December weather forecastSouthworth, WA
December
Weather in December
December, the first month of the winter in Southworth, is also a frosty month, with temperature in the range of an average low of 34.9°F (1.6°C) and an average high of 43.2°F (6.2°C).Temperature
In Southworth, the lowest average temperatures are observed in December, with a high of 43.2°F (6.2°C) and a low of 34.9°F (1.6°C).Humidity
The most humid month is December, with an average relative humidity of 87%.Rainfall
The months with the most rainfall are January and December, with an average 2.05" (52mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Southworth. In Southworth, during December, snow falls for 1 days and regularly aggregates up to 0.12" (3mm) of snow. Throughout the year, there are 7 snowfall days, and 2.36" (60mm) of snow is accumulated.Ocean temperature
In December, the average ocean temperature is 46.6°F (8.1°C).Note: Diving into 46.6°F (8.1°C) is practical below 50°F (10°C), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 55.4°F (13°C) feels ice-cold.
Daylight
The month with the shortest days is December, with an average of 8h and 30min of daylight.On the first day of December in Southworth, sunrise is at 7:37 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 4:29 pm PST.
Sunshine
With an average of 4.1h of sunshine, December has the least sunshine of the year.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 reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: A daily high UV index of 2 in December leads to these guidelines:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Southworth, WA
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (43.2°F).
- Average low temperature in December: 34.9°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.9°F).
Average pressure in December
Southworth, WA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in December
Southworth, WA
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is March (5.5mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).
Average humidity in December
Southworth, WA
- Average humidity in December: 87%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
Southworth, WA
- Average rainfall in December: 2.05"
The wettest months (with the highest rainfall) are January and December (2.05").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in December
Southworth, WA
- Average rainfall days in December: 14.3 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (5.4 days).
Average snowfall in December
Southworth, WA
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Southworth, WA
- Average snowfall days in December: 1 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Southworth, WA
- Average sea temperature in December: 46.6°F
The best month for swimming (with the highest average sea temperature) is August (53.2°F).
The coldest month (with the lowest average sea temperature) is February (45.3°F).
Average daylight in December /
Average sunshine in December
Southworth, WA
- Average daylight in December: 8h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 4h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in December
Southworth, WA
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in December
Southworth, 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, November and December (UV index 2).
Average cloud cover in December
Southworth, WA
- Average cloud cover in December: 58
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Southworth, WA
- Average visibility in December: 5mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
