Climate and monthly weather forecastStephan, SD
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Stephan, South Dakota, with an average temperature ranging between max 23.4°F (-4.8°C) and min 9.1°F (-12.7°C). Stephan notes the coldest temperatures in January, with a high average of 23.4°F (-4.8°C) and a low of 9.1°F (-12.7°C). Weather in January »Weather in February
The last month of the winter, February, is another freezing cold month in Stephan, South Dakota, with temperature in the range of an average high of 26.2°F (-3.2°C) and an average low of 12.6°F (-10.8°C). As February takes hold, the average high-temperature is a still freezing cold 26.2°F (-3.2°C), nearly mirroring that of the previous month. Weather in February »Weather in March
The first month of the spring, March, is a wintry month in Stephan, South Dakota, with an average temperature ranging between max 41.4°F (5.2°C) and min 26.1°F (-3.3°C). The shift into March is characterized by a noticeable escalation in the average high-temperature, rising from February's freezing cold 26.2°F (-3.2°C) to a wintry 41.4°F (5.2°C). Weather in March »Weather in April
April in Stephan, South Dakota, is a cool spring month, with temperature in the range of an average low of 36.9°F (2.7°C) and an average high of 54.5°F (12.5°C). April brings an increase in the average high-temperature, progressing from an icy 41.4°F (5.2°C) in March to a fresh 54.5°F (12.5°C). Weather in April »Weather in May
May, the last month of the spring in Stephan, is a refreshing month, with temperature in the range of an average high of 66.7°F (19.3°C) and an average low of 48.2°F (9°C). May's arrival brings a temperature shift, moving from a cool 54.5°F (12.5°C) in April to an enjoyable 66.7°F (19.3°C). Weather in May »Weather in June
June, the first month of the summer in Stephan, is a moderately hot month, with temperature in the range of an average low of 58.6°F (14.8°C) and an average high of 77.9°F (25.5°C). As Stephan transitions into June, the average high-temperature is observed to rise from an enjoyable 66.7°F (19.3°C) in May to a moderately hot 77.9°F (25.5°C). Weather in June »Weather in July
July, like June, in Stephan, South Dakota, is a moderately hot summer month, with an average temperature ranging between min 64.6°F (18.1°C) and max 85.8°F (29.9°C). In Stephan, the highest average temperatures are observed in July, with a high of 85.8°F (29.9°C) and a low of 64.6°F (18.1°C). The heat index in July is estimated at a tropical 91.4°F (33°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Stephan, South Dakota, with an average temperature varying between 62.1°F (16.7°C) and 84°F (28.9°C). The onset of August notes an average high-temperature of a still warm 84°F (28.9°C), subtly shifted from July's 85.8°F (29.9°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Stephan, South Dakota, with an average temperature fluctuating between 54.5°F (12.5°C) and 75.4°F (24.1°C). September signifies a gentle decline in Stephan's average high-temperature, easing from 84°F (28.9°C) in August to a still moderately hot 75.4°F (24.1°C). Weather in September »Weather in October
October, like September, is another refreshing autumn month in Stephan, South Dakota, with an average temperature varying between 56.8°F (13.8°C) and 41.2°F (5.1°C). October signals a considerable drop in Stephan's average high-temperature, reducing from a moderately hot 75.4°F (24.1°C) in September to a moderate 56.8°F (13.8°C). Weather in October »Weather in November
November, the last month of the autumn in Stephan, is also a frosty month, with temperature in the range of an average high of 43.7°F (6.5°C) and an average low of 28.4°F (-2°C). Stepping into November, Stephan observes a temperature decline, with the average high falling from October's refreshing 56.8°F (13.8°C) to a frosty 43.7°F (6.5°C). Weather in November »Weather in December
The first month of the winter, December, is also a subzero cold month in Stephan, South Dakota, with an average temperature ranging between min 14.9°F (-9.5°C) and max 26.8°F (-2.9°C). December is characterized by a clear drop in the average high-temperature, falling from November's chilly 43.7°F (6.5°C) to a subzero cold 26.8°F (-2.9°C). Weather in December »Updated: Jul 6, 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, registering a high temperature of 23.4°F (-4.8°C) and a low of 9.1°F (-12.7°C).
With an average relative humidity of 88%, January is the most humid month.
January is the month with the least rainfall. Rain falls for 2.4 days and accumulates 0.43" (11mm) of precipitation.
Throughout the year, there are 97.3 rainfall days, and 16.73" (425mm) of precipitation is accumulated.
January through May, October through December are months with snowfall.
In Stephan, during the entire year, snow falls for 47.1 days and aggregates up to 16.06" (408mm) of snow.
January has the least sunshine of the year, with an average of 4.1h of sunshine.
The month with the most snowfall is February, when snow falls for 10.1 days and typically aggregates up to 4.21" (107mm) of snow.
February 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.
In Stephan, snow does not fall in June through September.
The month with the longest days is June, with an average of 15h and 30min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
The month of July sees the average highest temperatures, reaching 85.8°F (29.9°C) at the peak and 64.6°F (18.1°C) at the low.
The month with the most rainfall is July, when the rain falls for 12.7 days and typically aggregates up to 3.07" (78mm) of precipitation.
With an average of 11h of sunshine, July has the most sunshine of the year.
With an average relative humidity of 60%, September is the least humid month.
The month with the shortest days is December, with an average of 8h and 54min of daylight.
Average temperature
Stephan, SD
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (23.4°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 (9.1°F).
Average pressure
Stephan, 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:
29.94"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.84"Hg
- Average pressure in July:
29.9"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.95"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 (29.84"Hg).
Average wind speed
Stephan, SD
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.5mph - Average wind speed in April:
11.3mph - Average wind speed in May:
10.2mph - Average wind speed in June:
9.8mph
- Average wind speed in July:
9mph - Average wind speed in August:
8.9mph - Average wind speed in September:
10.3mph - Average wind speed in October:
11.1mph - Average wind speed in November:
10.5mph - Average wind speed in December:
10.5mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).
Average humidity
Stephan, SD
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is September (60%).
Average rainfall
Stephan, SD
- Average rainfall in January:
0.43" - Average rainfall in February:
0.67" - Average rainfall in March:
0.94" - Average rainfall in April:
1.5" - Average rainfall in May:
2.09" - Average rainfall in June:
2.76"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days
Stephan, SD
- Average rainfall days in January:
2.4 days - Average rainfall days in February:
1.3 days - Average rainfall days in March:
6.9 days - Average rainfall days in April:
10.8 days - Average rainfall days in May:
13.6 days - Average rainfall days in June:
15 days
- Average rainfall days in July:
12.7 days - Average rainfall days in August:
11.8 days - Average rainfall days in September:
9 days - Average rainfall days in October:
7.7 days - Average rainfall days in November:
3.6 days - Average rainfall days in December:
2.5 days
The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is February (1.3 days).
Average snowfall
Stephan, SD
- Average snowfall in January:
2.68" - Average snowfall in February:
4.21" - Average snowfall in March:
2.05" - Average snowfall in April:
2.09" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Stephan, SD
- Average snowfall days in January:
10.1 days - Average snowfall days in February:
10.1 days - Average snowfall days in March:
6.6 days - Average snowfall days in April:
3.6 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:
0.1 days - Average snowfall days in October:
1.9 days - Average snowfall days in November:
4.5 days - Average snowfall days in December:
10 days
The months with the highest number of snowfall days are January and February (10.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Stephan, SD
- Average daylight in January:
9h and 18min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 48min - Average daylight in June:
15h and 30min
- Average daylight in July:
15h and 6min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 36min - Average daylight in December:
8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
4h and 6min - Average sunshine in February:
5h and 0min - Average sunshine in March:
5h and 48min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 54min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
11h and 0min - Average sunshine in August:
10h and 36min - Average sunshine in September:
8h and 36min - Average sunshine in October:
6h and 24min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Stephan, SD
- Average sunshine days in January:
18.8 days - Average sunshine days in February:
17.2 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
14.3 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
12.4 days
- Average sunshine days in July:
15.6 days - Average sunshine days in August:
16.3 days - Average sunshine days in September:
18.9 days - Average sunshine days in October:
21.2 days - Average sunshine days in November:
22.1 days - Average sunshine days in December:
20 days
The month with the most sunshine days is November (22.1 days).
The month with the least sunshine days is June (12.4 days).
Average UV index
Stephan, SD
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover
Stephan, SD
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 24).
Average visibility
Stephan, 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).
