Climate and monthly weather forecastSisseton, SD
Climate and monthly weather forecast
The climate of Sisseton
Sisseton, South Dakota, falls under the Dfb category of the Köppen climate classification, defined as a humid continental climate with no dry season and warm summers. This classification is attributable to its geographical position in the Midwestern region of the United States. Throughout the year, the climate exhibits vast fluctuations in temperature, precipitation, and other climatic features, leading to pronounced seasonal changes typical of a humid continental climate.Temperature varies considerably, with the highest average daytime temperature observed at 81.1°F (27.3°C) in July, steadily falling to the coldest month of January with a high temperature of just 19°F (-7.2°C). Nighttime temperatures also exhibit a significant range, from a high of 61.7°F (16.5°C) in July down to a low of 5.4°F (-14.8°C) in January.
Relative humidity trends downward from 89% in January to 65% in September before edging upward again, ending the year at 86% in December. The distribution of rainfall follows a unique pattern, reaching its peak in June with 3.27" (83mm), and bottoming out at 0.55" (14mm) in January. Snowfall is primarily observed from November to April, peaking at 4.29" (109mm) in December. Wind speed also presents variable metrics, with the fastest on average from 10.3mph (16.6km/h) in March to 10.9mph (17.5km/h) in November.
The best time to visit Sisseton
Considering the variable weather scenario, the best time to visit Sisseton would primarily hinge on the planned activities and weather preferences of the visitors. For those desiring a fair amount of sunshine and mild temperatures, May to September may be the ideal window, with average high temperatures swinging from 65.1°F (18.4°C) to a warm 81.1°F (27.3°C) and minimal snowfall. The relative humidity during these months also tends to be lower, ranging from 68% to 77%. This period also enjoys the longest daylight hours - from 14.9 hours in May to 14.1 hours in September - providing ample time for outdoor explorations.The worst time to visit Sisseton
Contrarily, the coldest months of December, January, and February may prove to be challenging for travel. Daytime temperatures plummet to between 19°F (-7.2°C) and 37.8°F (3.2°C), with nighttime temperatures falling even lower, from 12.6°F (-10.8°C) to 23.4°F (-4.8°C), making it uncomfortable for outdoor activities. These winter months also witness increased snowfall, from 2.6" (66mm) in November escalating to 4.29" (109mm) in December. The shorter daylight hours, between 8.8 hours and 10.4 hours, coupled with reduced visibility because of snowfall, would restrict travel and sightseeing during this period.Spring weather in Sisseton
Springtime in Sisseton, spanning March to May, exhibits an upward trajectory in temperatures, kicking off at 37.8°F (3.2°C) in March and reaching a comfortable 65.1°F (18.4°C) in May. Simultaneously, the night temperature also shows a steady rise from 23.4°F (-4.8°C) to 48°F (8.9°C). One can expect an escalation of rainfall in spring, commencing at 1.18" (30mm) in March and culminating at 2.48" (63mm) in May. Snowfall primarily occurs in March, with an average of 3.35" (85mm), but fades out by May.Summer weather in Sisseton
Summers, from June to August, range from warm to hot, with the peak temperature observed at 81.1°F (27.3°C) in July. Nighttime temperatures are also on the higher side, standing at 57°F (13.9°C) in June to 61.7°F (16.5°C) in July. Rainfall reaches its zenith, with June receiving the heaviest downpour of the year, averaging 3.27" (83mm). Summer is also the season with the most extended daylight hours, indicative of longer days and shorter nights.Autumn weather in Sisseton
Autumn, comprising the months of September to November, sees a downslide in temperatures, with highs decreasing from 72°F (22.2°C) in September to 39.6°F (4.2°C) in November. A parallel drop is observable in nighttime temperatures, slipping from 52°F (11.1°C) to 26.8°F (-2.9°C). Rainfall reduces considerably in autumn, from 1.73" (44mm) in September to 0.75" (19mm) in November. Along with falling temperatures, the daylight hours also decrease, from 12.5 hours in September to 9.5 hours in November.Winter weather in Sisseton
Winters, from December till February, are characterized by cold temperatures, with daytime highs oscillating between 19°F (-7.2°C) and 37.8°F (3.2°C). Night temperatures can drop significantly, ranging from 12.6°F (-10.8°C) to 23.4°F (-4.8°C), making these months the coldest of the year. An average snowfall from 2.6" (66mm) to 4.29" (109mm) is noted during this period, with the heaviest snowfall in December. Additionally, the daylight hours are shortest in winter, ranging from 8.8 hours in December to 10.4 hours in February.Weather in January
In Sisseton, South Dakota, January sees temperatures dropping to their most frigid. The weather conditions often present challenges with a pronounced dip in high temperatures to 19°F (-7.2°C), low temperatures making a freeze through at 5.4°F (-14.8°C). Weather in January »Weather in February
In February, Sisseton experiences a slight improvement in temperatures. It's the last of the sub-freezing months with low temperatures of 8.1°F (-13.3°C) and high temperatures of 21.6°F (-5.8°C). Precipitation dips slightly compared to January, making for drier conditions. Weather in February »Weather in March
March signals the onset of Spring in Sisseton with temperatures rising noticeably compared to February. High temperatures climb to 37.8°F (3.2°C), and lows advance to 23.4°F (-4.8°C), bidding goodbye to the bitter chill of winter. Weather in March »Weather in April
April brings warmer weather to Sisseton with a distinctive shift from the cold, harsh winter months. The transition is evident with occasional showers replacing the snowy landscape of prior months. Towards the end of this month, the rain gives way to a greener landscape springing to life. Weather in April »Weather in May
In Sisseton, May welcomes further warmth with high temperatures soaring to 65.1°F (18.4°C) and low temperatures hovering around 48°F (8.9°C). This significant increase allows for a broad range of outdoor activities as citizens joyfully greet sunny and warm weather. Weather in May »Weather in June
June is the first month of the year in Sisseton to showcase summer-like temperatures. The highs sweltering at 74.8°F (23.8°C) and the lows settle comfortably at 57°F (13.9°C). The rainfall for June reaches peak levels for the year, with June often being the wettest month. Weather in June »Weather in July
July can be designated as the peak of summer in Sisseton. With the highest temperatures of the year, peaking at 81.1°F (27.3°C) and lows settling at a comfortable 61.7°F (16.5°C), summer truly shines. These temperatures combine with low precipitation levels compared to June to create ideal conditions for outdoor ventures. Weather in July »Weather in August
In Sisseton, the weather in August mirrors that of July with similar temperature patterns. Daylight hours shorten slightly compared to July, signaling the imminent arrival of autumn. Despite this, the weather remains warm enough to still enjoy outdoor activities and explore Sisseton's summer landscape. Weather in August »Weather in September
September ushers in the beginning of Autumn in Sisseton. Pleasant temperatures, a noticeable decrease in rainfall, and consistent wind speed make this one of the optimum months to visit. This time welcomes fall foliage, transforming the city into a scene of vibrant colors. Weather in September »Weather in October
October, in Sisseton, sees a noticeable decline in temperature. While temperatures in September remain relatively warm, October sees a sharp change. The city picks up on the mist-covered mornings and limited daylight hours. However, as the rain begins to fall less frequently, locals can enjoy the autumn colors in full display. Weather in October »Weather in November
In November, Sisseton braces itself for the cusp of winter. Compared to October, temperatures fall further with an average high of 39.6°F (4.2°C) and low of 26.8°F (-2.9°C). The season's change makes this month one of the cloudiest of the year. Weather in November »Weather in December
December, in Sisseton, is evidently a winter month, characterized by frigid temperatures, notably dropping from November. The highs barely climb to 23.5°F (-4.7°C) and lows plummet to 12.6°F (-10.8°C). Resurgent snowfall heralds a return to white landscapes, while a high relative humidity adds to the frosty feel of the season. 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
January, on average, is the coldest month in Sisseton, registering a high temperature of 19°F (-7.2°C) and a low of 5.4°F (-14.8°C).
With an average relative humidity of 89%, January is the most humid month in Sisseton, South Dakota.
January is the month with the least rainfall in Sisseton, South Dakota. Rain falls for 2.2 days and accumulates 0.55" (14mm) of precipitation.
Throughout the year, in Sisseton, there are 107.9 rainfall days, and 20.63" (524mm) of precipitation is accumulated.
Months with snowfall in Sisseton, South Dakota, are January through May, October through December.
In Sisseton, during the entire year, snow falls for 53.2 days and aggregates up to 20.12" (511mm) of snow.
January has the least sunshine of the year in Sisseton, with an average of 3.7h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Sisseton, 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.
June through September are months without snowfall.
June has the longest days of the year in Sisseton, South Dakota, with an average of 15h and 36min of daylight.
June and July, with an average maximum UV index of 6, are months with the highest UV index.
The warmest month in Sisseton is July, with an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 61.7°F (16.5°C).
July is the month with the most rainfall. Rain falls for 13.6 days and accumulates 3.27" (83mm) of precipitation.
The month with the most sunshine in Sisseton is July, with an average of 10.8h of sunshine.
The least humid month is September, with an average relative humidity of 65%.
The month with the most snowfall in Sisseton is December, when snow falls for 11.5 days and typically aggregates up to 4.29" (109mm) of snow.
With an average of 8h and 48min of daylight, December has the shortest days of the year in Sisseton.
The month with the lowest UV index in Sisseton is December, with an average maximum UV index of 1.
Average temperature
Sisseton, SD
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (19°F).
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure
Sisseton, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.17"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.86"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
29.97"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed
Sisseton, SD
- Average wind speed in January:
10.8mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.9mph - Average wind speed in June:
8.9mph
- Average wind speed in July:
8.3mph - Average wind speed in August:
8.3mph - Average wind speed in September:
9.6mph - Average wind speed in October:
10.9mph - Average wind speed in November:
10.7mph - Average wind speed in December:
10.7mph
The windiest months (with the highest average wind speed) are April and October (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.3mph).
Average humidity
Sisseton, SD
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is September (65%).
Average rainfall
Sisseton, SD
- Average rainfall in January:
0.55" - Average rainfall in February:
0.59" - Average rainfall in March:
1.18" - Average rainfall in April:
1.77" - Average rainfall in May:
2.48" - Average rainfall in June:
3.23"
- Average rainfall in July:
3.27" - Average rainfall in August:
2.01" - Average rainfall in September:
1.73" - Average rainfall in October:
2.13" - Average rainfall in November:
0.75" - Average rainfall in December:
0.94"
The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days
Sisseton, SD
- Average rainfall days in January:
2.2 days - Average rainfall days in February:
1.6 days - Average rainfall days in March:
8.1 days - Average rainfall days in April:
11 days - Average rainfall days in May:
14.8 days - Average rainfall days in June:
17.6 days
- Average rainfall days in July:
13.6 days - Average rainfall days in August:
11.8 days - Average rainfall days in September:
9.9 days - Average rainfall days in October:
8.9 days - Average rainfall days in November:
5 days - Average rainfall days in December:
3.4 days
The month with the highest number of rainy days is June (17.6 days).
The month with the least rainy days is February (1.6 days).
Average snowfall
Sisseton, SD
- Average snowfall in January:
3.5" - Average snowfall in February:
3.78" - Average snowfall in March:
3.35" - Average snowfall in April:
2.17" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is December (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Sisseton, SD
- Average snowfall days in January:
11 days - Average snowfall days in February:
10.3 days - Average snowfall days in March:
8.6 days - Average snowfall days in April:
4.1 days - Average snowfall days in May:
0.3 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:
1.4 days - Average snowfall days in November:
6 days - Average snowfall days in December:
11.5 days
The month with the highest number of snowfall days is December (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Sisseton, SD
- Average daylight in January:
9h and 12min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 36min
- Average daylight in July:
15h and 18min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 30min - Average daylight in December:
8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
3h and 42min - Average sunshine in February:
4h and 12min - Average sunshine in March:
5h and 30min - Average sunshine in April:
7h and 24min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 48min - Average sunshine in August:
10h and 30min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Sisseton, SD
- Average sunshine days in January:
17.4 days - Average sunshine days in February:
17 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
13.8 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
15.3 days - Average sunshine days in August:
16.2 days - Average sunshine days in September:
17.7 days - Average sunshine days in October:
19.1 days - Average sunshine days in November:
19.7 days - Average sunshine days in December:
17.6 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (10.8 days).
Average UV index
Sisseton, SD
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Sisseton, SD
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 25).
Average visibility
Sisseton, 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).
