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
December, having an average high-temperature of 33.3°F (0.7°C) and an average low-temperature of 21.4°F (-5.9°C), is the coldest month.Humidity
The average relative humidity in December is 85%.Rainfall
The month with the most rainfall is December, when the rain falls for 9.4 days and typically aggregates up to 1.3" (33mm) of precipitation.Snowfall
January through April, September through December are months with snowfall. The month with the most snowfall in Regal is December, when snow falls for 8.7 days and typically aggregates up to 4.65" (118mm) of snow.Daylight
With an average of 8h and 36min of daylight, December has the shortest days of the year.On the first day of December in Regal, sunrise is at 7:27 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:22 pm PST.
Sunshine
January and December, with an average of 4.8h of sunshine, are months with the least sunshine in Regal.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Regal. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 2 in December translates into these instructions:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
What time of the year is the coldest in Regal?
How cold is December in Regal?
What is the average humidity in December in Regal?
What is the rainiest month in Regal?
How much does it rain in Regal in December?
When does it snow the most in Regal?
How many days does it snow in December in Regal?
What is the month with the shortest days in Regal?
How many hours of daylight does Regal have in December?
When is the sunrise / sunset in December in Regal?
What is the month with the least sunshine in Regal?
How many hours of sunshine does Regal have in December?
When is the lowest UV index in Regal?
What is the UV index reading in December in Regal?
Average temperature in December
Regal, WA
- Average high temperature in December: 33.3°F
The warmest months (with the highest average high temperature) are July and August (82°F).
The month with the lowest average high temperature is December (33.3°F).
- Average low temperature in December: 21.4°F
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure in December
Regal, WA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in December
Regal, WA
- Average wind speed in December: 4.2mph
The windiest month (with the highest average wind speed) is June (8.9mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in December
Regal, WA
- Average humidity in December: 85%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are July and August (46%).
Average rainfall in December
Regal, WA
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Regal, WA
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (2.8 days).
Average snowfall in December
Regal, WA
- Average snowfall in December: 4.65"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in December
Regal, WA
- Average snowfall days in December: 8.7 days
The months with the highest number of snowfall days are January and December (8.7 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Regal, WA
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 4h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 48min).
Average sunshine days in December
Regal, WA
- Average sunshine days in December: 15.3 days
The month with the most sunshine days is July (27.1 days).
The month with the least sunshine days is February (13.5 days).
Average UV index in December
Regal, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Regal, WA
- Average cloud cover in December: 47
The month with the most cloud cover is January (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in December
Regal, WA
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
Regal, Washington, USA
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