December weather forecastThe Dalles, OR
December
Weather in December
In December, the Dalles transitions into the heart of winter. The highest snowfall post-Febrauary occurs in December, accumulating to approximately 2.99" (76mm) across 4.4 days. The increasing chill in the air indicates the approach of the Christmas season, transforming the city into a festive fairyland. Although the weather might be cold, the innate warmth of the city and its inhabitants, coupled with the festive cheer, leaves an indelible mark on visitors and residents alike.Temperature
The Dalles's temperature records reveal December as the coldest month, marked by average highs of 37°F (2.8°C) and lows of 27.1°F (-2.7°C).Humidity
The months with the highest humidity are January and December, with an average relative humidity of 85%.Rainfall
In December, the rain falls for 15.5 days. Throughout December, 2.87" (73mm) of precipitation is accumulated. In The Dalles, during the entire year, the rain falls for 133.5 days and collects up to 16.93" (430mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In The Dalles, during December, snow falls for 4.4 days and regularly aggregates up to 2.99" (76mm) of snow. In The Dalles, during the entire year, snow falls for 14.3 days and aggregates up to 11.06" (281mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 48min of daylight.On the first day of December in The Dalles, sunrise is at 7:25 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:31 pm PST.
Sunshine
In The Dalles, the average sunshine in December is 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 unsafe exposure to UV radiation for the average person.Note: An average UV index of 2 in December transforms into this advice:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
The Dalles, OR
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (37°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is August (55.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).
Average pressure in December
The Dalles, OR
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).
Average wind speed in December
The Dalles, OR
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).
Average humidity in December
The Dalles, OR
- Average humidity in December: 85%
The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are July and August (51%).
Average rainfall in December
The Dalles, OR
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is January (2.99").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
The Dalles, OR
- Average rainfall days in December: 15.5 days
The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (3.2 days).
Average snowfall in December
The Dalles, OR
- Average snowfall in December: 2.99"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
The Dalles, OR
- Average snowfall days in December: 4.4 days
The month with the highest number of snowfall days is December (4.4 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
The Dalles, 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: 5h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
The Dalles, OR
- Average sunshine days in December: 12.1 days
The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is March (10.6 days).
Average UV index in December
The Dalles, OR
- 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
The Dalles, OR
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in December
The Dalles, OR
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
