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
Temperature readings reach their annual highs in December, averaging 27.9°F (-2.3°C) and a minimum average of 14.7°F (-9.6°C).Humidity
In Twisp, the average relative humidity in December is 90%.Rainfall
December is the month with the most rainfall in Twisp. Rain falls for 10.2 days and accumulates 2.52" (64mm) of precipitation.Snowfall
Months with snowfall are January through April, September through December. The month with the most snowfall is December, when snow falls for 15.5 days and typically aggregates up to 12.28" (312mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 24min of daylight.On the first day of the month, sunrise is at 7:31 am and sunset at 4:08 pm. On the last day of December, sunrise is at 7:51 am and sunset at 4:16 pm PST.
Sunshine
In December, the average sunshine is 4.5h.UV index
In Twisp, Washington, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
How cold is it in December?
What is the average humidity in December?
What is the wettest month in Twisp?
How many days does it rain in December?
When does it snow the most?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Twisp have in December?
When is the sunrise / sunset in December in Twisp?
How many hours of sunshine does Twisp have in December?
What is the UV index reading in December?
Average temperature in December
Twisp, WA
- Average high temperature in December: 27.9°F
The warmest month (with the highest average high temperature) is August (76.8°F).
The month with the lowest average high temperature is December (27.9°F).
- Average low temperature in December: 14.7°F
The month with the highest average low temperature is August (48.9°F).
The coldest month (with the lowest average low temperature) is December (14.7°F).
Average pressure in December
Twisp, WA
- Average pressure in December: 30.14"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
Twisp, WA
- Average wind speed in December: 3.5mph
The windiest month (with the highest average wind speed) is July (5.1mph).
The calmest months (with the lowest average wind speed) are January and December (3.5mph).
Average humidity in December
Twisp, WA
- Average humidity in December: 90%
The months with the highest relative humidity are January and February (92%).
The months with the lowest relative humidity are July and August (51%).
Average rainfall in December
Twisp, WA
- Average rainfall in December: 2.52"
The wettest month (with the highest rainfall) is December (2.52").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Twisp, WA
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is March (17.1 days).
The month with the least rainy days is August (5.7 days).
Average snowfall in December
Twisp, WA
- Average snowfall in December: 12.28"
The month with the highest snowfall is December (12.28").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in December
Twisp, WA
- Average snowfall days in December: 15.5 days
The month with the highest number of snowfall days is December (15.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Twisp, WA
- Average daylight in December: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 4h and 3min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Twisp, WA
- Average sunshine days in December: 12.1 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is March (8.9 days).
Average UV index in December
Twisp, 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 and November (UV index 1).
Average cloud cover in December
Twisp, WA
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in December
Twisp, WA
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
Twisp, Washington, USA
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