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
December brings a decrease in the average high-temperature, shifting from a frosty 48.7°F (9.3°C) in November to an icy 34.7°F (1.5°C). December witnesses an average low-temperature hovering around a subzero cold 21.7°F (-5.7°C).Humidity
In December, the average relative humidity in Mason City is 73%.Rainfall
In Mason City, in December, during 3.7 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. In Mason City, during the entire year, the rain falls for 93.8 days and collects up to 15.75" (400mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. The months with the most snowfall in Mason City are February and December, with an average 3.62" (92mm) of accumulated snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Mason City.On the first day of December, sunrise is at 7:44 am and sunset at 5:08 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 5:18 pm CST.
Sunshine
The average sunshine in December in Mason City, Nebraska, is 5.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Mason City. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Stay sun-safe with clothing that is both closely woven and worn loosely. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Mason City?
What is the average humidity in December in Mason City?
How much does it rain in Mason City in December?
What is the snowiest month in Mason City?
How much does it snow in Mason City in December?
What is the month with the shortest days in Mason City?
How many hours of daylight does Mason City have in December?
What time are sunrise and sunset in December in Mason City?
How long on average sun shines in December in Mason City?
What are the months with the lowest UV index in Mason City?
How high is the UV index in December in Mason City?
Average temperature in December
Mason City, NE
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in December: 21.7°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Mason City, NE
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Mason City, NE
- Average wind speed in December: 10.9mph
The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).
Average humidity in December
Mason City, NE
- Average humidity in December: 73%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is October (60%).
Average rainfall in December
Mason City, NE
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in December
Mason City, NE
- Average rainfall days in December: 3.7 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is December (3.7 days).
Average snowfall in December
Mason City, NE
- Average snowfall in December: 3.62"
The months with the highest snowfall are February and December (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mason City, NE
- Average snowfall days in December: 6.9 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mason City, NE
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in December
Mason City, NE
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is October (23 days).
The month with the least sunshine days is April (14.6 days).
Average UV index in December
Mason City, NE
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Mason City, NE
- Average cloud cover in December: 37
The months with the most cloud cover are January and February (Cloud cover 41).
The months with the least cloud cover are July and September (Cloud cover 23).
Average visibility in December
Mason City, NE
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Mason City, Nebraska, USA
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