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
Rivergrove's coldest temperatures are experienced in December, with average high temperatures of 44.1°F (6.7°C) and lows of 34.5°F (1.4°C).Humidity
January, February and December, with an average relative humidity of 84%, are the most humid months in Rivergrove.Rainfall
December is the month with the most rainfall in Rivergrove. Rain falls for 18.9 days and accumulates 4.57" (116mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Rivergrove, during December, snow falls for 0.9 days and regularly aggregates up to 0.43" (11mm) of snow. Throughout the year, in Rivergrove, there are 6.5 snowfall days, and 3.94" (100mm) of snow is accumulated.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:31 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:50 am and sunset at 4:38 pm PST.
Sunshine
In December, the average sunshine is 4.2h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 suggests this advice:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
What is the coldest time of year in Rivergrove?
How cold is it in Rivergrove in December?
What is the most humid month in Rivergrove?
What is the average humidity in December in Rivergrove?
What is the rainiest month in Rivergrove?
How much does it rain in Rivergrove in December?
How many days does it snow in December in Rivergrove?
What is the month with the shortest days in Rivergrove?
How many hours of daylight does Rivergrove have in December?
What time are sunrise and sunset in December in Rivergrove?
How long on average sun shines in December in Rivergrove?
When is the lowest UV index in Rivergrove?
What is the UV index reading in December in Rivergrove?
Average temperature in December
Rivergrove, OR
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (44.1°F).
- Average low temperature in December: 34.5°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).
Average pressure in December
Rivergrove, OR
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in December
Rivergrove, OR
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in December
Rivergrove, OR
- Average humidity in December: 84%
The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is August (63%).
Average rainfall in December
Rivergrove, OR
- Average rainfall in December: 4.57"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Rivergrove, OR
- Average rainfall days in December: 18.9 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (4.8 days).
Average snowfall in December
Rivergrove, OR
- Average snowfall in December: 0.43"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Rivergrove, OR
- Average snowfall days in December: 0.9 days
The month with the highest number of snowfall days is February (2.3 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
Rivergrove, 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: 4h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in December
Rivergrove, OR
- Average sunshine days in December: 10.4 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in December
Rivergrove, 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
Rivergrove, OR
- Average cloud cover in December: 56
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in December
Rivergrove, OR
- Average visibility in December: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
Rivergrove, Oregon, USA
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