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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 Riverwoods, Illinois, is another subzero cold winter month, with an average temperature ranging between max 28.6°F (-1.9°C) and min 18.3°F (-7.6°C). Riverwoods's coldest month, January, registers temperatures that range from a high of 28.6°F (-1.9°C) to a low of 18.3°F (-7.6°C). Weather in January »
Weather in February
February, the last month of the winter in Riverwoods, is another freezing cold month, with an average temperature fluctuating between 31.6°F (-0.2°C) and 20.7°F (-6.3°C). The transition into February marks the average high-temperature at a still subzero cold 31.6°F (-0.2°C), differing minimally from January's 28.6°F (-1.9°C). Weather in February »
Weather in March
The first month of the spring, March, is a wintry month in Riverwoods, Illinois, with an average temperature ranging between max 42.6°F (5.9°C) and min 31.3°F (-0.4°C). Riverwoods sees a rise in temperature during March, with average high-temperatures transitioning from a freezing cold 31.6°F (-0.2°C) in February to a cold 42.6°F (5.9°C). Weather in March »
Weather in April
April in Riverwoods, Illinois, is a cool spring month, with an average temperature fluctuating between 52.9°F (11.6°C) and 39.7°F (4.3°C). With the onset of April, Riverwoods sees a temperature rise, with the average high-temperature moving from March's icy 42.6°F (5.9°C) to a fresh 52.9°F (11.6°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in Riverwoods, Illinois, with an average temperature varying between 50.4°F (10.2°C) and 64.2°F (17.9°C). As Riverwoods welcomes May, the average high-temperature sees a rise, transitioning from a cool 52.9°F (11.6°C) in April to a refreshing 64.2°F (17.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Riverwoods, Illinois, with an average temperature ranging between max 74.1°F (23.4°C) and min 59.9°F (15.5°C). June's onset brings a temperature rise, moving from a refreshing 64.2°F (17.9°C) in May to a moderately hot 74.1°F (23.4°C). Weather in June »
Weather in July
July, like June, in Riverwoods, Illinois, is a moderately hot summer month, with an average temperature varying between 66.6°F (19.2°C) and 80.2°F (26.8°C). In Riverwoods, temperatures reach their average annual highs in July, measuring 80.2°F (26.8°C) and a minimum average of 66.6°F (19.2°C). Weather in July »
Weather in August
August, the last month of the summer in Riverwoods, is another warm month, with an average temperature fluctuating between 79.3°F (26.3°C) and 65.7°F (18.7°C). The weather during August records an average high-temperature of a still warm 79.3°F (26.3°C), closely mirroring the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Riverwoods, is also an agreeable month, with an average temperature ranging between min 59°F (15°C) and max 72.5°F (22.5°C). September's arrival subtly correlates with a reduction in the average high-temperature, down from a moderately hot 79.3°F (26.3°C) in August to a pleasant 72.5°F (22.5°C). Weather in September »
Weather in October
October, the same as September, in Riverwoods, Illinois, is a moderate autumn month, with an average temperature fluctuating between 47.1°F (8.4°C) and 59.5°F (15.3°C). A shift in Riverwoods's weather is observed as September turns into October, with the average high temperature reducing from a pleasant 72.5°F (22.5°C) to a refreshing 59.5°F (15.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Riverwoods, Illinois, with an average temperature varying between 45.3°F (7.4°C) and 34.7°F (1.5°C). Riverwoods's weather changes with the onset of November, slightly falling from a moderate 59.5°F (15.3°C) in October to a chilly 45.3°F (7.4°C). Weather in November »
Weather in December
December, the first month of the winter in Riverwoods, is still a cold month, with an average temperature fluctuating between 25.5°F (-3.6°C) and 34.5°F (1.4°C). The start of December comes with a reduction in the average high-temperature, receding from a frosty 45.3°F (7.4°C) in November to a cold 34.5°F (1.4°C). Weather in December »
Updated: Feb 12, 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 in Riverwoods?
The coldest period is January, when temperatures fluctuate between an average high of 28.6°F (-1.9°C) and a low of 18.3°F (-7.6°C).
What are the most humid months in Riverwoods?
The months with the highest humidity are January and February, with an average relative humidity of 82%.
How much does it rain in Riverwoods?
In Riverwoods, during the entire year, the rain falls for 143.1 days and collects up to 26.97" (685mm) of precipitation.
When does it snow in Riverwoods?
January through May, October through December are months with snowfall in Riverwoods, Illinois.
What is the snowiest month in Riverwoods?
The months with the most snowfall in Riverwoods are January and February, with an average 5.24" (133mm) of accumulated snow.
How much does it snow in Riverwoods?
Throughout the year, there are 48.6 snowfall days, and 18.78" (477mm) of snow is accumulated.
What is the month with the least sunshine in Riverwoods?
With an average of 3.7h of sunshine, January has the least sunshine of the year in Riverwoods.
When is Daylight Saving Time (DST) in Riverwoods?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Riverwoods, 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 in Riverwoods?
The month with the most rainfall is May, when the rain falls for 16.6 days and typically aggregates up to 3.39" (86mm) of precipitation.
When it does not snow in Riverwoods?
In Riverwoods, snow does not fall in June through September.
When are the longest days in Riverwoods?
With an average of 15h and 12min of daylight, June has the longest days of the year in Riverwoods, Illinois.
What are the months with the highest UV index in Riverwoods?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What are the warmest months in Riverwoods?
July is the month when Riverwoods sees the average highest temperatures, with a high of 80.2°F (26.8°C) and a low of 66.6°F (19.2°C).
What month has the most sunshine in Riverwoods?
With an average of 10.5h of sunshine, August has the most sunshine of the year.
What is the least humid month in Riverwoods?
The least humid month in Riverwoods, Illinois, is October, with an average relative humidity of 73%.
What is the driest month in Riverwoods?
November is the month with the least rainfall. Rain falls for 9.5 days and accumulates 1.5" (38mm) of precipitation.
What is the month with the shortest days in Riverwoods?
The month with the shortest days in Riverwoods, Illinois, is December, with an average of 9h and 12min of daylight.
When is the lowest UV index in Riverwoods?
The month with the lowest UV index in Riverwoods is December, with an average maximum UV index of 1.
Average temperature
Riverwoods, IL
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (28.6°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure
Riverwoods, IL
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.09"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 (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Riverwoods, IL
- Average wind speed in January:
10.9mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10mph - Average wind speed in April:
10.2mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.9mph - Average wind speed in August:
6.8mph - Average wind speed in September:
8mph - Average wind speed in October:
9.7mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity
Riverwoods, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Riverwoods, IL
- Average rainfall in January:
1.73" - Average rainfall in February:
1.85" - Average rainfall in March:
1.93" - Average rainfall in April:
3.23" - Average rainfall in May:
3.39" - Average rainfall in June:
3.11"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is November (1.5").
Average rainfall days
Riverwoods, IL
- Average rainfall days in January:
7.5 days - Average rainfall days in February:
6.3 days - Average rainfall days in March:
12.1 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
14.1 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
12.2 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
9.5 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (6.3 days).
Average snowfall
Riverwoods, IL
- Average snowfall in January:
5.24" - Average snowfall in February:
5.24" - Average snowfall in March:
1.57" - Average snowfall in April:
2.36" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The months with the highest snowfall are January and February (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Riverwoods, IL
- Average snowfall days in January:
13.4 days - Average snowfall days in February:
11.8 days - Average snowfall days in March:
6.9 days - Average snowfall days in April:
1.9 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:
0.4 days - Average snowfall days in November:
3.9 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
Riverwoods, 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 4min - 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 3min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Riverwoods, IL
- Average sunshine days in January:
12.3 days - Average sunshine days in February:
10.4 days - Average sunshine days in March:
13.4 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
12.7 days - Average sunshine days in June:
13.9 days
- Average sunshine days in July:
15.4 days - Average sunshine days in August:
16.2 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
17.3 days - Average sunshine days in November:
16.9 days - Average sunshine days in December:
14 days
The month with the most sunshine days is October (17.3 days).
The month with the least sunshine days is February (10.4 days).
Average UV index
Riverwoods, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Riverwoods, 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
Riverwoods, 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).
Riverwoods, Illinois, USA
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