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 November transitions to December, the average high-temperature falls from a mild 60.6°F (15.9°C) to a cool 50.4°F (10.2°C). Throughout December, the temperature in Halley tends to fall to a consistent average low of 36°F (2.2°C).Humidity
In Halley, the average relative humidity in December is 72%.Rainfall
In Halley, during December, the rain falls for 9.2 days and regularly aggregates up to 1.93" (49mm) of precipitation. Throughout the year, in Halley, there are 138.1 rainfall days, and 30.71" (780mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Halley, in December, snow falls for 0.6 days, with typically accumulated 0.59" (15mm) of snow. In Halley, Oklahoma, during the entire year, snow falls for 5.4 days and aggregates up to 2.8" (71mm) of snow.Daylight
December has the shortest days of the year in Halley, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 7:13 am and sunset at 5:12 pm. On the last day of December, sunrise is at 7:30 am and sunset at 5:22 pm CST.
Sunshine
With an average of 5.5h of sunshine, December has the least sunshine of the year.UV index
December is the month with the lowest UV index, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
What is the usual temperature for Halley in December?
What is the average humidity in December in Halley?
How many days does it rain in December in Halley?
How much does it snow in Halley in December?
What is the month with the shortest days in Halley?
How many hours of daylight does Halley have in December?
When are sunrise and sunset in December in Halley?
What is the month with the least sunshine in Halley?
How long on average sun shines in December in Halley?
What is the month with the lowest UV index in Halley?
How high is the UV index in December in Halley?
Average temperature in December
Halley, OK
- Average high temperature in December: 50.4°F
The warmest month (with the highest average high temperature) is July (92.7°F).
The month with the lowest average high temperature is January (48.9°F).
- Average low temperature in December: 36°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).
Average pressure in December
Halley, OK
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Halley, OK
- Average wind speed in December: 8.2mph
The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Halley, OK
- Average humidity in December: 72%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (66%).
Average rainfall in December
Halley, OK
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is May (4.41").
The driest month (with the least rainfall) is February (1.73").
Average rainfall days in December
Halley, OK
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is January (7.7 days).
Average snowfall in December
Halley, OK
- Average snowfall in December: 0.59"
The month with the highest snowfall is February (1.14").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Halley, OK
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Halley, OK
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in December
Halley, OK
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is April (14.5 days).
Average UV index in December
Halley, OK
- 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
Halley, OK
- Average cloud cover in December: 37
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in December
Halley, OK
- 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).
Halley, Oklahoma, USA
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