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
The commencement of December involves a temperature shift, with the average high-temperature dropping from a wintry 41.4°F (5.2°C) in November to a freezing cold 28°F (-2.2°C). Throughout the month of December, Grand Marsh sees a steady low-temperature average of 18°F (-7.8°C).Humidity
In December, the average relative humidity is 85%.Rainfall
In Grand Marsh, during December, the rain falls for 5 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, in Grand Marsh, there are 129.4 rainfall days, and 26.3" (668mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 11.9 days. Throughout December, 4.45" (113mm) of snow is accumulated. In Grand Marsh, during the entire year, snow falls for 55 days and aggregates up to 21.77" (553mm) of snow.Daylight
The month with the shortest days in Grand Marsh is December, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 7:13 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:31 pm CST.
Sunshine
The average sunshine in December is 3.6h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Grand Marsh?
When is the sunrise / sunset in December?
How long on average sun shines in December?
When is the lowest UV index in Grand Marsh?
How high is the UV index in December?
Average temperature in December
Grand Marsh, WI
- Average high temperature in December: 28°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (21.7°F).
- Average low temperature in December: 18°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in December
Grand Marsh, WI
- Average pressure in December: 30.09"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Grand Marsh, WI
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Grand Marsh, WI
- Average humidity in December: 85%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Grand Marsh, WI
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is June (3.5").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in December
Grand Marsh, WI
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is January (3.9 days).
Average snowfall in December
Grand Marsh, WI
- Average snowfall in December: 4.45"
The month with the highest snowfall is January (4.96").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Grand Marsh, WI
- Average snowfall days in December: 11.9 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
Grand Marsh, WI
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Grand Marsh, WI
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in December
Grand Marsh, WI
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Grand Marsh, WI
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in December
Grand Marsh, WI
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Grand Marsh, Wisconsin, USA
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