December weather forecastFinley, WA
December
Weather in December
The first month of the winter, December, is also an icy month in Finley, Washington, with an average temperature varying between 27.9°F (-2.3°C) and 38.3°F (3.5°C).Temperature
Finley's December weather reaches an average high of 38.3°F (3.5°C) and an average low of 27.9°F (-2.3°C), making it the coldest month.Humidity
In December, the average relative humidity in Finley is 78%.Rainfall
The wettest months are March and December, with an average 0.94" (24mm) of rainfall.Snowfall
January through March, November and December are months with snowfall. In December, it is snowing for 3.1 days. Throughout December, 1.57" (40mm) of snow is accumulated. Throughout the year, in Finley, there are 9.7 snowfall days, and 5.2" (132mm) of snow is accumulated.Daylight
December has the shortest days of the year in Finley, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:18 am and sunset at 4:11 pm. On the last day of December, sunrise is at 7:38 am and sunset at 4:20 pm PST.
Sunshine
The average sunshine in December is 5.5h.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 value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Finley, WA
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (38.3°F).
- Average low temperature in December: 27.9°F
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (27.9°F).
Average pressure in December
Finley, WA
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in December
Finley, WA
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).
Average humidity in December
Finley, WA
- Average humidity in December: 78%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is July (35%).
Average rainfall in December
Finley, WA
- Average rainfall in December: 0.94"
The wettest months (with the highest rainfall) are March and December (0.94").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in December
Finley, WA
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in December
Finley, WA
- Average snowfall in December: 1.57"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Finley, WA
- Average snowfall days in December: 3.1 days
The month with the highest number of snowfall days is December (3.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Finley, WA
- Average daylight in December: 8h and 42min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 5h and 30min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
Finley, WA
- Average sunshine days in December: 16 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is March (15.4 days).
Average UV index in December
Finley, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Finley, WA
- Average cloud cover in December: 43
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in December
Finley, WA
- 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).
