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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 Island Lake, Illinois, is a freezing cold winter month, with temperature in the range of an average high of 27°F (-2.8°C) and an average low of 15.3°F (-9.3°C). January, on average, is the coldest month, registering a high temperature of 27°F (-2.8°C) and a low of 15.3°F (-9.3°C). Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Island Lake, Illinois, with an average temperature fluctuating between 18°F (-7.8°C) and 30.6°F (-0.8°C). February's arrival registers an average high-temperature of a still freezing cold 30.6°F (-0.8°C), closely aligning with the temperature of the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Island Lake, Illinois, with an average temperature varying between 43.5°F (6.4°C) and 29.7°F (-1.3°C). The arrival of March signals an increase in the average high-temperature, moving from a freezing cold 30.6°F (-0.8°C) in February to a chilly 43.5°F (6.4°C). Weather in March »
Weather in April
April in Island Lake, Illinois, is a fresh spring month, with an average temperature varying between 54.7°F (12.6°C) and 38.8°F (3.8°C). The onset of April brings a rise in the average high-temperature, elevating from a chilly 43.5°F (6.4°C) in March to a fresh 54.7°F (12.6°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Island Lake, Illinois, with temperature in the range of an average low of 49.8°F (9.9°C) and an average high of 66.7°F (19.3°C). The arrival of May brings a temperature shift, with the average high-temperature escalating from a fresh 54.7°F (12.6°C) in April to a comfortable 66.7°F (19.3°C). Weather in May »
Weather in June
June, the first month of the summer in Island Lake, is a warm month, with an average temperature fluctuating between 76.1°F (24.5°C) and 59.2°F (15.1°C). With the transition into June, Island Lake experiences an increase in average high-temperatures, moving up from a comfortable 66.7°F (19.3°C) in May to a moderately hot 76.1°F (24.5°C). Weather in June »
Weather in July
July, like June, in Island Lake, Illinois, is a moderately hot summer month, with temperature in the range of an average high of 79.9°F (26.6°C) and an average low of 63.5°F (17.5°C). July is the month when Island Lake, Illinois, experiences its warmest temperatures, averaging a high of 79.9°F (26.6°C) and a low of 63.5°F (17.5°C). Weather in July »
Weather in August
August, the last month of the summer in Island Lake, is also a moderately hot month, with an average temperature ranging between min 62.2°F (16.8°C) and max 78.4°F (25.8°C). With the onset of August, the average high-temperature stands at a still warm 78.4°F (25.8°C), closely aligned with July's 79.9°F (26.6°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Island Lake, Illinois, with an average temperature ranging between min 55.8°F (13.2°C) and max 72.5°F (22.5°C). A minor decrease in the average high-temperature is observed during September, shifting from a moderately hot 78.4°F (25.8°C) in August to a pleasant 72.5°F (22.5°C). Weather in September »
Weather in October
October, the same as September, in Island Lake, Illinois, is another mild autumn month, with temperature in the range of an average low of 44.2°F (6.8°C) and an average high of 59°F (15°C). A decrease in the average high-temperature is observed during October, shifting from a pleasant 72.5°F (22.5°C) in September to a refreshing 59°F (15°C). Weather in October »
Weather in November
November, the last month of the autumn in Island Lake, is also a frosty month, with an average temperature fluctuating between 45.1°F (7.3°C) and 32.4°F (0.2°C). November indicates a shift in the average high-temperature, from October's mild 59°F (15°C) to a frosty 45.1°F (7.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Island Lake, Illinois, with temperature in the range of an average low of 23.2°F (-4.9°C) and an average high of 33.3°F (0.7°C). In Island Lake, the beginning of December is marked by a lowered average high-temperature, shifting from November's chilly 45.1°F (7.3°C) to an icy 33.3°F (0.7°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 time of year in Island Lake?
In Island Lake, the lowest temperatures are generally noted in January, averaging a high of 27°F (-2.8°C) and a low of 15.3°F (-9.3°C).
What is the most humid month in Island Lake?
The months with the highest humidity are January and February, with an average relative humidity of 84%.
How many days does it rain in Island Lake?
In Island Lake, during the entire year, the rain falls for 151.2 days and collects up to 24.17" (614mm) of precipitation.
When does it snow in Island Lake?
Months with snowfall are January through May, October through December.
When does it snow the most in Island Lake?
The month with the most snowfall in Island Lake is January, when snow falls for 13.2 days and typically aggregates up to 3.82" (97mm) of snow.
How much does it snow in Island Lake?
In Island Lake, during the entire year, snow falls for 48.9 days and aggregates up to 14.76" (375mm) of snow.
What is the month with the least sunshine in Island Lake?
The month with the least sunshine is January, with an average of 3.6h of sunshine.
What is the month with the lowest UV index in Island Lake?
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Island Lake, Illinois.
When is Daylight Saving Time (DST) in Island 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 Island Lake?
The month with the most rainfall is June, when the rain falls for 17.2 days and typically aggregates up to 3.15" (80mm) of precipitation.
When it does not snow in Island Lake?
In Island Lake, Illinois, snow does not fall in June through September.
When are the longest days in Island Lake?
The month with the longest days is June, with an average of 15h and 12min of daylight.
What is the warmest month in Island Lake?
Island Lake's temperature records reveal July as the warmest month, marked by average highs of 79.9°F (26.6°C) and lows of 63.5°F (17.5°C).
What month has the most sunshine in Island Lake?
The month with the most sunshine in Island Lake, Illinois, is July, with an average of 10h of sunshine.
What is the month with the highest UV index in Island Lake?
With an average maximum UV index of 6, August is the month with the highest UV index in Island Lake, Illinois.
What is the least humid month in Island Lake?
With an average relative humidity of 75%, October is the least humid month in Island Lake.
What is the driest month in Island Lake?
The month with the least rainfall in Island Lake, Illinois, is December, when the rain falls for 8 days and typically collects 1.1" (28mm) of precipitation.
What is the month with the shortest days in Island Lake?
With an average of 9h and 6min of daylight, December has the shortest days of the year in Island Lake, Illinois.
Average temperature
Island 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°F).
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure
Island Lake, 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
Island Lake, IL
- Average wind speed in January:
10mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.2mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.3mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Island Lake, IL
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall
Island Lake, IL
- Average rainfall in January:
1.3" - Average rainfall in February:
1.34" - Average rainfall in March:
1.42" - Average rainfall in April:
2.83" - Average rainfall in May:
2.83" - Average rainfall in June:
3.15"
- Average rainfall in July:
2.52" - Average rainfall in August:
2.68" - Average rainfall in September:
1.69" - Average rainfall in October:
2.09" - Average rainfall in November:
1.22" - Average rainfall in December:
1.1"
The wettest month (with the highest rainfall) is June (3.15").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days
Island Lake, IL
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
11.7 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
18.1 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
18.8 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
12.4 days - Average rainfall days in October:
13.7 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
8 days
The month with the highest number of rainy days is July (18.8 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall
Island Lake, IL
- Average snowfall in January:
3.82" - Average snowfall in February:
3.43" - Average snowfall in March:
1.77" - Average snowfall in April:
1.97" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Island Lake, IL
- Average snowfall days in January:
13.2 days - Average snowfall days in February:
10.8 days - Average snowfall days in March:
7.2 days - Average snowfall days in April:
2.4 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:
3.9 days - Average snowfall days in December:
10.8 days
The month with the highest number of snowfall days is January (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Island 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:
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 0min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Island Lake, IL
- Average sunshine days in January:
13.7 days - Average sunshine days in February:
11.6 days - Average sunshine days in March:
13.9 days - Average sunshine days in April:
10.8 days - Average sunshine days in May:
10.3 days - Average sunshine days in June:
10 days
- Average sunshine days in July:
10.4 days - Average sunshine days in August:
10.6 days - Average sunshine days in September:
14.2 days - Average sunshine days in October:
14.2 days - Average sunshine days in November:
16.2 days - Average sunshine days in December:
14.8 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (10 days).
Average UV index
Island Lake, IL
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Island Lake, IL
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility
Island Lake, IL
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Island Lake, Illinois, USA
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