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
The onset of December brings a distinct decrease in the average high-temperature, receding from a wintry 41.2°F (5.1°C) in November to a freezing cold 26.2°F (-3.2°C). Nightly temperatures in Ralph drop to an average low of 14.4°F (-9.8°C) in December.Humidity
The average relative humidity in December in Ralph is 82%.Rainfall
In Ralph, in December, it is raining for 4 days, with typically 0.59" (15mm) of accumulated precipitation. In Ralph, during the entire year, the rain falls for 104.8 days and collects up to 15.2" (386mm) of precipitation.Snowfall
Months with snowfall in Ralph are January through June, October through December. In December, it is snowing for 12.5 days. Throughout December, 3.03" (77mm) of snow is accumulated. Throughout the year, there are 67.2 snowfall days, and 24.69" (627mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 42min of daylight.On the first day of December in Ralph, sunrise is at 7:13 am and sunset at 4:09 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:17 pm MST.
Sunshine
In December, the average sunshine is 4.9h.UV index
In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 2 in December translates into this advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Experience reduced UV exposure by about half when donning a wide-brim hat. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Frequently asked questions
How cold is it in Ralph in December?
What is the average humidity in December in Ralph?
How much does it rain in Ralph in December?
How much does it snow in Ralph in December?
What is the month with the shortest days in Ralph?
How many hours of daylight does Ralph have in December?
When are sunrise and sunset in December in Ralph?
How long on average sun shines in December in Ralph?
What is the UV index reading in December in Ralph?
Average temperature in December
Ralph, SD
- Average high temperature in December: 26.2°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (25.5°F).
- Average low temperature in December: 14.4°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in December
Ralph, SD
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Ralph, SD
- Average wind speed in December: 11.1mph
The windiest months (with the highest average wind speed) are January and October (11.7mph).
The calmest month (with the lowest average wind speed) is August (9.7mph).
Average humidity in December
Ralph, SD
- Average humidity in December: 82%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (50%).
Average rainfall in December
Ralph, SD
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (2.48").
The driest months (with the least rainfall) are January and November (0.51").
Average rainfall days in December
Ralph, SD
- Average rainfall days in December: 4 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is November (3 days).
Average snowfall in December
Ralph, SD
- Average snowfall in December: 3.03"
The month with the highest snowfall is February (4.84").
The months with the least snowfall are July, August and September (0").
Average snowfall days in December
Ralph, SD
- Average snowfall days in December: 12.5 days
The month with the highest number of snowfall days is February (13.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Ralph, SD
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Ralph, SD
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in December
Ralph, SD
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in December
Ralph, SD
- Average cloud cover in December: 50
The months with the most cloud cover are January and February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 20).
Average visibility in December
Ralph, 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).
Ralph, South Dakota, USA
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