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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 Rockham, South Dakota, is another subzero cold winter month, with an average temperature fluctuating between 22.5°F (-5.3°C) and 7.9°F (-13.4°C). Temperature readings reach their annual highs in January, averaging 22.5°F (-5.3°C) and a minimum average of 7.9°F (-13.4°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Rockham, South Dakota, with an average temperature varying between 25.7°F (-3.5°C) and 11.5°F (-11.4°C). The shift from January to February is characterized by an average high-temperature of a still subzero cold 25.7°F (-3.5°C), not significantly different from the 22.5°F (-5.3°C) of January. Weather in February »
Weather in March
The first month of the spring, March, is a cold month in Rockham, South Dakota, with an average temperature ranging between max 41.5°F (5.3°C) and min 25.9°F (-3.4°C). The shift into March brings a noticeable increase in the average high-temperature, soaring from a freezing cold 25.7°F (-3.5°C) in February to a wintry 41.5°F (5.3°C). Weather in March »
Weather in April
April in Rockham, South Dakota, is a moderate spring month, with an average temperature varying between 55.4°F (13°C) and 37.4°F (3°C). April's arrival brings a temperature shift, moving from an icy 41.5°F (5.3°C) in March to a refreshing 55.4°F (13°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Rockham, South Dakota, with an average temperature varying between 48.9°F (9.4°C) and 67.6°F (19.8°C). Rockham's transition into May brings a rise in the average high-temperature, moving from a refreshing 55.4°F (13°C) in April to an enjoyable 67.6°F (19.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Rockham, South Dakota, with an average temperature varying between 78.4°F (25.8°C) and 58.6°F (14.8°C). June sees a rise in the average high-temperature, climbing from an enjoyable 67.6°F (19.8°C) in May to a warm 78.4°F (25.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Rockham, South Dakota, with an average temperature ranging between min 64°F (17.8°C) and max 85.6°F (29.8°C). Rockham's warmest temperatures are experienced in July, with average high temperatures of 85.6°F (29.8°C) and lows of 64°F (17.8°C). July's heat index is appraised at a hot 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Rockham, is another warm month, with an average temperature ranging between max 84.4°F (29.1°C) and min 61.3°F (16.3°C). Rockham's weather in August, with an average high-temperature of a still warm 84.4°F (29.1°C), subtly shifts from 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 Rockham, South Dakota, with an average temperature fluctuating between 75.9°F (24.4°C) and 54.5°F (12.5°C). Rockham observes a small decrease in the average high-temperature with the arrival of September, falling from August's warm 84.4°F (29.1°C) to a still moderately hot 75.9°F (24.4°C). Weather in September »
Weather in October
October, the same as September, in Rockham, South Dakota, is another refreshing autumn month, with temperature in the range of an average high of 57.9°F (14.4°C) and an average low of 41.2°F (5.1°C). A distinct shift in the average high-temperature is signaled in October, moving down from a moderately hot 75.9°F (24.4°C) in September to a mild 57.9°F (14.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Rockham, South Dakota, with temperature in the range of an average high of 43.5°F (6.4°C) and an average low of 28.6°F (-1.9°C). November brings a significant decrease in the average high-temperature, moving down from a refreshing 57.9°F (14.4°C) in October to a chilly 43.5°F (6.4°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Rockham, South Dakota, with temperature in the range of an average high of 26.4°F (-3.1°C) and an average low of 14.2°F (-9.9°C). December signals a considerable drop in Rockham's average high-temperature, reducing from a chilly 43.5°F (6.4°C) in November to a freezing cold 26.4°F (-3.1°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 part of the year is the coldest in Rockham?
January stands out as Rockham's coldest month, with an average high-temperature of 22.5°F (-5.3°C) and a low-temperature of 7.9°F (-13.4°C).
What is the most humid month?
January is the most humid month, with an average relative humidity of 88%.
What is the driest month?
January is the month with the least rainfall. Rain falls for 2.5 days and accumulates 0.51" (13mm) of precipitation.
How many days does it rain?
Throughout the year, there are 97.6 rainfall days, and 17.83" (453mm) of precipitation is accumulated.
When does it snow?
January through April, October through December are months with snowfall.
How much does it snow?
Throughout the year, there are 43.7 snowfall days, and 18.66" (474mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 4.1h of sunshine, January has the least sunshine of the year.
When is the lowest UV index?
January and February, with an average maximum UV index of 1, are months with the lowest UV index.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 8.9 days and typically aggregates up to 4.09" (104mm) of snow.
When is Daylight Saving Time (DST)?
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.
When it does not snow?
In Rockham, snow does not fall in May through September.
What is the rainiest month?
June is the month with the most rainfall. Rain falls for 15.1 days and accumulates 3.03" (77mm) of precipitation.
When are the longest days?
With an average of 15h and 30min of daylight, June has the longest days of the year.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What part of the year is the hottest?
The temperatures reach their highest averages in July, with highs of 85.6°F (29.8°C) and lows of 64°F (17.8°C).
What month has the most sunshine?
The month with the most sunshine in Rockham is July, with an average of 11.2h of sunshine.
What is the least humid month?
September is the least humid month in Rockham, with an average relative humidity of 60%.
What is the month with the shortest days?
With an average of 8h and 54min of daylight, December has the shortest days of the year.
Average temperature
Rockham, 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 (22.5°F).
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure
Rockham, 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:
29.92"Hg - Average pressure in June:
29.84"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.91"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 (29.84"Hg).
Average wind speed
Rockham, SD
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.7mph - Average wind speed in March:
10mph - Average wind speed in April:
10.8mph - Average wind speed in May:
9.7mph - Average wind speed in June:
9.1mph
- Average wind speed in July:
8.5mph - Average wind speed in August:
8.5mph - Average wind speed in September:
9.7mph - Average wind speed in October:
10.6mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.7mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).
Average humidity
Rockham, SD
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is September (60%).
Average rainfall
Rockham, SD
- Average rainfall in January:
0.51" - Average rainfall in February:
0.67" - Average rainfall in March:
1.02" - Average rainfall in April:
1.61" - Average rainfall in May:
2.4" - Average rainfall in June:
3.03"
The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days
Rockham, SD
- Average rainfall days in January:
2.5 days - Average rainfall days in February:
1.9 days - Average rainfall days in March:
7.2 days - Average rainfall days in April:
10.6 days - Average rainfall days in May:
13.3 days - Average rainfall days in June:
15.1 days
- Average rainfall days in July:
11.7 days - Average rainfall days in August:
11.3 days - Average rainfall days in September:
9.3 days - Average rainfall days in October:
7.9 days - Average rainfall days in November:
4.1 days - Average rainfall days in December:
2.7 days
The month with the highest number of rainy days is June (15.1 days).
The month with the least rainy days is February (1.9 days).
Average snowfall
Rockham, SD
The month with the highest snowfall is February (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Rockham, SD
- Average snowfall days in January:
9.8 days - Average snowfall days in February:
8.9 days - Average snowfall days in March:
6.8 days - Average snowfall days in April:
3.3 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:
1.3 days - Average snowfall days in November:
4.5 days - Average snowfall days in December:
9 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Rockham, 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 5min - Average daylight in June:
15h and 3min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 4min - Average daylight in December:
8h and 5min
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 1min - Average sunshine in February:
5h and 1min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 5min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
10h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 3min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Rockham, SD
- Average sunshine days in January:
19.5 days - Average sunshine days in February:
18 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
15 days - Average sunshine days in May:
15.2 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
16.8 days - Average sunshine days in August:
16.9 days - Average sunshine days in September:
18.4 days - Average sunshine days in October:
20.5 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
20.4 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (12.2 days).
Average UV index
Rockham, SD
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover
Rockham, SD
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 22).
Average visibility
Rockham, 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).
Rockham, South Dakota, USA
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