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
Temperature readings reach their annual highs in December, averaging 32.4°F (0.2°C) and a minimum average of 18.7°F (-7.4°C).Humidity
The average relative humidity in December is 76%.Rainfall
In December, the rain falls for 2.5 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. Throughout the year, there are 86.7 rainfall days, and 13.66" (347mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Allen. In Allen, South Dakota, during December, snow falls for 8.2 days and regularly aggregates up to 3.9" (99mm) of snow. In Allen, during the entire year, snow falls for 47.4 days and aggregates up to 22.72" (577mm) of snow.Daylight
The month with the shortest days in Allen is December, with an average of 9h and 0min of daylight.On the first day of December in Allen, South Dakota, sunrise is at 7:00 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:22 pm MST.
Sunshine
The average sunshine in December is 5.7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: In December, a regular UV index of 2 translates into these guidelines:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
What is the coldest time of year in Allen?
How cold is it in Allen in December?
What is the average humidity in December in Allen?
How many days does it rain in December in Allen?
How many days does it snow in December in Allen?
What is the month with the shortest days in Allen?
How many hours of daylight does Allen have in December?
When are sunrise and sunset in December in Allen?
How many hours of sunshine does Allen have in December?
What are the months with the lowest UV index in Allen?
How high is the UV index in December in Allen?
Average temperature in December
Allen, SD
- Average high temperature in December: 32.4°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in December: 18.7°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in December
Allen, 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 (29.85"Hg).
Average wind speed in December
Allen, SD
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (10.2mph).
Average humidity in December
Allen, SD
- Average humidity in December: 76%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (48%).
Average rainfall in December
Allen, SD
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in December
Allen, SD
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is May (13.1 days).
The months with the least rainy days are February and December (2.5 days).
Average snowfall in December
Allen, SD
- Average snowfall in December: 3.9"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Allen, SD
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Allen, SD
- Average daylight in December: 9h and 0min
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 0min).
- Average sunshine in December: 5h and 4min
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 12min).
Average sunshine days in December
Allen, SD
- Average sunshine days in December: 20.8 days
The month with the most sunshine days is September (22.8 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in December
Allen, 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
Allen, SD
- Average cloud cover in December: 39
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Allen, 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).
Allen, South Dakota, USA
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