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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Mount Vernon, South Dakota, is another subzero cold winter month, with an average temperature varying between 10.2°F (-12.1°C) and 24.4°F (-4.2°C). January, with an average high of 24.4°F (-4.2°C) and a low of 10.2°F (-12.1°C), signifies the coldest month of the year. Weather in January »
Weather in February
February, the last month of the winter in Mount Vernon, is another freezing cold month, with an average temperature varying between 14.2°F (-9.9°C) and 28.6°F (-1.9°C). The advent of February brings an average high-temperature of a still subzero cold 28.6°F (-1.9°C), almost identical to the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Mount Vernon, is a frosty month, with an average temperature varying between 44.4°F (6.9°C) and 27.9°F (-2.3°C). The shift into March is characterized by a noticeable escalation in the average high-temperature, rising from February's subzero cold 28.6°F (-1.9°C) to a frosty 44.4°F (6.9°C). Weather in March »
Weather in April
April in Mount Vernon, South Dakota, is a refreshing spring month, with an average temperature ranging between min 38.8°F (3.8°C) and max 56.8°F (13.8°C). As Mount Vernon transitions into April, the average high-temperature is observed to rise from a frosty 44.4°F (6.9°C) in March to a moderate 56.8°F (13.8°C). Weather in April »
Weather in May
May, the last month of the spring in Mount Vernon, is a pleasant month, with an average temperature ranging between min 50°F (10°C) and max 68.4°F (20.2°C). As Mount Vernon welcomes May, the average high-temperature sees a rise, transitioning from a refreshing 56.8°F (13.8°C) in April to an agreeable 68.4°F (20.2°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Mount Vernon, South Dakota, with temperature in the range of an average high of 79°F (26.1°C) and an average low of 60.3°F (15.7°C). June sees a temperature increase, moving from an agreeable 68.4°F (20.2°C) in May to a warm 79°F (26.1°C). Weather in June »
Weather in July
July, like June, in Mount Vernon, South Dakota, is another warm summer month, with an average temperature fluctuating between 85.6°F (29.8°C) and 64.6°F (18.1°C). July, characterized by an average high temperature of 85.6°F (29.8°C) and a low temperature of 64.6°F (18.1°C), is generally the warmest month. The heat index for July is evaluated at a tropical 93.2°F (34°C). Weather in July »
Weather in August
August, the last month of the summer in Mount Vernon, is another warm month, with an average temperature fluctuating between 84.4°F (29.1°C) and 62.1°F (16.7°C). Mount Vernon experiences a subtle adjustment in high-temperatures to a still moderately hot 84.4°F (29.1°C) with the onset of August, maintaining near parity with July's 85.6°F (29.8°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Mount Vernon, South Dakota, with an average temperature ranging between min 55°F (12.8°C) and max 76.1°F (24.5°C). September's arrival signals a moderate reduction in the average high-temperature, easing from 84.4°F (29.1°C) in August to a still warm 76.1°F (24.5°C). Weather in September »
Weather in October
October, the same as September, in Mount Vernon, South Dakota, is another mild autumn month, with temperature in the range of an average high of 58.5°F (14.7°C) and an average low of 42.1°F (5.6°C). Witnessing a clear downswing, the average high-temperature during October drops from September's moderately hot 76.1°F (24.5°C) to a refreshing 58.5°F (14.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Mount Vernon, South Dakota, with an average temperature ranging between max 45°F (7.2°C) and min 29.5°F (-1.4°C). November brings a decrease in the average high-temperature, falling from October's refreshing 58.5°F (14.7°C) to a frosty 45°F (7.2°C). Weather in November »
Weather in December
The first month of the winter, December, is still a freezing cold month in Mount Vernon, South Dakota, with an average temperature ranging between min 16°F (-8.9°C) and max 28.6°F (-1.9°C). The shift into December is marked by a considerable temperature decrease, with the average high-temperature dropping from a chilly 45°F (7.2°C) in November to a subzero cold 28.6°F (-1.9°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Mount Vernon?
The coldest period in Mount Vernon is January, when temperatures fluctuate between an average high of 24.4°F (-4.2°C) and a low of 10.2°F (-12.1°C).
What is the most humid month in Mount Vernon?
The most humid month in Mount Vernon, South Dakota, is January, with an average relative humidity of 87%.
How many days does it rain in Mount Vernon?
Throughout the year, in Mount Vernon, South Dakota, there are 93.2 rainfall days, and 11.3" (287mm) of precipitation is accumulated.
When does it snow in Mount Vernon?
January through April, October through December are months with snowfall.
How many days does it snow in Mount Vernon?
Throughout the year, in Mount Vernon, South Dakota, there are 35.3 snowfall days, and 7.17" (182mm) of snow is accumulated.
What is the month with the least sunshine in Mount Vernon?
January has the least sunshine of the year, with an average of 4.4h of sunshine.
When is the lowest UV index in Mount Vernon?
The month with the lowest UV index in Mount Vernon, South Dakota, is January, with an average maximum UV index of 1.
What is the driest month in Mount Vernon?
The months with the least rainfall in Mount Vernon, South Dakota, are February and November Rain falls for 1.9 days and accumulates 0.28" (7mm) of rain.
What is the snowiest month in Mount Vernon?
The month with the most snowfall is February, when snow falls for 7.3 days and typically aggregates up to 1.42" (36mm) of snow.
When is Daylight Saving Time (DST) in Mount Vernon?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Mount Vernon, South Dakota, 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.
What is the wettest month in Mount Vernon?
The month with the most rainfall is May, when the rain falls for 13.5 days and typically aggregates up to 1.65" (42mm) of precipitation.
When it does not snow in Mount Vernon?
May through September are months without snowfall in Mount Vernon, South Dakota.
When are the longest days in Mount Vernon?
June has the longest days of the year in Mount Vernon, South Dakota, with an average of 15h and 24min of daylight.
When is the highest UV index in Mount Vernon?
The months with the highest UV index in Mount Vernon are June through August, with an average maximum UV index of 6.
What part of the year is the hottest in Mount Vernon?
July registers as the month with the average highest temperatures, reaching 85.6°F (29.8°C) at its peak and 64.6°F (18.1°C) at the lowest.
What month has the most sunshine in Mount Vernon?
The month with the most sunshine is July, with an average of 11.1h of sunshine.
What are the least humid months in Mount Vernon?
September and October, with an average relative humidity of 63%, are the least humid months.
What is the month with the shortest days in Mount Vernon?
December has the shortest days of the year, with an average of 9h and 0min of daylight.
Average temperature
Mount Vernon, SD
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (24.4°F).
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (10.2°F).
Average pressure
Mount Vernon, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.16"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:
29.91"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.13"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed
Mount Vernon, SD
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.7mph - Average wind speed in April:
11.2mph - Average wind speed in May:
9.8mph - Average wind speed in June:
9.2mph
- Average wind speed in July:
8.6mph - Average wind speed in August:
8.7mph - Average wind speed in September:
9.7mph - Average wind speed in October:
10.6mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (8.6mph).
Average humidity
Mount Vernon, SD
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are September and October (63%).
Average rainfall
Mount Vernon, SD
- Average rainfall in January:
0.31" - Average rainfall in February:
0.28" - Average rainfall in March:
0.83" - Average rainfall in April:
1.18" - Average rainfall in May:
1.65" - Average rainfall in June:
1.61"
- Average rainfall in July:
1.54" - Average rainfall in August:
1.14" - Average rainfall in September:
1.18" - Average rainfall in October:
0.79" - Average rainfall in November:
0.28" - Average rainfall in December:
0.51"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are February and November (0.28").
Average rainfall days
Mount Vernon, SD
- Average rainfall days in January:
2.6 days - Average rainfall days in February:
1.9 days - Average rainfall days in March:
7.2 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
13.5 days - Average rainfall days in June:
13.6 days
- Average rainfall days in July:
10.5 days - Average rainfall days in August:
10.5 days - Average rainfall days in September:
9.2 days - Average rainfall days in October:
6.8 days - Average rainfall days in November:
3.2 days - Average rainfall days in December:
2.9 days
The month with the highest number of rainy days is June (13.6 days).
The month with the least rainy days is February (1.9 days).
Average snowfall
Mount Vernon, SD
The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Mount Vernon, SD
- Average snowfall days in January:
8.7 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
5.4 days - Average snowfall days in April:
2.6 days - Average snowfall days in May:
0.1 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:
0.9 days - Average snowfall days in November:
2.8 days - Average snowfall days in December:
7.5 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Mount Vernon, SD
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 1min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
5h and 2min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 0min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
10h and 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 3min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Mount Vernon, SD
- Average sunshine days in January:
21.6 days - Average sunshine days in February:
19.8 days - Average sunshine days in March:
18.3 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
14 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
17.8 days - Average sunshine days in August:
17.3 days - Average sunshine days in September:
18.3 days - Average sunshine days in October:
22 days - Average sunshine days in November:
23.4 days - Average sunshine days in December:
21.9 days
The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is June (12.8 days).
Average UV index
Mount Vernon, 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
Mount Vernon, SD
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 22).
Average visibility
Mount Vernon, 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).
Mount Vernon, South Dakota, USA
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