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
With average high and low temperatures of 37.2°F (2.9°C) and 25°F (-3.9°C) respectively, December is Merrill's coldest month.Humidity
The average relative humidity in December is 82%.Rainfall
December is the month with the most rainfall in Merrill. Rain falls for 10 days and accumulates 1.97" (50mm) of precipitation.Snowfall
Months with snowfall in Merrill are January through June, September through December. The month with the most snowfall in Merrill is December, when snow falls for 13.4 days and typically aggregates up to 9.57" (243mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:15 am and sunset at 4:35 pm. On the last day of December, sunrise is at 7:34 am and sunset at 4:45 pm PST.
Sunshine
In December, the average sunshine is 5.5h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum daily UV index of 2 during December morphs into the following directions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Frequently asked questions
What are the coldest months in Merrill?
How cold is December in Merrill?
What is the average humidity in December in Merrill?
What is the rainiest month in Merrill?
How much does it rain in Merrill in December?
When does it snow the most in Merrill?
How many days does it snow in December in Merrill?
What is the month with the shortest days in Merrill?
What is the average length of the day in December in Merrill?
When are sunrise and sunset in December in Merrill?
How long on average sun shines in December in Merrill?
When is the lowest UV index in Merrill?
What is the UV index intensity in December in Merrill?
Average temperature in December
Merrill, OR
- Average high temperature in December: 37.2°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (37.2°F).
- Average low temperature in December: 25°F
The month with the highest average low temperature is August (49.3°F).
The coldest month (with the lowest average low temperature) is December (25°F).
Average pressure in December
Merrill, OR
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The months with the lowest atmospheric pressure are June, July and August (29.96"Hg).
Average wind speed in December
Merrill, OR
- Average wind speed in December: 5.3mph
The windiest month (with the highest average wind speed) is March (6.5mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Merrill, OR
- Average humidity in December: 82%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (47%).
Average rainfall in December
Merrill, OR
- Average rainfall in December: 1.97"
The wettest month (with the highest rainfall) is December (1.97").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Merrill, OR
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is August (3.1 days).
Average snowfall in December
Merrill, OR
- Average snowfall in December: 9.57"
The month with the highest snowfall is December (9.57").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Merrill, OR
- Average snowfall days in December: 13.4 days
The month with the highest number of snowfall days is December (13.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Merrill, 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 12min).
- Average sunshine in December: 5h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
Merrill, OR
- Average sunshine days in December: 14.7 days
The month with the most sunshine days is August (25.7 days).
The month with the least sunshine days is March (11.5 days).
Average UV index in December
Merrill, 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, November and December (UV index 2).
Average cloud cover in December
Merrill, OR
- Average cloud cover in December: 44
The months with the most cloud cover are March and December (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in December
Merrill, OR
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Merrill, Oregon, USA
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