Climate and monthly weather forecastVermillion, SD
Climate and monthly weather forecast
The climate of Vermillion
Vermillion, South Dakota is situated within a climate zone categorised by the Köppen climate classification as Dfa. This implies a humid continental climate, with no dry season and a hot summer.The climate demonstrates distinct seasonal variations with temperatures reaching a peak in July at 84.4°F (29.1°C), while the mercury dips to its lowest in January, recording a frigid 12.9°F (-10.6°C). Hints of humidity continue throughout the year with the highest levels recorded from 73% to 84%.
Rainfall illustrates a progressive pattern, starting as a mere 0.63" (16mm) in January and February, subsequently escalating to hit a yearly high of 3.35" (85mm) in June, and thereafter plummeting again towards the end of the year. A somewhat similar pattern unfolds in the number of rainfall days, accruing to 17.3 days in June as the apex, and 2.8 days in January and February at the base.
A noteworthy aspect of Vermillion's climate is its heavy snowfall, peaking at 2.83" (72mm) in January and retained until February. Interestingly, sunlight hours increase significantly from 9.5 hours in January to a grand 15.3 hours in June, dipping again to 9.1 hours in December.
The best time to visit Vermillion
An exploratory visit to Vermillion provides an optimal experience between May to September. During this period, the temperature ranges from a comfortable 69.1°F (20.6°C) to 82.4°F (28°C), and the area enjoys longer daylight hours - spanning between 14.7 to 15.3 hours. The UV index is at its annual peak, ranging from 5 to 6, facilitating outdoor activities under the sun.The worst time to visit Vermillion
Travelers might want to avoid planning a visit during the freezing months from November to March. The temperature nosedives to the bitter range of 12.9°F (-10.6°C) to 30.6°F (-0.8°C). Moreover, the daylight duration is at its annual low, oscillating around 9.5 to 12 hours.Spring weather in Vermillion
Spring ushers in a transition from the piercing chilly winds to a milder climate. Temperatures show an upward trend, moving from 30.6°F (-0.8°C) to 57.7°F (14.3°C) between March to May. Concurrently, the daylight hours increase from 12 to 14.7 hours. However, with the arrival of spring, the rainfall inches upward as well, surging from 1.5" (38mm) to a relatively high 3.23" (82mm).Summer weather in Vermillion
Summer in Vermillion extends from June to August, characterized by high temperatures oscillating from 79.7°F (26.5°C) to 84.4°F (29.1°C). It also brings the longest daytime duration, from 15 to 15.3 hours, and a significant increase in UV index, remaining steady at 6. Rainfall remains considerably high in comparison to other seasons, oscillating around 1.89 to 3.35" (85mm).Autumn weather in Vermillion
Autumn witnesses a temperature drop from 76.1°F (24.5°C) in September to a cooler 45.9°F (7.7°C) by November. Also, daylight hours reduce progressively from 12.5 to 9.8 hours. While the autumn rainfall tapers down to 1.69" (43mm) in October, the number of rainfall days exhibit a contrasting trend, reducing to 8.8 days in the same month.Winter weather in Vermillion
Winter in Vermillion is marked by its frigid temperatures, with December recording 30°F (-1.1°C), reducing further to 12.9°F (-10.6°C) by January. The shortest days occur during this period, with daylight hours sinking to a yearly low of 9.1 hours in December. Meanwhile, the season makes its mark with snowfall amassing to 1.22" (31mm) in November, reaching a peak of 2.83" (72mm) in January.Weather in January
When comparing January to the other winter months, it stands out as the coldest, plus it's a period of increased snowfall in Vermillion, South Dakota. From the temperature highs of 26.8°F (-2.9°C) to lows of 12.9°F (-10.6°C), January weather exhibits an icy grip on the city. Weather in January »Weather in February
February marks the conclusion of winter's worst, offering just a slight relief as the weather inches towards a less harsh outlook. The temperatures do rise subtly, yet stay rigidly cold, keeping Vermillion's landscape as a winter wonderland. Weather in February »Weather in March
March in Vermillion, South Dakota, signals the start of unpredictable Springtime weather. The slight elevation in temperature brings a bit of a thaw, transforming fluffy snow into rain-soaked scenes. As the snowfall reduces to 2.4" (61mm), the weather oscillates uncomfortably between frosty winter remnants and the incoming temperate springtime. Weather in March »Weather in April
April embodies the true spirit of Spring in Vermillion, as the weather continually warms, coaxing the winter-weary city back to life. There's a significant reduction in snowfall, while rainfall begins to dominate, signaling the onset of the growing season. Weather in April »Weather in May
May sees Vermillion truly embracing Spring, as temperatures rise consistently, making way for a far warmer month. The city witnesses its transformation with budding trees, warmth-encouraging high sunshine hours, reinforcing the city’s transition into a full-swing Spring. Weather in May »Weather in June
June ushers in the first taste of Summer in Vermillion, as temperatures continue to rise, reaching up to 79.7°F (26.5°C) at their peak. Residents must adapt to these warmer conditions, with June being traditionally one of the most humid months. Weather in June »Weather in July
July represents the height of summer in Vermillion, providing the warmest weather experience of the year. Maximum sunlight hours and minimum cloud cover result in increased UV index levels, requiring proper sun protection for those venturing outdoors. Weather in July »Weather in August
As August rolls in, the peak summer heat begins to ease off in Vermillion. The weather remains predominantly warm, with a noticeably higher humidity level than the previous months. Residents usually plan their outdoors around the high UV index, indicating that the sun is still potent despite the slight reduction in temperature. Weather in August »Weather in September
Vermillion in September stands on the brink of transition, sliding gently from the remaining summer heat into the arms of Fall. Cooler temperature highs become frequent, reshaping the weather towards the Fall season. Cloud cover begins to increase, shadowing the golden summer sunshine and resulting in shorter daylight hours. Weather in September »Weather in October
October in Vermillion witnesses the complete transformation into Fall weather, where the trees don coats of warm-hued foliage. A remarkable autumnal shift ensues, with shorter daylight hours, cooler temperatures, and an increase in wind speeds. Weather in October »Weather in November
November observes Vermillion fully embracing late Fall, with a noticeable dip in the temperatures. The marked change in the weather cleaves the link to the remaining autumn months and leans towards winter. The city witnesses more snowfall, with around 1.22" (31mm) of snow depositing a thin, icy layer over the city. Weather in November »Weather in December
December brings the return of winter to Vermillion, and with it, the return of colder temperatures and snow-laden sceneries. The winter solstice arrives mid-month, marking the shortest daylight hour of the year. The city becomes a canvas for new snowfalls, introducing a period of minimal rainfall and an increase in ice and frost. Weather in December »Updated: Aug 3, 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
Temperature records mark January as the coldest month, with highs averaging 26.8°F (-2.9°C) and lows at 12.9°F (-10.6°C).
January is the most humid month, with an average relative humidity of 84%.
The months with the least rainfall are January and February Rain falls for 2.8 days and accumulates 0.63" (16mm) of rain.
Throughout the year, there are 116.6 rainfall days, and 21.26" (540mm) of precipitation is accumulated.
January through May, October through December are months with snowfall.
The months with the most snowfall are January and February, with an average 2.83" (72mm) of accumulated snow.
In Vermillion, during the entire year, snow falls for 30.7 days and aggregates up to 13.9" (353mm) of snow.
January has the least sunshine of the year, with an average of 4.5h of sunshine.
With an average maximum UV index of 1, January is the month with the lowest UV index.
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 month with the most rainfall is June, when the rain falls for 17.3 days and typically aggregates up to 3.35" (85mm) of precipitation.
In Vermillion, snow does not fall in June through September.
With an average of 15h and 18min of daylight, June has the longest days of the year.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
Vermillion experiences its highest temperatures in July, with an average peak of 84.4°F (29.1°C) and a low of 64.9°F (18.3°C).
With an average of 10.9h of sunshine, July has the most sunshine of the year.
The least humid month is October, 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
Vermillion, SD
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (26.8°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 (12.9°F).
Average pressure
Vermillion, 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:
29.85"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.94"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
29.99"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 (29.85"Hg).
Average wind speed
Vermillion, SD
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.8mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.4mph - Average wind speed in June:
8.8mph
- Average wind speed in July:
7.8mph - Average wind speed in August:
8.1mph - Average wind speed in September:
9.1mph - Average wind speed in October:
10.3mph - 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 (7.8mph).
Average humidity
Vermillion, SD
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).
Average rainfall
Vermillion, SD
- Average rainfall in January:
0.63" - Average rainfall in February:
0.63" - Average rainfall in March:
1.5" - Average rainfall in April:
2.36" - Average rainfall in May:
3.23" - Average rainfall in June:
3.35"
- Average rainfall in July:
1.89" - Average rainfall in August:
2.24" - Average rainfall in September:
1.85" - Average rainfall in October:
1.69" - Average rainfall in November:
0.67" - Average rainfall in December:
1.22"
The wettest month (with the highest rainfall) is June (3.35").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days
Vermillion, SD
- Average rainfall days in January:
2.8 days - Average rainfall days in February:
2.8 days - Average rainfall days in March:
9 days - Average rainfall days in April:
13.1 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
12.6 days - Average rainfall days in August:
13.7 days - Average rainfall days in September:
10.7 days - Average rainfall days in October:
8.8 days - Average rainfall days in November:
5.8 days - Average rainfall days in December:
3.5 days
The month with the highest number of rainy days is June (17.3 days).
The months with the least rainy days are January and February (2.8 days).
Average snowfall
Vermillion, SD
The months with the highest snowfall are January and February (2.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Vermillion, SD
- Average snowfall days in January:
6.5 days - Average snowfall days in February:
7.1 days - Average snowfall days in March:
4.8 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:
0.8 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
6.6 days
The month with the highest number of snowfall days is February (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Vermillion, 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 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - 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 30min - Average sunshine in February:
5h and 24min - 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 12min
- Average sunshine in July:
10h and 54min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 54min - Average sunshine in October:
6h and 12min - Average sunshine in November:
6h and 0min - Average sunshine in December:
4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days
Vermillion, SD
- Average sunshine days in January:
22.2 days - Average sunshine days in February:
18.8 days - Average sunshine days in March:
17.2 days - Average sunshine days in April:
13.7 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
15.8 days - Average sunshine days in August:
15.1 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
19.8 days - Average sunshine days in November:
21.8 days - Average sunshine days in December:
21.6 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is June (10.3 days).
Average UV index
Vermillion, SD
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Vermillion, SD
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
Vermillion, 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).
