December weather forecastSylvester, TX
December
Weather in December
December, the first month of the winter in Sylvester, is still a mild month, with an average temperature varying between 56.3°F (13.5°C) and 38.5°F (3.6°C).Temperature
Sylvester's temperature records reveal December as the coldest month, marked by average highs of 56.3°F (13.5°C) and lows of 38.5°F (3.6°C).Humidity
The months with the highest humidity are September and December, with an average relative humidity of 55%.Rainfall
In December, in Sylvester, the rain falls for 4.1 days. Throughout December, 0.83" (21mm) of precipitation is accumulated. In Sylvester, during the entire year, the rain falls for 87.8 days and collects up to 14.92" (379mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Sylvester, in December, during 1.1 snowfall days, 0.63" (16mm) of snow is typically accumulated. In Sylvester, during the entire year, snow falls for 5.1 days and aggregates up to 3.03" (77mm) of snow.Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of December, sunrise is at 7:25 am and sunset at 5:34 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:45 pm CST.
Sunshine
November and December, with an average of 6.6h of sunshine, are months with the least sunshine in Sylvester.UV index
December is the month with the lowest UV index in Sylvester, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 3 transforms into these recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sylvester, TX
- Average high temperature in December: 56.3°F
The warmest month (with the highest average high temperature) is August (96.6°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in December: 38.5°F
The month with the highest average low temperature is July (76.6°F).
The coldest month (with the lowest average low temperature) is January (37.6°F).
Average pressure in December
Sylvester, TX
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Sylvester, TX
- Average wind speed in December: 10.6mph
The windiest month (with the highest average wind speed) is April (13.8mph).
The calmest month (with the lowest average wind speed) is September (9.9mph).
Average humidity in December
Sylvester, TX
- Average humidity in December: 55%
The months with the highest relative humidity are September and December (55%).
The month with the lowest relative humidity is August (44%).
Average rainfall in December
Sylvester, TX
- Average rainfall in December: 0.83"
The wettest month (with the highest rainfall) is May (2.28").
The driest months (with the least rainfall) are January and February (0.59").
Average rainfall days in December
Sylvester, TX
- Average rainfall days in December: 4.1 days
The month with the highest number of rainy days is September (11.7 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in December
Sylvester, TX
- Average snowfall in December: 0.63"
The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Sylvester, TX
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is February (1.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sylvester, TX
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The months with the least sunshine are November and December (Average sunshine: 6h and 36min).
Average sunshine days in December
Sylvester, TX
- Average sunshine days in December: 25 days
The month with the most sunshine days is January (26.7 days).
The month with the least sunshine days is September (16.1 days).
Average UV index in December
Sylvester, TX
- Average UV index in December: 3
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Sylvester, TX
- Average cloud cover in December: 25
The months with the most cloud cover are March, September and December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Sylvester, 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).
