December weather forecastEphrata, WA
December
Weather in December
December, the first month of the winter in Ephrata, is also a wintry month, with an average temperature varying between 33.4°F (0.8°C) and 23.2°F (-4.9°C).Temperature
December, with average temperatures reaching a high of 33.4°F (0.8°C) and a low of 23.2°F (-4.9°C), is the coldest month.Humidity
In December, the average relative humidity in Ephrata is 83%.Rainfall
In Ephrata, in December, it is raining for 8 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 95.2 rainfall days, and 7.91" (201mm) of precipitation is accumulated.Snowfall
January through April, September, November and December are months with snowfall. December is the month with the most snowfall in Ephrata. Snow falls for 7.8 days and accumulates 3.98" (101mm) of snow.Daylight
December has the shortest days of the year in Ephrata, Washington, with an average of 8h and 30min of daylight.On the first day of December, sunrise is at 7:25 am and sunset at 4:09 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:18 pm PST.
Sunshine
The average sunshine in December is 4.8h.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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. When the Sun is at its strongest around midday, find shade and limit exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. On your guard! Snow's reflection 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
Ephrata, WA
- Average high temperature in December: 33.4°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (33.4°F).
- Average low temperature in December: 23.2°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.2°F).
Average pressure in December
Ephrata, WA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in December
Ephrata, WA
- Average wind speed in December: 5.3mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are January and December (5.3mph).
Average humidity in December
Ephrata, WA
- Average humidity in December: 83%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are July and August (37%).
Average rainfall in December
Ephrata, WA
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is January (1.02").
The driest month (with the least rainfall) is August (0.24").
Average rainfall days in December
Ephrata, WA
- Average rainfall days in December: 8 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (4.2 days).
Average snowfall in December
Ephrata, WA
- Average snowfall in December: 3.98"
The month with the highest snowfall is December (3.98").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in December
Ephrata, WA
- Average snowfall days in December: 7.8 days
The month with the highest number of snowfall days is December (7.8 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Ephrata, 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 48min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
Ephrata, WA
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is July (25.8 days).
The month with the least sunshine days is March (15.6 days).
Average UV index in December
Ephrata, 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
Ephrata, WA
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in December
Ephrata, WA
- Average visibility in December: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
