December weather forecastMertzon, TX
December
Weather in December
December, the first month of the winter in Mertzon, is also a moderate month, with an average temperature varying between 40.8°F (4.9°C) and 58.6°F (14.8°C).Temperature
The coldest months are January and December, with an average high-temperature of 58.6°F (14.8°C).Humidity
The average relative humidity in December in Mertzon, Texas, is 57%.Rainfall
In Mertzon, during December, the rain falls for 5.5 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, there are 89.8 rainfall days, and 15.43" (392mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall in Mertzon, Texas. In Mertzon, in December, during 0.4 snowfall days, 0.12" (3mm) of snow is typically accumulated. In Mertzon, during the entire year, snow falls for 2.5 days and aggregates up to 1.22" (31mm) of snow.Daylight
With an average of 10h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:24 am and sunset at 5:40 pm. On the last day of December, sunrise is at 7:41 am and sunset at 5:51 pm CST.
Sunshine
With an average of 6.4h of sunshine, December has the least sunshine of the year.UV index
The month with the lowest UV index in Mertzon is December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 3 in December interprets into the following recommendations:
Act with care - The need to guard against sun damage is communicated. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mertzon, TX
- Average high temperature in December: 58.6°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The months with the lowest average high temperature are January and December (58.6°F).
- Average low temperature in December: 40.8°F
The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (39.6°F).
Average pressure in December
Mertzon, 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 (29.87"Hg).
Average wind speed in December
Mertzon, TX
- Average wind speed in December: 10.5mph
The windiest month (with the highest average wind speed) is April (13.7mph).
The calmest month (with the lowest average wind speed) is September (9.6mph).
Average humidity in December
Mertzon, TX
- Average humidity in December: 57%
The month with the highest relative humidity is November (58%).
The month with the lowest relative humidity is August (47%).
Average rainfall in December
Mertzon, TX
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is October (2.36").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Mertzon, TX
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (12 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in December
Mertzon, TX
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Mertzon, TX
- Average snowfall days in December: 0.4 days
The month with the highest number of snowfall days is February (1.1 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
Mertzon, TX
- Average daylight in December: 10h and 12min
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 24min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in December
Mertzon, TX
- Average sunshine days in December: 24 days
The month with the most sunshine days is January (25.8 days).
The month with the least sunshine days is May (16.3 days).
Average UV index in December
Mertzon, TX
- Average UV index in December: 3
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Mertzon, TX
- Average cloud cover in December: 26
The month with the most cloud cover is March (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in December
Mertzon, 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).
