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
Witnessing a clear downswing, the average high-temperature during December drops from November's frosty 46.4°F (8°C) to a freezing cold 31.8°F (-0.1°C). During December, Saint Francis consistently records a temperature low averaging 20.1°F (-6.6°C).Humidity
In Saint Francis, the average relative humidity in December is 76%.Rainfall
In Saint Francis, South Dakota, in December, it is raining for 3.7 days, with typically 0.79" (20mm) of accumulated precipitation. Throughout the year, there are 109.2 rainfall days, and 16.89" (429mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. The month with the most snowfall in Saint Francis is December, when snow falls for 7.1 days and typically aggregates up to 2.76" (70mm) of snow.Daylight
December has the shortest days of the year in Saint Francis, South Dakota, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:56 am and sunset at 5:09 pm. On the last day of December, in Saint Francis, sunrise is at 8:15 am and sunset at 5:18 pm CST.
Sunshine
In December, the average sunshine is 5.5h.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 low health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Saint Francis?
What is the average humidity in December in Saint Francis?
How many days does it rain in December in Saint Francis?
When does it snow the most in Saint Francis?
How much does it snow in Saint Francis in December?
What is the month with the shortest days in Saint Francis?
What is the average length of the day in December in Saint Francis?
What time are sunrise and sunset in December in Saint Francis?
How many hours of sunshine does Saint Francis have in December?
When is the lowest UV index in Saint Francis?
How high is the UV index in December in Saint Francis?
Average temperature in December
Saint Francis, SD
- Average high temperature in December: 31.8°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 20.1°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Saint Francis, SD
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Saint Francis, SD
- Average wind speed in December: 11.9mph
The windiest month (with the highest average wind speed) is April (13.1mph).
The calmest months (with the lowest average wind speed) are July and August (10.6mph).
Average humidity in December
Saint Francis, SD
- Average humidity in December: 76%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is September (56%).
Average rainfall in December
Saint Francis, SD
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in December
Saint Francis, SD
- Average rainfall days in December: 3.7 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in December
Saint Francis, SD
- Average snowfall in December: 2.76"
The month with the highest snowfall is December (2.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Saint Francis, SD
- Average snowfall days in December: 7.1 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Saint Francis, 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: 5h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
Saint Francis, SD
- Average sunshine days in December: 20.4 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in December
Saint Francis, 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
Saint Francis, SD
- Average cloud cover in December: 41
The month with the most cloud cover is February (Cloud cover 44).
The months with the least cloud cover are July, August and September (Cloud cover 21).
Average visibility in December
Saint Francis, 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).
Saint Francis, South Dakota, USA
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