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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 Harwood Heights, Illinois, is another subzero cold winter month, with an average temperature ranging between max 28.8°F (-1.8°C) and min 18.9°F (-7.3°C). Temperature records mark January as the coldest month, with highs averaging 28.8°F (-1.8°C) and lows at 18.9°F (-7.3°C). Weather in January »
Weather in February
February, the last month of the winter in Harwood Heights, is a cold month, with an average temperature ranging between max 32°F (0°C) and min 21°F (-6.1°C). The unfolding of February shows an average high-temperature of a cold 32°F (0°C), indicating a slight variance from January's 28.8°F (-1.8°C). Weather in February »
Weather in March
The first month of the spring, March, is still a cold month in Harwood Heights, Illinois, with an average temperature varying between 42.4°F (5.8°C) and 31.5°F (-0.3°C). March's arrival brings a temperature shift, moving from an icy 32°F (0°C) in February to a still cold 42.4°F (5.8°C). Weather in March »
Weather in April
April is a fresh spring month in Harwood Heights, Illinois, with temperature in the range of an average high of 53.1°F (11.7°C) and an average low of 40.5°F (4.7°C). April's arrival coincides with a temperature rise, moving from March's cold 42.4°F (5.8°C) to a fresh 53.1°F (11.7°C). Weather in April »
Weather in May
May, the last month of the spring in Harwood Heights, is a comfortable month, with an average temperature varying between 64°F (17.8°C) and 50.5°F (10.3°C). The arrival of May sees a shift in the average high-temperature, moving from a cool 53.1°F (11.7°C) in April to a refreshing 64°F (17.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Harwood Heights, Illinois, with an average temperature fluctuating between 73.8°F (23.2°C) and 60.4°F (15.8°C). June's arrival signals an increase in average high-temperatures, moving from May's comfortable 64°F (17.8°C) to a warm 73.8°F (23.2°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Harwood Heights, Illinois, with an average temperature ranging between max 79.7°F (26.5°C) and min 67.5°F (19.7°C). In Harwood Heights, the average temperatures in July are the highest, with a peak at 79.7°F (26.5°C) and a low of 67.5°F (19.7°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Harwood Heights, Illinois, with an average temperature varying between 79.2°F (26.2°C) and 66.7°F (19.3°C). August's onset brings an average high-temperature of a still moderately hot 79.2°F (26.2°C), showing a minute difference from July's 79.7°F (26.5°C). Weather in August »
Weather in September
September, the first month of the autumn in Harwood Heights, is also an agreeable month, with an average temperature varying between 72.3°F (22.4°C) and 59.9°F (15.5°C). Harwood Heights's progression into September involves a minor drop in the average high-temperature, slightly receding from a moderately hot 79.2°F (26.2°C) in August to a pleasant 72.3°F (22.4°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Harwood Heights, Illinois, with an average temperature ranging between max 59.9°F (15.5°C) and min 47.3°F (8.5°C). A subtle decrease in the average high-temperature marks October, falling from September's pleasant 72.3°F (22.4°C) to a refreshing 59.9°F (15.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Harwood Heights, Illinois, with an average temperature fluctuating between 35.2°F (1.8°C) and 45.7°F (7.6°C). Harwood Heights's November weather features a mild decline in high-temperatures, reducing from a refreshing 59.9°F (15.5°C) in October to a chilly 45.7°F (7.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Harwood Heights, Illinois, with an average temperature varying between 26.1°F (-3.3°C) and 35.1°F (1.7°C). The onset of December brings a small change in high-temperatures, falling from a chilly 45.7°F (7.6°C) in November to a wintry 35.1°F (1.7°C). Weather in December »
Updated: Aug 1, 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 is the month when Harwood Heights experiences its coldest temperatures, averaging a high of 28.8°F (-1.8°C) and a low of 18.9°F (-7.3°C).
What is the most humid month?
With an average relative humidity of 82%, January is the most humid month.
How many days does it rain in Harwood Heights?
Throughout the year, there are 98.2 rainfall days, and 7.36" (187mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, October through December.
How many days does it snow?
Throughout the year, there are 28.5 snowfall days, and 3.07" (78mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 3.7h of sunshine, January has the least sunshine of the year.
What are the months with the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
When does it snow the most?
February is the month with the most snowfall in Harwood Heights. Snow falls for 6.6 days and accumulates 0.98" (25mm) 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?
May is the month with the most rainfall. Rain falls for 12.3 days and accumulates 1.06" (27mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 12min of daylight.
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 month is the hottest?
In Harwood Heights, July records the average highest temperatures, peaking at 79.7°F (26.5°C) and reaching a low of 67.5°F (19.7°C).
What are the months with the most sunshine?
The months with the most sunshine are July and August, with an average of 10.4h of sunshine.
What is the least humid month in Harwood Heights?
October is the least humid month, with an average relative humidity of 72%.
What is the driest month?
December is the month with the least rainfall. Rain falls for 4.5 days and accumulates 0.31" (8mm) of precipitation.
What is the month with the shortest days?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Harwood Heights, IL
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Harwood Heights, 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
Harwood Heights, IL
- Average wind speed in January:
11.1mph - Average wind speed in February:
10.7mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.7mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7mph - Average wind speed in September:
8.3mph - Average wind speed in October:
10.1mph - Average wind speed in November:
10.7mph - Average wind speed in December:
10.4mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity
Harwood Heights, IL
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Harwood Heights, IL
- Average rainfall in January:
0.39" - Average rainfall in February:
0.39" - Average rainfall in March:
0.35" - Average rainfall in April:
0.71" - Average rainfall in May:
1.06" - Average rainfall in June:
0.94"
- Average rainfall in July:
0.87" - Average rainfall in August:
0.63" - Average rainfall in September:
0.67" - Average rainfall in October:
0.67" - Average rainfall in November:
0.35" - Average rainfall in December:
0.31"
The wettest month (with the highest rainfall) is May (1.06").
The driest month (with the least rainfall) is December (0.31").
Average rainfall days
Harwood Heights, IL
- Average rainfall days in January:
4.2 days - Average rainfall days in February:
2.8 days - Average rainfall days in March:
7.1 days - Average rainfall days in April:
10.5 days - Average rainfall days in May:
12.3 days - Average rainfall days in June:
12 days
- Average rainfall days in July:
11.5 days - Average rainfall days in August:
10.5 days - Average rainfall days in September:
9.4 days - Average rainfall days in October:
8.4 days - Average rainfall days in November:
5 days - Average rainfall days in December:
4.5 days
The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is February (2.8 days).
Average snowfall
Harwood Heights, IL
- Average snowfall in January:
0.83" - Average snowfall in February:
0.98" - Average snowfall in March:
0.12" - Average snowfall in April:
0.59" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Harwood Heights, IL
- Average snowfall days in January:
8.3 days - Average snowfall days in February:
6.6 days - Average snowfall days in March:
3.9 days - Average snowfall days in April:
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:
0.2 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
5.8 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Harwood Heights, 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 1min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 2min - 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:
3h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Harwood Heights, IL
- Average sunshine days in January:
22.9 days - Average sunshine days in February:
20.6 days - Average sunshine days in March:
21.1 days - Average sunshine days in April:
16.8 days - Average sunshine days in May:
16 days - Average sunshine days in June:
14.7 days
- Average sunshine days in July:
15.4 days - Average sunshine days in August:
17.2 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
19.7 days - Average sunshine days in November:
22.2 days - Average sunshine days in December:
23.3 days
The month with the most sunshine days is December (23.3 days).
The month with the least sunshine days is June (14.7 days).
Average UV index
Harwood Heights, 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
Harwood Heights, IL
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility
Harwood Heights, 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).
Harwood Heights, Illinois, USA
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