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
Start of December brings a slight shift in the average high-temperature, dipping a bit from November's comfortable 67.3°F (19.6°C) to a still refreshing 59.7°F (15.4°C). Mason's temperature in December lowers to a consistent average of 41.9°F (5.5°C) during the nights.Humidity
The average relative humidity in December is 63%.Rainfall
In Mason, in December, it is raining for 7 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, there are 111.3 rainfall days, and 17.13" (435mm) of precipitation is accumulated.Snowfall
Months with snowfall are January, February and December. December is the first month it typically snows in Mason. Throughout December, in the average 0.4 snowfall days, it receives 0.2" (5mm) of snow. In Mason, during the entire year, snow falls for 2.2 days and aggregates up to 0.59" (15mm) of snow.Daylight
December has the shortest days of the year, with an average of 10h and 12min of daylight.On the first day of the month, sunrise is at 7:17 am and sunset at 5:35 pm. On the last day of December, sunrise is at 7:34 am and sunset at 5:46 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 6h of sunshine.UV index
With an average maximum UV index of 3, December is the month with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 3 suggests these recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Experience reduced UV exposure by about half when donning a wide-brim hat. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Mason?
What is the average humidity in December?
How much does it rain in December?
When does it start to snow?
What is the month with the shortest days?
How many hours of daylight does Mason have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Mason, TX
- Average high temperature in December: 59.7°F
The warmest months (with the highest average high temperature) are July and August (94.5°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in December: 41.9°F
The month with the highest average low temperature is August (73.6°F).
The coldest month (with the lowest average low temperature) is January (40.3°F).
Average pressure in December
Mason, TX
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are May and June (29.89"Hg).
Average wind speed in December
Mason, TX
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is September (8.3mph).
Average humidity in December
Mason, TX
- Average humidity in December: 63%
The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is August (53%).
Average rainfall in December
Mason, TX
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days in December
Mason, TX
- Average rainfall days in December: 7 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in December
Mason, TX
- Average snowfall in December: 0.2"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Mason, TX
- Average snowfall days in December: 0.4 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Mason, TX
- Average daylight in December: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in December: 6h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in December
Mason, TX
- Average sunshine days in December: 22 days
The month with the most sunshine days is January (24.6 days).
The month with the least sunshine days is May (14.3 days).
Average UV index in December
Mason, TX
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Mason, TX
- Average cloud cover in December: 31
The months with the most cloud cover are March and May (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in December
Mason, TX
- 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, Texas, USA
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