Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December is characterized by a noticeable reduction in the average high-temperature, falling from a frosty 45.3°F (7.4°C) in November to a subzero cold 29.3°F (-1.5°C). The average low-temperature, in December, in Alcester, is a still freezing cold 17.1°F (-8.3°C).Humidity
In December, the average relative humidity is 83%.Rainfall
In Alcester, during December, the rain falls for 2.5 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, in Alcester, there are 97.4 rainfall days, and 11.89" (302mm) of precipitation is accumulated.Snowfall
Months with snowfall in Alcester are January through May, October through December. In Alcester, in December, snow falls for 6.5 days, with typically accumulated 1.54" (39mm) of snow. Throughout the year, there are 31.8 snowfall days, and 7.76" (197mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December in Alcester, sunrise is at 7:38 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 5:01 pm CST.
Sunshine
In December, the average sunshine is 4.6h.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 of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 2 during December leads to these advisories:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Alcester in December?
What is the average humidity in December in Alcester?
How much does it rain in Alcester in December?
How much does it snow in Alcester in December?
What is the month with the shortest days in Alcester?
What is the average length of the day in December in Alcester?
What time are sunrise and sunset in December in Alcester?
How many hours of sunshine does Alcester have in December?
When is the lowest UV index in Alcester?
How high is the UV index in December in Alcester?
Average temperature in December
Alcester, SD
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in December: 17.1°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (11.5°F).
Average pressure in December
Alcester, SD
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
Alcester, SD
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in December
Alcester, SD
- Average humidity in December: 83%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (66%).
Average rainfall in December
Alcester, SD
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is June (2.05").
The driest months (with the least rainfall) are February and November (0.31").
Average rainfall days in December
Alcester, SD
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is June (14.6 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in December
Alcester, SD
- Average snowfall in December: 1.54"
The month with the highest snowfall is March (1.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Alcester, SD
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Alcester, SD
- Average daylight in December: 9h and 1min
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: 4h 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: 4h and 18min).
Average sunshine days in December
Alcester, SD
- Average sunshine days in December: 23.9 days
The month with the most sunshine days is December (23.9 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in December
Alcester, SD
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Alcester, SD
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Alcester, 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).
Alcester, South Dakota, USA
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