May weather forecast
South Sioux City, NE

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Weather in May

May brings a refreshing break from the past months and announces the onset of summer in South Sioux City. A rise occurs in daytime and nighttime temperatures, with highs and lows now reaching 70°F (21.1°C) and 52.5°F (11.4°C). The weather indicates a transformation into summer with increased daylight and reduced snowfall, a common theme for this time of the year. The city now sees blossoming flowers and vibrant greenery unfolding, a consistent soundtrack to the summer season. By the end of May, a visit to one of the city's beaches or parks would be most desirable.

Temperature

The transition to May introduces an increase in the average high-temperature, shifting from a moderate 58.6°F (14.8°C) in April to a pleasant 70°F (21.1°C). South Sioux City cools down to an average low-temperature of 52.5°F (11.4°C) throughout the month of May.

Humidity

In May, the average relative humidity is 70%.

Rainfall

In South Sioux City, during May, the rain falls for 13.5 days and regularly aggregates up to 1.73" (44mm) of precipitation. In South Sioux City, during the entire year, the rain falls for 102.3 days and collects up to 12.91" (328mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in May is 14h and 38min.
On the first day of the month, sunrise is at 6:19 am and sunset at 8:25 pm. On the last day of May, sunrise is at 5:51 am and sunset at 8:55 pm CDT.

Sunshine

In South Sioux City, the average sunshine in May is 8.9h.

UV index

In South Sioux City, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the maximum UV index of 5 suggests these recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. It's recommended to limit sun exposure when its radiation is at its peak during midday. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in May?

May temperatures vary between a high-temperature of 70°F (21.1°C) and a low-temperature of 52.5°F (11.4°C).

What is the average humidity in May?

In South Sioux City, Nebraska, the average relative humidity in May is 70%.

How many days does it rain in May in South Sioux City?

In South Sioux City, in May, it is raining for 13.5 days, with typically 1.73" (44mm) of accumulated precipitation.

When it does not snow?

May through September are months without snowfall in South Sioux City.

Does it snow in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the average length of the day in May?

The average day length in May is 14h and 38min.

When is the sunrise / sunset in May?

On the first day of May, sunrise is at 6:19 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 8:55 pm CDT.

How many hours of sunshine does South Sioux City have in May?

The average sunshine duration in May is 8.9h.

What is the UV index reading in May in South Sioux City?

The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
South Sioux City, NE

Average temperature in May - South Sioux City, NE
  • Average high temperature in May: 70°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in May: 52.5°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).

Average pressure in May
South Sioux City, NE

Average pressure in May - South Sioux City, NE
  • Average pressure in May: 29.92"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 in May
South Sioux City, NE

Average wind speed in May - South Sioux City, NE
  • Average wind speed in May: 9.4mph

The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).

Average humidity in May
South Sioux City, NE

Average humidity in May - South Sioux City, NE
  • Average humidity in May: 70%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (65%).

Average rainfall in May
South Sioux City, NE

Average rainfall in May - South Sioux City, NE
  • Average rainfall in May: 1.73"

The wettest month (with the highest rainfall) is June (1.85").
The driest months (with the least rainfall) are January and February (0.39").

Average rainfall days in May
South Sioux City, NE

Average rainfall days in May - South Sioux City, NE
  • Average rainfall days in May: 13.5 days

The month with the highest number of rainy days is June (14.6 days).
The month with the least rainy days is January (2.6 days).

Average snowfall in May
South Sioux City, NE

Average snowfall in May - South Sioux City, NE
  • Average snowfall in May: 0"

The month with the highest snowfall is January (1.77").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
South Sioux City, NE

Average snowfall days in May - South Sioux City, NE
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
South Sioux City, NE

Average daylight in May / Average sunshine in May - South Sioux City, NE
  • Average daylight in May: 14h and 4min

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 6min).

  • Average sunshine in May: 8h and 5min

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 30min).

Average sunshine days in May
South Sioux City, NE

Average sunshine days in May - South Sioux City, NE
  • Average sunshine days in May: 15.3 days

The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is June (13.1 days).

Average UV index in May
South Sioux City, NE

Average UV index in May - South Sioux City, NE
  • Average UV index in May: 5

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in May
South Sioux City, NE

Average cloud cover in May - South Sioux City, NE
  • Average cloud cover in May: 40

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 25).

Average visibility in May
South Sioux City, NE

Average visibility in May - South Sioux City, NE
  • Average visibility in May: 6mi

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).

South Sioux City, Nebraska, USA

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