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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 Roslyn, South Dakota, with temperature in the range of an average high of 18.9°F (-7.3°C) and an average low of 5°F (-15°C). With an average high-temperature of 18.9°F (-7.3°C) and an average low-temperature of 5°F (-15°C), January is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Roslyn, South Dakota, with an average temperature varying between 21.4°F (-5.9°C) and 7.2°F (-13.8°C). February observes an average high-temperature of a still freezing cold 21.4°F (-5.9°C), marking an insignificant difference from January's 18.9°F (-7.3°C). Weather in February »
Weather in March
The first month of the spring, March, is a wintry month in Roslyn, South Dakota, with an average temperature fluctuating between 23.2°F (-4.9°C) and 37.6°F (3.1°C). In March, the average high-temperature increases considerably from a subzero cold 21.4°F (-5.9°C) in February to a cold 37.6°F (3.1°C). Weather in March »
Weather in April
April in Roslyn, South Dakota, is a cool spring month, with temperature in the range of an average high of 51.1°F (10.6°C) and an average low of 35.1°F (1.7°C). With the onset of April, Roslyn experiences a temperature shift, with the average high-temperature moving from an icy 37.6°F (3.1°C) in March to a fresh 51.1°F (10.6°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in Roslyn, South Dakota, with an average temperature varying between 46.6°F (8.1°C) and 64°F (17.8°C). In Roslyn, the average high-temperature in May increases from a fresh 51.1°F (10.6°C) in April to an enjoyable 64°F (17.8°C). Weather in May »
Weather in June
June, the first month of the summer in Roslyn, is a warm month, with an average temperature ranging between max 74.3°F (23.5°C) and min 56.3°F (13.5°C). June sees a temperature increase, moving from a refreshing 64°F (17.8°C) in May to a moderately hot 74.3°F (23.5°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Roslyn, South Dakota, with an average temperature fluctuating between 61.3°F (16.3°C) and 81°F (27.2°C). With its high average temperature of 81°F (27.2°C) and a low of 61.3°F (16.3°C), July is regarded as the warmest month. Throughout July, the heat index is appraised at 84.2°F (29°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Roslyn, South Dakota, with an average temperature fluctuating between 58.8°F (14.9°C) and 80.1°F (26.7°C). In August, Roslyn notes an average high-temperature of a still moderately hot 80.1°F (26.7°C), hardly different from the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Roslyn, is also an agreeable month, with temperature in the range of an average low of 51.3°F (10.7°C) and an average high of 71.6°F (22°C). September is characterized by a mild reduction in the average high-temperature, from a warm 80.1°F (26.7°C) in August to an agreeable 71.6°F (22°C). Weather in September »
Weather in October
October, like September, in Roslyn, South Dakota, is another fresh autumn month, with an average temperature ranging between max 53.8°F (12.1°C) and min 38.7°F (3.7°C). Roslyn experiences a clear temperature downturn in October, with average high-temperatures moving from an agreeable 71.6°F (22°C) in September to a cool 53.8°F (12.1°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a wintry month in Roslyn, South Dakota, with temperature in the range of an average low of 25.7°F (-3.5°C) and an average high of 38.8°F (3.8°C). The onset of November brings a clear temperature shift, with the average high-temperature decreasing from a cool 53.8°F (12.1°C) in October to a wintry 38.8°F (3.8°C). Weather in November »
Weather in December
December, the first month of the winter in Roslyn, is still a freezing cold month, with an average temperature ranging between min 11.5°F (-11.4°C) and max 23.2°F (-4.9°C). Roslyn's weather undergoes a significant change with the arrival of December, as the average high-temperature drops from a cold 38.8°F (3.8°C) in November to a subzero cold 23.2°F (-4.9°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Roslyn?
The coldest temperatures occur during January, when averages reach a peak of 18.9°F (-7.3°C) and a low of 5°F (-15°C).
What is the most humid month in Roslyn?
With an average relative humidity of 91%, January is the most humid month.
How many days does it rain in Roslyn?
In Roslyn, South Dakota, during the entire year, the rain falls for 112.9 days and collects up to 22.09" (561mm) of precipitation.
When does it snow in Roslyn?
January through May, October through December are months with snowfall in Roslyn.
How many days does it snow in Roslyn?
Throughout the year, there are 68.4 snowfall days, and 23.74" (603mm) of snow is accumulated.
What is the month with the least sunshine in Roslyn?
The month with the least sunshine in Roslyn, South Dakota, is January, with an average of 3.2h of sunshine.
When is the lowest UV index in Roslyn?
The months with the lowest UV index in Roslyn are January, November and December, with an average maximum UV index of 1.
When is Daylight Saving Time (DST) in Roslyn?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Roslyn, 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.
When it does not snow in Roslyn?
In Roslyn, South Dakota, snow does not fall in June through September.
When are the longest days in Roslyn?
The month with the longest days is June, with an average of 15h and 36min of daylight.
What is the month with the highest UV index in Roslyn?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What time of the year is the hottest in Roslyn?
Roslyn's July weather reaches an average high of 81°F (27.2°C) and an average low of 61.3°F (16.3°C), making it the warmest month.
What is the rainiest month in Roslyn?
The month with the most rainfall is July, when the rain falls for 14.4 days and typically aggregates up to 3.58" (91mm) of precipitation.
What month has the most sunshine in Roslyn?
The month with the most sunshine in Roslyn, South Dakota, is July, with an average of 10.7h of sunshine.
What is the least humid month in Roslyn?
The least humid month is September, with an average relative humidity of 66%.
What is the driest month in Roslyn?
The month with the least rainfall in Roslyn is November, when the rain falls for 4.6 days and typically collects 0.63" (16mm) of precipitation.
What is the snowiest month in Roslyn?
The month with the most snowfall in Roslyn is December, when snow falls for 14.6 days and typically aggregates up to 4.53" (115mm) of snow.
What is the month with the shortest days in Roslyn?
With an average of 8h and 48min of daylight, December has the shortest days of the year.
Average temperature
Roslyn, SD
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (18.9°F).
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (5°F).
Average pressure
Roslyn, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.17"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:
29.85"Hg
- Average pressure in July:
29.92"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 month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed
Roslyn, SD
- Average wind speed in January:
11mph - Average wind speed in February:
10.6mph - Average wind speed in March:
11mph - Average wind speed in April:
11.7mph - Average wind speed in May:
10.5mph - Average wind speed in June:
9.6mph
- Average wind speed in July:
8.7mph - Average wind speed in August:
8.8mph - Average wind speed in September:
10.3mph - Average wind speed in October:
11.3mph - Average wind speed in November:
11mph - Average wind speed in December:
11mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is July (8.7mph).
Average humidity
Roslyn, SD
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is September (66%).
Average rainfall
Roslyn, SD
- Average rainfall in January:
0.71" - Average rainfall in February:
0.71" - Average rainfall in March:
1.26" - Average rainfall in April:
1.93" - Average rainfall in May:
2.72" - Average rainfall in June:
3.46"
- Average rainfall in July:
3.58" - Average rainfall in August:
2.01" - Average rainfall in September:
1.57" - Average rainfall in October:
2.52" - Average rainfall in November:
0.63" - Average rainfall in December:
0.98"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days
Roslyn, SD
- Average rainfall days in January:
2.5 days - Average rainfall days in February:
2.3 days - Average rainfall days in March:
8.1 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
17.9 days
- Average rainfall days in July:
14.4 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
8.8 days - Average rainfall days in November:
4.6 days - Average rainfall days in December:
4.1 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall
Roslyn, SD
- Average snowfall in January:
4.45" - Average snowfall in February:
4.29" - Average snowfall in March:
3.19" - Average snowfall in April:
2.64" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is December (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Roslyn, SD
- Average snowfall days in January:
15.1 days - Average snowfall days in February:
12.5 days - Average snowfall days in March:
10.4 days - Average snowfall days in April:
5.8 days - Average snowfall days in May:
0.8 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:
2.6 days - Average snowfall days in November:
6.6 days - Average snowfall days in December:
14.6 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Roslyn, 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:
14h and 5min - 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 5min
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 1min - Average sunshine in February:
4h and 0min - Average sunshine in March:
5h and 1min - Average sunshine in April:
7h and 2min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days
Roslyn, SD
- Average sunshine days in January:
14.3 days - Average sunshine days in February:
14.9 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
13 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
13.7 days - Average sunshine days in August:
16.5 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
15.2 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (10.4 days).
Average UV index
Roslyn, SD
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover
Roslyn, SD
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility
Roslyn, SD
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Roslyn, South Dakota, USA
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