Climate and monthly weather forecastNorth Sioux City, SD
Climate and monthly weather forecast
The climate of North Sioux City
North Sioux City, South Dakota, USA, operates under the Köppen climate classification: Dfa, described as a humid continental climate. This climatic system implies that there is no dry season, and the summers tend to be hot. Based on geography, North Sioux City finds itself at the crossroads of several different climates, contributing to its diverse weather conditions.Analysis of climatic data reveals a pattern of varying weather conditions throughout the year. The highest temperatures are experienced from June to August, with an average high oscillating around 79.9°F (26.6°C) to 84°F (28.9°C), and the lowest temperatures recorded between December and February, where the thermometer drops from 13.1°F (-10.5°C) to 16.7°F (-8.5°C). Variety in relative humidity is observed throughout the year, ranging from 65% in October to 84% in January. On the rainfall front, fluctuations range from 0.67" (17mm) in February to 3.03" (77mm) from May to June.
Uniquely, the months with maximum rainfall coincide with the months experiencing highest temperatures—May through June. Additionally, months without any snowfall, June to September, align with this period of high temperatures too.
The best time to visit North Sioux City
Factoring in weather conditions such as temperature, humidity, and rainfall, the ideal period for visiting North Sioux City could be considered between May and June. Visitors during this period can anticipate average high temperatures from 69.4°F (20.8°C) to 79.9°F (26.6°C), and the relative humidity oscillates around 70% to 75%. Travelers can also expect rainfall measuring 3.03" (77mm), which could be refreshing amidst the high temperatures.The worst time to visit North Sioux City
The least favorable period to visit North Sioux City seems to be between December and February. During these months, average low temperatures dive down from 13.1°F (-10.5°C) to 16.7°F (-8.5°C). Additionally, relative humidity during this period ranges from 80% to 84%, contributing to the overall chill. Travelers need to be prepared for a snowfall measuring from 2.36" (60mm) to 2.96" (75mm) during these months.Spring weather in North Sioux City
Spring, observed from March to May in North Sioux City, witnesses a sharp rise in temperatures. Starting from a high of 46.6°F (8.1°C) in March, by May the mercury soars to a high of 69.4°F (20.8°C). The low temperatures show a similar upward trend, from 30.9°F (-0.6°C) in March to 52.2°F (11.2°C) in May. Spring is also the season with increasing rainfall, reaching its yearly high of 3.03" (77mm) in May.Summer weather in North Sioux City
Summer in North Sioux City extends from June to August. It is characterized by high temperatures with the average high ranging from 79.9°F (26.6°C) to 84°F (28.9°C) and the average low from 62.2°F (16.8°C) to 64.9°F (18.3°C). It's worth noting that this is also the period with highest rainfall alongside warmer temperatures. Sunshine hours are at their peak, with an average of 10.1 hours to 10.7 hours in a day.Autumn weather in North Sioux City
Autumn months, September to November, in North Sioux City carry a gradual fall in temperatures. The high averages move from 76.1°F (24.5°C) in September to 45.9°F (7.7°C) in November. Similarly, the low averages descend from 55°F (12.8°C) in September to 31.5°F (-0.3°C) in November. Rainfall recedes during this period, moving from 1.93" (49mm) in September to 0.79" (20mm) in November.Winter weather in North Sioux City
Winter in North Sioux City commences from December and lasts until February. This season is characterized by the lowest temperatures of the year, with highs ranging from 27°F (-2.8°C) to 30.7°F (-0.7°C) and lows from 13.1°F (-10.5°C) to 16.7°F (-8.5°C). This is also the period of maximum snowfall, with totals ranging from 2.36" (60mm) in February to 2.96" (75mm) in December.Weather in January
The first month of the year ushers in some cool temperatures in North Sioux City, South Dakota. Relative to December, January continues the trend of chill, with the mercury often staying below freezing point. Snowfall is expected, blanketing the city in a crisp, white layer. Weather in January »Weather in February
February, the last month of the winter in North Sioux City, is freezing cold month, with an average temperature fluctuating between 30.7°F (-0.7°C) and 16.7°F (-8.5°C). Transitioning into February, North Sioux City experiences an average high-temperature of a still subzero cold 30.7°F (-0.7°C), marking a minor shift from the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in North Sioux City, South Dakota, with temperature in the range of an average low of 30.9°F (-0.6°C) and an average high of 46.6°F (8.1°C). The beginning of March signals a clear escalation in the average high-temperature, soaring from a subzero cold 30.7°F (-0.7°C) in February to a frosty 46.6°F (8.1°C). Weather in March »Weather in April
April is a refreshing spring month in North Sioux City, South Dakota, with an average temperature fluctuating between 40.8°F (4.9°C) and 58.6°F (14.8°C). In April, the average high-temperature increases from a frosty 46.6°F (8.1°C) in March to a refreshing 58.6°F (14.8°C). Weather in April »Weather in May
May, the last month of the spring in North Sioux City, is an agreeable month, with an average temperature varying between 52.2°F (11.2°C) and 69.4°F (20.8°C). As May arrives, a rise in the average high-temperature is observed, moving from a moderate 58.6°F (14.8°C) in April to a pleasant 69.4°F (20.8°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in North Sioux City, South Dakota, with temperature in the range of an average low of 62.2°F (16.8°C) and an average high of 79.9°F (26.6°C). The shift from May to June brings an increase in the average high-temperature, moving from an agreeable 69.4°F (20.8°C) to a warm 79.9°F (26.6°C). Weather in June »Weather in July
The peak summer month of July in North Sioux City continues the trend of June, experiencing hot weather. July tends to be the warmest month of the year, preceding the somewhat cooler month of August. On summer's peak, the city experiences its longest days, filled with abundant sunshine. Weather in July »Weather in August
August in North Sioux City sees a slight scale back of the peak summer temperatures registered in July. Compared to September, however, August still reflects summer's warm grip. The heat of July gives way slightly, offering somewhat cooler days. Weather in August »Weather in September
September in North Sioux City signals the advent of autumn with temperatures beginning to fall compared to August. The cooler climate of October is hinted at throughout September, with temperatures slowly declining. Days start becoming shorter and cloud cover increases slightly. Weather in September »Weather in October
In October, North Sioux City witnesses a considerable decline in temperatures when compared to September, a trend that continues into November. This month is distinctly characterized by shorter daylight hours, clear skies, and crisp weather. Weather in October »Weather in November
November in North Sioux City marks the beginning of winter, with temperatures dropping significantly from October. The cool air of December can be felt in late November, although days are considerably shorter. Snow begins to fall again, adding to the city's festive feeling. Weather in November »Weather in December
December, the final month of the year in North Sioux City, is characterized by its cold temperatures and considerable snowfall. Building on the pattern started in November, December gets colder, promising a white Christmas. This trend continues into the following month, January, which is typically the year's coldest month. Weather in December »Updated: Feb 14, 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
The coldest period tends to be January, when average temperatures fluctuate between a high of 27°F (-2.8°C) and a low of 13.1°F (-10.5°C).
With an average relative humidity of 84%, January is the most humid month in North Sioux City.
Throughout the year, in North Sioux City, there are 122 rainfall days, and 21.61" (549mm) of precipitation is accumulated.
Months with snowfall are January through May, October through December.
January is the month with the most snowfall. Snow falls for 9.6 days and accumulates 2.95" (75mm) of snow.
In North Sioux City, during the entire year, snow falls for 38 days and aggregates up to 13.23" (336mm) of snow.
January has the least sunshine of the year in North Sioux City, South Dakota, with an average of 4.4h of sunshine.
With an average maximum UV index of 1, January is the month with the lowest UV index in North Sioux City, South Dakota.
The month with the least rainfall in North Sioux City, South Dakota, is February, when the rain falls for 3.3 days and typically collects 0.67" (17mm) of precipitation.
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.
The months with the most rainfall in North Sioux City, South Dakota, are May and June, with an average 3.03" (77mm) of precipitation.
June through September are months without snowfall in North Sioux City, South Dakota.
With an average of 15h and 18min of daylight, June has the longest days of the year in North Sioux City, South Dakota.
The months with the highest UV index in North Sioux City are June and July, with an average maximum UV index of 6.
The temperatures in North Sioux City, South Dakota, reach their highest averages in July, with highs of 84°F (28.9°C) and lows of 64.9°F (18.3°C).
July has the most sunshine of the year in North Sioux City, South Dakota, with an average of 10.7h of sunshine.
With an average relative humidity of 65%, October is the least humid month in North Sioux City, South Dakota.
December has the shortest days of the year in North Sioux City, South Dakota, with an average of 9h and 6min of daylight.
Average temperature
North Sioux City, SD
The warmest month (with the highest average high temperature) is July (84°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 (13.1°F).
Average pressure
North Sioux City, SD
- 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:
29.93"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:
29.98"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
North Sioux City, SD
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.7mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.4mph - Average wind speed in June:
8.7mph
- Average wind speed in July:
7.6mph - Average wind speed in August:
8mph - Average wind speed in September:
9mph - Average wind speed in October:
10.2mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10.2mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity
North Sioux City, SD
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).
Average rainfall
North Sioux City, SD
- Average rainfall in January:
0.75" - Average rainfall in February:
0.67" - Average rainfall in March:
1.69" - Average rainfall in April:
2.56" - Average rainfall in May:
3.03" - Average rainfall in June:
3.03"
- Average rainfall in July:
1.89" - Average rainfall in August:
2.2" - Average rainfall in September:
1.93" - Average rainfall in October:
1.85" - Average rainfall in November:
0.79" - Average rainfall in December:
1.22"
The wettest months (with the highest rainfall) are May and June (3.03").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days
North Sioux City, SD
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
16.2 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
12.7 days - Average rainfall days in August:
13.6 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
6.1 days - Average rainfall days in December:
4.1 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall
North Sioux City, SD
- Average snowfall in January:
2.95" - Average snowfall in February:
2.36" - Average snowfall in March:
2.48" - Average snowfall in April:
1.61" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
North Sioux City, SD
- Average snowfall days in January:
9.6 days - Average snowfall days in February:
8.3 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
2.1 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:
0.7 days - Average snowfall days in November:
3.4 days - Average snowfall days in December:
8.4 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
North Sioux City, SD
- 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 18min
- 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 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
4h and 24min - Average sunshine in February:
5h and 18min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 48min - 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 48min - 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 24min).
Average sunshine days
North Sioux City, SD
- Average sunshine days in January:
19.2 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
15.6 days - Average sunshine days in April:
13.6 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
9.7 days
- Average sunshine days in July:
15 days - Average sunshine days in August:
14.7 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
18.7 days - Average sunshine days in November:
20.9 days - Average sunshine days in December:
20.1 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (9.7 days).
Average UV index
North Sioux City, SD
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
North Sioux City, SD
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility
North Sioux City, SD
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).
