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
Willow Lake's transition into December marks a considerable drop in the average high-temperature, moving down from an icy 40.1°F (4.5°C) in November to a freezing cold 23.7°F (-4.6°C). Throughout the December nights, Willow Lake encounters a low-temperature of 12.4°F (-10.9°C).Humidity
In Willow Lake, South Dakota, the average relative humidity in December is 87%.Rainfall
In December, in Willow Lake, the rain falls for 3.5 days. Throughout December, 0.75" (19mm) of precipitation is accumulated. Throughout the year, in Willow Lake, there are 112.3 rainfall days, and 18.78" (477mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. The months with the most snowfall are January and December, with an average 3.74" (95mm) of accumulated snow.Daylight
December has the shortest days of the year in Willow Lake, with an average of 8h and 54min of daylight.On the first day of December in Willow Lake, sunrise is at 7:48 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 8:07 am and sunset at 5:00 pm CST.
Sunshine
In Willow Lake, the average sunshine in December is 4h.UV index
The months with the lowest UV index in Willow Lake, South Dakota, are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
How cold is it in Willow Lake in December?
What is the average humidity in December in Willow Lake?
How much does it rain in Willow Lake in December?
What is the snowiest month in Willow Lake?
How many days does it snow in December in Willow Lake?
What is the month with the shortest days in Willow Lake?
How many hours of daylight does Willow Lake have in December?
When are sunrise and sunset in December in Willow Lake?
How long on average sun shines in December in Willow Lake?
What are the months with the lowest UV index in Willow Lake?
How high is the UV index in December in Willow Lake?
Average temperature in December
Willow Lake, 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
Willow Lake, 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
Willow Lake, 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
Willow Lake, 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
Willow Lake, 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
Willow Lake, 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
Willow Lake, 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
Willow Lake, 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
Willow Lake, SD
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- 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
Willow Lake, 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
Willow Lake, 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
Willow Lake, 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
Willow Lake, 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).
Willow Lake, South Dakota, USA
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