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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 Beach, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 16.5°F (-8.6°C) and 27.5°F (-2.5°C). January, characterized by an average high temperature of 27.5°F (-2.5°C) and a low temperature of 16.5°F (-8.6°C), is generally the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Round Lake Beach, is another freezing cold month, with an average temperature fluctuating between 18.7°F (-7.4°C) and 30.6°F (-0.8°C). February experiences an average high-temperature of a still freezing cold 30.6°F (-0.8°C), barely different 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 Beach, is a chilly month, with an average temperature fluctuating between 42.8°F (6°C) and 30.2°F (-1°C). Round Lake Beach, Illinois, sees an increase in the average high-temperature with the arrival of March, moving from February's freezing cold 30.6°F (-0.8°C) to a chilly 42.8°F (6°C). Weather in March »
Weather in April
April in Round Lake Beach, Illinois, is a fresh spring month, with an average temperature ranging between min 38.8°F (3.8°C) and max 53.6°F (12°C). As Round Lake Beach enters April, the average high-temperature increases from the a frosty 42.8°F (6°C) of March to a cool 53.6°F (12°C). Weather in April »
Weather in May
May, the last month of the spring in Round Lake Beach, is an enjoyable month, with an average temperature fluctuating between 49.6°F (9.8°C) and 65.3°F (18.5°C). May comes with an increase, with the average high-temperature moving from a cool 53.6°F (12°C) in April to a refreshing 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 Beach, Illinois, with an average temperature varying between 74.8°F (23.8°C) and 58.8°F (14.9°C). The onset of June marks an increase in the average high-temperature, moving from a comfortable 65.3°F (18.5°C) in May to a moderately hot 74.8°F (23.8°C). Weather in June »
Weather in July
July, like June, in Round Lake Beach, Illinois, is a moderately hot summer month, with an average temperature ranging between min 64.4°F (18°C) and max 79.9°F (26.6°C). In Round Lake Beach, July is identified by the highest average temperatures, reaching a peak of 79.9°F (26.6°C) and a low of 64.4°F (18°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Round Lake Beach, Illinois, with an average temperature varying between 78.6°F (25.9°C) and 63.1°F (17.3°C). Round Lake Beach registers an average high-temperature of a still moderately hot 78.6°F (25.9°C) with the arrival of August, showing minor deviation from the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Round Lake Beach, is also an agreeable month, with an average temperature fluctuating between 72.3°F (22.4°C) and 57°F (13.9°C). With the commencement of September, Round Lake Beach records a moderate temperature decline, with the average high easing from August's warm 78.6°F (25.9°C) to a pleasant 72.3°F (22.4°C). Weather in September »
Weather in October
October, the same as September, in Round Lake Beach, Illinois, is another refreshing autumn month, with an average temperature fluctuating between 45.1°F (7.3°C) and 59°F (15°C). The start of October comes with a reduction in the average high-temperature, receding from a pleasant 72.3°F (22.4°C) in September to a refreshing 59°F (15°C). Weather in October »
Weather in November
November, the last month of the autumn in Round Lake Beach, is another chilly month, with temperature in the range of an average low of 32.9°F (0.5°C) and an average high of 45.1°F (7.3°C). Round Lake Beach in November undergoes a mild reduction in the average high-temperature, shifting from October's moderate 59°F (15°C) to a frosty 45.1°F (7.3°C). Weather in November »
Weather in December
December, the first month of the winter in Round Lake Beach, is also a wintry month, with an average temperature varying between 33.6°F (0.9°C) and 23.9°F (-4.5°C). December shows a mild decline in the average high-temperature, falling from November's frosty 45.1°F (7.3°C) to an icy 33.6°F (0.9°C). Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in Round Lake Beach?
With average temperatures fluctuating between a high of 27.5°F (-2.5°C) and a low of 16.5°F (-8.6°C), January stands out as the coldest month in Round Lake Beach, Illinois.
What is the most humid month in Round Lake Beach?
January and February, with an average relative humidity of 83%, are most humid months in Round Lake Beach, Illinois.
How many days does it rain in Round Lake Beach?
In Round Lake Beach, during the entire year, the rain falls for 142.3 days and collects up to 21.97" (558mm) of precipitation.
When does it snow in Round Lake Beach?
Months with snowfall in Round Lake Beach, Illinois, are January through May, October through December.
When does it snow the most in Round Lake Beach?
The month with the most snowfall in Round Lake Beach, Illinois, 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 Beach?
In Round Lake Beach, Illinois, during the entire year, snow falls for 49.5 days and aggregates up to 13.54" (344mm) of snow.
What is the month with the least sunshine in Round Lake Beach?
With an average of 3.7h of sunshine, January has the least sunshine of the year in Round Lake Beach, Illinois.
What is the month with the lowest UV index in Round Lake Beach?
The months with the lowest UV index in Round Lake Beach are January and December, with an average maximum UV index of 1.
When is Daylight Saving Time (DST) in Round Lake Beach?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Round Lake Beach, 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 Round Lake Beach?
The month with the most rainfall in Round Lake Beach, Illinois, 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 Beach?
June through September are months without snowfall in Round Lake Beach, Illinois.
When are the longest days in Round Lake Beach?
The month with the longest days in Round Lake Beach is June, with an average of 15h and 12min of daylight.
What month is the hottest in Round Lake Beach?
In Round Lake Beach, July is the month with the highest recorded average temperatures, measuring a high of 79.9°F (26.6°C) and a low of 64.4°F (18°C).
What are the months with the highest UV index in Round Lake Beach?
The months with the highest UV index in Round Lake Beach are July and August, with an average maximum UV index of 6.
What month has the most sunshine in Round Lake Beach?
August has the most sunshine of the year, with an average of 10.2h of sunshine.
What is the least humid month in Round Lake Beach?
With an average relative humidity of 74%, October is the least humid month.
What is the driest month in Round Lake Beach?
The month with the least rainfall in Round Lake Beach is December, when the rain falls for 8.2 days and typically collects 0.98" (25mm) of precipitation.
What is the month with the shortest days in Round Lake Beach?
December has the shortest days of the year in Round Lake Beach, Illinois, with an average of 9h and 6min of daylight.
Average temperature
Round Lake Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, 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 Beach, Illinois, USA
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