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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 Round Lake Park, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 27.5°F (-2.5°C) and 16.5°F (-8.6°C). January stands out as Round Lake Park's coldest month, with an average high-temperature of 27.5°F (-2.5°C) and a low-temperature of 16.5°F (-8.6°C). Weather in January »
Weather in February
February, the last month of the winter in Round Lake Park, is another freezing cold month, with an average temperature varying between 30.6°F (-0.8°C) and 18.7°F (-7.4°C). The commencement of February records an average high-temperature of a still freezing cold 30.6°F (-0.8°C), barely varying from January's 27.5°F (-2.5°C). Weather in February »
Weather in March
March, the first month of the spring in Round Lake Park, is a chilly month, with temperature in the range of an average low of 30.2°F (-1°C) and an average high of 42.8°F (6°C). March sees a temperature increase, moving from a subzero cold 30.6°F (-0.8°C) in February to a chilly 42.8°F (6°C). Weather in March »
Weather in April
April in Round Lake Park, Illinois, is a cool spring month, with an average temperature varying between 38.8°F (3.8°C) and 53.6°F (12°C). The transition to April introduces an increase in the average high-temperature, shifting from a chilly 42.8°F (6°C) in March to a cool 53.6°F (12°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in Round Lake Park, Illinois, with an average temperature varying between 49.6°F (9.8°C) and 65.3°F (18.5°C). As April transitions into May, Round Lake Park sees a rise in the average high-temperature, moving from a fresh 53.6°F (12°C) to a comfortable 65.3°F (18.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Round Lake Park, Illinois, with temperature in the range of an average low of 58.8°F (14.9°C) and an average high of 74.8°F (23.8°C). As Round Lake Park transitions into June, the average high-temperature shows a change, moving from a refreshing 65.3°F (18.5°C) in May to a warm 74.8°F (23.8°C). Weather in June »
Weather in July
July, like June, in Round Lake Park, Illinois, is another warm summer month, with an average temperature varying between 79.9°F (26.6°C) and 64.4°F (18°C). July, with its high-temperature average of 79.9°F (26.6°C) and a low-temperature average of 64.4°F (18°C), is the warmest month. Weather in July »
Weather in August
August, the last month of the summer in Round Lake Park, is another warm month, with an average temperature fluctuating between 78.6°F (25.9°C) and 63.1°F (17.3°C). With the onset of August, Round Lake Park's average high-temperature clocks in at a still moderately hot 78.6°F (25.9°C), showing a minor fluctuation from the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Round Lake Park, Illinois, with an average temperature fluctuating between 57°F (13.9°C) and 72.3°F (22.4°C). The arrival of September is marked by a minor reduction in average high-temperature, sliding from a warm 78.6°F (25.9°C) in August to an agreeable 72.3°F (22.4°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Round Lake Park, Illinois, with an average temperature ranging between min 45.1°F (7.3°C) and max 59°F (15°C). Arrival of October comes with a reduction in the average high-temperature, falling from a pleasant 72.3°F (22.4°C) in September to a mild 59°F (15°C). Weather in October »
Weather in November
November, the last month of the autumn in Round Lake Park, is also a frosty month, with an average temperature fluctuating between 32.9°F (0.5°C) and 45.1°F (7.3°C). The transition into November involves a decrease in the average high-temperature, falling from a mild 59°F (15°C) in October to a chilly 45.1°F (7.3°C). Weather in November »
Weather in December
December, the first month of the winter in Round Lake Park, is still a cold month, with an average temperature fluctuating between 33.6°F (0.9°C) and 23.9°F (-4.5°C). The average high-temperature decreases in December, shifting from a frosty 45.1°F (7.3°C) in November to a wintry 33.6°F (0.9°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 Round Lake Park?
January, with an average high of 27.5°F (-2.5°C) and a low of 16.5°F (-8.6°C), signifies the coldest month of the year in Round Lake Park, Illinois.
What are the most humid months in Round Lake Park?
January and February, with an average relative humidity of 83%, are most humid months in Round Lake Park, Illinois.
How many days does it rain in Round Lake Park?
Throughout the year, there are 142.3 rainfall days, and 21.97" (558mm) of precipitation is accumulated.
When does it snow in Round Lake Park?
Months with snowfall are January through May, October through December.
When does it snow the most in Round Lake Park?
The month with the most snowfall is January, when snow falls for 13.7 days and typically aggregates up to 3.58" (91mm) of snow.
How much does it snow in Round Lake Park?
Throughout the year, in Round Lake Park, there are 49.5 snowfall days, and 13.54" (344mm) of snow is accumulated.
What is the month with the least sunshine in Round Lake Park?
The month with the least sunshine is January, with an average of 3.7h of sunshine.
When is the lowest UV index in Round Lake Park?
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Round Lake Park, Illinois.
When is Daylight Saving Time (DST) in Round Lake Park?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Round Lake Park, 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 in Round Lake Park?
The month with the most rainfall in Round Lake Park is April, when the rain falls for 14.8 days and typically aggregates up to 2.72" (69mm) of precipitation.
When it does not snow in Round Lake Park?
June through September are months without snowfall.
When are the longest days in Round Lake Park?
June has the longest days of the year, with an average of 15h and 12min of daylight.
What is the warmest month in Round Lake Park?
In Round Lake Park, Illinois, the peak average temperatures are observed in July, with a high of 79.9°F (26.6°C) and a low of 64.4°F (18°C).
When is the highest UV index in Round Lake Park?
The months with the highest UV index in Round Lake Park, Illinois, are July and August, with an average maximum UV index of 6.
What month has the most sunshine in Round Lake Park?
The month with the most sunshine in Round Lake Park is August, with an average of 10.2h of sunshine.
What is the least humid month in Round Lake Park?
The least humid month is October, with an average relative humidity of 74%.
What is the driest month in Round Lake Park?
December is the month with the least rainfall. Rain falls for 8.2 days and accumulates 0.98" (25mm) of precipitation.
What is the month with the shortest days in Round Lake Park?
With an average of 9h and 6min of daylight, December has the shortest days of the year in Round Lake Park, Illinois.
Average temperature
Round Lake Park, IL
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27.5°F).
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure
Round Lake Park, IL
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"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 months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Round Lake Park, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
9.8mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.4mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Round Lake Park, IL
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Round Lake Park, IL
- Average rainfall in January:
1.14" - Average rainfall in February:
1.22" - Average rainfall in March:
1.18" - Average rainfall in April:
2.72" - Average rainfall in May:
2.44" - Average rainfall in June:
2.6"
- Average rainfall in July:
2.48" - Average rainfall in August:
2.64" - Average rainfall in September:
1.57" - Average rainfall in October:
1.89" - Average rainfall in November:
1.1" - Average rainfall in December:
0.98"
The wettest month (with the highest rainfall) is April (2.72").
The driest month (with the least rainfall) is December (0.98").
Average rainfall days
Round Lake Park, IL
- Average rainfall days in January:
5.4 days - Average rainfall days in February:
5 days - Average rainfall days in March:
10.1 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
17 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
17.5 days - Average rainfall days in August:
16 days - Average rainfall days in September:
11.9 days - Average rainfall days in October:
13.2 days - Average rainfall days in November:
7.5 days - Average rainfall days in December:
8.2 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 days).
Average snowfall
Round Lake Park, IL
- Average snowfall in January:
3.58" - Average snowfall in February:
3.54" - Average snowfall in March:
1.22" - Average snowfall in April:
1.61" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Round Lake Park, IL
- Average snowfall days in January:
13.7 days - Average snowfall days in February:
10.7 days - Average snowfall days in March:
7.1 days - Average snowfall days in April:
2.5 days - Average snowfall days in May:
0.2 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:
4.4 days - Average snowfall days in December:
10.4 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Round Lake Park, 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 0min - 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 6min).
- 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 4min - 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 August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Round Lake Park, IL
- Average sunshine days in January:
13.7 days - Average sunshine days in February:
12.3 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
11.6 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
11.7 days
- Average sunshine days in July:
11.1 days - Average sunshine days in August:
11.7 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
17.1 days - Average sunshine days in December:
15.4 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is May (10.8 days).
Average UV index
Round Lake Park, IL
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Round Lake Park, IL
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 30).
Average visibility
Round Lake Park, IL
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Round Lake Park, Illinois, USA
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