December weather forecastRockport, WA
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Rockport, Washington, with temperature in the range of an average high of 30.7°F (-0.7°C) and an average low of 19.6°F (-6.9°C).Temperature
With average high temperatures of 30.7°F (-0.7°C) and lows of 19.6°F (-6.9°C), December is the coldest month.Humidity
In December, the average relative humidity is 90%.Rainfall
In Rockport, in December, during 4.2 rainfall days, 7.95" (202mm) of precipitation is typically accumulated. In Rockport, during the entire year, the rain falls for 124 days and collects up to 55.28" (1404mm) of precipitation.Snowfall
Months with snowfall in Rockport are January through June, September through December. In Rockport, during December, snow falls for 19.5 days and regularly aggregates up to 63.27" (1607mm) of snow. In Rockport, during the entire year, snow falls for 142 days and aggregates up to 321.93" (8177mm) of snow.Daylight
The month with the shortest days in Rockport is December, with an average of 8h and 24min of daylight.On the first day of December, sunrise is at 7:37 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:21 pm PST.
Sunshine
In Rockport, the average sunshine in December is 3.9h.UV index
In Rockport, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 2 in December translates into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rockport, WA
- Average high temperature in December: 30.7°F
The warmest month (with the highest average high temperature) is August (71.2°F).
The month with the lowest average high temperature is December (30.7°F).
- Average low temperature in December: 19.6°F
The month with the highest average low temperature is August (43.7°F).
The coldest month (with the lowest average low temperature) is December (19.6°F).
Average pressure in December
Rockport, WA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in December
Rockport, WA
- Average wind speed in December: 4.3mph
The windiest month (with the highest average wind speed) is January (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in December
Rockport, WA
- Average humidity in December: 90%
The months with the highest relative humidity are January, February and March (91%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in December
Rockport, WA
- Average rainfall in December: 7.95"
The wettest month (with the highest rainfall) is January (9.25").
The driest month (with the least rainfall) is August (0.87").
Average rainfall days in December
Rockport, WA
- Average rainfall days in December: 4.2 days
The month with the highest number of rainy days is June (17.5 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Rockport, WA
- Average snowfall in December: 63.27"
The month with the highest snowfall is January (71.57").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Rockport, WA
- Average snowfall days in December: 19.5 days
The month with the highest number of snowfall days is March (22.8 days).
The month with the least snowfall days is August (0 days).
Average daylight in December /
Average sunshine in December
Rockport, WA
- Average daylight in December: 8h and 24min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 3h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Rockport, WA
- Average sunshine days in December: 11.5 days
The month with the most sunshine days is August (18.1 days).
The month with the least sunshine days is April (6.5 days).
Average UV index in December
Rockport, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October and November (UV index 1).
Average cloud cover in December
Rockport, WA
- Average cloud cover in December: 59
The month with the most cloud cover is March (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Rockport, WA
- Average visibility in December: 4mi
The months with the highest visibility are June, July, August and September (5mi).
The months with the lowest visibility are January and March (3mi).
