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 River Sioux, Iowa, is another subzero cold winter month, with an average temperature varying between 28.8°F (-1.8°C) and 15.3°F (-9.3°C). January stands out as River Sioux's coldest month, with temperatures ranging between an average high of 28.8°F (-1.8°C) and a low of 15.3°F (-9.3°C). Weather in January »
Weather in February
The last month of the winter, February, is an icy month in River Sioux, Iowa, with temperature in the range of an average high of 32.7°F (0.4°C) and an average low of 18.7°F (-7.4°C). The shift into February uncovers an average high-temperature of a wintry 32.7°F (0.4°C), subtly different from the previous month. Weather in February »
Weather in March
March, the first month of the spring in River Sioux, is a frosty month, with an average temperature fluctuating between 32.7°F (0.4°C) and 48.7°F (9.3°C). River Sioux sees a considerable increase in average high-temperatures during March, surging from a wintry 32.7°F (0.4°C) in February to a frosty 48.7°F (9.3°C). Weather in March »
Weather in April
April in River Sioux, Iowa, is a mild spring month, with temperature in the range of an average high of 59.9°F (15.5°C) and an average low of 42.4°F (5.8°C). The shift into April is accompanied by a temperature increase, with the average high-temperature rising from a frosty 48.7°F (9.3°C) in March to a refreshing 59.9°F (15.5°C). Weather in April »
Weather in May
May, the last month of the spring in River Sioux, is a pleasant month, with temperature in the range of an average low of 53.2°F (11.8°C) and an average high of 70.7°F (21.5°C). The onset of May brings a rise in the average high-temperature, elevating from a refreshing 59.9°F (15.5°C) in April to an agreeable 70.7°F (21.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in River Sioux, Iowa, with an average temperature varying between 63.7°F (17.6°C) and 80.8°F (27.1°C). June's arrival brings a change in high-temperatures, moving from a pleasant 70.7°F (21.5°C) in May to a warm 80.8°F (27.1°C). Weather in June »
Weather in July
July, like June, in River Sioux, Iowa, is another warm summer month, with an average temperature varying between 84.4°F (29.1°C) and 65.5°F (18.6°C). River Sioux's temperatures peak on average in July, reaching 84.4°F (29.1°C) at their highest and 65.5°F (18.6°C) at their lowest. For July, the heat index is evaluated at a tropical 93.2°F (34°C). Weather in July »
Weather in August
August, the last month of the summer in River Sioux, is another warm month, with an average temperature varying between 82.2°F (27.9°C) and 62.2°F (16.8°C). August begins with an average high-temperature of a still moderately hot 82.2°F (27.9°C), reflecting close similarity to the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in River Sioux, is still a warm month, with an average temperature varying between 76.5°F (24.7°C) and 56.3°F (13.5°C). River Sioux's September weather shows a modest shift in high-temperatures, falling from August's warm 82.2°F (27.9°C) to a still moderately hot 76.5°F (24.7°C). Weather in September »
Weather in October
October, like September, in River Sioux, Iowa, is another comfortable autumn month, with an average temperature varying between 44.6°F (7°C) and 61°F (16.1°C). As October arrives, River Sioux's weather displays a notable decrease in high-temperatures, falling from September's warm 76.5°F (24.7°C) to a refreshing 61°F (16.1°C). Weather in October »
Weather in November
November, the last month of the autumn in River Sioux, is also a frosty month, with an average temperature ranging between min 32.9°F (0.5°C) and max 47.5°F (8.6°C). The shift from October to November involves a decrease in the average high-temperature, from a comfortable 61°F (16.1°C) to a frosty 47.5°F (8.6°C). Weather in November »
Weather in December
December, the first month of the winter in River Sioux, is also a wintry month, with an average temperature ranging between max 32.9°F (0.5°C) and min 21°F (-6.1°C). The beginning of December signals a clear reduction in the average high-temperature, falling from a chilly 47.5°F (8.6°C) in November to a cold 32.9°F (0.5°C). Weather in December »
[Resources]Frequently asked questions
What month is the coldest in River Sioux?
River Sioux, Iowa, reaches its average lowest temperatures in January, measuring 28.8°F (-1.8°C) at the peak and 15.3°F (-9.3°C) at the lowest.
What is the most humid month in River Sioux?
With an average relative humidity of 81%, January is the most humid month.
What is the driest month in River Sioux?
January is the month with the least rainfall in River Sioux. Rain falls for 4.3 days and accumulates 0.71" (18mm) of precipitation.
How much does it rain in River Sioux?
In River Sioux, during the entire year, the rain falls for 125.1 days and collects up to 22.64" (575mm) of precipitation.
When does it snow in River Sioux?
Months with snowfall in River Sioux are January through May, October through December.
What is the snowiest month in River Sioux?
The month with the most snowfall in River Sioux, Iowa, is January, when snow falls for 9.4 days and typically aggregates up to 2.8" (71mm) of snow.
How much does it snow in River Sioux?
Throughout the year, there are 32.8 snowfall days, and 11.97" (304mm) of snow is accumulated.
What is the month with the least sunshine in River Sioux?
January has the least sunshine of the year, with an average of 4.7h of sunshine.
What is the month with the lowest UV index in River Sioux?
The months with the lowest UV index in River Sioux, Iowa, are January, February, November and December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST) in River Sioux?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in River Sioux, 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 River Sioux?
May is the month with the most rainfall in River Sioux. Rain falls for 16.3 days and accumulates 3.5" (89mm) of precipitation.
When it does not snow in River Sioux?
June through September are months without snowfall in River Sioux, Iowa.
When are the longest days in River Sioux?
The month with the longest days in River Sioux is June, with an average of 15h and 12min of daylight.
What are the months with the highest UV index in River Sioux?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What part of the year is the hottest in River Sioux?
River Sioux's temperatures tend to reach their peak averages in July, with a high of 84.4°F (29.1°C) and a low of 65.5°F (18.6°C).
What month has the most sunshine in River Sioux?
July has the most sunshine of the year, with an average of 10.7h of sunshine.
What is the least humid month in River Sioux?
October is the least humid month, with an average relative humidity of 66%.
What is the month with the shortest days in River Sioux?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
River Sioux, IA
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure
River Sioux, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.86"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed
River Sioux, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.8mph - Average wind speed in May:
9.2mph - Average wind speed in June:
8.6mph
- Average wind speed in July:
7.2mph - Average wind speed in August:
7.5mph - Average wind speed in September:
8.6mph - Average wind speed in October:
9.8mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity
River Sioux, IA
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (66%).
Average rainfall
River Sioux, IA
- Average rainfall in January:
0.71" - Average rainfall in February:
0.79" - Average rainfall in March:
1.54" - Average rainfall in April:
2.13" - Average rainfall in May:
3.5" - Average rainfall in June:
3.11"
- Average rainfall in July:
1.89" - Average rainfall in August:
2.4" - Average rainfall in September:
2.09" - Average rainfall in October:
2.24" - Average rainfall in November:
0.83" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days
River Sioux, IA
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
16.8 days
- Average rainfall days in July:
13.2 days - Average rainfall days in August:
14 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
6.3 days - Average rainfall days in December:
4.6 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall
River Sioux, IA
- Average snowfall in January:
2.8" - Average snowfall in February:
2.76" - Average snowfall in March:
2.36" - Average snowfall in April:
0.98" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (2.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
River Sioux, IA
- Average snowfall days in January:
9.4 days - Average snowfall days in February:
7.9 days - Average snowfall days in March:
4.4 days - Average snowfall days in April:
1.2 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:
0.8 days - Average snowfall days in November:
2.1 days - Average snowfall days in December:
6.8 days
The month with the highest number of snowfall days is January (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
River Sioux, IA
- 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:
4h and 4min - Average sunshine in February:
5h and 3min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 0min - Average sunshine in October:
6h and 1min - Average sunshine in November:
6h and 0min - Average sunshine in December:
5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
River Sioux, IA
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
16.4 days - Average sunshine days in April:
13.2 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
15 days - Average sunshine days in August:
14.8 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
20.7 days - Average sunshine days in December:
20.2 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is June (11.3 days).
Average UV index
River Sioux, IA
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
River Sioux, IA
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility
River Sioux, IA
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).
River Sioux, Iowa, 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
