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
In Portales, the lowest average temperatures are observed in December, with a high of 50°F (10°C) and a low of 31.1°F (-0.5°C).Humidity
The most humid month is December, with an average relative humidity of 54%.Rainfall
In December, the rain falls for 4.3 days. Throughout December, 0.43" (11mm) of precipitation is accumulated. Throughout the year, there are 86.6 rainfall days, and 11.77" (299mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Portales, in December, snow falls for 3.5 days, with typically accumulated 1.18" (30mm) of snow. In Portales, during the entire year, snow falls for 12.8 days and aggregates up to 5.79" (147mm) of snow.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:41 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 4:54 pm MST.
Sunshine
January, February and December, with an average of 7h of sunshine, are months with the least sunshine.UV index
December is the month with the lowest UV index, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high daily UV index of 2 during December translates into the following directions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. During bright days, sunglasses that offer UVA and UVB defense are recommended. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
What are the temperatures in December?
What is the most humid month?
What is the average humidity in December in Portales?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Portales have in December?
What time are sunrise and sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does Portales have in December?
What is the month with the lowest UV index?
What is the UV index reading in December in Portales?
Average temperature in December
Portales, NM
- Average high temperature in December: 50°F
The warmest month (with the highest average high temperature) is June (90.7°F).
The month with the lowest average high temperature is December (50°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is December (31.1°F).
Average pressure in December
Portales, NM
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Portales, NM
- Average wind speed in December: 11.6mph
The windiest month (with the highest average wind speed) is April (13.3mph).
The calmest month (with the lowest average wind speed) is August (9.9mph).
Average humidity in December
Portales, NM
- Average humidity in December: 54%
The month with the highest relative humidity is December (54%).
The month with the lowest relative humidity is April (34%).
Average rainfall in December
Portales, NM
- Average rainfall in December: 0.43"
The wettest month (with the highest rainfall) is October (1.81").
The driest month (with the least rainfall) is November (0.28").
Average rainfall days in December
Portales, NM
- Average rainfall days in December: 4.3 days
The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is November (2.6 days).
Average snowfall in December
Portales, NM
- Average snowfall in December: 1.18"
The months with the highest snowfall are January and February (1.34").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Portales, NM
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is December (3.5 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
Portales, NM
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 7h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The months with the least sunshine are January, February and December (Average sunshine: 7h and 0min).
Average sunshine days in December
Portales, NM
- Average sunshine days in December: 23.7 days
The month with the most sunshine days is January (26.4 days).
The month with the least sunshine days is August (14 days).
Average UV index in December
Portales, NM
- Average UV index in December: 2
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 2).
Average cloud cover in December
Portales, NM
- Average cloud cover in December: 21
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 13).
Average visibility in December
Portales, NM
- 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).
Portales, New Mexico, USA
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