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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 Allerton, Illinois, with an average temperature varying between 33.3°F (0.7°C) and 21°F (-6.1°C). With its high average temperature of 33.3°F (0.7°C) and a low of 21°F (-6.1°C), January is regarded as the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is also an icy month in Allerton, Illinois, with an average temperature fluctuating between 37.9°F (3.3°C) and 25°F (-3.9°C). The transition into February is marked with an average high-temperature of a still icy 37.9°F (3.3°C), showing an insignificant shift from January's 33.3°F (0.7°C). Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Allerton, Illinois, with an average temperature fluctuating between 50.2°F (10.1°C) and 35.4°F (1.9°C). Allerton, Illinois, in March shows a temperature shift, moving from an average high of an icy 37.9°F (3.3°C) in February to a cool 50.2°F (10.1°C). Weather in March »
Weather in April
April is a refreshing spring month in Allerton, Illinois, with an average temperature ranging between max 61.9°F (16.6°C) and min 46°F (7.8°C). As April sets, the average high-temperature shows an increase, moving up from a cool 50.2°F (10.1°C) in March to an enjoyable 61.9°F (16.6°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Allerton, Illinois, with an average temperature varying between 56.5°F (13.6°C) and 72.7°F (22.6°C). May's arrival is marked by an increase in the average high-temperature, moving from an enjoyable 61.9°F (16.6°C) in April to an agreeable 72.7°F (22.6°C). Weather in May »
Weather in June
June, the first month of the summer in Allerton, is a warm month, with temperature in the range of an average high of 80.8°F (27.1°C) and an average low of 64°F (17.8°C). A minor escalation in the average high-temperature is seen with the onset of June, moving from a pleasant 72.7°F (22.6°C) in May to a moderately hot 80.8°F (27.1°C). Weather in June »
Weather in July
July, like June, in Allerton, Illinois, is another warm summer month, with an average temperature fluctuating between 65.7°F (18.7°C) and 82°F (27.8°C). With average high and low temperatures of 82°F (27.8°C) and 65.7°F (18.7°C) respectively, July is Allerton's warmest month. For most parts of July, the heat index is calculated to be a tropical 89.6°F (32°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Allerton, Illinois, with temperature in the range of an average high of 81°F (27.2°C) and an average low of 63.7°F (17.6°C). With the transition into August, Allerton notes an average high-temperature of a still moderately hot 81°F (27.2°C), closely resembling July. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Allerton, Illinois, with an average temperature fluctuating between 58.5°F (14.7°C) and 77°F (25°C). The onset of September manifests an average high-temperature of a still warm 77°F (25°C), demonstrating a minor variation from the preceding month. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Allerton, Illinois, with temperature in the range of an average low of 48°F (8.9°C) and an average high of 63.9°F (17.7°C). The move into October indicates a reduction in the average high-temperature, down from September's warm 77°F (25°C) to a refreshing 63.9°F (17.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Allerton, Illinois, with an average temperature varying between 49.6°F (9.8°C) and 36.1°F (2.3°C). The beginning of November marks a decrease in the average high-temperature, transitioning from an enjoyable 63.9°F (17.7°C) in October to a chilly 49.6°F (9.8°C). Weather in November »
Weather in December
December, the first month of the winter in Allerton, is still a cold month, with temperature in the range of an average low of 28°F (-2.2°C) and an average high of 38.5°F (3.6°C). Allerton's weather in December involves a decrease in the average high-temperature, moving down from November's frosty 49.6°F (9.8°C) to an icy 38.5°F (3.6°C). Weather in December »
Updated: Jun 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?
In Allerton, January is the month with the lowest recorded average temperatures, measuring a high of 33.3°F (0.7°C) and a low of 21°F (-6.1°C).
How much does it rain?
In Allerton, during the entire year, the rain falls for 132 days and collects up to 15.94" (405mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
How many days does it snow?
Throughout the year, there are 25.6 snowfall days, and 4.41" (112mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 4.1h of sunshine, January has the least sunshine of the year.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the driest month?
February is the month with the least rainfall. Rain falls for 6 days and accumulates 0.83" (21mm) of precipitation.
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?
April is the month with the most rainfall. Rain falls for 14.1 days and accumulates 1.97" (50mm) of precipitation.
When it does not snow?
In Allerton, snow does not fall in May through September.
When are the longest days?
The month with the longest days is June, with an average of 15h and 0min of daylight.
What month has the most sunshine?
With an average of 10.3h of sunshine, June has the most sunshine of the year.
What are the months with the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What part of the year is the hottest?
Temperature records mark July as the warmest month, with highs averaging 82°F (27.8°C) and lows at 65.7°F (18.7°C).
What is the most humid month?
July is the most humid month, with an average relative humidity of 84%.
What is the least humid month?
October is the least humid month, with an average relative humidity of 70%.
What is the snowiest month?
December is the month with the most snowfall. Snow falls for 5.7 days and accumulates 1.26" (32mm) of snow.
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
Allerton, IL
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.3°F).
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure
Allerton, IL
- Average pressure in January:
30.15"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:
29.93"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:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Allerton, IL
- Average wind speed in January:
10.8mph - Average wind speed in February:
10.7mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.5mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.2mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.1mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity
Allerton, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Allerton, IL
- Average rainfall in January:
1.06" - Average rainfall in February:
0.83" - Average rainfall in March:
1.38" - Average rainfall in April:
1.97" - Average rainfall in May:
1.89" - Average rainfall in June:
1.65"
- Average rainfall in July:
1.61" - Average rainfall in August:
1.46" - Average rainfall in September:
0.87" - Average rainfall in October:
1.3" - Average rainfall in November:
0.94" - Average rainfall in December:
0.98"
The wettest month (with the highest rainfall) is April (1.97").
The driest month (with the least rainfall) is February (0.83").
Average rainfall days
Allerton, IL
- Average rainfall days in January:
6.9 days - Average rainfall days in February:
6 days - Average rainfall days in March:
11.5 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
15.6 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
15.7 days - Average rainfall days in August:
13 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
9.9 days - Average rainfall days in November:
7.7 days - Average rainfall days in December:
7.7 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is February (6 days).
Average snowfall
Allerton, IL
The month with the highest snowfall is December (1.26").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Allerton, IL
- Average snowfall days in January:
8 days - Average snowfall days in February:
7.2 days - Average snowfall days in March:
2.5 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:
1.5 days - Average snowfall days in December:
5.7 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Allerton, 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 1min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
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 6min).
Average sunshine days
Allerton, IL
- Average sunshine days in January:
18.5 days - Average sunshine days in February:
15.9 days - Average sunshine days in March:
15.6 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
12.2 days - Average sunshine days in June:
11.5 days
- Average sunshine days in July:
11.1 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
17.3 days - Average sunshine days in October:
18.3 days - Average sunshine days in November:
19.8 days - Average sunshine days in December:
18.1 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is July (11.1 days).
Average UV index
Allerton, 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
Allerton, IL
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility
Allerton, 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).
Allerton, Illinois, USA
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