December weather forecastRio Grande City, TX
December
Weather in December
December, the first month of the winter in Rio Grande City, is also an agreeable month, with an average temperature fluctuating between 70.9°F (21.6°C) and 54.5°F (12.5°C).Temperature
With the onset of December, Rio Grande City's average high-temperature slightly adjusts, moderately receding from November's moderately hot 77.5°F (25.3°C) to a pleasant 70.9°F (21.6°C). Rio Grande City in December experiences a low-temperature average of 54.5°F (12.5°C).Humidity
The most humid month is December, with an average relative humidity of 65%.Rainfall
In Rio Grande City, in December, it is raining for 7.5 days, with typically 0.79" (20mm) of accumulated precipitation. In Rio Grande City, during the entire year, the rain falls for 98.5 days and collects up to 13.11" (333mm) of precipitation.Snowfall
March through December are months without snowfall.Daylight
December has the shortest days of the year, with an average of 10h and 30min of daylight.On the first day of December, sunrise is at 7:06 am and sunset at 5:42 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:54 pm CST.
Sunshine
With an average of 5.8h of sunshine, December has the least sunshine of the year.UV index
With an average maximum UV index of 4, December is the month with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: In December, the maximum UV index of 4 translates into these guidelines:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rio Grande City, TX
- Average high temperature in December: 70.9°F
The warmest month (with the highest average high temperature) is August (100°F).
The month with the lowest average high temperature is January (69.8°F).
- Average low temperature in December: 54.5°F
The month with the highest average low temperature is August (80.1°F).
The coldest month (with the lowest average low temperature) is January (52.7°F).
Average pressure in December
Rio Grande City, TX
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).
Average wind speed in December
Rio Grande City, TX
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is July (13.9mph).
The calmest month (with the lowest average wind speed) is December (9.2mph).
Average humidity in December
Rio Grande City, TX
- Average humidity in December: 65%
The month with the highest relative humidity is December (65%).
The month with the lowest relative humidity is August (53%).
Average rainfall in December
Rio Grande City, TX
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is September (2.56").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in December
Rio Grande City, TX
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is September (15.3 days).
The month with the least rainy days is February (5.8 days).
Average snowfall days in December
Rio Grande City, TX
- Average snowfall days in December: 0 days
The months with the highest number of snowfall days are January and February (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Rio Grande City, TX
- Average daylight in December: 10h and 30min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in December: 5h and 48min
The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
Rio Grande City, TX
- Average sunshine days in December: 21.1 days
The months with the most sunshine days are July and August (22.6 days).
The month with the least sunshine days is September (12.9 days).
Average UV index in December
Rio Grande City, TX
- Average UV index in December: 4
The months with the highest UV index are July and August (UV index 8).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in December
Rio Grande City, TX
- Average cloud cover in December: 36
The month with the most cloud cover is December (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Rio Grande City, 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).
