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
Onset of December witnesses a reduction in the average high-temperature, falling from a chilly 42.8°F (6°C) in November to a subzero cold 30.4°F (-0.9°C). December's nights in Rockdale observe an average temperature of 20.5°F (-6.4°C).Humidity
In Rockdale, the average relative humidity in December is 84%.Rainfall
In Rockdale, in December, during 5.7 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Rockdale, during the entire year, the rain falls for 134.9 days and collects up to 26.34" (669mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Rockdale. In Rockdale, in December, snow falls for 8.9 days, with typically accumulated 2.8" (71mm) of snow. In Rockdale, during the entire year, snow falls for 45 days and aggregates up to 18.19" (462mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:08 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:31 pm CST.
Sunshine
In Rockdale, the average sunshine in December is 3.8h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Rockdale. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum daily UV index of 1 during December morphs into the following directions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
How cold is it in Rockdale in December?
What is the average humidity in December in Rockdale?
How much does it rain in Rockdale in December?
How much does it snow in Rockdale in December?
What is the month with the shortest days in Rockdale?
How many hours of daylight does Rockdale have in December?
What time are sunrise and sunset in December in Rockdale?
How many hours of sunshine does Rockdale have in December?
What is the month with the lowest UV index in Rockdale?
What is the UV index reading in December in Rockdale?
Average temperature in December
Rockdale, WI
- Average high temperature in December: 30.4°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in December: 20.5°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in December
Rockdale, WI
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Rockdale, WI
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Rockdale, WI
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Rockdale, WI
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is June (3.5").
The driest months (with the least rainfall) are January and February (1.1").
Average rainfall days in December
Rockdale, WI
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (4 days).
Average snowfall in December
Rockdale, WI
- Average snowfall in December: 2.8"
The month with the highest snowfall is January (4.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rockdale, WI
- Average snowfall days in December: 8.9 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rockdale, WI
- 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: 3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in December
Rockdale, WI
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is December (17.5 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in December
Rockdale, WI
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Rockdale, WI
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Rockdale, WI
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Rockdale, Wisconsin, USA
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