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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 Oak Forest, Illinois, is another subzero cold winter month, with an average temperature fluctuating between 29.7°F (-1.3°C) and 18.7°F (-7.4°C). January brings the lowest temperatures, with an average high of 29.7°F (-1.3°C) and an average low of 18.7°F (-7.4°C). Weather in January »
Weather in February
February, the last month of the winter in Oak Forest, is a wintry month, with an average temperature ranging between min 21°F (-6.1°C) and max 33.1°F (0.6°C). Transitioning from January to February, Oak Forest observes an average high-temperature of a wintry 33.1°F (0.6°C), differing subtly from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Oak Forest, is a frosty month, with an average temperature ranging between max 45.9°F (7.7°C) and min 32.4°F (0.2°C). With the arrival of March, the average high-temperature transitions from a cold 33.1°F (0.6°C) in February to a frosty 45.9°F (7.7°C). Weather in March »
Weather in April
April in Oak Forest, Illinois, is a mild spring month, with an average temperature varying between 57°F (13.9°C) and 41.7°F (5.4°C). The arrival of April signals an increase in the average high-temperature, moving from a frosty 45.9°F (7.7°C) in March to a refreshing 57°F (13.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Oak Forest, Illinois, with temperature in the range of an average low of 52.5°F (11.4°C) and an average high of 68.7°F (20.4°C). The arrival of May brings a temperature shift, with the average high-temperature escalating from a mild 57°F (13.9°C) in April to an agreeable 68.7°F (20.4°C). Weather in May »
Weather in June
June, the first month of the summer in Oak Forest, is a warm month, with an average temperature ranging between max 78.3°F (25.7°C) and min 61.5°F (16.4°C). June's arrival signals a temperature shift, moving from an agreeable 68.7°F (20.4°C) in May to a moderately hot 78.3°F (25.7°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Oak Forest, Illinois, with an average temperature fluctuating between 81.9°F (27.7°C) and 65.8°F (18.8°C). The warmest temperatures occur during July, when averages reach a peak of 81.9°F (27.7°C) and a low of 65.8°F (18.8°C). In July, the heat index is calculated to be a hot 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Oak Forest, is another warm month, with an average temperature ranging between min 64.2°F (17.9°C) and max 79.9°F (26.6°C). As Oak Forest welcomes August, the average high-temperature records at a still moderately hot 79.9°F (26.6°C), marking an insignificant deviation from the prior month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Oak Forest, Illinois, with an average temperature ranging between max 73.9°F (23.3°C) and min 57.9°F (14.4°C). The arrival of September corresponds with a light shift in temperature, down from 79.9°F (26.6°C) in August to a still moderately hot 73.9°F (23.3°C). Weather in September »
Weather in October
October, like September, in Oak Forest, Illinois, is another refreshing autumn month, with an average temperature ranging between max 61.2°F (16.2°C) and min 46.8°F (8.2°C). A decrease in the average high-temperature is observed during October, shifting from a warm 73.9°F (23.3°C) in September to a comfortable 61.2°F (16.2°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Oak Forest, Illinois, with temperature in the range of an average high of 46.9°F (8.3°C) and an average low of 34.5°F (1.4°C). The start of November comes with a reduction in the average high-temperature, receding from a refreshing 61.2°F (16.2°C) in October to a frosty 46.9°F (8.3°C). Weather in November »
Weather in December
December, the first month of the winter in Oak Forest, is still a cold month, with an average temperature ranging between min 25.7°F (-3.5°C) and max 35.4°F (1.9°C). December's arrival comes with a decrease in the average high-temperature, moving from a frosty 46.9°F (8.3°C) in November to a wintry 35.4°F (1.9°C). Weather in December »
Updated: Jul 19, 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?
Oak Forest's coldest temperatures are experienced in January, with average high temperatures of 29.7°F (-1.3°C) and lows of 18.7°F (-7.4°C).
What is the driest month?
January, February and December are months with the least rain when the rain falls for 4.5 days and typically aggregates up to 0.55" (14mm) of rain.
How many days does it rain?
In Oak Forest, during the entire year, the rain falls for 111.8 days and collects up to 11.18" (284mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 10.3 days and accumulates 1.3" (33mm) of snow.
How many days does it snow?
In Oak Forest, during the entire year, snow falls for 34.2 days and aggregates up to 4.8" (122mm) of snow.
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 are the months 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 most humid month?
The most humid month is February, with an average relative humidity of 83%.
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 in Oak Forest?
The month with the most rainfall is May, when the rain falls for 12.4 days and typically aggregates up to 1.54" (39mm) 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 highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What time of the year is the hottest?
July is the month when Oak Forest experiences its warmest temperatures, averaging a high of 81.9°F (27.7°C) and a low of 65.8°F (18.8°C).
What month has the most sunshine?
The month with the most sunshine is August, with an average of 10h of sunshine.
What is the least humid month?
The least humid month is October, with an average relative humidity of 73%.
What is the month with the shortest days in Oak Forest?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Oak Forest, IL
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (29.7°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure
Oak Forest, 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:
30.1"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
Oak Forest, IL
- Average wind speed in January:
10.1mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.7mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.2mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.4mph
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
Oak Forest, IL
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Oak Forest, IL
- Average rainfall in January:
0.55" - Average rainfall in February:
0.55" - Average rainfall in March:
0.59" - Average rainfall in April:
1.14" - Average rainfall in May:
1.54" - Average rainfall in June:
1.38"
- Average rainfall in July:
1.26" - Average rainfall in August:
1.06" - Average rainfall in September:
0.98" - Average rainfall in October:
0.98" - Average rainfall in November:
0.59" - Average rainfall in December:
0.55"
The wettest month (with the highest rainfall) is May (1.54").
The driest months (with the least rainfall) are January, February and December (0.55").
Average rainfall days
Oak Forest, IL
- Average rainfall days in January:
4.5 days - Average rainfall days in February:
4.1 days - Average rainfall days in March:
8.7 days - Average rainfall days in April:
12.6 days - Average rainfall days in May:
12.4 days - Average rainfall days in June:
13 days
- Average rainfall days in July:
14.1 days - Average rainfall days in August:
10.8 days - Average rainfall days in September:
10.4 days - Average rainfall days in October:
9 days - Average rainfall days in November:
7.4 days - Average rainfall days in December:
4.8 days
The month with the highest number of rainy days is July (14.1 days).
The month with the least rainy days is February (4.1 days).
Average snowfall
Oak Forest, IL
The month with the highest snowfall is January (1.3").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Oak Forest, IL
- Average snowfall days in January:
10.3 days - Average snowfall days in February:
8.7 days - Average snowfall days in March:
4 days - Average snowfall days in April:
1.3 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:
6.6 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Oak Forest, 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 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 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 5min - 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 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Oak Forest, IL
- Average sunshine days in January:
19 days - Average sunshine days in February:
17.2 days - Average sunshine days in March:
18.7 days - Average sunshine days in April:
15.1 days - Average sunshine days in May:
15 days - Average sunshine days in June:
13.1 days
- Average sunshine days in July:
13.3 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
17 days - Average sunshine days in October:
18.9 days - Average sunshine days in November:
20.7 days - Average sunshine days in December:
20.6 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is June (13.1 days).
Average UV index
Oak Forest, 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
Oak Forest, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Oak Forest, 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).
Oak Forest, Illinois, USA
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