December weather forecastKittitas, WA
December
Weather in December
The first month of the winter, December, is also a wintry month in Kittitas, Washington, with an average temperature varying between 33.3°F (0.7°C) and 21.4°F (-5.9°C).Temperature
Temperature records mark December as the coldest month, with highs averaging 33.3°F (0.7°C) and lows at 21.4°F (-5.9°C).Humidity
In Kittitas, the average relative humidity in December is 85%.Rainfall
December is the month with the most rainfall in Kittitas. Rain falls for 9.4 days and accumulates 1.3" (33mm) of precipitation.Snowfall
January through April, September through December are months with snowfall in Kittitas, Washington. The month with the most snowfall is December, when snow falls for 8.7 days and typically aggregates up to 4.65" (118mm) of snow.Daylight
December has the shortest days of the year in Kittitas, with an average of 8h and 36min of daylight.On the first day of December, 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
The months with the least sunshine in Kittitas are January and December, with an average of 4.8h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. To protect against the Sun's most potent rays, avoid direct exposure around midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Kittitas, 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
Kittitas, 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
Kittitas, 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
Kittitas, 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
Kittitas, 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
Kittitas, 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
Kittitas, 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
Kittitas, 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
Kittitas, WA
- Average daylight in December: 8h and 36min
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 48min
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
Kittitas, 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
Kittitas, 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
Kittitas, 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
Kittitas, 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).
