December weather forecastOconomowoc, WI
December
Weather in December
December, the first month of the winter in Oconomowoc, is also a subzero cold month, with an average temperature ranging between min 20.8°F (-6.2°C) and max 30.7°F (-0.7°C).Temperature
In Oconomowoc, the average high-temperature in December decreases from a frosty 43.2°F (6.2°C) in November to a freezing cold 30.7°F (-0.7°C). Oconomowoc experiences a steady low-temperature of 20.8°F (-6.2°C) throughout December.Humidity
In December, the average relative humidity in Oconomowoc is 84%.Rainfall
February and December are months with the least rain when the rain falls for 6.2 days and typically aggregates up to 0.59" (15mm) of rain.Snowfall
January through April, October through December are months with snowfall in Oconomowoc. In December, in Oconomowoc, it is snowing for 10.6 days. Throughout December, 1.18" (30mm) of snow is accumulated. Throughout the year, in Oconomowoc, there are 47.6 snowfall days, and 7.4" (188mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December in Oconomowoc, sunrise is at 7:06 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:29 pm CST.
Sunshine
In December, the average sunshine is 3.8h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 1 in December translates into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Oconomowoc, WI
- Average high temperature in December: 30.7°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in December: 20.8°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in December
Oconomowoc, WI
- Average pressure in December: 30.09"Hg
The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Oconomowoc, WI
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Oconomowoc, WI
- Average humidity in December: 84%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Oconomowoc, WI
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is July (1.85").
The driest months (with the least rainfall) are February and December (0.59").
Average rainfall days in December
Oconomowoc, WI
- Average rainfall days in December: 6.2 days
The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in December
Oconomowoc, WI
- Average snowfall in December: 1.18"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Oconomowoc, WI
- Average snowfall days in December: 10.6 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Oconomowoc, WI
- Average daylight in December: 9h and 6min
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 48min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in December
Oconomowoc, WI
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (11.7 days).
Average UV index in December
Oconomowoc, WI
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Oconomowoc, WI
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July, August and September (Cloud cover 34).
Average visibility in December
Oconomowoc, 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).
