December weather forecastRockport, TX
December
Weather in December
December in Rockport, Texas marks the beginning of winter, as the temperature takes a final plunge. The city experiences the least amount of sunshine in the year, indicating shorter days. The sea temperature reaches its annual low at 65.1°F (18.4°C), signaling the dominance of winter. Yet, despite the decrease in temperature, a slight increment in atmospheric pressure can be observed. However, the city's charm remains immune to the weather changes, promising a delightful winter getaway.Temperature
December heralds a minor drop in average high-temperature, sliding from November's agreeable 71.2°F (21.8°C) to a comfortable 64.2°F (17.9°C). A consistent average low-temperature of 55.4°F (13°C), with a minor variance from the daytime highs, is noted during the nights of December.Humidity
In December, the average relative humidity is 78%.Rainfall
In Rockport, Texas, in December, during 9.6 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. Throughout the year, there are 129.4 rainfall days, and 17.28" (439mm) of precipitation is accumulated.Snowfall
Months with snowfall are February and December. The months with the most snowfall are February and December, with an average 0.04" (1mm) of accumulated snow.Ocean temperature
In December, the average ocean temperature is 65.1°F (18.4°C).Note: For most, swimming in 65.1°F (18.4°C) is not a pleasant experience. As the temperature falls from 69.8°F (21°C) to 59°F (15°C), controlling one's breathing becomes more difficult.
Daylight
December has the shortest days of the year, with an average of 10h and 24min of daylight.On the first day of December, sunrise is at 7:02 am and sunset at 5:32 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:43 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 4.7h of sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in December converts into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rockport, TX
- Average high temperature in December: 64.2°F
The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is January (62.2°F).
- Average low temperature in December: 55.4°F
The month with the highest average low temperature is August (81.1°F).
The coldest month (with the lowest average low temperature) is January (53.1°F).
Average pressure in December
Rockport, TX
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are May and June (29.9"Hg).
Average wind speed in December
Rockport, TX
- Average wind speed in December: 11.4mph
The windiest month (with the highest average wind speed) is May (13.3mph).
The calmest month (with the lowest average wind speed) is September (10.4mph).
Average humidity in December
Rockport, TX
- Average humidity in December: 78%
The months with the highest relative humidity are February, March and May (80%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Rockport, TX
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is September (3.31").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in December
Rockport, TX
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is September (18 days).
The month with the least rainy days is February (8.2 days).
Average snowfall in December
Rockport, TX
- Average snowfall in December: 0.04"
The months with the highest snowfall are February and December (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Rockport, TX
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Rockport, TX
- Average sea temperature in December: 65.1°F
The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is February (61.1°F).
Average daylight in December /
Average sunshine in December
Rockport, TX
- Average daylight in December: 10h and 24min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in December: 4h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in December
Rockport, TX
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is March (20.3 days).
The month with the least sunshine days is September (10.6 days).
Average UV index in December
Rockport, TX
- Average UV index in December: 4
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in December
Rockport, TX
- Average cloud cover in December: 48
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in December
Rockport, 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).
