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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 Hillside, Illinois, is another subzero cold winter month, with temperature in the range of an average high of 28.8°F (-1.8°C) and an average low of 18°F (-7.8°C). January, on average, is the coldest month, registering a high temperature of 28.8°F (-1.8°C) and a low of 18°F (-7.8°C). Weather in January »
Weather in February
February, the last month of the winter in Hillside, is an icy month, with an average temperature ranging between max 32.4°F (0.2°C) and min 20.7°F (-6.3°C). During February, Hillside observes a subtle ascent to a wintry 32.4°F (0.2°C) from January's 28.8°F (-1.8°C) in the average high-temperature. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Hillside, Illinois, with an average temperature fluctuating between 31.5°F (-0.3°C) and 44.2°F (6.8°C). Hillside's weather shows a temperature rise with the arrival of March, moving from a wintry 32.4°F (0.2°C) in February to a frosty 44.2°F (6.8°C). Weather in March »
Weather in April
April is a cool spring month in Hillside, Illinois, with temperature in the range of an average high of 55.2°F (12.9°C) and an average low of 40.6°F (4.8°C). April brings an increase in the average high-temperature, progressing from a frosty 44.2°F (6.8°C) in March to a cool 55.2°F (12.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a comfortable month in Hillside, Illinois, with an average temperature varying between 51.6°F (10.9°C) and 67.3°F (19.6°C). As April transitions into May, a change in temperatures is observed, with average highs moving from a cool 55.2°F (12.9°C) to a refreshing 67.3°F (19.6°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Hillside, Illinois, with an average temperature fluctuating between 76.8°F (24.9°C) and 61.2°F (16.2°C). The shift into June brings an increase in the average high-temperature, moving from a comfortable 67.3°F (19.6°C) in May to a warm 76.8°F (24.9°C). Weather in June »
Weather in July
July, like June, in Hillside, Illinois, is another warm summer month, with an average temperature ranging between min 66.6°F (19.2°C) and max 81.9°F (27.7°C). July is the month when Hillside experiences its warmest temperatures, averaging a high of 81.9°F (27.7°C) and a low of 66.6°F (19.2°C). In July, the average heat index is computed to be a tropical 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Hillside, is also a moderately hot month, with an average temperature fluctuating between 80.2°F (26.8°C) and 65.7°F (18.7°C). August ushers in an average high-temperature of a still moderately hot 80.2°F (26.8°C), aligning closely with the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Hillside, is also a moderately hot month, with an average temperature fluctuating between 58.6°F (14.8°C) and 73.4°F (23°C). September brings a slight decrease in the average high-temperature, shifting from 80.2°F (26.8°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 Hillside, Illinois, is a moderate autumn month, with an average temperature varying between 60.4°F (15.8°C) and 46.6°F (8.1°C). During Hillside's transition into October, the average high-temperature lessens, moving from a moderately hot 73.4°F (23°C) in September to a refreshing 60.4°F (15.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Hillside, is another chilly month, with temperature in the range of an average low of 33.6°F (0.9°C) and an average high of 45.9°F (7.7°C). The start of November signals a considerable reduction in the average high-temperature, receding from a moderate 60.4°F (15.8°C) in October to a chilly 45.9°F (7.7°C). Weather in November »
Weather in December
December, the first month of the winter in Hillside, is also a wintry month, with temperature in the range of an average high of 34.7°F (1.5°C) and an average low of 25.2°F (-3.8°C). A change in temperatures is noted as November gives way to December, with average highs reducing from a frosty 45.9°F (7.7°C) to a wintry 34.7°F (1.5°C). Weather in December »
Updated: Feb 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 month is the coldest in Hillside?
In Hillside, January is the coldest month, with temperatures averaging a high of 28.8°F (-1.8°C) and a low of 18°F (-7.8°C).
What are the most humid months in Hillside?
January and February, with an average relative humidity of 82%, are most humid months in Hillside, Illinois.
How many days does it rain in Hillside?
In Hillside, Illinois, during the entire year, the rain falls for 149.4 days and collects up to 25.08" (637mm) of precipitation.
When does it snow in Hillside?
January through May, October through December are months with snowfall.
How much does it snow in Hillside?
In Hillside, Illinois, during the entire year, snow falls for 45.8 days and aggregates up to 14.25" (362mm) of snow.
What is the month with the least sunshine in Hillside?
January has the least sunshine of the year, with an average of 3.7h of sunshine.
What is the month with the lowest UV index in Hillside?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the snowiest month in Hillside?
The month with the most snowfall is February, when snow falls for 10.9 days and typically aggregates up to 3.86" (98mm) of snow.
When is Daylight Saving Time (DST) in Hillside?
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 Hillside?
May is the month with the most rainfall in Hillside, Illinois. Rain falls for 17.3 days and accumulates 3.11" (79mm) of precipitation.
When it does not snow in Hillside?
June through September are months without snowfall.
When are the longest days in Hillside?
With an average of 15h and 12min of daylight, June has the longest days of the year in Hillside, Illinois.
What are the months with the highest UV index in Hillside?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Hillside.
What part of the year is the hottest in Hillside?
During the warmest month in Hillside, July, temperatures average a high of 81.9°F (27.7°C) and a low of 66.6°F (19.2°C).
What is the month with the most sunshine in Hillside?
July and August, with an average of 10.1h of sunshine, are months with the most sunshine in Hillside, Illinois.
What is the least humid month in Hillside?
October is the least humid month in Hillside, with an average relative humidity of 72%.
What is the driest month in Hillside?
The month with the least rainfall is December, when the rain falls for 7.9 days and typically collects 1.14" (29mm) of precipitation.
What is the month with the shortest days in Hillside?
December has the shortest days of the year in Hillside, Illinois, with an average of 9h and 12min of daylight.
Average temperature
Hillside, IL
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure
Hillside, 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:
30.01"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
Hillside, IL
- Average wind speed in January:
10.2mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.7mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.3mph
- 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:
9.1mph - Average wind speed in November:
9.7mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity
Hillside, 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
Hillside, IL
- Average rainfall in January:
1.34" - Average rainfall in February:
1.42" - Average rainfall in March:
1.46" - Average rainfall in April:
2.76" - Average rainfall in May:
3.11" - Average rainfall in June:
2.83"
- Average rainfall in July:
2.87" - Average rainfall in August:
2.83" - Average rainfall in September:
1.89" - Average rainfall in October:
2.17" - Average rainfall in November:
1.26" - Average rainfall in December:
1.14"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.14").
Average rainfall days
Hillside, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
16.2 days
- Average rainfall days in July:
17.3 days - Average rainfall days in August:
16.6 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
13 days - Average rainfall days in November:
9.1 days - Average rainfall days in December:
7.9 days
The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is February (5.1 days).
Average snowfall
Hillside, IL
- Average snowfall in January:
3.62" - Average snowfall in February:
3.86" - Average snowfall in March:
1.18" - Average snowfall in April:
2.01" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (3.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Hillside, IL
- Average snowfall days in January:
12.4 days - Average snowfall days in February:
10.9 days - Average snowfall days in March:
6.3 days - Average snowfall days in April:
2.3 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:
0.4 days - Average snowfall days in November:
3.5 days - Average snowfall days in December:
9.9 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Hillside, 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:
6h and 0min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 0min - Average sunshine in December:
4h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Hillside, IL
- Average sunshine days in January:
14.2 days - Average sunshine days in February:
11.5 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
11 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
9.5 days - Average sunshine days in August:
11.3 days - Average sunshine days in September:
13 days - Average sunshine days in October:
14.2 days - Average sunshine days in November:
16.8 days - Average sunshine days in December:
15.3 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is July (9.5 days).
Average UV index
Hillside, 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
Hillside, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Hillside, 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).
Hillside, Illinois, USA
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