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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 an icy winter month in Riverton, Illinois, with temperature in the range of an average low of 20.8°F (-6.2°C) and an average high of 33.1°F (0.6°C). The coldest temperatures occur during January, when averages reach a peak of 33.1°F (0.6°C) and a low of 20.8°F (-6.2°C). Weather in January »
Weather in February
February, the last month of the winter in Riverton, is another cold month, with an average temperature ranging between max 37.9°F (3.3°C) and min 25°F (-3.9°C). Riverton transitions into February recording an average high-temperature of a still cold 37.9°F (3.3°C), closely aligning with the preceding month's temperature. Weather in February »
Weather in March
March, the first month of the spring in Riverton, is a cool month, with an average temperature ranging between min 35.6°F (2°C) and max 51.1°F (10.6°C). The transition to March introduces an increase in the average high-temperature, shifting from a cold 37.9°F (3.3°C) in February to a fresh 51.1°F (10.6°C). Weather in March »
Weather in April
April is a refreshing spring month in Riverton, Illinois, with an average temperature fluctuating between 63.1°F (17.3°C) and 46.2°F (7.9°C). As March gives way to April, the average high-temperature displays an increase, moving from a cool 51.1°F (10.6°C) to an enjoyable 63.1°F (17.3°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Riverton, Illinois, with temperature in the range of an average high of 72.9°F (22.7°C) and an average low of 56.5°F (13.6°C). Riverton in May shows a temperature shift, moving from an average high of a comfortable 63.1°F (17.3°C) in April to an agreeable 72.9°F (22.7°C). Weather in May »
Weather in June
June, the first month of the summer in Riverton, is a warm month, with an average temperature ranging between min 64.4°F (18°C) and max 81.1°F (27.3°C). June's arrival signals a subtle increase in average high-temperatures, moving from May's pleasant 72.9°F (22.7°C) to a moderately hot 81.1°F (27.3°C). Weather in June »
Weather in July
July, like June, in Riverton, Illinois, is a moderately hot summer month, with an average temperature ranging between max 82.8°F (28.2°C) and min 66°F (18.9°C). Riverton, Illinois, experiences its highest temperatures in July, with an average peak of 82.8°F (28.2°C) and a low of 66°F (18.9°C). Throughout July, the heat index is computed to be a hot 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Riverton, is also a moderately hot month, with an average temperature ranging between min 64°F (17.8°C) and max 81.7°F (27.6°C). With August's arrival, Riverton's weather records an average high-temperature of a still warm 81.7°F (27.6°C), marking little difference from July's 82.8°F (28.2°C). Weather in August »
Weather in September
September, the first month of the autumn in Riverton, is also a moderately hot month, with an average temperature fluctuating between 58.5°F (14.7°C) and 77.2°F (25.1°C). The shift to September signals an average high-temperature of a still moderately hot 77.2°F (25.1°C), subtly varied from August's 81.7°F (27.6°C). Weather in September »
Weather in October
October, like September, in Riverton, Illinois, is another refreshing autumn month, with an average temperature fluctuating between 48.2°F (9°C) and 64°F (17.8°C). The arrival of October signals a shift in temperature, down from a warm 77.2°F (25.1°C) in September to an enjoyable 64°F (17.8°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Riverton, Illinois, with temperature in the range of an average high of 50°F (10°C) and an average low of 36.5°F (2.5°C). The onset of November entails a temperature shift, as the average high-temperature decreases from a comfortable 64°F (17.8°C) in October to a cool 50°F (10°C). Weather in November »
Weather in December
December, the first month of the winter in Riverton, is also an icy month, with an average temperature fluctuating between 38.7°F (3.7°C) and 28.2°F (-2.1°C). The start of December signals a decrease in the average high-temperature, transitioning from a fresh 50°F (10°C) in November to a cold 38.7°F (3.7°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Riverton?
January is the month when Riverton, Illinois, sees the average lowest temperatures, with a high of 33.1°F (0.6°C) and a low of 20.8°F (-6.2°C).
How much does it rain in Riverton?
Throughout the year, in Riverton, there are 131.5 rainfall days, and 18.54" (471mm) of precipitation is accumulated.
When does it snow in Riverton?
Months with snowfall in Riverton are January through April, November and December.
What is the snowiest month in Riverton?
January is the month with the most snowfall in Riverton, Illinois. Snow falls for 8 days and accumulates 1.81" (46mm) of snow.
How many days does it snow in Riverton?
Throughout the year, in Riverton, Illinois, there are 24.5 snowfall days, and 5.51" (140mm) of snow is accumulated.
What is the month with the least sunshine in Riverton?
January has the least sunshine of the year, with an average of 4.1h of sunshine.
What are the months with the lowest UV index in Riverton?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST) in Riverton?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Riverton, 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.
When it does not snow in Riverton?
In Riverton, snow does not fall in May through October.
What is the rainiest month in Riverton?
June is the month with the most rainfall in Riverton. Rain falls for 14.6 days and accumulates 2.36" (60mm) of precipitation.
When are the longest days in Riverton?
The month with the longest days in Riverton is June, with an average of 15h and 0min of daylight.
What month has the most sunshine in Riverton?
June has the most sunshine of the year in Riverton, Illinois, with an average of 10.4h of sunshine.
What are the months with the highest UV index in Riverton?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What time of the year is the hottest in Riverton?
July is the month when Riverton, Illinois, sees the average highest temperatures, with a high of 82.8°F (28.2°C) and a low of 66°F (18.9°C).
What is the most humid month in Riverton?
The most humid month is July, with an average relative humidity of 84%.
What is the least humid month in Riverton?
With an average relative humidity of 70%, October is the least humid month in Riverton, Illinois.
What is the driest month in Riverton?
The month with the least rainfall is December, when the rain falls for 6.6 days and typically collects 0.83" (21mm) of precipitation.
What is the month with the shortest days in Riverton?
With an average of 9h and 24min of daylight, December has the shortest days of the year in Riverton, Illinois.
Average temperature
Riverton, IL
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.1°F).
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure
Riverton, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"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:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Riverton, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.2mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.1mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.8mph
The windiest months (with the highest average wind speed) are January and April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity
Riverton, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Riverton, IL
- Average rainfall in January:
1.06" - Average rainfall in February:
0.98" - Average rainfall in March:
1.34" - Average rainfall in April:
2.05" - Average rainfall in May:
2.09" - Average rainfall in June:
2.36"
- Average rainfall in July:
1.69" - Average rainfall in August:
1.89" - Average rainfall in September:
1.85" - Average rainfall in October:
1.46" - Average rainfall in November:
0.94" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is December (0.83").
Average rainfall days
Riverton, IL
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
5.7 days - Average rainfall days in March:
11.5 days - Average rainfall days in April:
13.6 days - Average rainfall days in May:
17 days - Average rainfall days in June:
14.6 days
- Average rainfall days in July:
14.6 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
8.2 days - Average rainfall days in December:
6.6 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.7 days).
Average snowfall
Riverton, IL
The month with the highest snowfall is January (1.81").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Riverton, IL
- Average snowfall days in January:
8 days - Average snowfall days in February:
6.3 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.5 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:
1.5 days - Average snowfall days in December:
4.8 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Riverton, 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 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:
4h and 1min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 1min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Riverton, IL
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
16.3 days - Average sunshine days in March:
16.2 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
13.1 days - Average sunshine days in August:
14.7 days - Average sunshine days in September:
16.8 days - Average sunshine days in October:
20 days - Average sunshine days in November:
19.9 days - Average sunshine days in December:
20.5 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.5 days).
Average UV index
Riverton, 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, February, November and December (UV index 2).
Average cloud cover
Riverton, IL
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are June, August and September (Cloud cover 30).
Average visibility
Riverton, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Riverton, Illinois, USA
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