December weather forecastWest Pasco, WA
December
Weather in December
December, the first month of the winter in West Pasco, is still a cold month, with an average temperature fluctuating between 38.3°F (3.5°C) and 27.9°F (-2.3°C).Temperature
In West Pasco, the lowest average temperatures are observed in December, with a high of 38.3°F (3.5°C) and a low of 27.9°F (-2.3°C).Humidity
In West Pasco, the average relative humidity in December is 78%.Rainfall
The wettest months are March and December, with an average 0.94" (24mm) of rainfall.Snowfall
Months with snowfall are January through March, November and December. In West Pasco, in December, during 3.1 snowfall days, 1.57" (40mm) of snow is typically accumulated. In West Pasco, Washington, during the entire year, snow falls for 9.7 days and aggregates up to 5.2" (132mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 42min of daylight.On the first day of December in West Pasco, sunrise is at 7:19 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:20 pm PST.
Sunshine
In December, the average sunshine is 5.5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 2 during December leads to these advisories:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. To protect against the Sun's most potent rays, avoid direct exposure around midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
West Pasco, 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
West Pasco, 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
West Pasco, 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
West Pasco, 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
West Pasco, 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
West Pasco, 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
West Pasco, 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
West Pasco, 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
West Pasco, 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
West Pasco, 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
West Pasco, 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
West Pasco, 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
West Pasco, 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).
