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 coldest month is December, with an average high-temperature of 33.4°F (0.8°C) and an average low-temperature of 19.6°F (-6.9°C).Humidity
In December, the average relative humidity in John Day is 84%.Rainfall
In John Day, during December, the rain falls for 11.1 days and regularly aggregates up to 2.24" (57mm) of precipitation. In John Day, during the entire year, the rain falls for 127.7 days and collects up to 17.09" (434mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in John Day. In December, it is snowing for 14.5 days. Throughout December, 8.31" (211mm) of snow is accumulated. Throughout the year, in John Day, Oregon, there are 62.5 snowfall days, and 39.17" (995mm) of snow is accumulated.Daylight
The month with the shortest days in John Day is December, with an average of 8h and 55min of daylight.On the first day of December in John Day, sunrise is at 7:11 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:25 pm PST.
Sunshine
In John Day, the average sunshine in December is 5.3h.UV index
January through March, October through 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 low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The average daily UV index of 2 in December transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
FAQ
What is the coldest month in John Day?
What is the temperature in December in John Day?
What is the average humidity in December in John Day?
How many days does it rain in December in John Day?
How much does it snow in John Day in December?
What is the month with the shortest days in John Day?
How many hours of daylight does John Day have in December?
When is the sunrise / sunset in December in John Day?
How many hours of sunshine does John Day have in December?
When is the lowest UV index in John Day?
What is the UV index intensity in December in John Day?
Average temperature in December
John Day, OR
- Average high temperature in December: 33.4°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 (33.4°F).
- Average low temperature in December: 19.6°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (19.6°F).
Average pressure in December
John Day, OR
- Average pressure in December: 30.19"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in December
John Day, OR
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).
Average humidity in December
John Day, OR
- Average humidity in December: 84%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (42%).
Average rainfall in December
John Day, OR
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is February (2.28").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in December
John Day, OR
- Average rainfall days in December: 11.1 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in December
John Day, OR
- Average snowfall in December: 8.31"
The month with the highest snowfall is February (10.31").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
John Day, OR
- Average snowfall days in December: 14.5 days
The month with the highest number of snowfall days is December (14.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
John Day, OR
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in December
John Day, OR
- Average sunshine days in December: 11.4 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is February (9 days).
Average UV index in December
John Day, 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, March, October, November and December (UV index 2).
Average cloud cover in December
John Day, OR
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in December
John Day, OR
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
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