Climate and monthly weather forecastCastlewood, SD
Climate and monthly weather forecast
Weather in January
January, the same as December, in Castlewood, South Dakota, is another subzero cold winter month, with an average temperature fluctuating between 19.4°F (-7°C) and 5.5°F (-14.7°C). January, noted for its average high-temperature of 19.4°F (-7°C) and an average low-temperature of 5.5°F (-14.7°C), is considered the coldest month. Weather in January »Weather in February
February, the last month of the winter in Castlewood, is also a subzero cold month, with an average temperature fluctuating between 22.5°F (-5.3°C) and 8.4°F (-13.1°C). The shift into February uncovers an average high-temperature of a still subzero cold 22.5°F (-5.3°C), subtly different from the previous month. Weather in February »Weather in March
March, the first month of the spring in Castlewood, is a cold month, with temperature in the range of an average high of 38.1°F (3.4°C) and an average low of 23.7°F (-4.6°C). March's arrival is marked by a notable elevation in high-temperatures, rising from a freezing cold 22.5°F (-5.3°C) in February to an icy 38.1°F (3.4°C). Weather in March »Weather in April
April in Castlewood, South Dakota, is a cool spring month, with an average temperature varying between 51.6°F (10.9°C) and 35.2°F (1.8°C). With the onset of April, Castlewood's weather sees a temperature rise, transitioning from a cold 38.1°F (3.4°C) in March to a cool 51.6°F (10.9°C). Weather in April »Weather in May
May, the last month of the spring in Castlewood, is an enjoyable month, with an average temperature varying between 46.9°F (8.3°C) and 64.6°F (18.1°C). May brings a rise in the average high-temperature, transitioning from April's cool 51.6°F (10.9°C) to a comfortable 64.6°F (18.1°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Castlewood, South Dakota, with an average temperature fluctuating between 56.8°F (13.8°C) and 74.5°F (23.6°C). June's onset is marked by a temperature increase, moving from an enjoyable 64.6°F (18.1°C) in May to a warm 74.5°F (23.6°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Castlewood, South Dakota, with an average temperature fluctuating between 80.8°F (27.1°C) and 60.8°F (16°C). July, recognised by an average high temperature of 80.8°F (27.1°C) and a low of 60.8°F (16°C), is Castlewood's warmest month. For July, the heat index is estimated at 84.2°F (29°C). Weather in July »Weather in August
August, the last month of the summer in Castlewood, is also a moderately hot month, with an average temperature varying between 80.1°F (26.7°C) and 59°F (15°C). Castlewood ushers in August with an average high-temperature of a still moderately hot 80.1°F (26.7°C), showing a close resemblance to the previous month. Weather in August »Weather in September
September, the first month of the autumn in Castlewood, is also an agreeable month, with an average temperature fluctuating between 71.6°F (22°C) and 51.3°F (10.7°C). The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a moderately hot 80.1°F (26.7°C) in August to a pleasant 71.6°F (22°C). Weather in September »Weather in October
October, like September, in Castlewood, South Dakota, is another fresh autumn month, with an average temperature fluctuating between 54.3°F (12.4°C) and 39°F (3.9°C). October's arrival sees a clear drop in the average high-temperature, decreasing from September's agreeable 71.6°F (22°C) to a fresh 54.3°F (12.4°C). Weather in October »Weather in November
The last month of the autumn, November, is also a wintry month in Castlewood, South Dakota, with an average temperature varying between 26.4°F (-3.1°C) and 40.1°F (4.5°C). The commencement of November indicates a shift in the average high-temperature, receding from October's fresh 54.3°F (12.4°C) to a cold 40.1°F (4.5°C). Weather in November »Weather in December
December, the first month of the winter in Castlewood, is also a subzero cold month, with temperature in the range of an average low of 12.4°F (-10.9°C) and an average high of 23.7°F (-4.6°C). Castlewood's December weather is marked by a distinct drop in high-temperatures, declining from an icy 40.1°F (4.5°C) in November to a freezing cold 23.7°F (-4.6°C). Weather in December »Updated: Aug 12, 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 tends to be the coldest month, with temperatures averaging a daily high of 19.4°F (-7°C) and a low of 5.5°F (-14.7°C).
January is the most humid month, with an average relative humidity of 90%.
The months with the least rainfall are January and February Rain falls for 2.9 days and accumulates 0.59" (15mm) of rain.
Throughout the year, there are 112.3 rainfall days, and 18.78" (477mm) of precipitation is accumulated.
Months with snowfall are January through May, October through December.
The months with the most snowfall are January and December, with an average 3.74" (95mm) of accumulated snow.
Throughout the year, there are 64.3 snowfall days, and 17.56" (446mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 3.6h of sunshine.
The months with the lowest UV index are January and December, 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 17.2 days and accumulates 3.19" (81mm) of precipitation.
June through September are months without snowfall.
With an average of 15h and 30min 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.
Castlewood's temperatures peak on average in July, reaching 80.8°F (27.1°C) at their highest and 60.8°F (16°C) at their lowest.
July has the most sunshine of the year, with an average of 10.7h of sunshine.
The months with the lowest humidity in Castlewood are September and October, with an average relative humidity of 68%.
December has the shortest days of the year, with an average of 8h and 54min of daylight.
Average temperature
Castlewood, SD
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (19.4°F).
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (5.5°F).
Average pressure
Castlewood, 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:
29.95"Hg - Average pressure in May:
29.92"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:
29.97"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 (29.85"Hg).
Average wind speed
Castlewood, SD
- Average wind speed in January:
11mph - Average wind speed in February:
10.8mph - Average wind speed in March:
10.9mph - Average wind speed in April:
11.6mph - Average wind speed in May:
10.3mph - Average wind speed in June:
9.4mph
- Average wind speed in July:
8.5mph - Average wind speed in August:
8.6mph - Average wind speed in September:
10mph - Average wind speed in October:
11.2mph - Average wind speed in November:
11mph - Average wind speed in December:
11mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).
Average humidity
Castlewood, SD
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are September and October (68%).
Average rainfall
Castlewood, SD
- Average rainfall in January:
0.59" - Average rainfall in February:
0.59" - Average rainfall in March:
1.02" - Average rainfall in April:
1.46" - Average rainfall in May:
2.52" - Average rainfall in June:
3.19"
- Average rainfall in July:
2.91" - Average rainfall in August:
1.81" - Average rainfall in September:
1.57" - Average rainfall in October:
1.73" - Average rainfall in November:
0.63" - Average rainfall in December:
0.75"
The wettest month (with the highest rainfall) is June (3.19").
The driest months (with the least rainfall) are January and February (0.59").
Average rainfall days
Castlewood, SD
- Average rainfall days in January:
2.9 days - Average rainfall days in February:
2.7 days - Average rainfall days in March:
7.8 days - Average rainfall days in April:
11.6 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
12.4 days - Average rainfall days in September:
10.4 days - Average rainfall days in October:
8.3 days - Average rainfall days in November:
4.9 days - Average rainfall days in December:
3.5 days
The month with the highest number of rainy days is June (17.2 days).
The month with the least rainy days is February (2.7 days).
Average snowfall
Castlewood, SD
- Average snowfall in January:
3.74" - Average snowfall in February:
3.35" - Average snowfall in March:
2.2" - Average snowfall in April:
1.46" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The months with the highest snowfall are January and December (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Castlewood, SD
- Average snowfall days in January:
14.4 days - Average snowfall days in February:
11.8 days - Average snowfall days in March:
10 days - Average snowfall days in April:
4.8 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:
0.1 days - Average snowfall days in October:
2.3 days - Average snowfall days in November:
7.1 days - Average snowfall days in December:
13 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Castlewood, 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 12min - 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:
3h and 36min - Average sunshine in February:
4h and 18min - Average sunshine in March:
5h and 24min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 48min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 12min - Average sunshine in December:
4h and 0min
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 36min).
Average sunshine days
Castlewood, SD
- Average sunshine days in January:
15.1 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
13.8 days - Average sunshine days in August:
15.7 days - Average sunshine days in September:
18.2 days - Average sunshine days in October:
19.1 days - Average sunshine days in November:
19 days - Average sunshine days in December:
16.3 days
The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is June (10.3 days).
Average UV index
Castlewood, SD
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Castlewood, SD
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
Castlewood, 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).
