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
With December's arrival, Merton's weather changes as the average high-temperature falls from a frosty 43.3°F (6.3°C) in November to a subzero cold 31.3°F (-0.4°C). Merton experiences an average low-temperature of 21.7°F (-5.7°C) in month of December.Humidity
In December, the average relative humidity in Merton is 83%.Rainfall
In Merton, in December, during 7.6 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, in Merton, Wisconsin, there are 149.2 rainfall days, and 28.54" (725mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Merton, in December, snow falls for 12.6 days, with typically accumulated 3.94" (100mm) of snow. In Merton, during the entire year, snow falls for 58.7 days and aggregates up to 20.47" (520mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:05 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:28 pm CST.
Sunshine
The average sunshine in December in Merton, Wisconsin, is 3.8h.UV index
The months with the lowest UV index in Merton are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: In December, an average UV index of 1 transforms into the following instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
How cold is December in Merton?
What is the average humidity in December in Merton?
How much does it rain in Merton in December?
How many days does it snow in December in Merton?
What is the month with the shortest days in Merton?
What is the average length of the day in December in Merton?
What time are sunrise and sunset in December in Merton?
How long on average sun shines in December in Merton?
When is the lowest UV index in Merton?
What is the UV index intensity in December in Merton?
Average temperature in December
Merton, WI
- Average high temperature in December: 31.3°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in December: 21.7°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in December
Merton, WI
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Merton, WI
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in December
Merton, WI
- Average humidity in December: 83%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in December
Merton, WI
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is February (1.46").
Average rainfall days in December
Merton, WI
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in December
Merton, WI
- Average snowfall in December: 3.94"
The month with the highest snowfall is January (5.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Merton, WI
- Average snowfall days in December: 12.6 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Merton, 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 August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Merton, WI
- Average sunshine days in December: 13.6 days
The month with the most sunshine days is November (15.9 days).
The months with the least sunshine days are June and July (10.3 days).
Average UV index in December
Merton, 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 and December (UV index 1).
Average cloud cover in December
Merton, WI
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Merton, WI
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Merton, Wisconsin, USA
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