Climate and monthly weather forecastVernon Hills, IL
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Vernon Hills, Illinois, with an average temperature fluctuating between 16.5°F (-8.6°C) and 27.9°F (-2.3°C). January, with average temperatures reaching a high of 27.9°F (-2.3°C) and a low of 16.5°F (-8.6°C), is the coldest month. Weather in January »Weather in February
The last month of the winter, February, is also a subzero cold month in Vernon Hills, Illinois, with temperature in the range of an average high of 31.3°F (-0.4°C) and an average low of 19.2°F (-7.1°C). The average high-temperature is a still subzero cold 31.3°F (-0.4°C) in February, hardly different from the 27.9°F (-2.3°C) recorded in January. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Vernon Hills, Illinois, with an average temperature varying between 30.4°F (-0.9°C) and 43.2°F (6.2°C). Vernon Hills sees an increase in average high-temperatures during March, moving from a subzero cold 31.3°F (-0.4°C) in February to a chilly 43.2°F (6.2°C). Weather in March »Weather in April
April in Vernon Hills, Illinois, is a fresh spring month, with an average temperature fluctuating between 39°F (3.9°C) and 54.1°F (12.3°C). April brings a rise in the average high-temperature, transitioning from March's chilly 43.2°F (6.2°C) to a fresh 54.1°F (12.3°C). Weather in April »Weather in May
May, the last month of the spring in Vernon Hills, is a comfortable month, with an average temperature varying between 50°F (10°C) and 65.8°F (18.8°C). The shift into May is characterized by a rise in the average high-temperature, transitioning from April's fresh 54.1°F (12.3°C) to a comfortable 65.8°F (18.8°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Vernon Hills, Illinois, with an average temperature ranging between min 59°F (15°C) and max 75.6°F (24.2°C). June's arrival sees a rise in the average high-temperature, jumping from May's enjoyable 65.8°F (18.8°C) to a warm 75.6°F (24.2°C). Weather in June »Weather in July
July, like June, in Vernon Hills, Illinois, is another warm summer month, with an average temperature ranging between min 64.9°F (18.3°C) and max 80.4°F (26.9°C). Vernon Hills records the warmest temperatures in July, averaging a high of 80.4°F (26.9°C) and a low of 64.9°F (18.3°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Vernon Hills, Illinois, with an average temperature ranging between min 63.7°F (17.6°C) and max 79.3°F (26.3°C). Vernon Hills's average high-temperature in August is a still warm 79.3°F (26.3°C), marking an insignificant difference from the 80.4°F (26.9°C) of July. Weather in August »Weather in September
September, the first month of the autumn in Vernon Hills, is still a pleasant month, with temperature in the range of an average high of 72.9°F (22.7°C) and an average low of 57.4°F (14.1°C). The start of September involves a subtle temperature drop, shifting from a warm 79.3°F (26.3°C) in August to an agreeable 72.9°F (22.7°C). Weather in September »Weather in October
October, like September, is another refreshing autumn month in Vernon Hills, Illinois, with an average temperature varying between 45.5°F (7.5°C) and 59.2°F (15.1°C). As October commences, the average high-temperature shows a reduction, transitioning from an agreeable 72.9°F (22.7°C) in September to a refreshing 59.2°F (15.1°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Vernon Hills, Illinois, with an average temperature fluctuating between 45.3°F (7.4°C) and 33.3°F (0.7°C). Onset of November witnesses a reduction in the average high-temperature, falling from a mild 59.2°F (15.1°C) in October to a frosty 45.3°F (7.4°C). Weather in November »Weather in December
December, the first month of the winter in Vernon Hills, is still a cold month, with an average temperature ranging between min 24.3°F (-4.3°C) and max 33.6°F (0.9°C). The transition into December involves a decrease in the average high-temperature, falling from a frosty 45.3°F (7.4°C) in November to a wintry 33.6°F (0.9°C). Weather in December »Updated: Jul 23, 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
Vernon Hills's coldest weather arrives in January, when temperatures average a high of 27.9°F (-2.3°C) and a low of 16.5°F (-8.6°C).
January and February, with an average relative humidity of 83%, are most humid months.
In Vernon Hills, during the entire year, the rain falls for 147.3 days and collects up to 27.44" (697mm) of precipitation.
January through May, October through December are months with snowfall.
Throughout the year, there are 48.2 snowfall days, and 18.86" (479mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 3.7h of sunshine.
February is the month with the most snowfall. Snow falls for 11 days and accumulates 5.55" (141mm) of snow.
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.
The month with the most rainfall in Vernon Hills is June, when the rain falls for 17.2 days and typically aggregates up to 3.54" (90mm) of precipitation.
June through September are months without snowfall.
With an average of 15h and 12min of daylight, June has the longest days of the year.
Vernon Hills's temperatures peak on average in July, reaching 80.4°F (26.9°C) at their highest and 64.9°F (18.3°C) at their lowest.
The months with the most sunshine are July and August, with an average of 10.1h of sunshine.
July and August, with an average maximum UV index of 6, are months with the highest UV index.
October is the least humid month, with an average relative humidity of 74%.
The months with the least rainfall are November and December Rain falls for 7.8 days and accumulates 1.3" (33mm) of rain.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
The month with the lowest UV index is December, with an average maximum UV index of 1.
Average temperature
Vernon Hills, IL
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (27.9°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure
Vernon Hills, IL
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.09"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 (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Vernon Hills, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.1mph - 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:
7.3mph
- 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:
9mph - Average wind speed in November:
9.7mph - Average wind speed in December:
9.5mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Vernon Hills, 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
Vernon Hills, IL
- Average rainfall in January:
1.34" - Average rainfall in February:
1.61" - Average rainfall in March:
1.65" - Average rainfall in April:
3.19" - Average rainfall in May:
3.31" - Average rainfall in June:
3.54"
The wettest month (with the highest rainfall) is June (3.54").
The driest months (with the least rainfall) are November and December (1.3").
Average rainfall days
Vernon Hills, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
10.5 days - Average rainfall days in April:
16.2 days - Average rainfall days in May:
17.8 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
17.2 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
12.9 days - Average rainfall days in October:
13.5 days - Average rainfall days in November:
7.8 days - Average rainfall days in December:
7.8 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (4.3 days).
Average snowfall
Vernon Hills, IL
- Average snowfall in January:
4.65" - Average snowfall in February:
5.55" - Average snowfall in March:
1.34" - Average snowfall in April:
2.28" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.55").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Vernon Hills, IL
- Average snowfall days in January:
12.9 days - Average snowfall days in February:
11 days - Average snowfall days in March:
6.4 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:
0.6 days - Average snowfall days in November:
4.2 days - Average snowfall days in December:
10.4 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
Vernon Hills, IL
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
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 42min - Average sunshine in February:
3h and 48min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
10h and 6min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 0min - Average sunshine in December:
4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Vernon Hills, IL
- Average sunshine days in January:
13 days - Average sunshine days in February:
12.2 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
10.9 days - Average sunshine days in May:
10.5 days - Average sunshine days in June:
10 days
- Average sunshine days in July:
10.9 days - Average sunshine days in August:
12.7 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
14.4 days - Average sunshine days in November:
16.6 days - Average sunshine days in December:
14.5 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is June (10 days).
Average UV index
Vernon Hills, IL
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Vernon Hills, IL
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility
Vernon Hills, 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).
