December weather forecastEphraim, WI
December
Weather in December
December welcomes the winter season in Ephraim, with temperatures continuing their downward trend from November. With the chill setting in, the first real snowfall of the season occurs, measuring up to 2.99" (76mm). The daylight hours are noticeably shorter, while the sea temperatures mark their lowest levels. A sharp hike in snowfall days possibly defines the weather during this month. Overall, December marks the advent of winter in Ephraim with a considerable fall in temperatures and a steady increase in snowfall.Temperature
The onset of December brings a small change in high-temperatures, falling from an icy 41.7°F (5.4°C) in November to a freezing cold 31.1°F (-0.5°C). Ephraim marks an average drop to a still subzero cold 25.5°F (-3.6°C) during nighttime in December, following the high of the day.Humidity
The average relative humidity in December is 81%.Rainfall
In Ephraim, during December, the rain falls for 7.5 days and regularly aggregates up to 2.09" (53mm) of precipitation. Throughout the year, there are 141.7 rainfall days, and 26.93" (684mm) of precipitation is accumulated.Snowfall
Months with snowfall in Ephraim are January through May, October through December. In December, it is snowing for 12.4 days. Throughout December, 2.99" (76mm) of snow is accumulated. Throughout the year, there are 62.3 snowfall days, and 15.83" (402mm) of snow is accumulated.Ocean temperature
In Ephraim, Wisconsin, in December, the average water temperature is 41°F (5°C).Note: Unprotected swimming in 41°F (5°C) is dangerous due to potential cold shock. Especially when temperatures go below 50°F (10°C), leading to hyperventilation.
Daylight
The month with the shortest days in Ephraim, Wisconsin, is December, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:08 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:16 pm CST.
Sunshine
In Ephraim, Wisconsin, the average sunshine in December is 3.2h.UV index
The months with the lowest UV index in Ephraim are January, March and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 1 in December leads to these recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ephraim, WI
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is August (69.6°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in December: 25.5°F
The month with the highest average low temperature is August (63°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in December
Ephraim, WI
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Ephraim, WI
- Average wind speed in December: 15.5mph
The windiest month (with the highest average wind speed) is December (15.5mph).
The calmest months (with the lowest average wind speed) are June and July (9.6mph).
Average humidity in December
Ephraim, WI
- Average humidity in December: 81%
The months with the highest relative humidity are January and June (84%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Ephraim, WI
- Average rainfall in December: 2.09"
The wettest month (with the highest rainfall) is October (3.07").
The driest months (with the least rainfall) are January and February (1.38").
Average rainfall days in December
Ephraim, WI
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is August (15.6 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in December
Ephraim, WI
- Average snowfall in December: 2.99"
The month with the highest snowfall is February (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Ephraim, WI
- Average snowfall days in December: 12.4 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Ephraim, WI
- Average sea temperature in December: 41°F
The best month for swimming (with the highest average sea temperature) is August (64°F).
The coldest months (with the lowest average sea temperature) are March and April (36°F).
Average daylight in December /
Average sunshine in December
Ephraim, WI
- 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: 3h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Ephraim, WI
- Average sunshine days in December: 10.3 days
The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is January (8.3 days).
Average UV index in December
Ephraim, WI
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, March and December (UV index 1).
Average cloud cover in December
Ephraim, WI
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in December
Ephraim, WI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
