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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 Millbrook, Illinois, is another subzero cold winter month, with an average temperature fluctuating between 28.2°F (-2.1°C) and 16.2°F (-8.8°C). With average temperatures fluctuating between a high of 28.2°F (-2.1°C) and a low of 16.2°F (-8.8°C), January stands out as the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Millbrook, is an icy month, with temperature in the range of an average high of 32.2°F (0.1°C) and an average low of 19.2°F (-7.1°C). Millbrook experiences a subtle adjustment in high-temperatures to an icy 32.2°F (0.1°C) with the onset of February, maintaining near parity with January's 28.2°F (-2.1°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Millbrook, Illinois, with an average temperature varying between 45.9°F (7.7°C) and 31.3°F (-0.4°C). In March, the meteorological conditions change with the average high-temperature moving from a wintry 32.2°F (0.1°C) in February to a frosty 45.9°F (7.7°C). Weather in March »
Weather in April
April in Millbrook, Illinois, is a refreshing spring month, with temperature in the range of an average low of 41.2°F (5.1°C) and an average high of 57.4°F (14.1°C). With the beginning of April, Millbrook's average high-temperature sees an increase, transitioning from a frosty 45.9°F (7.7°C) in March to a moderate 57.4°F (14.1°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Millbrook, Illinois, with an average temperature ranging between min 52.3°F (11.3°C) and max 69.6°F (20.9°C). May signals a shift in the average high-temperature, moving from April's refreshing 57.4°F (14.1°C) to a pleasant 69.6°F (20.9°C). Weather in May »
Weather in June
June, the first month of the summer in Millbrook, is a moderately hot month, with an average temperature ranging between min 60.8°F (16°C) and max 78.3°F (25.7°C). June marks a minor ascent in the average high-temperature, adjusting from May's agreeable 69.6°F (20.9°C) to a warm 78.3°F (25.7°C). Weather in June »
Weather in July
July, like June, in Millbrook, Illinois, is another warm summer month, with an average temperature varying between 80.6°F (27°C) and 63.5°F (17.5°C). In Millbrook, the average temperatures in July are the highest, with a peak at 80.6°F (27°C) and a low of 63.5°F (17.5°C). July's average heat index is calculated to be a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Millbrook, is also a moderately hot month, with an average temperature varying between 79.3°F (26.3°C) and 61.7°F (16.5°C). August's beginning signals an average high-temperature of a still warm 79.3°F (26.3°C), barely different from July's 80.6°F (27°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Millbrook, Illinois, with an average temperature varying between 73.8°F (23.2°C) and 55.6°F (13.1°C). During the shift to September, Millbrook records a mild decrease in average high-temperature, moving from a moderately hot 79.3°F (26.3°C) in August to a still warm 73.8°F (23.2°C). Weather in September »
Weather in October
October, the same as September, in Millbrook, Illinois, is another refreshing autumn month, with an average temperature varying between 45°F (7.2°C) and 60.6°F (15.9°C). The arrival of October indicates a decrease in the average high-temperature, moving from a moderately hot 73.8°F (23.2°C) in September to a refreshing 60.6°F (15.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Millbrook, Illinois, with temperature in the range of an average high of 45.9°F (7.7°C) and an average low of 32.9°F (0.5°C). As Millbrook welcomes November, the average high-temperature witnesses a distinct drop, moving from a mild 60.6°F (15.9°C) in October to a chilly 45.9°F (7.7°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Millbrook, Illinois, with temperature in the range of an average high of 34.2°F (1.2°C) and an average low of 23.9°F (-4.5°C). In Millbrook, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 45.9°F (7.7°C) to an icy 34.2°F (1.2°C). Weather in December »
Updated: Jul 21, 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 are the coldest months?
January is the month when Millbrook experiences its coldest temperatures, averaging a high of 28.2°F (-2.1°C) and a low of 16.2°F (-8.8°C).
How much does it rain?
In Millbrook, during the entire year, the rain falls for 168.3 days and collects up to 35.47" (901mm) of precipitation.
When does it snow?
Months with snowfall are January through April, October through December.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 13.4 days and typically aggregates up to 4.88" (124mm) of snow.
How much does it snow?
Throughout the year, in Millbrook, there are 47.1 snowfall days, and 16.61" (422mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 3.8h of sunshine.
What is the month with the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
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 wettest month?
The month with the most rainfall is May, when the rain falls for 19.4 days and typically aggregates up to 4.88" (124mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 6min of daylight.
What are the months with the most sunshine?
June and August, with an average of 9.6h of sunshine, are months with the most sunshine.
What is the month with the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What are the warmest months?
In Millbrook, July registers the highest temperatures, averaging 80.6°F (27°C) at the peak and 63.5°F (17.5°C) at the lowest.
What is the most humid month?
The months with the highest humidity are July and August, with an average relative humidity of 84%.
What is the least humid month?
The least humid month is October, with an average relative humidity of 74%.
What is the driest month?
The month with the least rainfall is November, when the rain falls for 11 days and typically collects 1.73" (44mm) 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.
Average temperature
Millbrook, 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 (28.2°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 (16.2°F).
Average pressure
Millbrook, IL
- Average pressure in January:
30.12"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:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Millbrook, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.7mph - 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:
6.2mph - Average wind speed in August:
6mph - Average wind speed in September:
7mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.3mph - Average wind speed in December:
9.1mph
The windiest months (with the highest average wind speed) are January and April (9.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity
Millbrook, IL
The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Millbrook, IL
- Average rainfall in January:
1.85" - Average rainfall in February:
1.85" - Average rainfall in March:
2.09" - Average rainfall in April:
4.02" - Average rainfall in May:
4.88" - Average rainfall in June:
4.65"
- Average rainfall in July:
3.9" - Average rainfall in August:
3.11" - Average rainfall in September:
2.52" - Average rainfall in October:
3.03" - Average rainfall in November:
1.73" - Average rainfall in December:
1.85"
The wettest month (with the highest rainfall) is May (4.88").
The driest month (with the least rainfall) is November (1.73").
Average rainfall days
Millbrook, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
6 days - Average rainfall days in March:
13.3 days - Average rainfall days in April:
17.9 days - Average rainfall days in May:
19.4 days - Average rainfall days in June:
19.8 days
- Average rainfall days in July:
20.3 days - Average rainfall days in August:
18.3 days - Average rainfall days in September:
14 days - Average rainfall days in October:
13.8 days - Average rainfall days in November:
11 days - Average rainfall days in December:
8.2 days
The month with the highest number of rainy days is July (20.3 days).
The month with the least rainy days is February (6 days).
Average snowfall
Millbrook, IL
The month with the highest snowfall is January (4.88").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Millbrook, IL
- Average snowfall days in January:
13.4 days - Average snowfall days in February:
11.2 days - Average snowfall days in March:
6.6 days - Average snowfall days in April:
1.8 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:
0.5 days - Average snowfall days in November:
3.2 days - Average snowfall days in December:
10.2 days
The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Millbrook, 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 3min - 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 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 3min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The months with the most sunshine are June and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Millbrook, IL
- Average sunshine days in January:
13.3 days - Average sunshine days in February:
11.8 days - Average sunshine days in March:
13.1 days - Average sunshine days in April:
9.4 days - Average sunshine days in May:
9.3 days - Average sunshine days in June:
8.4 days
- Average sunshine days in July:
7.2 days - Average sunshine days in August:
9.1 days - Average sunshine days in September:
13.4 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
16.3 days - Average sunshine days in December:
14.5 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is July (7.2 days).
Average UV index
Millbrook, IL
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Millbrook, IL
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility
Millbrook, IL
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Millbrook, Illinois, USA
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