December weather forecastCascade Locks, OR
December
Weather in December
December, the first month of the winter in Cascade Locks, is still a cold month, with an average temperature varying between 37.2°F (2.9°C) and 27.7°F (-2.4°C).Temperature
Cascade Locks notes the coldest temperatures in December, with a high average of 37.2°F (2.9°C) and a low of 27.7°F (-2.4°C).Humidity
In December, the average relative humidity is 87%.Rainfall
In December, the rain falls for 19.9 days. Throughout December, 6.93" (176mm) of precipitation is accumulated. Throughout the year, there are 181 rainfall days, and 43.15" (1096mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Cascade Locks, during December, snow falls for 2.7 days and regularly aggregates up to 2.32" (59mm) of snow. In Cascade Locks, during the entire year, snow falls for 13.5 days and aggregates up to 12.95" (329mm) 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, sunrise is at 7:28 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 4:33 pm PST.
Sunshine
The average sunshine in December is 3.5h.UV index
In Cascade Locks, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 2 during December translates into the following guidance:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Minimize direct exposure to the Sun during midday when its radiation is at its peak. To cut down UV radiation exposure by about half, sport a wide-brim hat. 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
Cascade Locks, OR
- Average high temperature in December: 37.2°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (37.2°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is August (49.5°F).
The coldest month (with the lowest average low temperature) is December (27.7°F).
Average pressure in December
Cascade Locks, OR
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in December
Cascade Locks, OR
- Average wind speed in December: 6.1mph
The windiest month (with the highest average wind speed) is January (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
Cascade Locks, OR
- Average humidity in December: 87%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are July and August (66%).
Average rainfall in December
Cascade Locks, OR
- Average rainfall in December: 6.93"
The wettest month (with the highest rainfall) is January (7.48").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Cascade Locks, OR
- Average rainfall days in December: 19.9 days
The month with the highest number of rainy days is March (21.7 days).
The month with the least rainy days is August (5 days).
Average snowfall in December
Cascade Locks, OR
- Average snowfall in December: 2.32"
The month with the highest snowfall is January (4.33").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Cascade Locks, OR
- Average snowfall days in December: 2.7 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Cascade Locks, 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: 3h and 30min
The months with the most sunshine are July and August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in December
Cascade Locks, OR
- Average sunshine days in December: 8.9 days
The month with the most sunshine days is August (24 days).
The month with the least sunshine days is February (7.1 days).
Average UV index in December
Cascade Locks, OR
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Cascade Locks, OR
- Average cloud cover in December: 65
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in December
Cascade Locks, OR
- Average visibility in December: 4mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February, March, November and December (4mi).
