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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, Illinois, is another subzero cold winter month, with an average temperature varying between 27.5°F (-2.5°C) and 16.5°F (-8.6°C). Temperature readings reach their annual highs in January, averaging 27.5°F (-2.5°C) and a minimum average of 16.5°F (-8.6°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Round Lake, Illinois, with an average temperature fluctuating between 18.7°F (-7.4°C) and 30.6°F (-0.8°C). Entering February, the average high-temperature is recorded at a still subzero cold 30.6°F (-0.8°C), exhibiting a minimal shift from January's 27.5°F (-2.5°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Round Lake, Illinois, with an average temperature fluctuating between 30.2°F (-1°C) and 42.8°F (6°C). A shift in the average high-temperature is noticeable in March, changing from a freezing 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, Illinois, is a cool spring month, with an average temperature fluctuating between 38.8°F (3.8°C) and 53.6°F (12°C). Round Lake in April shows a temperature shift, moving from an average high of a frosty 42.8°F (6°C) in March to a fresh 53.6°F (12°C). Weather in April »
Weather in May
May, the last month of the spring in Round Lake, is an enjoyable month, with an average temperature varying between 49.6°F (9.8°C) and 65.3°F (18.5°C). A rise in the average high-temperature is observed during May, moving from a fresh 53.6°F (12°C) in April to a refreshing 65.3°F (18.5°C). Weather in May »
Weather in June
June, the first month of the summer in Round Lake, is a warm month, with an average temperature ranging between max 74.8°F (23.8°C) and min 58.8°F (14.9°C). June shows a rise in the average high-temperature, moving from May's enjoyable 65.3°F (18.5°C) to a moderately hot 74.8°F (23.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Round Lake, Illinois, with an average temperature varying between 79.9°F (26.6°C) and 64.4°F (18°C). The temperatures reach their highest averages in July, with highs of 79.9°F (26.6°C) and lows of 64.4°F (18°C). Weather in July »
Weather in August
August, the last month of the summer in Round Lake, is also a moderately hot month, with an average temperature fluctuating between 63.1°F (17.3°C) and 78.6°F (25.9°C). On the advent of August, Round Lake's average high-temperature exhibits a minor adjustment to a still moderately hot 78.6°F (25.9°C) from July's 79.9°F (26.6°C). Weather in August »
Weather in September
September, the first month of the autumn in Round Lake, is also an agreeable month, with temperature in the range of an average low of 57°F (13.9°C) and an average high of 72.3°F (22.4°C). With the arrival of September, Round Lake experiences a modest decline in average high-temperatures, transitioning from a moderately hot 78.6°F (25.9°C) in August to a pleasant 72.3°F (22.4°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Round Lake, Illinois, with temperature in the range of an average low of 45.1°F (7.3°C) and an average high of 59°F (15°C). In October, the average high-temperature decreases from an agreeable 72.3°F (22.4°C) in September to a moderate 59°F (15°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Round Lake, Illinois, with temperature in the range of an average high of 45.1°F (7.3°C) and an average low of 32.9°F (0.5°C). As November arrives, Round Lake's weather displays a decrease in high-temperatures, transitioning from October's mild 59°F (15°C) 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, is also a wintry month, with an average temperature ranging between min 23.9°F (-4.5°C) and max 33.6°F (0.9°C). The arrival of December corresponds with a reduction in the average high-temperature, down from November's frosty 45.1°F (7.3°C) to a cold 33.6°F (0.9°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Round Lake?
Temperature records mark January as the coldest month, with highs averaging 27.5°F (-2.5°C) and lows at 16.5°F (-8.6°C).
What are the most humid months in Round Lake?
January and February, with an average relative humidity of 83%, are most humid months.
How much does it rain in Round Lake?
In Round Lake, Illinois, 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?
January through May, October through December are months with snowfall in Round Lake, Illinois.
When does it snow the most in Round Lake?
January is the month with the most snowfall. Snow falls for 13.7 days and accumulates 3.58" (91mm) of snow.
How many days does it snow in Round Lake?
In Round Lake, 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?
With an average of 3.7h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Round Lake?
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Round Lake.
When is Daylight Saving Time (DST) in Round Lake?
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 wettest month in Round Lake?
April is the month with the most rainfall in Round Lake, Illinois. Rain falls for 14.8 days and accumulates 2.72" (69mm) of precipitation.
When it does not snow in Round Lake?
June through September are months without snowfall in Round Lake, Illinois.
When are the longest days in Round Lake?
The month with the longest days in Round Lake is June, with an average of 15h and 12min of daylight.
What are the warmest months in Round Lake?
July, known for its average high temperature of 79.9°F (26.6°C) and an average low temperature of 64.4°F (18°C), is the warmest month.
What are the months with the highest UV index in Round Lake?
July and August, with an average maximum UV index of 6, are months with the highest UV index.
What month has the most sunshine in Round Lake?
The month with the most sunshine is August, with an average of 10.2h of sunshine.
What is the least humid month in Round Lake?
The least humid month is October, with an average relative humidity of 74%.
What is the driest month in Round Lake?
The month with the least rainfall in Round Lake 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?
The month with the shortest days in Round Lake, Illinois, is December, with an average of 9h and 6min of daylight.
Average temperature
Round Lake, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, Illinois, USA
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