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
The month of December, characterized by an average high of 46°F (7.8°C) and a low of 31.5°F (-0.3°C), is recognized as the coldest.Humidity
In Grants Pass, the average relative humidity in December is 84%.Rainfall
The month with the most rainfall is December, when the rain falls for 15.9 days and typically aggregates up to 4.02" (102mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Grants Pass, Oregon, in December, during 1.1 snowfall days, 0.51" (13mm) of snow is typically accumulated. In Grants Pass, during the entire year, snow falls for 7.9 days and aggregates up to 5.12" (130mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:23 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:42 am and sunset at 4:50 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 4.7h 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 reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
What is the average December temperature?
What is the average humidity in December in Grants Pass?
What is the wettest 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 Grants Pass have in December?
When are sunrise and sunset in December in Grants Pass?
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
Grants Pass, OR
- Average high temperature in December: 46°F
The warmest month (with the highest average high temperature) is August (84.7°F).
The month with the lowest average high temperature is December (46°F).
- Average low temperature in December: 31.5°F
The month with the highest average low temperature is August (49.1°F).
The coldest month (with the lowest average low temperature) is December (31.5°F).
Average pressure in December
Grants Pass, OR
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in December
Grants Pass, OR
- Average wind speed in December: 3.7mph
The windiest month (with the highest average wind speed) is March (4mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).
Average humidity in December
Grants Pass, OR
- Average humidity in December: 84%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (63%).
Average rainfall in December
Grants Pass, OR
- Average rainfall in December: 4.02"
The wettest month (with the highest rainfall) is December (4.02").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in December
Grants Pass, OR
- Average rainfall days in December: 15.9 days
The month with the highest number of rainy days is March (18.7 days).
The month with the least rainy days is August (2.5 days).
Average snowfall in December
Grants Pass, OR
- Average snowfall in December: 0.51"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Grants Pass, OR
- Average snowfall days in December: 1.1 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 daylight in December /
Average sunshine in December
Grants Pass, OR
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in December
Grants Pass, OR
- Average sunshine days in December: 13.5 days
The month with the most sunshine days is July (26.7 days).
The month with the least sunshine days is March (10.8 days).
Average UV index in December
Grants Pass, 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
Grants Pass, OR
- Average cloud cover in December: 52
The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Grants Pass, OR
- Average visibility in December: 4mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Grants Pass, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location