Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January's climate shows a minor adjustment in average high-temperatures to a still icy 35.2°F (1.8°C) from December's 33.4°F (0.8°C). Mount Vernon records an average low-temperature of 22.1°F (-5.5°C) throughout the month of January.Humidity
The average relative humidity in January in Mount Vernon, Oregon, is 84%.Rainfall
In January, in Mount Vernon, the rain falls for 12.3 days. Throughout January, 2.17" (55mm) of precipitation is accumulated. In Mount Vernon, during the entire year, the rain falls for 127.7 days and collects up to 17.09" (434mm) of precipitation.Snowfall
Months with snowfall in Mount Vernon are January through May, September through December. In January, in Mount Vernon, it is snowing for 11.7 days. Throughout January, 8.11" (206mm) of snow is accumulated. In Mount Vernon, during the entire year, snow falls for 62.5 days and aggregates up to 39.17" (995mm) of snow.Daylight
The average length of the day in January in Mount Vernon, Oregon, is 9h and 18min.On the first day of January in Mount Vernon, sunrise is at 7:32 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:03 pm PST.
Sunshine
January and February, with an average of 5.2h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index in Mount Vernon, Oregon, are January through March, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
How cold is January in Mount Vernon?
What is the average humidity in January in Mount Vernon?
How much does it rain in Mount Vernon in January?
How many days does it snow in January in Mount Vernon?
How many hours of daylight does Mount Vernon have in January?
When are sunrise and sunset in January in Mount Vernon?
What are the months with the least sunshine in Mount Vernon?
How long on average sun shines in January in Mount Vernon?
When is the lowest UV index in Mount Vernon?
What is the UV index intensity in January in Mount Vernon?
Average temperature in January
Mount Vernon, OR
- Average high temperature in January: 35.2°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 January: 22.1°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 January
Mount Vernon, OR
- Average pressure in January: 30.22"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 January
Mount Vernon, OR
- Average wind speed in January: 6mph
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 January
Mount Vernon, OR
- Average humidity in January: 84%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (42%).
Average rainfall in January
Mount Vernon, OR
- Average rainfall in January: 2.17"
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 January
Mount Vernon, OR
- Average rainfall days in January: 12.3 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 January
Mount Vernon, OR
- Average snowfall in January: 8.11"
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 January
Mount Vernon, OR
- Average snowfall days in January: 11.7 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 January /
Average sunshine in January
Mount Vernon, OR
- Average daylight in January: 9h and 2min
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 January: 5h and 1min
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 January
Mount Vernon, OR
- Average sunshine days in January: 13.5 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 January
Mount Vernon, OR
- Average UV index in January: 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 January
Mount Vernon, OR
- Average cloud cover in January: 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 January
Mount Vernon, OR
- Average visibility in January: 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).
Mount Vernon, Oregon, USA
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