Climate and monthly weather forecast
Sioux Falls, SD

The Sioux Falls in South Dakota, flowing downstream over rocks under the perfect evening skyline
The Sioux Falls in South Dakota, flowing downstream over rocks under the perfect evening skyline

Weather in January

January, the same as December, in Sioux Falls, South Dakota, is another subzero cold winter month, with temperature in the range of an average high of 23.4°F (-4.8°C) and an average low of 9.7°F (-12.4°C). The coldest month is January, with an average high-temperature of 23.4°F (-4.8°C) and an average low-temperature of 9.7°F (-12.4°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Sioux Falls, South Dakota, with an average temperature varying between 27°F (-2.8°C) and 13.1°F (-10.5°C). In February, the average high-temperature is relatively the same as in January - a still subzero cold 27°F (-2.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Sioux Falls, South Dakota, with an average temperature fluctuating between 43.2°F (6.2°C) and 27.7°F (-2.4°C). In Sioux Falls, South Dakota, the average high-temperature in March significantly increases from a subzero cold 27°F (-2.8°C) in February to a frosty 43.2°F (6.2°C). Weather in March »

Weather in April

April in Sioux Falls, South Dakota, is a mild spring month, with temperature in the range of an average low of 38.5°F (3.6°C) and an average high of 55.4°F (13°C). In April, the average high-temperature rises from a frosty 43.2°F (6.2°C) in March to a mild 55.4°F (13°C). Weather in April »

Weather in May

May, the last month of the spring in Sioux Falls, is a comfortable month, with temperature in the range of an average low of 50.4°F (10.2°C) and an average high of 67.5°F (19.7°C). In Sioux Falls, the average high-temperature in May rises from a moderate 55.4°F (13°C) in April to an enjoyable 67.5°F (19.7°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Sioux Falls, South Dakota, with an average temperature varying between 77.5°F (25.3°C) and 60.3°F (15.7°C). In Sioux Falls, the average high-temperature in June increases from a comfortable 67.5°F (19.7°C) in May to a moderately hot 77.5°F (25.3°C). Weather in June »

Weather in July

July, like June, in Sioux Falls, South Dakota, is another warm summer month, with an average temperature varying between 63.1°F (17.3°C) and 82.4°F (28°C). With an average high-temperature of 82.4°F (28°C) and an average low-temperature of 63.1°F (17.3°C), July is the warmest month. In July, the average heat index is appraised at a tropical 88.5°F (31.4°C). Weather in July »

Weather in August

August, the last month of the summer in Sioux Falls, is also a moderately hot month, with an average temperature fluctuating between 81.1°F (27.3°C) and 59.5°F (15.3°C). In Sioux Falls, the average high-temperature in August is almost the same as in July - a still warm 81.1°F (27.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Sioux Falls, is also a moderately hot month, with an average temperature varying between 74.3°F (23.5°C) and 53.2°F (11.8°C). In September, the average high-temperature marginally drops from 81.1°F (27.3°C) in August to a still warm 74.3°F (23.5°C). Weather in September »

Weather in October

October, the same as September, in Sioux Falls, South Dakota, is another mild autumn month, with an average temperature ranging between min 41.2°F (5.1°C) and max 57.4°F (14.1°C). In Sioux Falls, the average high-temperature in October plummets from a warm 74.3°F (23.5°C) in September to a moderate 57.4°F (14.1°C). Weather in October »

Weather in November

November, the last month of the autumn in Sioux Falls, is another chilly month, with an average temperature varying between 43.2°F (6.2°C) and 29.3°F (-1.5°C). In November, the average high-temperature drops from a moderate 57.4°F (14.1°C) in October to a frosty 43.2°F (6.2°C). Weather in November »

Weather in December

December, the first month of the winter in Sioux Falls, is still a freezing cold month, with an average temperature fluctuating between 15.6°F (-9.1°C) and 27.5°F (-2.5°C). In December, the average high-temperature declines considerably from a frosty 43.2°F (6.2°C) in November to a freezing cold 27.5°F (-2.5°C). Weather in December »
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FAQ

What is the coldest month in Sioux Falls?

With an average high-temperature of 23.4°F (-4.8°C) and an average low-temperature of 9.7°F (-12.4°C), January is the coldest month.

What is the most humid month in Sioux Falls?

With an average relative humidity of 88%, January is the most humid month in Sioux Falls.

What is the driest month in Sioux Falls?

January, February and November are months with the least rain when the rain falls for 3.8 days and typically aggregates up to 0.67" (17mm) of rain.

How much does it rain in Sioux Falls?

In Sioux Falls, during the entire year, the rain falls for 117.1 days and collects up to 20.71" (526mm) of precipitation.

When does it snow in Sioux Falls?

January through May, October through December are months with snowfall in Sioux Falls, South Dakota.

How much does it snow in Sioux Falls?

In Sioux Falls, South Dakota, during the entire year, snow falls for 48.7 days and aggregates up to 18.23" (463mm) of snow.

What is the month with the least sunshine in Sioux Falls?

January has the least sunshine of the year, with an average of 4h of sunshine.

When is the lowest UV index in Sioux Falls?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the snowiest month in Sioux Falls?

The month with the most snowfall in Sioux Falls is February, when snow falls for 8.9 days and typically aggregates up to 4.25" (108mm) of snow.

When is Daylight Saving Time (DST) in Sioux Falls?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Sioux Falls, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

What is the rainiest month in Sioux Falls?

June is the month with the most rainfall. Rain falls for 17.8 days and accumulates 3.27" (83mm) of precipitation.

When it does not snow in Sioux Falls?

In Sioux Falls, snow does not fall in June through September.

When are the longest days in Sioux Falls?

The month with the longest days in Sioux Falls is June, with an average of 15h and 22min of daylight.

When is the highest UV index in Sioux Falls?

The months with the highest UV index are June and July, with an average maximum UV index of 6.

What is the warmest month in Sioux Falls?

With an average high-temperature of 82.4°F (28°C) and an average low-temperature of 63.1°F (17.3°C), July is the warmest month in Sioux Falls, South Dakota.

What month has the most sunshine in Sioux Falls?

The month with the most sunshine in Sioux Falls is July, with an average of 10.7h of sunshine.

What is the least humid month in Sioux Falls?

With an average relative humidity of 66%, October is the least humid month.

What is the month with the shortest days in Sioux Falls?

With an average of 9h and 1min of daylight, December has the shortest days of the year in Sioux Falls, South Dakota.

Average temperature
Sioux Falls, SD

Average temperature - Sioux Falls, SD

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (23.4°F).

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).

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Average pressure
Sioux Falls, SD

Average pressure - Sioux Falls, SD

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed
Sioux Falls, SD

Average wind speed - Sioux Falls, SD

The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is July (8mph).

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Average humidity
Sioux Falls, SD

Average humidity - Sioux Falls, SD

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (66%).

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Average rainfall
Sioux Falls, SD

Average rainfall - Sioux Falls, SD

The wettest month (with the highest rainfall) is June (3.27").
The driest months (with the least rainfall) are January, February and November (0.67").

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Average rainfall days
Sioux Falls, SD

Average rainfall days - Sioux Falls, SD

The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3 days).

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Average snowfall
Sioux Falls, SD

Average snowfall - Sioux Falls, SD

The month with the highest snowfall is February (4.25").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Sioux Falls, SD

Average snowfall days - Sioux Falls, SD

The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Sioux Falls, SD

Average daylight / Average sunshine - Sioux Falls, SD

The month with the longest days is June (Average daylight: 15h and 22min).
The month with the shortest days is December (Average daylight: 9h and 1min).

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 0min).

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Average sunshine days
Sioux Falls, SD

Average sunshine days - Sioux Falls, SD

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is June (10 days).

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Average UV index
Sioux Falls, SD

Average UV index - Sioux Falls, SD

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average visibility
Sioux Falls, SD

Average visibility - Sioux Falls, SD

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

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