December weather forecastCastell, TX
December
Weather in December
The first month of the winter, December, is still a refreshing month in Castell, Texas, with an average temperature ranging between max 59.9°F (15.5°C) and min 42.3°F (5.7°C).Temperature
The commencement of December includes a gentle temperature shift, with the average high-temperature dropping a bit from an enjoyable 67.1°F (19.5°C) in November to a still refreshing 59.9°F (15.5°C). Castell experiences a nighttime temperature average of 42.3°F (5.7°C) during December.Humidity
The average relative humidity in December in Castell is 67%.Rainfall
In Castell, in December, it is raining for 8.8 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, in Castell, Texas, there are 123.8 rainfall days, and 21.18" (538mm) of precipitation is accumulated.Snowfall
Months with snowfall in Castell are January, February and December. December is the first month it typically snows. Throughout December, in the average 0.5 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 1.9 snowfall days, and 0.43" (11mm) of snow is accumulated.Daylight
With an average of 10h and 12min of daylight, December has the shortest days of the year in Castell.On the first day of December, sunrise is at 7:16 am and sunset at 5:34 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 5:45 pm CST.
Sunshine
The months with the least sunshine are November and December, with an average of 5.7h of sunshine.UV index
With an average maximum UV index of 3, December is the month with the lowest UV index in Castell, Texas. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 3 in December interprets into the following advice:
Be vigilant - Preventing sunburn is recommended. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Castell, TX
- Average high temperature in December: 59.9°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in December: 42.3°F
The month with the highest average low temperature is August (74.3°F).
The coldest month (with the lowest average low temperature) is January (40.8°F).
Average pressure in December
Castell, 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 (29.9"Hg).
Average wind speed in December
Castell, TX
- Average wind speed in December: 8.2mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is September (7mph).
Average humidity in December
Castell, TX
- Average humidity in December: 67%
The month with the highest relative humidity is May (72%).
The month with the lowest relative humidity is August (56%).
Average rainfall in December
Castell, TX
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is November (0.94").
Average rainfall days in December
Castell, TX
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Castell, TX
- Average snowfall in December: 0.08"
The month with the highest snowfall is February (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Castell, TX
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Castell, 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: 5h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are November and December (Average sunshine: 5h and 42min).
Average sunshine days in December
Castell, TX
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is May (13.2 days).
Average UV index in December
Castell, 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
Castell, TX
- Average cloud cover in December: 35
The month with the most cloud cover is May (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in December
Castell, 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).
