December weather forecastWaverly, SD
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Waverly, South Dakota, with temperature in the range of an average low of 12.4°F (-10.9°C) and an average high of 23.7°F (-4.6°C).Temperature
December marks a distinct drop in the average high-temperature, descending from November's cold 40.1°F (4.5°C) to a freezing cold 23.7°F (-4.6°C). In the month of December, the average temperature dips to a frigid cold 12.4°F (-10.9°C) during the night.Humidity
In Waverly, the average relative humidity in December is 87%.Rainfall
In Waverly, in December, during 3.5 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. In Waverly, during the entire year, the rain falls for 112.3 days and collects up to 18.78" (477mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. The months with the most snowfall in Waverly are January and December, with an average 3.74" (95mm) of accumulated snow.Daylight
December has the shortest days of the year in Waverly, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:46 am and sunset at 4:47 pm. On the last day of December, in Waverly, sunrise is at 8:06 am and sunset at 4:56 pm CST.
Sunshine
In Waverly, the average sunshine in December is 4h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 1 during December translates into the following guidance:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Waverly, SD
- Average high temperature in December: 23.7°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (19.4°F).
- Average low temperature in December: 12.4°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (5.5°F).
Average pressure in December
Waverly, SD
- Average pressure in December: 30.13"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Waverly, SD
- Average wind speed in December: 11mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).
Average humidity in December
Waverly, SD
- Average humidity in December: 87%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are September and October (68%).
Average rainfall in December
Waverly, SD
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is June (3.19").
The driest months (with the least rainfall) are January and February (0.59").
Average rainfall days in December
Waverly, SD
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is June (17.2 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in December
Waverly, SD
- Average snowfall in December: 3.74"
The months with the highest snowfall are January and December (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Waverly, SD
- Average snowfall days in December: 13 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Waverly, SD
- Average daylight in December: 8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Waverly, SD
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Waverly, SD
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Waverly, SD
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Waverly, SD
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
