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 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
Transition into December subtly marks a drop in the average high-temperature, moderately moving from a warm 77.4°F (25.2°C) in November to an agreeable 71.2°F (21.8°C). Alton observes an average low-temperature of 55.9°F (13.3°C) during December.Humidity
May and December, with an average relative humidity of 67%, are the most humid months.Rainfall
February and December are months with the least rain in Alton when the rain falls for 3.4 days and typically aggregates up to 0.12" (3mm) of rain.Snowfall
March through December are months without snowfall in Alton.Daylight
December has the shortest days of the year in Alton, with an average of 10h and 30min of daylight.On the first day of December in Alton, sunrise is at 7:04 am and sunset at 5:40 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:52 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 5.6h of sunshine.UV index
With an average maximum UV index of 4, December is the month with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In December, a daily UV index of 4 turns into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Alton?
What are the most humid months in Alton?
What is the average humidity in December in Alton?
What is the driest month in Alton?
How many days does it rain in December in Alton?
When it does not snow in Alton?
Does it snow in Alton in December?
What is the month with the shortest days in Alton?
What is the average length of the day in December in Alton?
What time are sunrise and sunset in December in Alton?
What is the month with the least sunshine in Alton?
How many hours of sunshine does Alton have in December?
When is the lowest UV index in Alton?
What is the UV index intensity in December in Alton?
Average temperature in December
Alton, TX
- Average high temperature in December: 71.2°F
The warmest month (with the highest average high temperature) is August (99°F).
The month with the lowest average high temperature is January (69.4°F).
- Average low temperature in December: 55.9°F
The month with the highest average low temperature is August (79.9°F).
The coldest month (with the lowest average low temperature) is January (53.2°F).
Average pressure in December
Alton, TX
- Average pressure in December: 30.07"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
Alton, TX
- Average wind speed in December: 9.5mph
The windiest months (with the highest average wind speed) are May and July (12.9mph).
The calmest month (with the lowest average wind speed) is September (9.3mph).
Average humidity in December
Alton, TX
- Average humidity in December: 67%
The months with the highest relative humidity are May and December (67%).
The month with the lowest relative humidity is August (58%).
Average rainfall in December
Alton, TX
- Average rainfall in December: 0.12"
The wettest month (with the highest rainfall) is July (0.71").
The driest months (with the least rainfall) are February and December (0.12").
Average rainfall days in December
Alton, TX
- Average rainfall days in December: 3.4 days
The month with the highest number of rainy days is September (11.3 days).
The month with the least rainy days is February (2.9 days).
Average snowfall days in December
Alton, 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
Alton, TX
- Average daylight in December: 10h and 3min
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 4min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in December
Alton, TX
- Average sunshine days in December: 24.3 days
The month with the most sunshine days is March (24.9 days).
The month with the least sunshine days is September (15.6 days).
Average UV index in December
Alton, 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
Alton, TX
- Average cloud cover in December: 38
The month with the most cloud cover is December (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in December
Alton, 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).
Alton, Texas, USA
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