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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, like December, is another subzero cold winter month in Merrionette Park, Illinois, with temperature in the range of an average high of 29.5°F (-1.4°C) and an average low of 18.9°F (-7.3°C). Merrionette Park's coldest month, January, registers temperatures that range from a high of 29.5°F (-1.4°C) to a low of 18.9°F (-7.3°C). Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Merrionette Park, Illinois, with an average temperature varying between 21.6°F (-5.8°C) and 32.5°F (0.3°C). The average high-temperature in February, at an icy 32.5°F (0.3°C), reveals a modest deviation from January's 29.5°F (-1.4°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Merrionette Park, Illinois, with temperature in the range of an average high of 44.2°F (6.8°C) and an average low of 32.4°F (0.2°C). As Merrionette Park transitions into March, the average high-temperature shows a change, moving from an icy 32.5°F (0.3°C) in February to a frosty 44.2°F (6.8°C). Weather in March »
Weather in April
April in Merrionette Park, Illinois, is a fresh spring month, with temperature in the range of an average high of 55.2°F (12.9°C) and an average low of 41.2°F (5.1°C). With the onset of April, Merrionette Park sees a temperature rise, with the average high-temperature moving from March's chilly 44.2°F (6.8°C) to a cool 55.2°F (12.9°C). Weather in April »
Weather in May
May, the last month of the spring in Merrionette Park, is a comfortable month, with an average temperature varying between 51.8°F (11°C) and 66.4°F (19.1°C). In Merrionette Park, the onset of May comes with an increased average high-temperature, moving from April's cool 55.2°F (12.9°C) to a comfortable 66.4°F (19.1°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Merrionette Park, Illinois, with an average temperature varying between 76.3°F (24.6°C) and 61.5°F (16.4°C). June indicates a change in the average high-temperature, moving up from an enjoyable 66.4°F (19.1°C) in May to a moderately hot 76.3°F (24.6°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Merrionette Park, Illinois, with an average temperature varying between 81°F (27.2°C) and 66.6°F (19.2°C). July is the warmest month of the year, registering average temperatures as high as 81°F (27.2°C) and as low as 66.6°F (19.2°C). During July, the heat index is computed to be a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Merrionette Park, is also a moderately hot month, with an average temperature varying between 65.8°F (18.8°C) and 79.9°F (26.6°C). August brings a marginal elevation to a still moderately hot 79.9°F (26.6°C) from July's 81°F (27.2°C) in Merrionette Park's average high-temperatures. Weather in August »
Weather in September
September, the first month of the autumn in Merrionette Park, is still a warm month, with an average temperature fluctuating between 59.2°F (15.1°C) and 73.6°F (23.1°C). September is characterized by a mild reduction in the average high-temperature, from 79.9°F (26.6°C) in August to a still warm 73.6°F (23.1°C). Weather in September »
Weather in October
October, the same as September, in Merrionette Park, Illinois, is a moderate autumn month, with an average temperature varying between 47.1°F (8.4°C) and 60.6°F (15.9°C). Merrionette Park's October weather features a mild decline in high-temperatures, reducing from a warm 73.6°F (23.1°C) in September to a moderate 60.6°F (15.9°C). Weather in October »
Weather in November
November, the last month of the autumn in Merrionette Park, is also a frosty month, with temperature in the range of an average high of 46.2°F (7.9°C) and an average low of 35.1°F (1.7°C). The drop of average high-temperatures is noticeable in November, with a decrease from a refreshing 60.6°F (15.9°C) in October to a chilly 46.2°F (7.9°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Merrionette Park, Illinois, with temperature in the range of an average low of 26.4°F (-3.1°C) and an average high of 35.2°F (1.8°C). December brings a decrease in the average high-temperature, falling from November's frosty 46.2°F (7.9°C) to a cold 35.2°F (1.8°C). Weather in December »
Updated: Jun 7, 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?
January, known for its average high temperature of 29.5°F (-1.4°C) and an average low temperature of 18.9°F (-7.3°C), is the coldest month.
What is the most humid month?
January and February, with an average relative humidity of 82%, are most humid months.
How many days does it rain?
Throughout the year, there are 147.7 rainfall days, and 23.62" (600mm) of precipitation is accumulated.
When does it snow in Merrionette Park?
January through April, October through December are months with snowfall.
How much does it snow?
In Merrionette Park, during the entire year, snow falls for 42.4 days and aggregates up to 11.61" (295mm) of snow.
What is the month with the least sunshine?
With an average of 3.7h of sunshine, January has the least sunshine of the year.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 9.5 days and accumulates 3.07" (78mm) of snow.
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 17.7 days and accumulates 3.07" (78mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 12min of daylight.
When is the highest UV index in Merrionette Park?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What time of the year is the hottest?
Merrionette Park witnesses the warmest weather in July, with temperatures averaging a high of 81°F (27.2°C) and a low of 66.6°F (19.2°C).
What month has the most sunshine?
With an average of 10.5h of sunshine, August has the most sunshine of the year.
What is the least humid month?
With an average relative humidity of 72%, October is the least humid month.
What is the driest month?
The month with the least rainfall is December, when the rain falls for 7.4 days and typically collects 1.02" (26mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
What is the month with the lowest UV index?
The month with the lowest UV index is December, with an average maximum UV index of 1.
Average temperature
Merrionette Park, IL
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.5°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Merrionette Park, 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:
30.01"Hg - Average pressure in November:
30.1"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
Merrionette Park, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.3mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.7mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.1mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity
Merrionette Park, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Merrionette Park, IL
- Average rainfall in January:
1.18" - Average rainfall in February:
1.18" - Average rainfall in March:
1.3" - Average rainfall in April:
2.32" - Average rainfall in May:
3.07" - Average rainfall in June:
2.95"
- Average rainfall in July:
2.8" - Average rainfall in August:
2.72" - Average rainfall in September:
1.97" - Average rainfall in October:
1.93" - Average rainfall in November:
1.18" - Average rainfall in December:
1.02"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (1.02").
Average rainfall days
Merrionette Park, IL
- Average rainfall days in January:
6.2 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
10.5 days - Average rainfall days in April:
15.1 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
18 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
12.8 days - Average rainfall days in November:
9.2 days - Average rainfall days in December:
7.4 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is February (4.9 days).
Average snowfall
Merrionette Park, IL
The month with the highest snowfall is February (3.07").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Merrionette Park, IL
- Average snowfall days in January:
11.8 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
6.1 days - Average snowfall days in April:
2.3 days - Average snowfall days in May:
0 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:
0.4 days - Average snowfall days in November:
2.9 days - Average snowfall days in December:
9.4 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Merrionette Park, IL
- Average daylight in January:
9h and 4min - 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 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 5min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 3min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Merrionette Park, IL
- Average sunshine days in January:
13.9 days - Average sunshine days in February:
13.1 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
10.7 days
- Average sunshine days in July:
9.8 days - Average sunshine days in August:
10 days - Average sunshine days in September:
13 days - Average sunshine days in October:
14.9 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
15.5 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is July (9.8 days).
Average UV index
Merrionette Park, 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
Merrionette Park, IL
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Merrionette Park, 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).
Merrionette Park, Illinois, USA
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