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 Riverside, Illinois, is another subzero cold winter month, with temperature in the range of an average low of 19.2°F (-7.1°C) and an average high of 29.1°F (-1.6°C). Riverside reaches its lowest average temperatures in January, measuring 29.1°F (-1.6°C) at the peak and 19.2°F (-7.1°C) at the lowest. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Riverside, Illinois, with an average temperature fluctuating between 32.4°F (0.2°C) and 21.6°F (-5.8°C). In February, the average high-temperature registers at a wintry 32.4°F (0.2°C), nearly identical to January's 29.1°F (-1.6°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Riverside, Illinois, with temperature in the range of an average low of 32.2°F (0.1°C) and an average high of 43.7°F (6.5°C). In Riverside, stepping into March brings a temperature increase, moving up from February's cold 32.4°F (0.2°C) to a frosty 43.7°F (6.5°C). Weather in March »
Weather in April
April is a fresh spring month in Riverside, Illinois, with an average temperature varying between 40.8°F (4.9°C) and 53.8°F (12.1°C). The start of April signals an increase in the average high-temperature, moving from a frosty 43.7°F (6.5°C) in March to a cool 53.8°F (12.1°C). Weather in April »
Weather in May
The last month of the spring, May, is a comfortable month in Riverside, Illinois, with temperature in the range of an average high of 64.9°F (18.3°C) and an average low of 51.4°F (10.8°C). In May, the meteorological conditions change with the average high-temperature moving from a fresh 53.8°F (12.1°C) in April to an enjoyable 64.9°F (18.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Riverside, Illinois, with an average temperature ranging between max 75°F (23.9°C) and min 61.3°F (16.3°C). June's arrival coincides with a rise in the average high-temperature, moving from May's refreshing 64.9°F (18.3°C) to a warm 75°F (23.9°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Riverside, Illinois, with an average temperature fluctuating between 80.4°F (26.9°C) and 67.1°F (19.5°C). Riverside's July weather, with an average high temperature of 80.4°F (26.9°C) and an average low temperature of 67.1°F (19.5°C), tends to be the warmest of the year. Weather in July »
Weather in August
August, the last month of the summer in Riverside, is also a moderately hot month, with an average temperature ranging between min 66.7°F (19.3°C) and max 79.3°F (26.3°C). August's weather displays an average high-temperature of a still moderately hot 79.3°F (26.3°C), slightly varied from July's 80.4°F (26.9°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Riverside, Illinois, with an average temperature fluctuating between 59.5°F (15.3°C) and 72.9°F (22.7°C). In September, the meteorological conditions change slightly, with the average high-temperature moving from a moderately hot 79.3°F (26.3°C) in August to an agreeable 72.9°F (22.7°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Riverside, Illinois, with temperature in the range of an average low of 47.7°F (8.7°C) and an average high of 59.9°F (15.5°C). The shift from September to October corresponds with a decrease in the average high-temperature, down to a refreshing 59.9°F (15.5°C) from an agreeable 72.9°F (22.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Riverside, is also a frosty month, with an average temperature ranging between min 35.4°F (1.9°C) and max 46°F (7.8°C). The onset of November is marked by a decrease in temperature, transitioning from a refreshing 59.9°F (15.5°C) in October to a frosty 46°F (7.8°C). Weather in November »
Weather in December
December, the first month of the winter in Riverside, is also an icy month, with temperature in the range of an average low of 26.4°F (-3.1°C) and an average high of 35.1°F (1.7°C). A moderate decline in the average high-temperature is seen during December, decreasing from a chilly 46°F (7.8°C) in November to a cold 35.1°F (1.7°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 Riverside?
In Riverside, the average lowest temperatures are observed in January, with a high of 29.1°F (-1.6°C) and a low of 19.2°F (-7.1°C).
What are the most humid months in Riverside?
January and February, with an average relative humidity of 82%, are most humid months.
How much does it rain in Riverside?
Throughout the year, in Riverside, Illinois, there are 92 rainfall days, and 7.4" (188mm) of precipitation is accumulated.
When does it snow in Riverside?
January through April, October through December are months with snowfall in Riverside, Illinois.
How much does it snow in Riverside?
In Riverside, during the entire year, snow falls for 26.5 days and aggregates up to 4.06" (103mm) of snow.
What is the month with the least sunshine in Riverside?
With an average of 3.8h of sunshine, January has the least sunshine of the year in Riverside, Illinois.
What is the month with the lowest UV index in Riverside?
The months with the lowest UV index in Riverside, Illinois, are January and December, with an average maximum UV index of 1.
What is the driest month in Riverside?
February, March, November and December are months with the least rain in Riverside, Illinois, when the rain falls for 3.3 days and typically aggregates up to 0.39" (10mm) of rain.
What is the snowiest month in Riverside?
February is the month with the most snowfall in Riverside, Illinois. Snow falls for 7.3 days and accumulates 1.38" (35mm) of snow.
When is Daylight Saving Time (DST) in Riverside?
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 in Riverside?
The month with the most rainfall in Riverside is May, when the rain falls for 11.3 days and typically aggregates up to 1.1" (28mm) of precipitation.
When it does not snow in Riverside?
In Riverside, Illinois, snow does not fall in May through September.
When are the longest days in Riverside?
June has the longest days of the year in Riverside, with an average of 15h and 12min of daylight.
When is the highest UV index in Riverside?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Riverside.
What is the hottest time of year in Riverside?
In Riverside, July is known for its average highest temperatures, reaching a high of 80.4°F (26.9°C) and a low of 67.1°F (19.5°C).
What month has the most sunshine in Riverside?
August has the most sunshine of the year, with an average of 10.6h of sunshine.
What is the least humid month in Riverside?
October is the least humid month in Riverside, with an average relative humidity of 72%.
What is the month with the shortest days in Riverside?
December has the shortest days of the year in Riverside, Illinois, with an average of 9h and 12min of daylight.
Average temperature
Riverside, IL
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (29.1°F).
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure
Riverside, 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
Riverside, IL
- Average wind speed in January:
10.9mph - Average wind speed in February:
10.6mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10.1mph - 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:
8.1mph - Average wind speed in October:
9.9mph - Average wind speed in November:
10.6mph - Average wind speed in December:
10.3mph
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
Riverside, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Riverside, IL
- Average rainfall in January:
0.43" - Average rainfall in February:
0.39" - Average rainfall in March:
0.39" - Average rainfall in April:
0.75" - Average rainfall in May:
1.1" - Average rainfall in June:
0.83"
- Average rainfall in July:
0.91" - Average rainfall in August:
0.63" - Average rainfall in September:
0.51" - Average rainfall in October:
0.67" - Average rainfall in November:
0.39" - Average rainfall in December:
0.39"
The wettest month (with the highest rainfall) is May (1.1").
The driest months (with the least rainfall) are February, March, November and December (0.39").
Average rainfall days
Riverside, IL
- Average rainfall days in January:
3.1 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
7.8 days - Average rainfall days in April:
10.5 days - Average rainfall days in May:
11.3 days - Average rainfall days in June:
11.7 days
- Average rainfall days in July:
10.8 days - Average rainfall days in August:
9.5 days - Average rainfall days in September:
7.5 days - Average rainfall days in October:
6.7 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
4.3 days
The month with the highest number of rainy days is June (11.7 days).
The month with the least rainy days is January (3.1 days).
Average snowfall
Riverside, IL
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Riverside, IL
- Average snowfall days in January:
7.2 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
4.3 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:
0.1 days - Average snowfall days in November:
1.8 days - Average snowfall days in December:
4.5 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Riverside, 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 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 5min - 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 5min - 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 1min - 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 48min).
Average sunshine days
Riverside, IL
- Average sunshine days in January:
22.1 days - Average sunshine days in February:
20.3 days - Average sunshine days in March:
19.4 days - Average sunshine days in April:
16.3 days - Average sunshine days in May:
15.4 days - Average sunshine days in June:
14.3 days
- Average sunshine days in July:
14.6 days - Average sunshine days in August:
17.2 days - Average sunshine days in September:
19.9 days - Average sunshine days in October:
22.4 days - Average sunshine days in November:
22.5 days - Average sunshine days in December:
23.7 days
The month with the most sunshine days is December (23.7 days).
The month with the least sunshine days is June (14.3 days).
Average UV index
Riverside, 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
Riverside, 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
Riverside, 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).
Riverside, 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