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
In Petersburg, the lowest average temperatures are observed in December, with a high of 37°F (2.8°C) and a low of 27.1°F (-2.7°C).Humidity
January and December, with an average relative humidity of 85%, are the most humid months in Petersburg.Rainfall
In Petersburg, in December, during 15.5 rainfall days, 2.87" (73mm) of precipitation is typically accumulated. Throughout the year, there are 133.5 rainfall days, and 16.93" (430mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In December, it is snowing for 4.4 days. Throughout December, 2.99" (76mm) of snow is accumulated. Throughout the year, there are 14.3 snowfall days, and 11.06" (281mm) of snow is accumulated.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year in Petersburg.On the first day of December in Petersburg, sunrise is at 7:25 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 4:30 pm PST.
Sunshine
The average sunshine in December is 5h.UV index
The months with the lowest UV index in Petersburg are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Always opt for UVA and UVB-resistant sunglasses on radiant days. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the coldest month in Petersburg?
How cold is December in Petersburg?
What is the most humid month in Petersburg?
What is the average humidity in December in Petersburg?
How much does it rain in Petersburg in December?
How much does it snow in Petersburg in December?
What is the month with the shortest days in Petersburg?
What is the average length of the day in December in Petersburg?
What time are sunrise and sunset in December in Petersburg?
How many hours of sunshine does Petersburg have in December?
When is the lowest UV index in Petersburg?
What is the UV index intensity in December in Petersburg?
Average temperature in December
Petersburg, 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
Petersburg, 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
Petersburg, 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
Petersburg, 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
Petersburg, 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
Petersburg, 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
Petersburg, 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
Petersburg, 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
Petersburg, OR
- Average daylight in December: 8h and 5min
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
Petersburg, 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
Petersburg, 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
Petersburg, 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
Petersburg, 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).
Petersburg, Oregon, USA
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