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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 Deer Park, Illinois, with an average temperature fluctuating between 16.3°F (-8.7°C) and 27.7°F (-2.4°C). Deer Park's January weather, marked by an average high temperature of 27.7°F (-2.4°C) and an average low temperature of 16.3°F (-8.7°C), is the coldest in the year. Weather in January »
Weather in February
February, the last month of the winter in Deer Park, is also a subzero cold month, with an average temperature varying between 31.1°F (-0.5°C) and 18.9°F (-7.3°C). Deer Park's weather in February indicates an average high-temperature of a still freezing cold 31.1°F (-0.5°C), nearly consistent with the 27.7°F (-2.4°C) of January. Weather in February »
Weather in March
March, the first month of the spring in Deer Park, is a frosty month, with an average temperature ranging between max 43.5°F (6.4°C) and min 30.4°F (-0.9°C). The arrival of March signals an increase in the average high-temperature, moving from a freezing cold 31.1°F (-0.5°C) in February to a chilly 43.5°F (6.4°C). Weather in March »
Weather in April
April is a fresh spring month in Deer Park, Illinois, with temperature in the range of an average low of 39.2°F (4°C) and an average high of 54.3°F (12.4°C). Deer Park sees a rise in temperature during April, with average high-temperatures transitioning from a frosty 43.5°F (6.4°C) in March to a fresh 54.3°F (12.4°C). Weather in April »
Weather in May
The last month of the spring, May, is a comfortable month in Deer Park, Illinois, with an average temperature varying between 66.4°F (19.1°C) and 50.2°F (10.1°C). The arrival of May brings a temperature shift, with the average high-temperature escalating from a cool 54.3°F (12.4°C) in April to a refreshing 66.4°F (19.1°C). Weather in May »
Weather in June
June, the first month of the summer in Deer Park, is a moderately hot month, with an average temperature ranging between max 75.9°F (24.4°C) and min 59.7°F (15.4°C). June sees a temperature increase, moving from a refreshing 66.4°F (19.1°C) in May to a warm 75.9°F (24.4°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Deer Park, Illinois, with temperature in the range of an average low of 64.9°F (18.3°C) and an average high of 80.6°F (27°C). In Deer Park, the peak average temperatures are observed in July, with a high of 80.6°F (27°C) and a low of 64.9°F (18.3°C). The heat index value for July is calculated to be a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Deer Park, is also a moderately hot month, with an average temperature fluctuating between 63.5°F (17.5°C) and 79.3°F (26.3°C). August brings a marginal elevation to a still moderately hot 79.3°F (26.3°C) from July's 80.6°F (27°C) in Deer Park's average high-temperatures. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Deer Park, Illinois, with an average temperature varying between 72.9°F (22.7°C) and 57.2°F (14°C). The move into September indicates a slight reduction in the average high-temperature, down from August's warm 79.3°F (26.3°C) to a pleasant 72.9°F (22.7°C). Weather in September »
Weather in October
October, the same as September, in Deer Park, Illinois, is another refreshing autumn month, with temperature in the range of an average high of 59.5°F (15.3°C) and an average low of 45.3°F (7.4°C). The average high-temperature decreases in October, shifting from a pleasant 72.9°F (22.7°C) in September to a moderate 59.5°F (15.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Deer Park, is another chilly month, with temperature in the range of an average high of 45.1°F (7.3°C) and an average low of 33.1°F (0.6°C). The shift from October to November brings a noticeable decrease in the average high-temperature, dropping from a mild 59.5°F (15.3°C) to a frosty 45.1°F (7.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Deer Park, Illinois, with an average temperature fluctuating between 23.9°F (-4.5°C) and 33.4°F (0.8°C). Stepping into December, Deer Park observes a temperature decline, with the average high falling from November's frosty 45.1°F (7.3°C) to an icy 33.4°F (0.8°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
What is the coldest month?
The coldest period is January, when temperatures fluctuate between an average high of 27.7°F (-2.4°C) and a low of 16.3°F (-8.7°C).
What are the most humid months?
January and February, with an average relative humidity of 83%, are most humid months.
How much does it rain?
Throughout the year, there are 163.1 rainfall days, and 32.24" (819mm) of precipitation is accumulated.
When does it snow?
January through May, October through December are months with snowfall.
How much does it snow?
Throughout the year, there are 55.5 snowfall days, and 22.95" (583mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 3.7h 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.
What is the snowiest month?
February is the month with the most snowfall. Snow falls for 12.8 days and accumulates 6.22" (158mm) 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?
The month with the most rainfall is June, when the rain falls for 18.8 days and typically aggregates up to 4.13" (105mm) of precipitation.
When it does not snow?
In Deer Park, snow does not fall in June through September.
When are the longest days?
June has the longest days of the year in Deer Park, with an average of 15h and 12min of daylight.
What month is the hottest?
July brings the highest temperatures, with an average high of 80.6°F (27°C) and an average low of 64.9°F (18.3°C).
What are the months with the most sunshine?
The months with the most sunshine are July and August, with an average of 10.1h of sunshine.
What is the month with the highest UV index?
The months with the highest UV index in Deer Park are July and August, with an average maximum UV index of 6.
What is the least humid month?
With an average relative humidity of 74%, October is the least humid month in Deer Park.
What is the driest month?
The month with the least rainfall is November, when the rain falls for 9.4 days and typically collects 1.61" (41mm) 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.
Average temperature
Deer Park, 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 (27.7°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 (16.3°F).
Average pressure
Deer 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"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
Deer Park, IL
- Average wind speed in January:
10.1mph - Average wind speed in February:
9.9mph - 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:
7.2mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.3mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.3mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Deer Park, 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
Deer Park, IL
- Average rainfall in January:
1.77" - Average rainfall in February:
1.85" - Average rainfall in March:
2.01" - Average rainfall in April:
3.86" - Average rainfall in May:
4.06" - Average rainfall in June:
4.13"
- Average rainfall in July:
3.27" - Average rainfall in August:
3.11" - Average rainfall in September:
2.2" - Average rainfall in October:
2.72" - Average rainfall in November:
1.61" - Average rainfall in December:
1.65"
The wettest month (with the highest rainfall) is June (4.13").
The driest month (with the least rainfall) is November (1.61").
Average rainfall days
Deer Park, IL
- Average rainfall days in January:
6.7 days - Average rainfall days in February:
5.7 days - Average rainfall days in March:
13 days - Average rainfall days in April:
17.2 days - Average rainfall days in May:
20 days - Average rainfall days in June:
18.8 days
- Average rainfall days in July:
18.6 days - Average rainfall days in August:
16.9 days - Average rainfall days in September:
13.4 days - Average rainfall days in October:
14.6 days - Average rainfall days in November:
9.4 days - Average rainfall days in December:
8.8 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (5.7 days).
Average snowfall
Deer Park, IL
- Average snowfall in January:
6.14" - Average snowfall in February:
6.22" - Average snowfall in March:
2.17" - Average snowfall in April:
2.56" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is February (6.22").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Deer Park, IL
- Average snowfall days in January:
15.5 days - Average snowfall days in February:
12.8 days - Average snowfall days in March:
7.8 days - Average snowfall days in April:
2.3 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:
4.7 days - Average snowfall days in December:
11.7 days
The month with the highest number of snowfall days is January (15.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Deer Park, 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 1min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 1min - 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
Deer Park, IL
- Average sunshine days in January:
12.2 days - Average sunshine days in February:
10.5 days - Average sunshine days in March:
12.5 days - Average sunshine days in April:
9 days - Average sunshine days in May:
8.5 days - Average sunshine days in June:
8.4 days
- Average sunshine days in July:
9.3 days - Average sunshine days in August:
11.2 days - Average sunshine days in September:
13.4 days - Average sunshine days in October:
13.7 days - Average sunshine days in November:
15.5 days - Average sunshine days in December:
13.9 days
The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is June (8.4 days).
Average UV index
Deer Park, 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
Deer Park, IL
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 31).
Average visibility
Deer Park, 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).
Deer Park, Illinois, USA
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