December weather forecastSouth Colby, WA
December
Weather in December
The first month of the winter, December, is also a frosty month in South Colby, Washington, with an average temperature ranging between min 34.9°F (1.6°C) and max 43.2°F (6.2°C).Temperature
With average high temperatures of 43.2°F (6.2°C) and lows of 34.9°F (1.6°C), December is the coldest month.Humidity
December is the most humid month, with an average relative humidity of 87%.Rainfall
The wettest months are January and December, with an average 2.05" (52mm) of rainfall.Snowfall
Months with snowfall are January through March, November and December. In South Colby, in December, snow falls for 1 days, with typically accumulated 0.12" (3mm) of snow. In South Colby, during the entire year, snow falls for 7 days and aggregates up to 2.36" (60mm) of snow.Daylight
December has the shortest days of the year in South Colby, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 7:37 am and sunset at 4:20 pm. On the last day of December, sunrise is at 7:57 am and sunset at 4:29 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 4.1h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high daily UV index of 2 during December translates into the following directions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Enhance your sun protection with tightly woven, yet airy clothing. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
South Colby, WA
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (43.2°F).
- Average low temperature in December: 34.9°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.9°F).
Average pressure in December
South Colby, WA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in December
South Colby, WA
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is March (5.5mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).
Average humidity in December
South Colby, WA
- Average humidity in December: 87%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
South Colby, WA
- Average rainfall in December: 2.05"
The wettest months (with the highest rainfall) are January and December (2.05").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in December
South Colby, WA
- Average rainfall days in December: 14.3 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (5.4 days).
Average snowfall in December
South Colby, WA
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
South Colby, WA
- Average snowfall days in December: 1 days
The month with the highest number of snowfall days is February (2.8 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
South Colby, WA
- Average daylight in December: 8h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 4h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in December
South Colby, WA
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in December
South Colby, 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, November and December (UV index 2).
Average cloud cover in December
South Colby, WA
- Average cloud cover in December: 58
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
South Colby, WA
- Average visibility in December: 5mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
