Climate and monthly weather forecastSouth Sioux City, NE
Climate and monthly weather forecast
The climate of South Sioux City
Designated within the Köppen climate classification as Dfa, South Sioux City, Nebraska, USA is characterised by a humid continental climate. There is no dry season and the city experiences hot summers. This geographically located city in the Midwestern United States presents conditions typified by substantial temperature variations throughout the year and an balanced distribution of annual rainfall.Monthly average temperatures in South Sioux City range from a comfortable 13.5°F (-10.3°C) during the cooler months to a toasty 83.8°F (28.8°C) in the peak of the warmer season. Essential to note is the fluctuation in humidity, which presents a span from 67% in the dry periods to 83% in the more humid intervals. Rainfall also shows considerable variation, with monthly averages ranging from a light 0.39" (10mm) to a substantial 1.85" (47mm).
The most remarkable aspect of the region's climate is its unique weather patterns. For instance, despite its humid categorisation, South Sioux City does not experience precipitation throughout the year. Snowfall is observed from January through April, then reappears in late November and December, leaving five months free from snow. The most substantial downpour of rain is witnessed in June, followed by a considerable decrease in the ensuing months. This pattern is also reflected in the number of rainfall days, with June recording the peak and then a consistent decline noted from July to November.
The best time to visit South Sioux City
Ideal weather conditions are subjective and depend on personal comfort and preferences. However, conditions associated with moderate temperatures and lower precipitation are, to many, the epitome of perfect weather. South Sioux City offers such conditions from May to September when the average temperature hovers around a pleasant 70°F (21.1°C) to 80.1°F (26.7°C). Rainfall during these months is moderate to low, making this window of time particularly appealing.Moreover, this period encompasses the lengthiest daylight hours, extending from 14.6 hours in May to a maximum of 15.3 hours in June before shrinking to 12.5 hours in September.
The worst time to visit South Sioux City
For those averse to colder weather, the first few months of the year would not represent the optimal time to visit South Sioux City. From January to April, the average temperature remains within 13.5°F (-10.3°C) to 58.6°F (14.8°C). Precipitation in the form of both rain and snow characterizes the weather during these months, with snowfall reaching 1.42" (36mm) in December and rainfall peaking at 1.57" (40mm) in April.Spring weather in South Sioux City
The spring in South Sioux City, from March to May, is a time of transitional weather. Temperatures gradually rise to 70°F (21.1°C) by May from 31.1°F (-0.5°C) in March. During this period, the relative humidity decreases to 70% from 73% and there is an upward trend in rainfall, with May registering an average precipitation of 1.73" (44mm).Summer weather in South Sioux City
The summertime, from June to August, is when South Sioux City experiences its highest temperatures and most substantial rainfall. Average temperatures peak at 83.8°F (28.8°C) in July, while humidity escalates to 76%. Rainfall is highest in June at 1.85" (47mm). Despite these trends, the city enjoys prolonged periods of sunlight, reaching up to 15.3 hours of daylight in June.Autumn weather in South Sioux City
Autumn, from September through November, brings a gradual drop in temperature from 75.6°F (24.2°C) to 46.8°F (8.2°C). Concurrently, the city experiences a decrease in rainfall, humidity, and daylight hours. Going from 1.26" (32mm) of rainfall in September to only 0.47" (12mm) by November, and 12.5 hours of daylight in September to 9.8 hours by November.Winter weather in South Sioux City
Winters in South Sioux City, from December to February, can be quite chilly with the average temperature hovering between 13.5°F (-10.3°C) to 31.1°F (-0.5°C). Snowfall is a common feature during these months, peaking at 1.42" (36mm) in December. However, despite the cold conditions, the city experiences surprisingly minimal rainfall during winter, ranging from 0.39" (10mm) to 0.59" (15mm).Weather in January
South Sioux City's January weather can be recognized by its frosty grip, with an average high and low temperature of 27°F (-2.8°C) and 13.5°F (-10.3°C) respectively. The winter chill remains firmly entrenched, seldom spilling over into February, making it colder than December. Weather in January »Weather in February
February brings a small, yet noticeable change from January, paving the way for an early spring atmosphere. It is still comfortably cool with top readings of 31.1°F (-0.5°C) and lows around 17.1°F (-8.3°C). The rapid growth in the daylight hours from 9.5 the previous month to 10.6 in February signals a transition. Weather in February »Weather in March
March recounts the rhetoric of changing seasons in South Sioux City, hinting at the arrival of spring. The temperature increases to 46.8°F (8.2°C) during the day, and around night dips to 30.9°F (-0.6°C), a noticeable increase compared to February's cold days. Weather in March »Weather in April
April ushers in a surge in South Sioux City's weather progression with a pollen-filled air characteristic of blooming spring. The city experiences an unmistakable hike in daytime temperatures from a high of 46.8°F (8.2°C) in March to 58.6°F (14.8°C) in April. Weather in April »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. Weather in May »Weather in June
South Sioux City experiences near-peak summer conditions in June, shedding the subtle cool winds of May. Daytime temperatures now reach 80.1°F (26.7°C), while nights provide respite with 62.6°F (17°C). The overall weather promotes engaging outdoor activities and celebrations, symbolizing the start of summer holidays. Weather in June »Weather in July
South Sioux City in July displays central summer weather in its full bloom. The mercury reaching a peak of 83.8°F (28.8°C) and a low of 64.9°F (18.3°C) makes July the hottest month of the year. South Sioux City relishes the heat with outdoor festivals and pool parties taking center stage. Weather in July »Weather in August
August in South Sioux City presents near-identical climatic conditions to July, with a mild decrease in temperatures. High temperatures mark around 81.9°F (27.7°C) alongside lows of 61.5°F (16.4°C). Despite being summer’s final stretch, the weather remains predominantly warm. Weather in August »Weather in September
September sees a subtle shift in South Sioux City's weather from glaring summer to welcoming fall season. Notable is a drop in daytime temperatures, now averaging 75.6°F (24.2°C). While the weather remains moderately hot, the clear blue skies against the backdrop of burnt-orange leaves begin to transform the landscape. Weather in September »Weather in October
The sweeping autumnal change continues to fashion South Sioux City's weather in October. From high temperatures around 59.9°F (15.5°C), a move toward winter characterizes the month. The progressive change from daylight of 12.5 hours in September to 11 hours in October makes it clear that winter is around the corner. Weather in October »Weather in November
November's weather in South Sioux City reflects a stark shift towards the colder winter months ahead. Temperature highs and lows decrease further to 46.8°F (8.2°C) and 31.6°F (-0.2°C) respectively, marking a considerable drop from October. Weather in November »Weather in December
Wrapping up the year, South Sioux City is under the full gear of winter during December. Freezing temperatures below 31.1°F (-0.5°C) during the day and a chilly 19°F (-7.2°C) at night confirm the arrival of peak winter. Despite the cold, South Sioux City gleams under the festive season, celebrating the holidays with gusto. Weather in December »Updated: Aug 15, 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
January, characterized by an average high temperature of 27°F (-2.8°C) and a low temperature of 13.5°F (-10.3°C), is generally the coldest month.
January is the most humid month in South Sioux City, Nebraska, with an average relative humidity of 83%.
January and February are months with the least rain when the rain falls for 2.6 days and typically aggregates up to 0.39" (10mm) of rain.
Throughout the year, there are 102.3 rainfall days, and 12.91" (328mm) of precipitation is accumulated.
Months with snowfall are January through April, October through December.
January is the month with the most snowfall. Snow falls for 8.2 days and accumulates 1.77" (45mm) of snow.
In South Sioux City, during the entire year, snow falls for 31.1 days and aggregates up to 6.85" (174mm) of snow.
The month with the least sunshine is January, with an average of 4.5h of sunshine.
The month with the lowest UV index is January, with an average maximum UV index of 1.
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.
May through September are months without snowfall.
June is the month with the most rainfall in South Sioux City. Rain falls for 14.6 days and accumulates 1.85" (47mm) of precipitation.
With an average of 15h and 12min of daylight, June has the longest days of the year.
June and July, with an average maximum UV index of 6, are months with the highest UV index.
July is the month when South Sioux City sees the average highest temperatures, with a high of 83.8°F (28.8°C) and a low of 64.9°F (18.3°C).
With an average of 10.7h of sunshine, July has the most sunshine of the year.
October is the least humid month, with an average relative humidity of 65%.
With an average of 9h and 6min of daylight, December has the shortest days of the year.
Average temperature
South Sioux City, NE
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).
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
South Sioux City, NE
- 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:
29.94"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.07"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
South Sioux City, NE
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.7mph - Average wind speed in April:
11mph - Average wind speed in May:
9.4mph - Average wind speed in June:
8.7mph
- Average wind speed in July:
7.5mph - Average wind speed in August:
7.8mph - Average wind speed in September:
8.9mph - Average wind speed in October:
10.1mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.3mph
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
South Sioux City, NE
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (65%).
Average rainfall
South Sioux City, NE
- Average rainfall in January:
0.39" - Average rainfall in February:
0.39" - Average rainfall in March:
0.87" - Average rainfall in April:
1.57" - Average rainfall in May:
1.73" - Average rainfall in June:
1.85"
- Average rainfall in July:
1.34" - Average rainfall in August:
1.5" - Average rainfall in September:
1.26" - Average rainfall in October:
0.94" - Average rainfall in November:
0.47" - Average rainfall in December:
0.59"
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
South Sioux City, NE
- Average rainfall days in January:
2.6 days - Average rainfall days in February:
3.2 days - Average rainfall days in March:
8.3 days - Average rainfall days in April:
11.5 days - Average rainfall days in May:
13.5 days - Average rainfall days in June:
14.6 days
- Average rainfall days in July:
10.5 days - Average rainfall days in August:
11.7 days - Average rainfall days in September:
9.7 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
5 days - Average rainfall days in December:
3.2 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
South Sioux City, NE
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
South Sioux City, NE
- Average snowfall days in January:
8.2 days - Average snowfall days in February:
6.9 days - Average snowfall days in March:
4.2 days - Average snowfall days in April:
1.4 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:
0.6 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
7.3 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 / Average sunshine
South Sioux City, NE
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 6min
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 January:
4h and 30min - Average sunshine in February:
5h and 18min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 54min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
9h and 54min - Average sunshine in September:
8h and 54min - Average sunshine in October:
6h and 18min - Average sunshine in November:
5h and 54min - Average sunshine in December:
4h and 48min
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
South Sioux City, NE
- Average sunshine days in January:
22.6 days - Average sunshine days in February:
19.8 days - Average sunshine days in March:
17.5 days - Average sunshine days in April:
15.7 days - Average sunshine days in May:
15.3 days - Average sunshine days in June:
13.1 days
- Average sunshine days in July:
17.1 days - Average sunshine days in August:
16.1 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
20.6 days - Average sunshine days in November:
22.5 days - Average sunshine days in December:
22.4 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
South Sioux City, NE
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
South Sioux City, NE
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
South Sioux City, NE
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).
