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
Monmouth witnesses the coldest weather in December, with temperatures averaging a high of 44.2°F (6.8°C) and a low of 34.2°F (1.2°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 88%.Rainfall
December is the month with the most rainfall in Monmouth, Oregon. Rain falls for 16.5 days and accumulates 1.54" (39mm) of precipitation.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.6 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 4.5 snowfall days, and 0.91" (23mm) of snow is accumulated.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year in Monmouth.On the first day of December in Monmouth, sunrise is at 7:31 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 4:42 pm PST.
Sunshine
In Monmouth, the average sunshine in December is 4.1h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Monmouth. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 2 during December leads to these advisories:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
What month is the coldest in Monmouth?
How cold is it in Monmouth in December?
What are the most humid months in Monmouth?
What is the average humidity in December in Monmouth?
What is the wettest month in Monmouth?
How much does it rain in Monmouth in December?
When does it start to snow in Monmouth?
What is the month with the shortest days in Monmouth?
What is the average length of the day in December in Monmouth?
What time are sunrise and sunset in December in Monmouth?
How many hours of sunshine does Monmouth have in December?
What are the months with the lowest UV index in Monmouth?
What is the UV index intensity in December in Monmouth?
Average temperature in December
Monmouth, OR
- Average high temperature in December: 44.2°F
The warmest month (with the highest average high temperature) is August (80.8°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in December
Monmouth, OR
- Average pressure in December: 30.09"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
Monmouth, OR
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in December
Monmouth, OR
- Average humidity in December: 88%
The months with the highest relative humidity are February and December (88%).
The month with the lowest relative humidity is August (68%).
Average rainfall in December
Monmouth, OR
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in December
Monmouth, OR
- Average rainfall days in December: 16.5 days
The month with the highest number of rainy days is March (17.8 days).
The month with the least rainy days is August (4 days).
Average snowfall in December
Monmouth, OR
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (0.55").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Monmouth, OR
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is February (1.8 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
Monmouth, 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: 4h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in December
Monmouth, OR
- Average sunshine days in December: 11.5 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (9.7 days).
Average UV index in December
Monmouth, OR
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Monmouth, OR
- Average cloud cover in December: 59
The months with the most cloud cover are February and March (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in December
Monmouth, 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, November and December (4mi).
Monmouth, Oregon, USA
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