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 »