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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, is a wintry winter month in River Forest, Indiana, with an average temperature ranging between max 32.2°F (0.1°C) and min 20.5°F (-6.4°C). January, recording an average high temperature of 32.2°F (0.1°C) and a low temperature of 20.5°F (-6.4°C), is River Forest's coldest month. Weather in January »
Weather in February
February, the last month of the winter in River Forest, is another cold month, with an average temperature varying between 23.7°F (-4.6°C) and 36.9°F (2.7°C). February's presence records an average high-temperature of a still wintry 36.9°F (2.7°C), closely mirroring January's climate. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in River Forest, Indiana, with an average temperature fluctuating between 33.8°F (1°C) and 48.6°F (9.2°C). The arrival of March brings an increase in high-temperatures, moving from an icy 36.9°F (2.7°C) in February to a frosty 48.6°F (9.2°C). Weather in March »
Weather in April
April in River Forest, Indiana, is a refreshing spring month, with an average temperature ranging between min 44.1°F (6.7°C) and max 60.4°F (15.8°C). Entering April, River Forest sees a temperature rise, with the average high-temperature advancing from March's chilly 48.6°F (9.2°C) to a mild 60.4°F (15.8°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in River Forest, Indiana, with an average temperature varying between 71.4°F (21.9°C) and 55°F (12.8°C). The start of May brings a rise in the average high-temperature, moving from a refreshing 60.4°F (15.8°C) in April to a pleasant 71.4°F (21.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in River Forest, Indiana, with an average temperature ranging between min 62.2°F (16.8°C) and max 79.3°F (26.3°C). The coming of June brings a minor shift in River Forest's weather, with average high-temperatures adjusting from May's pleasant 71.4°F (21.9°C) to a moderately hot 79.3°F (26.3°C). Weather in June »
Weather in July
July, like June, in River Forest, Indiana, is a moderately hot summer month, with temperature in the range of an average high of 81.3°F (27.4°C) and an average low of 64.8°F (18.2°C). In River Forest, the average temperatures in July are the highest, with a peak at 81.3°F (27.4°C) and a low of 64.8°F (18.2°C). The heat index value during July is appraised at a hot 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in River Forest, Indiana, with an average temperature ranging between max 80.1°F (26.7°C) and min 62.4°F (16.9°C). The arrival of August brings an average high-temperature of a still moderately hot 80.1°F (26.7°C), nearly identical to July's 81.3°F (27.4°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in River Forest, Indiana, with an average temperature ranging between min 57.4°F (14.1°C) and max 74.5°F (23.6°C). As September commences, the average high-temperature subtly reduces, transitioning from 80.1°F (26.7°C) in August to a still moderately hot 74.5°F (23.6°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in River Forest, Indiana, with an average temperature ranging between max 62.2°F (16.8°C) and min 46.6°F (8.1°C). With October's arrival, River Forest sees a decrease in average high-temperatures, moving from a moderately hot 74.5°F (23.6°C) in September to an enjoyable 62.2°F (16.8°C). Weather in October »
Weather in November
November, the last month of the autumn in River Forest, is another chilly month, with temperature in the range of an average high of 48.6°F (9.2°C) and an average low of 35.4°F (1.9°C). The start of November signals a decrease in the average high-temperature, transitioning from a comfortable 62.2°F (16.8°C) in October to a frosty 48.6°F (9.2°C). Weather in November »
Weather in December
December, the first month of the winter in River Forest, is also an icy month, with temperature in the range of an average high of 38.1°F (3.4°C) and an average low of 27.5°F (-2.5°C). With December's onset, the average high-temperature recedes from November's frosty 48.6°F (9.2°C) to an icy 38.1°F (3.4°C). Weather in December »
Updated: Jul 30, 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 stands out as River Forest's coldest month, with an average high-temperature of 32.2°F (0.1°C) and a low-temperature of 20.5°F (-6.4°C).
What is the most humid month?
January and December, with an average relative humidity of 83%, are most humid months.
How many days does it rain?
In River Forest, during the entire year, the rain falls for 142.1 days and collects up to 20.91" (531mm) of precipitation.
When does it snow?
Months with snowfall are January through April, October through December.
How much does it snow?
In River Forest, during the entire year, snow falls for 34.7 days and aggregates up to 8.74" (222mm) 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.
When is the lowest UV index?
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2.
What is the driest month?
The months with the least rainfall are February and November Rain falls for 6.1 days and accumulates 1.14" (29mm) of rain.
When does it snow the most?
The months with the most snowfall are February and December, with an average 2.17" (55mm) of accumulated 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 EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the wettest month?
The month with the most rainfall is May, when the rain falls for 17.6 days and typically aggregates up to 2.68" (68mm) 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 0min of daylight.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10.2h of sunshine.
What are the months with the highest UV index in River Forest?
June through August, with an average maximum UV index of 6, are months with the highest UV index in River Forest.
What is the hottest time of year?
With average high temperatures of 81.3°F (27.4°C) and lows of 64.8°F (18.2°C), July is the warmest month.
What is the least humid month?
The least humid month in River Forest is October, with an average relative humidity of 74%.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
River Forest, IN
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.2°F).
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure
River Forest, IN
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.93"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:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
River Forest, IN
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.8mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.2mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6mph - Average wind speed in August:
5.9mph - Average wind speed in September:
6.7mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.3mph - Average wind speed in December:
9.5mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity
River Forest, IN
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall
River Forest, IN
- Average rainfall in January:
1.26" - Average rainfall in February:
1.14" - Average rainfall in March:
1.93" - Average rainfall in April:
2.2" - Average rainfall in May:
2.68" - Average rainfall in June:
2.48"
- Average rainfall in July:
1.97" - Average rainfall in August:
1.97" - Average rainfall in September:
1.38" - Average rainfall in October:
1.3" - Average rainfall in November:
1.14" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is May (2.68").
The driest months (with the least rainfall) are February and November (1.14").
Average rainfall days
River Forest, IN
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
17.6 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
14.6 days - Average rainfall days in September:
12.4 days - Average rainfall days in October:
11 days - Average rainfall days in November:
8.1 days - Average rainfall days in December:
8.3 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall
River Forest, IN
The months with the highest snowfall are February and December (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
River Forest, IN
- Average snowfall days in January:
10.4 days - Average snowfall days in February:
7.7 days - Average snowfall days in March:
4.3 days - Average snowfall days in April:
1 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:
2.9 days - Average snowfall days in December:
7.7 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
River Forest, IN
- 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 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 0min - Average sunshine in May:
8h and 4min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
9h and 3min - Average sunshine in September:
8h and 1min - Average sunshine in October:
6h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
River Forest, IN
- Average sunshine days in January:
15.7 days - Average sunshine days in February:
15.1 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
10.7 days - Average sunshine days in June:
11.4 days
- Average sunshine days in July:
12 days - Average sunshine days in August:
13.2 days - Average sunshine days in September:
15 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
15.9 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index
River Forest, IN
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover
River Forest, IN
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are June, July and August (Cloud cover 32).
Average visibility
River Forest, IN
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
River Forest, Indiana, USA
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