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 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
As December arrives, Portland's weather displays a minor decrease in high-temperatures, transitioning from November's agreeable 71.6°F (22°C) to an enjoyable 65.3°F (18.5°C). Portland encounters an average low-temperature of 55°F (12.8°C) during December nights.Humidity
The average relative humidity in December in Portland, Texas, is 76%.Rainfall
In December, in Portland, the rain falls for 10.2 days. Throughout December, 0.91" (23mm) of precipitation is accumulated. In Portland, during the entire year, the rain falls for 126.7 days and collects up to 13.78" (350mm) of precipitation.Snowfall
Months with snowfall in Portland are February and December. The months with the most snowfall are February and December, with an average 0.04" (1mm) of accumulated snow.Daylight
With an average of 10h and 24min of daylight, December has the shortest days of the year in Portland.On the first day of December in Portland, sunrise is at 7:03 am and sunset at 5:33 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:45 pm CST.
Sunshine
December has the least sunshine of the year in Portland, with an average of 4.8h of sunshine.UV index
January and December, with an average maximum UV index of 4, are months with the lowest UV index in Portland. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In December, an average UV index of 4 transforms into the following instructions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Portland in December?
What is the average humidity in December in Portland?
How many days does it rain in December in Portland?
When does it snow the most in Portland?
When does it start to snow in Portland?
What is the month with the shortest days in Portland?
How many hours of daylight does Portland have in December?
What time are sunrise and sunset in December in Portland?
What is the month with the least sunshine in Portland?
How many hours of sunshine does Portland have in December?
What are the months with the lowest UV index in Portland?
How high is the UV index in December in Portland?
Average temperature in December
Portland, TX
- Average high temperature in December: 65.3°F
The warmest month (with the highest average high temperature) is August (90.9°F).
The month with the lowest average high temperature is January (63.7°F).
- Average low temperature in December: 55°F
The month with the highest average low temperature is August (80.8°F).
The coldest month (with the lowest average low temperature) is January (52.3°F).
Average pressure in December
Portland, TX
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are May and June (29.89"Hg).
Average wind speed in December
Portland, TX
- Average wind speed in December: 10.5mph
The windiest month (with the highest average wind speed) is May (12.6mph).
The calmest month (with the lowest average wind speed) is September (9.6mph).
Average humidity in December
Portland, TX
- Average humidity in December: 76%
The months with the highest relative humidity are March and May (78%).
The months with the lowest relative humidity are August and October (71%).
Average rainfall in December
Portland, TX
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is September (2.64").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days in December
Portland, TX
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is September (17.9 days).
The month with the least rainy days is February (7.7 days).
Average snowfall in December
Portland, TX
- Average snowfall in December: 0.04"
The months with the highest snowfall are February and December (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Portland, TX
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Portland, TX
- Average daylight in December: 10h and 2min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in December
Portland, TX
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is September (10.4 days).
Average UV index in December
Portland, TX
- Average UV index in December: 4
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in December
Portland, TX
- Average cloud cover in December: 47
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in December
Portland, 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).
Portland, Texas, USA
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