December weather forecastMartin, SD
December
Weather in December
The first month of the winter, December, is also an icy month in Martin, South Dakota, with an average temperature fluctuating between 18.9°F (-7.3°C) and 32°F (0°C).Temperature
Martin's coldest month, December, generally records average temperatures ranging from a high of 32°F (0°C) to a low of 18.9°F (-7.3°C).Humidity
In December, the average relative humidity is 75%.Rainfall
In Martin, in December, during 2.8 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Martin, during the entire year, the rain falls for 108 days and collects up to 15.39" (391mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In December, it is snowing for 7.5 days. Throughout December, 2.87" (73mm) of snow is accumulated. In Martin, during the entire year, snow falls for 47.3 days and aggregates up to 19.76" (502mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:59 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:21 pm MST.
Sunshine
In Martin, the average sunshine in December is 5.8h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index, 2 during December, leads to the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Martin, SD
- Average high temperature in December: 32°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is December (32°F).
- Average low temperature in December: 18.9°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in December
Martin, SD
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Martin, SD
- Average wind speed in December: 11.4mph
The windiest month (with the highest average wind speed) is April (12.9mph).
The calmest month (with the lowest average wind speed) is August (10.4mph).
Average humidity in December
Martin, SD
- Average humidity in December: 75%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are August and September (51%).
Average rainfall in December
Martin, SD
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is May (2.4").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in December
Martin, SD
- Average rainfall days in December: 2.8 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is December (2.8 days).
Average snowfall in December
Martin, SD
- Average snowfall in December: 2.87"
The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Martin, SD
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Martin, SD
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 5h and 48min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in December
Martin, SD
- Average sunshine days in December: 21 days
The month with the most sunshine days is December (21 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in December
Martin, SD
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Martin, SD
- Average cloud cover in December: 37
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in December
Martin, 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).
