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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, like December, is another subzero cold winter month in Summerville, South Dakota, with an average temperature ranging between max 25.2°F (-3.8°C) and min 11.7°F (-11.3°C). January stands out as Summerville's coldest month, with an average high-temperature of 25.2°F (-3.8°C) and a low-temperature of 11.7°F (-11.3°C). Weather in January »
Weather in February
February, the last month of the winter in Summerville, is also a subzero cold month, with temperature in the range of an average high of 26.8°F (-2.9°C) and an average low of 13.5°F (-10.3°C). The dawn of February sees an average high-temperature of a still subzero cold 26.8°F (-2.9°C), subtly contrasting with January's 25.2°F (-3.8°C). Weather in February »
Weather in March
March, the first month of the spring in Summerville, is a wintry month, with temperature in the range of an average high of 41.4°F (5.2°C) and an average low of 26.1°F (-3.3°C). March is characterized by a noticeable escalation in the average high-temperature, rising from a subzero cold 26.8°F (-2.9°C) in February to a wintry 41.4°F (5.2°C). Weather in March »
Weather in April
April in Summerville, South Dakota, is a fresh spring month, with an average temperature fluctuating between 35.2°F (1.8°C) and 52.3°F (11.3°C). As April arrives, a rise in the average high-temperature is observed, moving from an icy 41.4°F (5.2°C) in March to a fresh 52.3°F (11.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a comfortable month in Summerville, South Dakota, with an average temperature fluctuating between 64.9°F (18.3°C) and 46.2°F (7.9°C). May brings an increase in the average high-temperature, progressing from a cool 52.3°F (11.3°C) in April to a comfortable 64.9°F (18.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Summerville, South Dakota, with an average temperature varying between 76.3°F (24.6°C) and 56.3°F (13.5°C). As May gives way to June, the average high-temperature displays an increase, moving from a refreshing 64.9°F (18.3°C) to a moderately hot 76.3°F (24.6°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Summerville, South Dakota, with temperature in the range of an average low of 63.1°F (17.3°C) and an average high of 84.7°F (29.3°C). Summerville experiences its highest average temperatures in July, reaching a peak of 84.7°F (29.3°C) and a minimum of 63.1°F (17.3°C). In July, the average heat index is appraised at a tropical 86°F (30°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Summerville, South Dakota, with an average temperature fluctuating between 61.9°F (16.6°C) and 82.6°F (28.1°C). Summerville experiences a recorded average high-temperature of a still moderately hot 82.6°F (28.1°C) in August, closely aligned with July's 84.7°F (29.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Summerville, South Dakota, with temperature in the range of an average high of 73°F (22.8°C) and an average low of 54°F (12.2°C). In Summerville, the average high-temperature in September drops from a warm 82.6°F (28.1°C) in August to an agreeable 73°F (22.8°C). Weather in September »
Weather in October
October, the same as September, is another fresh autumn month in Summerville, South Dakota, with an average temperature varying between 54.7°F (12.6°C) and 39.4°F (4.1°C). Summerville in October showcases a distinct temperature shift, moving from an average high of an agreeable 73°F (22.8°C) in September to a fresh 54.7°F (12.6°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cold month in Summerville, South Dakota, with an average temperature fluctuating between 27.5°F (-2.5°C) and 41.2°F (5.1°C). November brings a decrease in the average high-temperature, shifting from a cool 54.7°F (12.6°C) in October to a wintry 41.2°F (5.1°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Summerville, South Dakota, with an average temperature fluctuating between 14.4°F (-9.8°C) and 25.9°F (-3.4°C). A clear decrease in the average high-temperature is observed during December, decreasing from a wintry 41.2°F (5.1°C) in November to a freezing cold 25.9°F (-3.4°C). Weather in December »
Updated: Jul 9, 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
What is the coldest time of year?
January, on average, is the coldest month, registering a high temperature of 25.2°F (-3.8°C) and a low of 11.7°F (-11.3°C).
What is the most humid month?
January is the most humid month, with an average relative humidity of 85%.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 2.9 days and typically collects 0.47" (12mm) of precipitation.
How much does it rain?
In Summerville, during the entire year, the rain falls for 101.3 days and collects up to 14.25" (362mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
How many days does it snow?
In Summerville, during the entire year, snow falls for 65.8 days and aggregates up to 21.42" (544mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4.6h of sunshine.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 12.9 days and accumulates 4.53" (115mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Summerville, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
What is the wettest month?
June is the month with the most rainfall. Rain falls for 15.1 days and accumulates 2.28" (58mm) of precipitation.
When it does not snow?
In Summerville, snow does not fall in June through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 42min of daylight.
What is the month with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What time of the year is the hottest?
July is Summerville's warmest month, registering average high temperatures of 84.7°F (29.3°C) and lows of 63.1°F (17.3°C).
What is the least humid month?
August and September, with an average relative humidity of 51%, are the least humid months.
What month has the most sunshine?
With an average of 11.5h of sunshine, August has the most sunshine of the year.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 8h and 42min of daylight.
When is the lowest UV index?
With an average maximum UV index of 1, December is the month with the lowest UV index.
Average temperature
Summerville, SD
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (25.2°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure
Summerville, SD
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.16"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.84"Hg
- Average pressure in July:
29.9"Hg - Average pressure in August:
29.9"Hg - Average pressure in September:
29.94"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed
Summerville, SD
- Average wind speed in January:
11.4mph - Average wind speed in February:
10.2mph - Average wind speed in March:
10.9mph - Average wind speed in April:
11.7mph - Average wind speed in May:
11mph - Average wind speed in June:
10.5mph
- Average wind speed in July:
9.7mph - Average wind speed in August:
9.6mph - Average wind speed in September:
10.7mph - Average wind speed in October:
11.6mph - Average wind speed in November:
10.9mph - Average wind speed in December:
10.9mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (9.6mph).
Average humidity
Summerville, SD
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are August and September (51%).
Average rainfall
Summerville, SD
- Average rainfall in January:
0.47" - Average rainfall in February:
0.67" - Average rainfall in March:
0.91" - Average rainfall in April:
1.38" - Average rainfall in May:
2.2" - Average rainfall in June:
2.28"
- Average rainfall in July:
1.65" - Average rainfall in August:
1.34" - Average rainfall in September:
1.02" - Average rainfall in October:
1.26" - Average rainfall in November:
0.51" - Average rainfall in December:
0.55"
The wettest month (with the highest rainfall) is June (2.28").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days
Summerville, SD
- Average rainfall days in January:
2.9 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
6.7 days - Average rainfall days in April:
11.9 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
15.1 days
- Average rainfall days in July:
13.8 days - Average rainfall days in August:
11.3 days - Average rainfall days in September:
7.6 days - Average rainfall days in October:
7.5 days - Average rainfall days in November:
3.7 days - Average rainfall days in December:
3.7 days
The month with the highest number of rainy days is June (15.1 days).
The month with the least rainy days is January (2.9 days).
Average snowfall
Summerville, SD
- Average snowfall in January:
2.95" - Average snowfall in February:
4.53" - Average snowfall in March:
3.03" - Average snowfall in April:
3.15" - Average snowfall in May:
1.34" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Summerville, SD
- Average snowfall days in January:
12.8 days - Average snowfall days in February:
12.9 days - Average snowfall days in March:
9.8 days - Average snowfall days in April:
5.8 days - Average snowfall days in May:
1.4 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:
3.2 days - Average snowfall days in November:
7.4 days - Average snowfall days in December:
12.5 days
The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Summerville, SD
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 3min - Average daylight in December:
8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 4min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
11h and 2min - Average sunshine in August:
11h and 3min - Average sunshine in September:
9h and 4min - Average sunshine in October:
6h and 4min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days
Summerville, SD
- Average sunshine days in January:
16.5 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
13.7 days - Average sunshine days in June:
11.7 days
- Average sunshine days in July:
13.6 days - Average sunshine days in August:
16.3 days - Average sunshine days in September:
19.2 days - Average sunshine days in October:
19.2 days - Average sunshine days in November:
19.7 days - Average sunshine days in December:
16.9 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (11.7 days).
Average UV index
Summerville, SD
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Summerville, SD
The months with the most cloud cover are January and February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 20).
Average visibility
Summerville, 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).
Summerville, South Dakota, USA
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