Climate and monthly weather forecastSummit, SD
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Summit, South Dakota, with an average temperature varying between 6.1°F (-14.4°C) and 19.6°F (-6.9°C). January is the month when Summit experiences its coldest temperatures, averaging a high of 19.6°F (-6.9°C) and a low of 6.1°F (-14.4°C). Weather in January »Weather in February
February, the last month of the winter in Summit, is also a subzero cold month, with an average temperature ranging between max 22.8°F (-5.1°C) and min 8.6°F (-13°C). The average high-temperature is a still subzero cold 22.8°F (-5.1°C) in February, hardly different from the 19.6°F (-6.9°C) recorded in January. Weather in February »Weather in March
March, the first month of the spring in Summit, is an icy month, with temperature in the range of an average high of 38.5°F (3.6°C) and an average low of 24.4°F (-4.2°C). Summit's weather in March is characterized by a distinct rise in the average high-temperature, escalating from a freezing cold 22.8°F (-5.1°C) in February to an icy 38.5°F (3.6°C). Weather in March »Weather in April
April is a cool spring month in Summit, South Dakota, with temperature in the range of an average high of 52.5°F (11.4°C) and an average low of 36.5°F (2.5°C). As April arrives, a rise in the average high-temperature is observed, moving from a wintry 38.5°F (3.6°C) in March to a fresh 52.5°F (11.4°C). Weather in April »Weather in May
The last month of the spring, May, is a comfortable month in Summit, South Dakota, with an average temperature varying between 66°F (18.9°C) and 48°F (8.9°C). May's arrival coincides with a temperature rise, moving from April's fresh 52.5°F (11.4°C) to a refreshing 66°F (18.9°C). Weather in May »Weather in June
June, the first month of the summer in Summit, is a warm month, with an average temperature ranging between max 75.4°F (24.1°C) and min 57.9°F (14.4°C). With the onset of June, Summit's average high-temperature sees a rise, moving from May's refreshing 66°F (18.9°C) to a warm 75.4°F (24.1°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Summit, South Dakota, with an average temperature ranging between max 81.5°F (27.5°C) and min 61.9°F (16.6°C). July is the warmest month, with the temperature often reaching an average high of 81.5°F (27.5°C) and an average low of 61.9°F (16.6°C). The heat index value for July is calculated to be a tropical 86°F (30°C). Weather in July »Weather in August
August, the last month of the summer in Summit, is another warm month, with an average temperature ranging between max 80.8°F (27.1°C) and min 59.4°F (15.2°C). Summit's average high-temperature in August is a still warm 80.8°F (27.1°C), indicating a subtle variation from July. Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Summit, South Dakota, with an average temperature varying between 72.5°F (22.5°C) and 52.7°F (11.5°C). Summit in September undergoes a slight reduction in the average high-temperature, shifting from August's warm 80.8°F (27.1°C) to a pleasant 72.5°F (22.5°C). Weather in September »Weather in October
October, like September, in Summit, South Dakota, is another fresh autumn month, with an average temperature ranging between max 55.2°F (12.9°C) and min 40.1°F (4.5°C). A noticeable downshift in temperatures is seen as September gives way to October, with average highs moving from an agreeable 72.5°F (22.5°C) to a cool 55.2°F (12.9°C). Weather in October »Weather in November
The last month of the autumn, November, is also an icy month in Summit, South Dakota, with an average temperature ranging between min 27.5°F (-2.5°C) and max 40.6°F (4.8°C). The changeover to November signals a significant decrease in the average high-temperature, dropping from a cool 55.2°F (12.9°C) in October to a wintry 40.6°F (4.8°C). Weather in November »Weather in December
The first month of the winter, December, is still a freezing cold month in Summit, South Dakota, with an average temperature ranging between max 24.6°F (-4.1°C) and min 13.1°F (-10.5°C). As November transitions into December, Summit sees a clear drop in the average high-temperature, declining from an icy 40.6°F (4.8°C) to a freezing cold 24.6°F (-4.1°C). Weather in December »Updated: Aug 31, 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, with its average high-temperature of 19.6°F (-6.9°C) and an average low-temperature of 6.1°F (-14.4°C), holds the record as the coldest month in Summit.
The most humid month is January, with an average relative humidity of 89%.
The months with the least rainfall are January and February Rain falls for 3.7 days and accumulates 0.63" (16mm) of rain.
In Summit, during the entire year, the rain falls for 115.2 days and collects up to 19.88" (505mm) of precipitation.
January through May, October through December are months with snowfall.
In Summit, during the entire year, snow falls for 58.8 days and aggregates up to 20.39" (518mm) of snow.
With an average of 3.9h of sunshine, January has the least sunshine of the year.
January is the month with the lowest UV index, with an average maximum UV index of 1.
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.
June is the month with the most rainfall. Rain falls for 17.8 days and accumulates 3.11" (79mm) of precipitation.
June through September are months without snowfall.
With an average of 15h and 36min of daylight, June has the longest days of the year.
June and July, with an average maximum UV index of 6, are months with the highest UV index.
July, on average, is the warmest month, registering a high temperature of 81.5°F (27.5°C) and a low of 61.9°F (16.6°C).
July has the most sunshine of the year, with an average of 10.8h of sunshine.
The least humid month is October, with an average relative humidity of 66%.
The month with the most snowfall is December, when snow falls for 12.7 days and typically aggregates up to 4.49" (114mm) of snow.
The month with the shortest days is December, with an average of 8h and 48min of daylight.
Average temperature
Summit, SD
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (19.6°F).
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (6.1°F).
Average pressure
Summit, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.16"Hg - Average pressure in March:
30.08"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:
29.93"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.12"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed
Summit, SD
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.2mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.7mph - Average wind speed in June:
8.8mph
- Average wind speed in July:
8mph - Average wind speed in August:
8.1mph - Average wind speed in September:
9.3mph - Average wind speed in October:
10.6mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.4mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity
Summit, SD
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (66%).
Average rainfall
Summit, SD
- Average rainfall in January:
0.63" - Average rainfall in February:
0.63" - Average rainfall in March:
1.14" - Average rainfall in April:
1.69" - Average rainfall in May:
2.56" - Average rainfall in June:
3.11"
- Average rainfall in July:
2.99" - Average rainfall in August:
1.89" - Average rainfall in September:
1.61" - Average rainfall in October:
1.77" - Average rainfall in November:
0.75" - Average rainfall in December:
1.1"
The wettest month (with the highest rainfall) is June (3.11").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days
Summit, SD
- Average rainfall days in January:
3.7 days - Average rainfall days in February:
2.3 days - Average rainfall days in March:
8.3 days - Average rainfall days in April:
12.2 days - Average rainfall days in May:
15.5 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
10 days - Average rainfall days in October:
8.8 days - Average rainfall days in November:
5.8 days - Average rainfall days in December:
4.2 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (2.3 days).
Average snowfall
Summit, SD
- Average snowfall in January:
4.09" - Average snowfall in February:
4.21" - Average snowfall in March:
2.91" - Average snowfall in April:
1.81" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is December (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Summit, SD
- Average snowfall days in January:
13.1 days - Average snowfall days in February:
12.2 days - Average snowfall days in March:
8.2 days - Average snowfall days in April:
3.8 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:
1.6 days - Average snowfall days in November:
6.9 days - Average snowfall days in December:
12.7 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Summit, 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 30min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 36min
- Average daylight in July:
15h and 12min - Average daylight in August:
14h and 0min - 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 54min - Average sunshine in February:
4h and 36min - Average sunshine in March:
5h and 36min - Average sunshine in April:
7h and 42min - Average sunshine in May:
8h and 54min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 48min - Average sunshine in August:
10h and 24min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 12min - Average sunshine in December:
4h and 12min
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 54min).
Average sunshine days
Summit, SD
- Average sunshine days in January:
15.3 days - Average sunshine days in February:
15.5 days - Average sunshine days in March:
15.5 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
13.5 days - Average sunshine days in June:
9.6 days
- Average sunshine days in July:
13.8 days - Average sunshine days in August:
16.6 days - Average sunshine days in September:
18 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
18.4 days - Average sunshine days in December:
16.3 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is June (9.6 days).
Average UV index
Summit, 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
Summit, SD
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 25).
Average visibility
Summit, 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).
