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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 Long Grove, Illinois, is a freezing cold winter month, with temperature in the range of an average low of 17.6°F (-8°C) and an average high of 28°F (-2.2°C). In Long Grove, the month of January is known for its lowest average temperatures, reaching a high of 28°F (-2.2°C) and a low of 17.6°F (-8°C). Weather in January »
Weather in February
February, the last month of the winter in Long Grove, is another freezing cold month, with an average temperature fluctuating between 31.5°F (-0.3°C) and 20.1°F (-6.6°C). February's onset brings an average high-temperature of a still subzero cold 31.5°F (-0.3°C), showing a minute difference from January's 28°F (-2.2°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Long Grove, Illinois, with an average temperature fluctuating between 43.3°F (6.3°C) and 30.6°F (-0.8°C). An increase in the average high-temperature marks March, moving from February's freezing cold 31.5°F (-0.3°C) to a chilly 43.3°F (6.3°C). Weather in March »
Weather in April
April in Long Grove, Illinois, is a fresh spring month, with temperature in the range of an average high of 54.1°F (12.3°C) and an average low of 39.4°F (4.1°C). With the onset of April, Long Grove's average high-temperature sees a rise, moving from March's chilly 43.3°F (6.3°C) to a cool 54.1°F (12.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Long Grove, Illinois, with an average temperature ranging between max 65.8°F (18.8°C) and min 50.5°F (10.3°C). Entering May, Long Grove sees a temperature rise, with the average high-temperature advancing from April's cool 54.1°F (12.3°C) to a comfortable 65.8°F (18.8°C). Weather in May »
Weather in June
June, the first month of the summer in Long Grove, is a warm month, with an average temperature fluctuating between 75.7°F (24.3°C) and 59.9°F (15.5°C). June's arrival brings a temperature shift, moving from a comfortable 65.8°F (18.8°C) in May to a moderately hot 75.7°F (24.3°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Long Grove, Illinois, with an average temperature fluctuating between 65.8°F (18.8°C) and 81°F (27.2°C). July, recognised by an average high temperature of 81°F (27.2°C) and a low of 65.8°F (18.8°C), is Long Grove's warmest month. In July, the heat index is computed to be a hot 86°F (30°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Long Grove, Illinois, with an average temperature varying between 79.7°F (26.5°C) and 64.9°F (18.3°C). The beginning of August records an average high-temperature of a still moderately hot 79.7°F (26.5°C), almost echoing the conditions of the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Long Grove, Illinois, with an average temperature ranging between max 73°F (22.8°C) and min 58.1°F (14.5°C). The transition into September involves a small decrease in the average high-temperature, dipping slightly from a moderately hot 79.7°F (26.5°C) in August to a pleasant 73°F (22.8°C). Weather in September »
Weather in October
October, the same as September, in Long Grove, Illinois, is another refreshing autumn month, with an average temperature fluctuating between 59.7°F (15.4°C) and 46.2°F (7.9°C). The decrease of average high-temperatures is mild in October, with a decline from a pleasant 73°F (22.8°C) in September to a refreshing 59.7°F (15.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Long Grove, Illinois, with temperature in the range of an average low of 33.6°F (0.9°C) and an average high of 45.5°F (7.5°C). As October transitions to November, the average high-temperature falls from a mild 59.7°F (15.4°C) to a chilly 45.5°F (7.5°C). Weather in November »
Weather in December
December, the first month of the winter in Long Grove, is still a cold month, with an average temperature ranging between min 24.8°F (-4°C) and max 34.5°F (1.4°C). The commencement of December involves a temperature shift, with the average high-temperature dropping from a frosty 45.5°F (7.5°C) in November to a wintry 34.5°F (1.4°C). Weather in December »
Updated: Jul 6, 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 Long Grove, January is the coldest month, with temperatures averaging a high of 28°F (-2.2°C) and a low of 17.6°F (-8°C).
What is the most humid month?
With an average relative humidity of 83%, January is the most humid month.
How many days does it rain?
Throughout the year, there are 154.2 rainfall days, and 28.94" (735mm) of precipitation is accumulated.
When does it snow?
January through May, October through December are months with snowfall in Long Grove.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 12.5 days and accumulates 4.8" (122mm) of snow.
How many days does it snow?
In Long Grove, Illinois, during the entire year, snow falls for 45.4 days and aggregates up to 16.85" (428mm) of snow.
What is the month with the least sunshine in Long Grove?
With an average of 3.7h of sunshine, January has the least sunshine of the year.
When is Daylight Saving Time (DST)?
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 rainiest month?
May is the month with the most rainfall. Rain falls for 17.6 days and accumulates 3.66" (93mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
The month with the longest days in Long Grove is June, with an average of 15h and 12min of daylight.
When is the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What are the warmest months?
Long Grove experiences its highest temperatures in July, with an average peak of 81°F (27.2°C) and a low of 65.8°F (18.8°C).
What month has the most sunshine?
August has the most sunshine of the year in Long Grove, with an average of 10.3h of sunshine.
What is the least humid month?
October is the least humid month, with an average relative humidity of 73%.
What is the driest month?
December is the month with the least rainfall. Rain falls for 8.4 days and accumulates 1.34" (34mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
When is the lowest UV index?
The month with the lowest UV index is December, with an average maximum UV index of 1.
Average temperature
Long Grove, 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°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure
Long Grove, 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
Long Grove, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.2mph - Average wind speed in March:
9.7mph - 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:
6.7mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.2mph - Average wind speed in November:
9.9mph - 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 (6.5mph).
Average humidity
Long Grove, IL
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Long Grove, IL
- Average rainfall in January:
1.57" - Average rainfall in February:
1.61" - Average rainfall in March:
1.77" - Average rainfall in April:
3.35" - Average rainfall in May:
3.66" - Average rainfall in June:
3.54"
- Average rainfall in July:
2.95" - Average rainfall in August:
2.8" - Average rainfall in September:
2.24" - Average rainfall in October:
2.56" - Average rainfall in November:
1.54" - Average rainfall in December:
1.34"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is December (1.34").
Average rainfall days
Long Grove, IL
- Average rainfall days in January:
6.5 days - Average rainfall days in February:
5.9 days - Average rainfall days in March:
11 days - Average rainfall days in April:
16.6 days - Average rainfall days in May:
17.6 days - Average rainfall days in June:
17.1 days
- Average rainfall days in July:
17.3 days - Average rainfall days in August:
16.1 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
14.4 days - Average rainfall days in November:
9.8 days - Average rainfall days in December:
8.4 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (5.9 days).
Average snowfall
Long Grove, IL
- Average snowfall in January:
4.8" - Average snowfall in February:
4.45" - Average snowfall in March:
1.22" - Average snowfall in April:
1.89" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Long Grove, IL
- Average snowfall days in January:
12.5 days - Average snowfall days in February:
10.8 days - Average snowfall days in March:
6.2 days - Average snowfall days in April:
2 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 days - Average snowfall days in December:
9.3 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Long Grove, 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:
6h and 0min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 4min - 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 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Long Grove, IL
- Average sunshine days in January:
13.5 days - Average sunshine days in February:
11.9 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
10.3 days - Average sunshine days in May:
11.4 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
11.6 days - Average sunshine days in August:
12.8 days - Average sunshine days in September:
13.9 days - Average sunshine days in October:
14 days - Average sunshine days in November:
15.7 days - Average sunshine days in December:
15.6 days
The month with the most sunshine days is November (15.7 days).
The month with the least sunshine days is April (10.3 days).
Average UV index
Long Grove, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Long Grove, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Long Grove, 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).
Long Grove, Illinois, USA
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