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
December
Weather in December
Temperature
A mild shift in the average high-temperature occurs in December, reducing from a moderately hot 76.5°F (24.7°C) in November to an agreeable 70.7°F (21.5°C). In Harlingen, the average temperature during the nights of December drops to a moderate 58.1°F (14.5°C).Humidity
In Harlingen, the average relative humidity in December is 72%.Rainfall
In Harlingen, in December, during 5.5 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. Throughout the year, there are 79.8 rainfall days, and 5.24" (133mm) of precipitation is accumulated.Snowfall
In Harlingen, snow does not fall in January, March through December.Daylight
The month with the shortest days in Harlingen is December, with an average of 10h and 30min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 5:38 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 5:50 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 5.1h 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 rays for the average person.Note: A maximum daily UV index of 4 during December morphs into the following directions:
Take precautions - Protection against sunburn is recommended. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What is the average humidity in December?
How much does it rain in Harlingen in December?
When it does not snow?
What is the month with the shortest days?
How many hours of daylight does Harlingen have in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Harlingen have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Harlingen, TX
- Average high temperature in December: 70.7°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (68.7°F).
- Average low temperature in December: 58.1°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 (55.4°F).
Average pressure in December
Harlingen, TX
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Harlingen, TX
- Average wind speed in December: 10.5mph
The windiest months (with the highest average wind speed) are March and April (12.1mph).
The calmest month (with the lowest average wind speed) is September (8.9mph).
Average humidity in December
Harlingen, TX
- Average humidity in December: 72%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (65%).
Average rainfall in December
Harlingen, TX
- Average rainfall in December: 0.24"
The wettest month (with the highest rainfall) is July (0.87").
The driest month (with the least rainfall) is February (0.16").
Average rainfall days in December
Harlingen, TX
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is September (11.5 days).
The month with the least rainy days is February (4.7 days).
Average snowfall days in December
Harlingen, TX
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Harlingen, 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 1min
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 6min).
Average sunshine days in December
Harlingen, TX
- Average sunshine days in December: 22.9 days
The month with the most sunshine days is March (23.3 days).
The month with the least sunshine days is September (15.6 days).
Average UV index in December
Harlingen, TX
- Average UV index in December: 4
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in December
Harlingen, TX
- Average cloud cover in December: 45
The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in December
Harlingen, 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).