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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, in South Barrington, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 16.5°F (-8.6°C) and 27.9°F (-2.3°C). January, having an average high-temperature of 27.9°F (-2.3°C) and an average low-temperature of 16.5°F (-8.6°C), is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in South Barrington, is another freezing cold month, with an average temperature fluctuating between 19.4°F (-7°C) and 31.5°F (-0.3°C). South Barrington indicates an average high-temperature of a still subzero cold 31.5°F (-0.3°C) in February, showing minor variation from January's 27.9°F (-2.3°C). Weather in February »
Weather in March
March, the first month of the spring in South Barrington, is a chilly month, with temperature in the range of an average high of 44.1°F (6.7°C) and an average low of 30.7°F (-0.7°C). As March begins, there is an increase in the average high-temperature, moving from a subzero cold 31.5°F (-0.3°C) in February to a frosty 44.1°F (6.7°C). Weather in March »
Weather in April
April in South Barrington, Illinois, is a mild spring month, with temperature in the range of an average high of 55.6°F (13.1°C) and an average low of 39.9°F (4.4°C). April brings a temperature increase, with average high-temperatures moving from March's chilly 44.1°F (6.7°C) to a moderate 55.6°F (13.1°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in South Barrington, Illinois, with an average temperature fluctuating between 51.3°F (10.7°C) and 67.5°F (19.7°C). Noticing a change, the average high-temperature during May moves from April's moderate 55.6°F (13.1°C) to a comfortable 67.5°F (19.7°C). Weather in May »
Weather in June
June, the first month of the summer in South Barrington, is a moderately hot month, with temperature in the range of an average high of 76.8°F (24.9°C) and an average low of 60.4°F (15.8°C). The commencement of June sees a shift in the average high-temperature, moving from an enjoyable 67.5°F (19.7°C) in May to a warm 76.8°F (24.9°C). Weather in June »
Weather in July
July, like June, in South Barrington, Illinois, is another warm summer month, with temperature in the range of an average low of 65.7°F (18.7°C) and an average high of 81.7°F (27.6°C). During the warmest month, July, temperatures average a high of 81.7°F (27.6°C) and a low of 65.7°F (18.7°C). July's average heat index is appraised at a tropical 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in South Barrington, Illinois, with an average temperature varying between 80.1°F (26.7°C) and 64.2°F (17.9°C). At the onset of August, South Barrington records an average high-temperature of a still moderately hot 80.1°F (26.7°C), showing little deviation from the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in South Barrington, Illinois, with an average temperature ranging between min 57.6°F (14.2°C) and max 73.4°F (23°C). The start of September comes with a small reduction in the average high-temperature, subtly receding from a warm 80.1°F (26.7°C) in August to a still moderately hot 73.4°F (23°C). Weather in September »
Weather in October
October, the same as September, in South Barrington, Illinois, is a moderate autumn month, with an average temperature ranging between max 60.1°F (15.6°C) and min 45.5°F (7.5°C). The average high-temperature decreases in October, shifting from a moderately hot 73.4°F (23°C) in September to a mild 60.1°F (15.6°C). Weather in October »
Weather in November
November, the last month of the autumn in South Barrington, is also a frosty month, with temperature in the range of an average high of 45.5°F (7.5°C) and an average low of 33.1°F (0.6°C). The start of November signals a clear decrease in the average high-temperature, falling from a refreshing 60.1°F (15.6°C) in October to a frosty 45.5°F (7.5°C). Weather in November »
Weather in December
December, the first month of the winter in South Barrington, is also a wintry month, with an average temperature fluctuating between 34°F (1.1°C) and 23.9°F (-4.5°C). The start of December signals a decrease in the average high-temperature, transitioning from a chilly 45.5°F (7.5°C) in November to an icy 34°F (1.1°C). Weather in December »
Updated: Jul 26, 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?
January is the month that records the lowest temperatures, with averages ranging from a high of 27.9°F (-2.3°C) to a low of 16.5°F (-8.6°C).
What is the most humid month?
January and February, with an average relative humidity of 83%, are most humid months.
How much does it rain?
Throughout the year, in South Barrington, Illinois, there are 145.9 rainfall days, and 24.72" (628mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, October through December.
How much does it snow?
In South Barrington, Illinois, during the entire year, snow falls for 47.6 days and aggregates up to 15.83" (402mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.6h of sunshine.
What are the months with the lowest UV index in South Barrington?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 11 days and typically aggregates up to 4.21" (107mm) of snow.
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 rainiest month in South Barrington?
The month with the most rainfall is May, when the rain falls for 17.5 days and typically aggregates up to 3.07" (78mm) of precipitation.
When it does not snow?
In South Barrington, Illinois, snow does not fall in June through September.
When are the longest days?
The month with the longest days is June, with an average of 15h and 12min of daylight.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What month is the hottest?
South Barrington notes the warmest temperatures in July, with a average high of 81.7°F (27.6°C) and a low of 65.7°F (18.7°C).
What month has the most sunshine?
The month with the most sunshine is July, with an average of 9.9h of sunshine.
What is the least humid month?
October is the least humid month in South Barrington, with an average relative humidity of 73%.
What is the driest month?
December is the month with the least rainfall. Rain falls for 7.8 days and accumulates 1.14" (29mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
South Barrington, IL
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (27.9°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 (16.5°F).
Average pressure
South Barrington, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"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:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
South Barrington, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.6mph - Average wind speed in May:
8.2mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.2mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.1mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
South Barrington, IL
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall
South Barrington, IL
- Average rainfall in January:
1.38" - Average rainfall in February:
1.46" - Average rainfall in March:
1.46" - Average rainfall in April:
2.87" - Average rainfall in May:
3.07" - Average rainfall in June:
2.83"
- Average rainfall in July:
2.72" - Average rainfall in August:
2.72" - Average rainfall in September:
1.69" - Average rainfall in October:
2.13" - Average rainfall in November:
1.26" - Average rainfall in December:
1.14"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (1.14").
Average rainfall days
South Barrington, IL
- Average rainfall days in January:
6 days - Average rainfall days in February:
4.8 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
17.7 days - Average rainfall days in August:
16.2 days - Average rainfall days in September:
12.8 days - Average rainfall days in October:
12.6 days - Average rainfall days in November:
8.1 days - Average rainfall days in December:
7.8 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (4.8 days).
Average snowfall
South Barrington, IL
The month with the highest snowfall is February (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
South Barrington, IL
- Average snowfall days in January:
12.7 days - Average snowfall days in February:
11 days - Average snowfall days in March:
6.7 days - Average snowfall days in April:
2.1 days - Average snowfall days in May:
0.1 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:
0.5 days - Average snowfall days in November:
3.8 days - Average snowfall days in December:
10.7 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
South Barrington, IL
- Average daylight in January:
9h and 3min - 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 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 2min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 0min - Average sunshine in December:
4h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
South Barrington, IL
- Average sunshine days in January:
14.1 days - Average sunshine days in February:
11.9 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
11 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
11.5 days
- Average sunshine days in July:
10.4 days - Average sunshine days in August:
11.1 days - Average sunshine days in September:
13.9 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
17.4 days - Average sunshine days in December:
15.1 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (10.4 days).
Average UV index
South Barrington, 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 and December (UV index 1).
Average cloud cover
South Barrington, IL
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July, August and September (Cloud cover 32).
Average visibility
South Barrington, IL
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
South Barrington, Illinois, USA
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