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 transition into December involves a small decrease in the average high-temperature, dipping slightly from an agreeable 68.4°F (20.2°C) in November to a refreshing 60.1°F (15.6°C). During December, Somerville witnesses a consistent average low-temperature of 45.5°F (7.5°C).Humidity
In December, the average relative humidity is 76%.Rainfall
In December, the rain falls for 12.7 days. Throughout December, 2.72" (69mm) of precipitation is accumulated. Throughout the year, there are 163.6 rainfall days, and 30.71" (780mm) of precipitation is accumulated.Snowfall
Months with snowfall are January and December. December is the first month it typically snows. Throughout December, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 0.8 snowfall days, and 0.31" (8mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 10h and 12min of daylight.On the first day of December in Somerville, sunrise is at 7:05 am and sunset at 5:25 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:36 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 5.1h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index, 3 during December, leads to the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What is the average humidity in December?
How many days does it rain in December in Somerville?
When does it start to snow in Somerville?
What is the month with the shortest days in Somerville?
What is the average length of the day 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?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Somerville, TX
- Average high temperature in December: 60.1°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (58.8°F).
- Average low temperature in December: 45.5°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (42.6°F).
Average pressure in December
Somerville, TX
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Somerville, TX
- Average wind speed in December: 7.6mph
The windiest months (with the highest average wind speed) are February and March (8.3mph).
The calmest month (with the lowest average wind speed) is September (5.7mph).
Average humidity in December
Somerville, TX
- Average humidity in December: 76%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is August (67%).
Average rainfall in December
Somerville, TX
- Average rainfall in December: 2.72"
The wettest month (with the highest rainfall) is May (4.29").
The driest month (with the least rainfall) is February (1.65").
Average rainfall days in December
Somerville, TX
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is September (16.5 days).
The month with the least rainy days is January (10.7 days).
Average snowfall in December
Somerville, TX
- Average snowfall in December: 0.04"
The month with the highest snowfall is January (0.28").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Somerville, TX
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Somerville, 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: 5h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in December
Somerville, TX
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is June (11 days).
Average UV index in December
Somerville, 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
Somerville, TX
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Somerville, TX
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, August, September, October, November and December (6mi).
The months with the lowest visibility are April, May, June and July (5mi).
Somerville, Texas, USA
Weather forecast for your location
2. Allow the app to use your location