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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 Rosemont, Illinois, is another subzero cold winter month, with an average temperature varying between 18.1°F (-7.7°C) and 28.8°F (-1.8°C). In Rosemont, January records the lowest average temperatures, peaking at 28.8°F (-1.8°C) and reaching a low of 18.1°F (-7.7°C). Weather in January »
Weather in February
February, the last month of the winter in Rosemont, is an icy month, with temperature in the range of an average low of 20.7°F (-6.3°C) and an average high of 32.2°F (0.1°C). February's presence marks an average high-temperature of a cold 32.2°F (0.1°C), subtly varied from January's 28.8°F (-1.8°C). Weather in February »
Weather in March
March, the first month of the spring in Rosemont, is a chilly month, with an average temperature varying between 31.1°F (-0.5°C) and 43.7°F (6.5°C). As February gives way to March, the average high-temperature displays an increase, moving from a cold 32.2°F (0.1°C) to a frosty 43.7°F (6.5°C). Weather in March »
Weather in April
April is a cool spring month in Rosemont, Illinois, with temperature in the range of an average high of 54.1°F (12.3°C) and an average low of 40.5°F (4.7°C). With the arrival of April, the average high-temperature transitions from a frosty 43.7°F (6.5°C) in March to a fresh 54.1°F (12.3°C). Weather in April »
Weather in May
May, the last month of the spring in Rosemont, is an enjoyable month, with an average temperature varying between 65.8°F (18.8°C) and 51.1°F (10.6°C). A shift in the average high-temperature is noticeable in May, changing from a fresh 54.1°F (12.3°C) in April to a refreshing 65.8°F (18.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Rosemont, Illinois, with an average temperature ranging between max 75.7°F (24.3°C) and min 60.6°F (15.9°C). The onset of June brings a rise in the average high-temperature, elevating from a refreshing 65.8°F (18.8°C) in May to a warm 75.7°F (24.3°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Rosemont, Illinois, with an average temperature fluctuating between 81°F (27.2°C) and 66.7°F (19.3°C). The warmest period tends to be July, when average temperatures fluctuate between a high of 81°F (27.2°C) and a low of 66.7°F (19.3°C). In July, the average heat index is evaluated at a tropical 86°F (30°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Rosemont, Illinois, with an average temperature varying between 80.1°F (26.7°C) and 66.2°F (19°C). The commencement of August brings an average high-temperature of a still warm 80.1°F (26.7°C), marking an inconsequential divergence from July. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Rosemont, Illinois, with an average temperature ranging between min 59.5°F (15.3°C) and max 73.4°F (23°C). The onset of September entails a subtle temperature shift, as the average high-temperature eases from a moderately hot 80.1°F (26.7°C) in August to a still warm 73.4°F (23°C). Weather in September »
Weather in October
October, the same as September, in Rosemont, Illinois, is another refreshing autumn month, with an average temperature varying between 47.1°F (8.4°C) and 59.9°F (15.5°C). A shift in Rosemont's weather is observed as September turns into October, with the average high temperature reducing from a warm 73.4°F (23°C) to a mild 59.9°F (15.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Rosemont, is also a frosty month, with an average temperature varying between 34.3°F (1.3°C) and 45.5°F (7.5°C). As November begins, there is a noticeable decrease in the average high-temperature, falling from a mild 59.9°F (15.5°C) in October to a frosty 45.5°F (7.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Rosemont, Illinois, with an average temperature fluctuating between 34.7°F (1.5°C) and 25.5°F (-3.6°C). As December arrives, Rosemont's weather displays a decrease in high-temperatures, transitioning from November's frosty 45.5°F (7.5°C) to an icy 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 is the coldest month in Rosemont?
Rosemont's January weather, with an average high temperature of 28.8°F (-1.8°C) and an average low temperature of 18.1°F (-7.7°C), tends to be the coldest of the year.
What is the most humid month in Rosemont?
The months with the highest humidity in Rosemont, Illinois, are January and February, with an average relative humidity of 82%.
How much does it rain in Rosemont?
In Rosemont, Illinois, during the entire year, the rain falls for 146.5 days and collects up to 24.13" (613mm) of precipitation.
When does it snow in Rosemont?
January through May, October through December are months with snowfall in Rosemont, Illinois.
How many days does it snow in Rosemont?
Throughout the year, in Rosemont, there are 44.8 snowfall days, and 12.83" (326mm) of snow is accumulated.
What is the month with the least sunshine in Rosemont?
The month with the least sunshine in Rosemont, Illinois, is January, with an average of 3.7h of sunshine.
What is the month with the lowest UV index in Rosemont?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the snowiest month in Rosemont?
The month with the most snowfall in Rosemont is February, when snow falls for 9.8 days and typically aggregates up to 3.39" (86mm) of snow.
When is Daylight Saving Time (DST) in Rosemont?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Rosemont, Illinois, 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 Rosemont?
The month with the most rainfall in Rosemont, Illinois, is May, when the rain falls for 16.8 days and typically aggregates up to 3.15" (80mm) of precipitation.
When it does not snow in Rosemont?
In Rosemont, Illinois, snow does not fall in June through September.
When are the longest days in Rosemont?
June has the longest days of the year in Rosemont, with an average of 15h and 12min of daylight.
What is the month with the highest UV index in Rosemont?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Rosemont.
What are the warmest months in Rosemont?
July proves to be the warmest month in Rosemont, recording an average peak temperature of 81°F (27.2°C) and a minimum temperature of 66.7°F (19.3°C).
What month has the most sunshine in Rosemont?
With an average of 10.2h of sunshine, July has the most sunshine of the year in Rosemont.
What is the least humid month in Rosemont?
The least humid month in Rosemont is October, with an average relative humidity of 72%.
What is the driest month in Rosemont?
The month with the least rainfall in Rosemont is December, when the rain falls for 7.1 days and typically collects 0.91" (23mm) of precipitation.
What is the month with the shortest days in Rosemont?
December has the shortest days of the year in Rosemont, Illinois, with an average of 9h and 12min of daylight.
Average temperature
Rosemont, IL
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure
Rosemont, 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
Rosemont, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.4mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10mph - Average wind speed in May:
8.5mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.6mph - Average wind speed in November:
10.2mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity
Rosemont, 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
Rosemont, IL
- Average rainfall in January:
1.26" - Average rainfall in February:
1.22" - Average rainfall in March:
1.38" - Average rainfall in April:
2.6" - Average rainfall in May:
3.15" - Average rainfall in June:
2.95"
- Average rainfall in July:
2.68" - Average rainfall in August:
2.87" - Average rainfall in September:
1.97" - Average rainfall in October:
2.01" - Average rainfall in November:
1.14" - Average rainfall in December:
0.91"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is December (0.91").
Average rainfall days
Rosemont, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
10.4 days - Average rainfall days in April:
15.2 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
17.5 days - Average rainfall days in August:
16 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
13.4 days - Average rainfall days in November:
9.2 days - Average rainfall days in December:
7.1 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is February (5.3 days).
Average snowfall
Rosemont, IL
- Average snowfall in January:
3.35" - Average snowfall in February:
3.39" - Average snowfall in March:
1.1" - 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 (3.39").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Rosemont, IL
- Average snowfall days in January:
11.7 days - Average snowfall days in February:
9.8 days - Average snowfall days in March:
6.2 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:
0.5 days - Average snowfall days in November:
4.1 days - Average snowfall days in December:
10.1 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Rosemont, 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 3min - Average sunshine in May:
8h and 3min - 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 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: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Rosemont, IL
- Average sunshine days in January:
13.9 days - Average sunshine days in February:
12.3 days - Average sunshine days in March:
14.5 days - Average sunshine days in April:
11.9 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
11.4 days
- Average sunshine days in July:
10.3 days - Average sunshine days in August:
10.6 days - Average sunshine days in September:
13.2 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
17.1 days - Average sunshine days in December:
16.9 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is July (10.3 days).
Average UV index
Rosemont, 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
Rosemont, 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 30).
Average visibility
Rosemont, 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).
Rosemont, Illinois, USA
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