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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 Holland, Illinois, is a freezing cold winter month, with temperature in the range of an average low of 19.6°F (-6.9°C) and an average high of 29.8°F (-1.2°C). January, on average, is the coldest month, registering a high temperature of 29.8°F (-1.2°C) and a low of 19.6°F (-6.9°C). Weather in January »
Weather in February
The last month of the winter, February, is an icy month in South Holland, Illinois, with an average temperature varying between 22.5°F (-5.3°C) and 32.9°F (0.5°C). The onset of February manifests an average high-temperature of a wintry 32.9°F (0.5°C), demonstrating a minor variation from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in South Holland, is a frosty month, with an average temperature varying between 32.5°F (0.3°C) and 44.2°F (6.8°C). In South Holland, the average high-temperature in March rises, from an icy 32.9°F (0.5°C) in February, to a chilly 44.2°F (6.8°C). Weather in March »
Weather in April
April in South Holland, Illinois, is a fresh spring month, with temperature in the range of an average low of 41.4°F (5.2°C) and an average high of 54.9°F (12.7°C). With the onset of April, South Holland's weather sees a temperature rise, transitioning from a chilly 44.2°F (6.8°C) in March to a cool 54.9°F (12.7°C). Weather in April »
Weather in May
The last month of the spring, May, is a comfortable month in South Holland, Illinois, with an average temperature ranging between max 65.7°F (18.7°C) and min 51.8°F (11°C). May's arrival coincides with a temperature rise, moving from April's fresh 54.9°F (12.7°C) to a refreshing 65.7°F (18.7°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in South Holland, Illinois, with an average temperature ranging between max 75.7°F (24.3°C) and min 61.2°F (16.2°C). South Holland's transition into June is marked by a rise in the average high-temperature, advancing from an enjoyable 65.7°F (18.7°C) in May to a moderately hot 75.7°F (24.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in South Holland, Illinois, with temperature in the range of an average low of 66.9°F (19.4°C) and an average high of 80.1°F (26.7°C). During the warmest month, July, temperatures average a high of 80.1°F (26.7°C) and a low of 66.9°F (19.4°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in South Holland, Illinois, with an average temperature ranging between max 79.3°F (26.3°C) and min 66°F (18.9°C). South Holland starts August with an average high-temperature of a still warm 79.3°F (26.3°C), hinting at a minimal fluctuation from July. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in South Holland, Illinois, with an average temperature varying between 73.8°F (23.2°C) and 59.2°F (15.1°C). September signifies a gentle decline in South Holland's average high-temperature, easing from 79.3°F (26.3°C) in August to a still warm 73.8°F (23.2°C). Weather in September »
Weather in October
October, the same as September, in South Holland, Illinois, is another refreshing autumn month, with an average temperature fluctuating between 60.3°F (15.7°C) and 47.7°F (8.7°C). The average high-temperature drops in October, from September's warm 73.8°F (23.2°C) to a refreshing 60.3°F (15.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in South Holland, Illinois, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 46.8°F (8.2°C). The onset of November comes with a shift in the average high-temperature, falling from a refreshing 60.3°F (15.7°C) in October to a frosty 46.8°F (8.2°C). Weather in November »
Weather in December
December, the first month of the winter in South Holland, is also an icy month, with an average temperature varying between 26.8°F (-2.9°C) and 35.8°F (2.1°C). The onset of December is marked by a decrease in temperature, transitioning from a frosty 46.8°F (8.2°C) in November to a wintry 35.8°F (2.1°C). Weather in December »
Updated: Aug 3, 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 month is the coldest?
January, with average temperatures reaching a high of 29.8°F (-1.2°C) and a low of 19.6°F (-6.9°C), is the coldest month.
What are the most humid months?
The months with the highest humidity are January and February, with an average relative humidity of 82%.
How many days does it rain?
Throughout the year, there are 110.3 rainfall days, and 10.31" (262mm) of precipitation is accumulated.
When does it snow in South Holland?
January through April, October through December are months with snowfall.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 9.3 days and accumulates 1.1" (28mm) of snow.
How much does it snow?
Throughout the year, there are 34.1 snowfall days, and 4.13" (105mm) of snow is accumulated.
What is the month with the least sunshine in South Holland?
January has the least sunshine of the year, with an average of 3.6h of sunshine.
What is the driest month?
February and December are months with the least rain when the rain falls for 4.1 days and typically aggregates up to 0.47" (12mm) of rain.
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 wettest months in South Holland are May and June, with an average 1.38" (35mm) of rainfall.
When it does not snow?
In South Holland, snow does not fall in May through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 6min of daylight.
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?
July is the warmest month of the year, registering average temperatures as high as 80.1°F (26.7°C) and as low as 66.9°F (19.4°C).
What month has the most sunshine?
The month with the most sunshine is August, with an average of 10.4h of sunshine.
What is the least humid month?
With an average relative humidity of 72%, October is the least humid month.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
When is the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
South Holland, IL
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (29.8°F).
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure
South Holland, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.97"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:
30.01"Hg - Average pressure in November:
30.1"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 Holland, IL
- Average wind speed in January:
11mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.8mph - Average wind speed in September:
8mph - Average wind speed in October:
9.8mph - Average wind speed in November:
10.6mph - Average wind speed in December:
10.3mph
The windiest month (with the highest average wind speed) is January (11mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity
South Holland, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
South Holland, IL
- Average rainfall in January:
0.51" - Average rainfall in February:
0.47" - Average rainfall in March:
0.51" - Average rainfall in April:
1.1" - Average rainfall in May:
1.38" - Average rainfall in June:
1.38"
- Average rainfall in July:
1.18" - Average rainfall in August:
0.98" - Average rainfall in September:
0.91" - Average rainfall in October:
0.87" - Average rainfall in November:
0.55" - Average rainfall in December:
0.47"
The wettest months (with the highest rainfall) are May and June (1.38").
The driest months (with the least rainfall) are February and December (0.47").
Average rainfall days
South Holland, IL
- Average rainfall days in January:
4.6 days - Average rainfall days in February:
4.1 days - Average rainfall days in March:
8.7 days - Average rainfall days in April:
11.7 days - Average rainfall days in May:
13.1 days - Average rainfall days in June:
12.9 days
- Average rainfall days in July:
14 days - Average rainfall days in August:
11 days - Average rainfall days in September:
9.8 days - Average rainfall days in October:
9 days - Average rainfall days in November:
7.2 days - Average rainfall days in December:
4.2 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is February (4.1 days).
Average snowfall
South Holland, IL
The month with the highest snowfall is January (1.1").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
South Holland, IL
- Average snowfall days in January:
9.3 days - Average snowfall days in February:
8.5 days - Average snowfall days in March:
4.2 days - Average snowfall days in April:
1.4 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:
0.3 days - Average snowfall days in November:
2.9 days - Average snowfall days in December:
7.5 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
South Holland, 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 3min - 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 6min).
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:
6h and 0min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 0min - Average sunshine in December:
4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
South Holland, IL
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
17.1 days - Average sunshine days in March:
18.8 days - Average sunshine days in April:
15.2 days - Average sunshine days in May:
14.3 days - Average sunshine days in June:
13.1 days
- Average sunshine days in July:
13.4 days - Average sunshine days in August:
15.6 days - Average sunshine days in September:
16.9 days - Average sunshine days in October:
18.1 days - Average sunshine days in November:
19.7 days - Average sunshine days in December:
19.8 days
The month with the most sunshine days is December (19.8 days).
The month with the least sunshine days is June (13.1 days).
Average UV index
South Holland, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
South Holland, IL
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
South Holland, 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).
South Holland, Illinois, USA
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