Expand
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 Forest Park, Illinois, is a freezing cold winter month, with an average temperature ranging between min 19.4°F (-7°C) and max 28.9°F (-1.7°C). Forest Park witnesses the coldest weather in January, with temperatures averaging a high of 28.9°F (-1.7°C) and a low of 19.4°F (-7°C). Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Forest Park, Illinois, with an average temperature varying between 21.9°F (-5.6°C) and 32.4°F (0.2°C). At the start of February, Forest Park's average high-temperature reaches an icy 32.4°F (0.2°C), subtly different from the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Forest Park, Illinois, with an average temperature ranging between min 32.2°F (0.1°C) and max 43.2°F (6.2°C). Noticing a change, the average high-temperature during March moves from February's cold 32.4°F (0.2°C) to a frosty 43.2°F (6.2°C). Weather in March »
Weather in April
April is a fresh spring month in Forest Park, Illinois, with temperature in the range of an average high of 53.2°F (11.8°C) and an average low of 40.5°F (4.7°C). As April sets, the average high-temperature shows an increase, moving up from a chilly 43.2°F (6.2°C) in March to a fresh 53.2°F (11.8°C). Weather in April »
Weather in May
May, the last month of the spring in Forest Park, is a refreshing month, with an average temperature fluctuating between 51.4°F (10.8°C) and 64.4°F (18°C). The arrival of May brings a change in Forest Park's weather, with average high-temperatures moving from April's fresh 53.2°F (11.8°C) to a comfortable 64.4°F (18°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Forest Park, Illinois, with an average temperature fluctuating between 61.2°F (16.2°C) and 73.9°F (23.3°C). An upsurge in temperatures occurs as May gives way to June, with average highs shifting from a refreshing 64.4°F (18°C) to a warm 73.9°F (23.3°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Forest Park, Illinois, with temperature in the range of an average low of 67.5°F (19.7°C) and an average high of 79.7°F (26.5°C). The warmest time of the year is July, with temperatures averaging a high of 79.7°F (26.5°C) and a low of 67.5°F (19.7°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Forest Park, Illinois, with an average temperature varying between 66.7°F (19.3°C) and 79.3°F (26.3°C). The onset of August manifests an average high-temperature of a still moderately hot 79.3°F (26.3°C), demonstrating a minor variation from the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Forest Park, Illinois, with an average temperature fluctuating between 72.1°F (22.3°C) and 60.4°F (15.8°C). The transition into September involves a small decrease in the average high-temperature, dipping slightly from a warm 79.3°F (26.3°C) in August to a pleasant 72.1°F (22.3°C). Weather in September »
Weather in October
October, the same as September, in Forest Park, Illinois, is another refreshing autumn month, with temperature in the range of an average low of 47.8°F (8.8°C) and an average high of 59.9°F (15.5°C). As October begins, there is a decrease in the average high-temperature, falling from a pleasant 72.1°F (22.3°C) in September to a moderate 59.9°F (15.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Forest Park, Illinois, with an average temperature ranging between max 45.9°F (7.7°C) and min 35.4°F (1.9°C). Forest Park, Illinois, in November undergoes a mild reduction in the average high-temperature, shifting from October's mild 59.9°F (15.5°C) to a frosty 45.9°F (7.7°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Forest Park, Illinois, with an average temperature fluctuating between 26.6°F (-3°C) and 35.1°F (1.7°C). As November transitions into December, Forest Park sees a drop in the average high-temperature, transitioning from a chilly 45.9°F (7.7°C) to an icy 35.1°F (1.7°C). Weather in December »
Updated: Jul 28, 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 28.9°F (-1.7°C) and an average low temperature of 19.4°F (-7°C), is the coldest month.
What is the most humid month?
The most humid month is January, with an average relative humidity of 82%.
How many days does it rain?
Throughout the year, there are 157.8 rainfall days, and 33.7" (856mm) of precipitation is accumulated.
When does it snow?
January through May, October through December are months with snowfall in Forest Park.
How much does it snow in Forest Park?
In Forest Park, during the entire year, snow falls for 40.3 days and aggregates up to 16.81" (427mm) 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.
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 10.2 days and accumulates 4.69" (119mm) 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 wettest month?
May is the month with the most rainfall. Rain falls for 18.8 days and accumulates 4.49" (114mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What month is the hottest?
July tends to be the warmest month, with temperatures averaging a daily high of 79.7°F (26.5°C) and a low of 67.5°F (19.7°C).
What month has the most sunshine?
The month with the most sunshine is August, with an average of 10.6h of sunshine.
What is the least humid month in Forest Park?
October is the least humid month, with an average relative humidity of 72%.
What is the driest month?
December is the month with the least rainfall. Rain falls for 8.2 days and accumulates 1.57" (40mm) 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
Forest Park, IL
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.9°F).
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure
Forest 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:
30.09"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
Forest Park, IL
- Average wind speed in January:
11.1mph - Average wind speed in February:
10.7mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.7mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7mph - Average wind speed in August:
7mph - Average wind speed in September:
8.3mph - Average wind speed in October:
10.1mph - Average wind speed in November:
10.7mph - Average wind speed in December:
10.4mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity
Forest Park, IL
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Forest Park, IL
- Average rainfall in January:
1.69" - Average rainfall in February:
1.73" - Average rainfall in March:
2.01" - Average rainfall in April:
3.62" - Average rainfall in May:
4.49" - Average rainfall in June:
4.29"
- Average rainfall in July:
3.74" - Average rainfall in August:
3.5" - Average rainfall in September:
2.72" - Average rainfall in October:
2.68" - Average rainfall in November:
1.65" - Average rainfall in December:
1.57"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.57").
Average rainfall days
Forest Park, IL
- Average rainfall days in January:
6.5 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
18.8 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
18.5 days - Average rainfall days in August:
16.4 days - Average rainfall days in September:
14.5 days - Average rainfall days in October:
13.6 days - Average rainfall days in November:
9.7 days - Average rainfall days in December:
8.2 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (5.1 days).
Average snowfall
Forest Park, IL
- Average snowfall in January:
4.21" - Average snowfall in February:
4.69" - Average snowfall in March:
1.26" - Average snowfall in April:
1.97" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Forest Park, IL
- Average snowfall days in January:
10.8 days - Average snowfall days in February:
10.2 days - Average snowfall days in March:
5.8 days - Average snowfall days in April:
1.8 days - Average snowfall days in May:
0.1 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:
0.2 days - Average snowfall days in November:
3.1 days - Average snowfall days in December:
8.3 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Forest 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 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 4min - Average sunshine in September:
9h and 0min - 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 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Forest Park, IL
- Average sunshine days in January:
14.3 days - Average sunshine days in February:
12.9 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
10.2 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
9.9 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
13.4 days - Average sunshine days in October:
15.1 days - Average sunshine days in November:
16.3 days - Average sunshine days in December:
16.7 days
The month with the most sunshine days is December (16.7 days).
The month with the least sunshine days is July (9.9 days).
Average UV index
Forest Park, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Forest Park, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
Forest 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).
Forest Park, Illinois, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location