4°C) in October to a frosty 49.1°F (9.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Atlanta, Illinois, with an average temperature fluctuating between 27°F (-2.8°C) and 37.4°F (3°C). The transition into December is accompanied by a temperature decrease, with the average high-temperature shifting from a chilly 49.1°F (9.5°C) in November to a cold 37.4°F (3°C). Weather in December »
Updated: Aug 17, 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?
Temperature records mark January as the coldest month, with highs averaging 31.6°F (-0.2°C) and lows at 19.8°F (-6.8°C).
How much does it rain?
Throughout the year, there are 135 rainfall days, and 17.72" (450mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, November and December.
When does it snow the most in Atlanta?
January is the month with the most snowfall. Snow falls for 9.5 days and accumulates 2.2" (56mm) of snow.
How many days does it snow?
In Atlanta, during the entire year, snow falls for 27.1 days and aggregates up to 7.2" (183mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4h of sunshine.
When is the lowest UV index?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
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 May, when the rain falls for 16.5 days and typically aggregates up to 2.2" (56mm) of precipitation.
When it does not snow?
May through October are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 0min of daylight.
What month has the most sunshine?
June has the most sunshine of the year in Atlanta, with an average of 10.3h of sunshine.
What is the month with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What is the warmest month?
Atlanta's warmest month, July, generally records average temperatures ranging from a high of 81.5°F (27.5°C) to a low of 65.1°F (18.4°C).
What is the most humid month?
July is the most humid month, with an average relative humidity of 85%.
What is the least humid month?
October is the least humid month, with an average relative humidity of 70%.
What is the driest month?
December is the month with the least rainfall. Rain falls for 7.2 days and accumulates 0.87" (22mm) of precipitation.
What is the month with the shortest days?
With an average of 9h and 24min of daylight, December has the shortest days of the year.
Average temperature
Atlanta, IL
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (31.6°F).
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure
Atlanta, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"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:
30.11"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
Atlanta, IL
- Average wind speed in January:
10.5mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9.3mph - Average wind speed in November:
10mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity
Atlanta, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Atlanta, IL
- Average rainfall in January:
0.98" - Average rainfall in February:
0.98" - Average rainfall in March:
1.38" - Average rainfall in April:
1.93" - Average rainfall in May:
2.2" - Average rainfall in June:
2.17"
- Average rainfall in July:
1.69" - Average rainfall in August:
1.65" - Average rainfall in September:
1.46" - Average rainfall in October:
1.34" - Average rainfall in November:
1.06" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is December (0.87").
Average rainfall days
Atlanta, IL
- Average rainfall days in January:
6.6 days - Average rainfall days in February:
5.9 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
14 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
13.3 days - Average rainfall days in September:
11.4 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
7.9 days - Average rainfall days in December:
7.2 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (5.9 days).
Average snowfall
Atlanta, IL
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Atlanta, IL
- Average snowfall days in January:
9.5 days - Average snowfall days in February:
6.2 days - Average snowfall days in March:
3 days - Average snowfall days in April:
0.8 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:
2.1 days - Average snowfall days in December:
5.3 days
The month with the highest number of snowfall days is January (9.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Atlanta, 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:
4h and 0min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 1min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Atlanta, IL
- Average sunshine days in January:
18.8 days - Average sunshine days in February:
16.8 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
14 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
20 days - Average sunshine days in December:
20 days
The months with the most sunshine days are November and December (20 days).
The month with the least sunshine days is May (11.6 days).
Average UV index
Atlanta, 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
Atlanta, IL
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility
Atlanta, 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).
Atlanta, Illinois, USA
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