Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Riddle, Oregon, reaches its lowest average temperatures in December, measuring 45.7°F (7.6°C) at the peak and 32.2°F (0.1°C) at the lowest.Humidity
The months with the highest humidity in Riddle are January, February and December, with an average relative humidity of 86%.Rainfall
The months with the most rainfall are January, February and December, with an average 1.1" (28mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Riddle, during December, snow falls for 0.5 days and regularly aggregates up to 0.31" (8mm) of snow. Throughout the year, there are 3.5 snowfall days, and 2.2" (56mm) of snow is accumulated.Daylight
The month with the shortest days in Riddle is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:25 am and sunset at 4:39 pm. On the last day of December, sunrise is at 7:44 am and sunset at 4:49 pm PST.
Sunshine
The month with the least sunshine in Riddle is December, with an average of 4.3h of sunshine.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 value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 translates into these guidelines:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. It's recommended to limit sun exposure when its radiation is at its peak during midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
What are December temperatures?
What is the most humid month?
What is the average humidity in December?
What is the rainiest month?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Riddle have in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Riddle, OR
- Average high temperature in December: 45.7°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (45.7°F).
- Average low temperature in December: 32.2°F
The month with the highest average low temperature is August (47.7°F).
The coldest month (with the lowest average low temperature) is December (32.2°F).
Average pressure in December
Riddle, OR
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Riddle, OR
- Average wind speed in December: 3.9mph
The windiest month (with the highest average wind speed) is January (4.1mph).
The calmest month (with the lowest average wind speed) is September (3.2mph).
Average humidity in December
Riddle, OR
- Average humidity in December: 86%
The months with the highest relative humidity are January, February and December (86%).
The month with the lowest relative humidity is August (69%).
Average rainfall in December
Riddle, OR
- Average rainfall in December: 1.1"
The wettest months (with the highest rainfall) are January, February and December (1.1").
The driest months (with the least rainfall) are July and August (0.16").
Average rainfall days in December
Riddle, OR
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (2.4 days).
Average snowfall in December
Riddle, OR
- Average snowfall in December: 0.31"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Riddle, OR
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (1.5 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
Riddle, OR
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in December
Riddle, OR
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is August (26.5 days).
The month with the least sunshine days is March (16.1 days).
Average UV index in December
Riddle, 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
Riddle, OR
- Average cloud cover in December: 56
The month with the most cloud cover is March (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Riddle, OR
- Average visibility in December: 4mi
The months with the highest visibility are July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (4mi).
Riddle, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location