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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 Sleepy Hollow, Illinois, is another subzero cold winter month, with an average temperature varying between 27.3°F (-2.6°C) and 15.4°F (-9.2°C). During the coldest month, January, temperatures average a high of 27.3°F (-2.6°C) and a low of 15.4°F (-9.2°C). Weather in January »
Weather in February
February, the last month of the winter in Sleepy Hollow, is another freezing cold month, with an average temperature varying between 31.3°F (-0.4°C) and 18.9°F (-7.3°C). February ushers in an average high-temperature of a still subzero cold 31.3°F (-0.4°C), aligning closely with the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Sleepy Hollow, Illinois, with temperature in the range of an average low of 30.4°F (-0.9°C) and an average high of 44.2°F (6.8°C). March brings an increase in the average high-temperature, progressing from a subzero cold 31.3°F (-0.4°C) in February to a chilly 44.2°F (6.8°C). Weather in March »
Weather in April
April in Sleepy Hollow, Illinois, is a mild spring month, with an average temperature ranging between max 55.4°F (13°C) and min 39.7°F (4.3°C). With the onset of April, Sleepy Hollow's average high-temperature sees a rise, moving from March's frosty 44.2°F (6.8°C) to a moderate 55.4°F (13°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Sleepy Hollow, Illinois, with an average temperature ranging between max 67.6°F (19.8°C) and min 50.5°F (10.3°C). As Sleepy Hollow transitions into May, the average high-temperature shows a change, moving from a moderate 55.4°F (13°C) in April to a still refreshing 67.6°F (19.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Sleepy Hollow, Illinois, with an average temperature ranging between max 76.6°F (24.8°C) and min 59.4°F (15.2°C). Sleepy Hollow in June sees a temperature change, with average high-temperatures moving from an enjoyable 67.6°F (19.8°C) in May to a warm 76.6°F (24.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Sleepy Hollow, Illinois, with an average temperature ranging between max 80.6°F (27°C) and min 63.9°F (17.7°C). Sleepy Hollow, Illinois, experiences its highest average temperatures in July, reaching a peak of 80.6°F (27°C) and a minimum of 63.9°F (17.7°C). In July, the heat index is estimated at a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Sleepy Hollow, is also a moderately hot month, with an average temperature varying between 62.2°F (16.8°C) and 79°F (26.1°C). The advent of August brings an average high-temperature of a still moderately hot 79°F (26.1°C), exhibiting minor difference from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Sleepy Hollow, is also an agreeable month, with an average temperature fluctuating between 55.9°F (13.3°C) and 73°F (22.8°C). In Sleepy Hollow, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's warm 79°F (26.1°C) to a pleasant 73°F (22.8°C). Weather in September »
Weather in October
October, the same as September, in Sleepy Hollow, Illinois, is a moderate autumn month, with an average temperature varying between 59.9°F (15.5°C) and 44.2°F (6.8°C). Observing a mild shift, the average high-temperature during October reduces from September's pleasant 73°F (22.8°C) to a mild 59.9°F (15.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Sleepy Hollow, Illinois, with an average temperature ranging between max 45.1°F (7.3°C) and min 32.4°F (0.2°C). November is characterized by a clear drop in the average high-temperature, falling from October's mild 59.9°F (15.5°C) to a chilly 45.1°F (7.3°C). Weather in November »
Weather in December
December, the first month of the winter in Sleepy Hollow, is also a wintry month, with an average temperature varying between 33.4°F (0.8°C) and 23.4°F (-4.8°C). As December begins, there is a decrease in the average high-temperature, falling from a chilly 45.1°F (7.3°C) in November to a cold 33.4°F (0.8°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 Sleepy Hollow?
In Sleepy Hollow, January is known for its average lowest temperatures, reaching a high of 27.3°F (-2.6°C) and a low of 15.4°F (-9.2°C).
What is the most humid month in Sleepy Hollow?
With an average relative humidity of 84%, January is the most humid month in Sleepy Hollow.
How many days does it rain in Sleepy Hollow?
Throughout the year, in Sleepy Hollow, Illinois, there are 149.2 rainfall days, and 24.02" (610mm) of precipitation is accumulated.
When does it snow in Sleepy Hollow?
Months with snowfall in Sleepy Hollow are January through May, October through December.
What is the snowiest month in Sleepy Hollow?
The month with the most snowfall is January, when snow falls for 12.9 days and typically aggregates up to 3.62" (92mm) of snow.
How many days does it snow in Sleepy Hollow?
In Sleepy Hollow, Illinois, during the entire year, snow falls for 47.4 days and aggregates up to 13.07" (332mm) of snow.
What is the month with the least sunshine in Sleepy Hollow?
January has the least sunshine of the year in Sleepy Hollow, with an average of 3.6h of sunshine.
What is the month with the lowest UV index in Sleepy Hollow?
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Sleepy Hollow, Illinois.
When is Daylight Saving Time (DST) in Sleepy Hollow?
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 in Sleepy Hollow?
June is the month with the most rainfall in Sleepy Hollow, Illinois. Rain falls for 16.9 days and accumulates 3.03" (77mm) of precipitation.
When it does not snow in Sleepy Hollow?
June through September are months without snowfall in Sleepy Hollow, Illinois.
When are the longest days in Sleepy Hollow?
With an average of 15h and 12min of daylight, June has the longest days of the year in Sleepy Hollow.
What part of the year is the hottest in Sleepy Hollow?
July is Sleepy Hollow's warmest month, registering average high temperatures of 80.6°F (27°C) and lows of 63.9°F (17.7°C).
What month has the most sunshine in Sleepy Hollow?
With an average of 9.8h of sunshine, July has the most sunshine of the year in Sleepy Hollow.
What are the months with the highest UV index in Sleepy Hollow?
July and August, with an average maximum UV index of 6, are months with the highest UV index in Sleepy Hollow.
What is the least humid month in Sleepy Hollow?
The least humid month is October, with an average relative humidity of 75%.
What is the driest month in Sleepy Hollow?
December is the month with the least rainfall in Sleepy Hollow, Illinois. Rain falls for 8.1 days and accumulates 1.1" (28mm) of precipitation.
What is the month with the shortest days in Sleepy Hollow?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Sleepy Hollow, IL
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.3°F).
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure
Sleepy Hollow, 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
Sleepy Hollow, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.5mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.1mph - Average wind speed in October:
8.7mph - 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 (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Sleepy Hollow, IL
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall
Sleepy Hollow, IL
- Average rainfall in January:
1.26" - Average rainfall in February:
1.34" - Average rainfall in March:
1.38" - Average rainfall in April:
2.8" - Average rainfall in May:
2.95" - Average rainfall in June:
3.03"
- Average rainfall in July:
2.64" - Average rainfall in August:
2.68" - Average rainfall in September:
1.69" - Average rainfall in October:
2.01" - Average rainfall in November:
1.14" - Average rainfall in December:
1.1"
The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days
Sleepy Hollow, IL
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
17.4 days - Average rainfall days in June:
16.9 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
17 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
13.3 days - Average rainfall days in November:
8.2 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (4.9 days).
Average snowfall
Sleepy Hollow, IL
- Average snowfall in January:
3.62" - Average snowfall in February:
3.11" - Average snowfall in March:
1.22" - Average snowfall in April:
1.89" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Sleepy Hollow, IL
- Average snowfall days in January:
12.9 days - Average snowfall days in February:
11 days - Average snowfall days in March:
6.8 days - Average snowfall days in April:
2.1 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:
3.5 days - Average snowfall days in December:
10.5 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Sleepy Hollow, 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:
5h and 5min - Average sunshine in April:
7h and 2min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Sleepy Hollow, IL
- Average sunshine days in January:
14.2 days - Average sunshine days in February:
12 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
10.7 days - Average sunshine days in May:
10.5 days - Average sunshine days in June:
10.1 days
- Average sunshine days in July:
10.2 days - Average sunshine days in August:
10.3 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
14.6 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.1 days).
Average UV index
Sleepy Hollow, 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
Sleepy Hollow, 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 33).
Average visibility
Sleepy Hollow, IL
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Sleepy Hollow, Illinois, USA
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