December weather forecastRockaway Beach, OR
December
Weather in December
December, the first month of the winter in Rockaway Beach, is still a chilly month, with temperature in the range of an average low of 40.1°F (4.5°C) and an average high of 46.2°F (7.9°C).Temperature
Rockaway Beach, Oregon, reaches its lowest average temperatures in December, measuring 46.2°F (7.9°C) at the peak and 40.1°F (4.5°C) at the lowest.Humidity
In Rockaway Beach, the average relative humidity in December is 81%.Rainfall
December is the month with the most rainfall in Rockaway Beach. Rain falls for 14.9 days and accumulates 2.13" (54mm) of precipitation.Snowfall
In Rockaway Beach, snow does not fall in March through December.Ocean temperature
In Rockaway Beach, in December, the average water temperature is 50°F (10°C).Note: In 50°F (10°C), cold shock and rapid breathing can occur when swimming at temperatures below 50°F (10°C).
Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year in Rockaway Beach.On the first day of December, sunrise is at 7:36 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 4:42 pm PST.
Sunshine
The average sunshine in December is 4.3h.UV index
The months with the lowest UV index are February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rockaway Beach, OR
- Average high temperature in December: 46.2°F
The warmest month (with the highest average high temperature) is August (66.2°F).
The month with the lowest average high temperature is December (46.2°F).
- Average low temperature in December: 40.1°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).
Average pressure in December
Rockaway Beach, OR
- Average pressure in December: 30.07"Hg
The months with the highest atmospheric pressure are January and April (30.08"Hg).
The month with the lowest atmospheric pressure is September (30.02"Hg).
Average wind speed in December
Rockaway Beach, OR
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Rockaway Beach, OR
- Average humidity in December: 81%
The month with the highest relative humidity is August (83%).
The month with the lowest relative humidity is May (80%).
Average rainfall in December
Rockaway Beach, OR
- Average rainfall in December: 2.13"
The wettest month (with the highest rainfall) is December (2.13").
The driest month (with the least rainfall) is August (0.2").
Average rainfall days in December
Rockaway Beach, OR
- Average rainfall days in December: 14.9 days
The month with the highest number of rainy days is March (16.1 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in December
Rockaway Beach, OR
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Rockaway Beach, OR
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (1.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in December
Rockaway Beach, OR
- Average sea temperature in December: 49.9°F
The best month for swimming (with the highest average sea temperature) is July (57.2°F).
The coldest month (with the lowest average sea temperature) is February (48.1°F).
Average daylight in December /
Average sunshine in December
Rockaway Beach, OR
- Average daylight in December: 8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 4h and 18min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 0min).
Average sunshine days in December
Rockaway Beach, OR
- Average sunshine days in December: 13.2 days
The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is March (12.4 days).
Average UV index in December
Rockaway Beach, OR
- 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 February, November and December (UV index 2).
Average cloud cover in December
Rockaway Beach, OR
- Average cloud cover in December: 55
The months with the most cloud cover are January and March (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Rockaway Beach, OR
- 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).
