December weather forecastHarrold, SD
December
Weather in December
December, the first month of the winter in Harrold, is also a subzero cold month, with an average temperature ranging between max 28.2°F (-2.1°C) and min 16.3°F (-8.7°C).Temperature
Harrold's transition into December marks a considerable drop in the average high-temperature, moving down from a frosty 44.2°F (6.8°C) in November to a freezing cold 28.2°F (-2.1°C). In Harrold, an average low-temperature of 16.3°F (-8.7°C) is recorded during December nights.Humidity
In December, the average relative humidity in Harrold is 82%.Rainfall
In Harrold, South Dakota, during December, the rain falls for 2.9 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, in Harrold, there are 98.5 rainfall days, and 13.7" (348mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 8.2 days. Throughout December, 2.48" (63mm) of snow is accumulated. In Harrold, during the entire year, snow falls for 41.4 days and aggregates up to 13.07" (332mm) of snow.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:56 am and sunset at 5:00 pm. On the last day of December, sunrise is at 8:15 am and sunset at 5:09 pm CST.
Sunshine
In December, the average sunshine is 4.9h.UV index
February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 1 during December leads to these advisories:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Stay sun-safe with clothing that is both closely woven and worn loosely. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Harrold, SD
- Average high temperature in December: 28.2°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in December: 16.3°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in December
Harrold, SD
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Harrold, SD
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest months (with the lowest average wind speed) are February and August (9.9mph).
Average humidity in December
Harrold, SD
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are August and September (52%).
Average rainfall in December
Harrold, SD
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in December
Harrold, SD
- Average rainfall days in December: 2.9 days
The month with the highest number of rainy days is June (14.2 days).
The month with the least rainy days is February (2.4 days).
Average snowfall in December
Harrold, SD
- Average snowfall in December: 2.48"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Harrold, SD
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is February (10 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harrold, SD
- 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 December: 4h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Harrold, SD
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is June (13.7 days).
Average UV index in December
Harrold, SD
- Average UV index in December: 1
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in December
Harrold, SD
- Average cloud cover in December: 46
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 19).
Average visibility in December
Harrold, SD
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
