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
Mount Vernon signifies an average high-temperature of a still icy 35.2°F (1.8°C) in January, closely mirroring the 33.4°F (0.8°C) of December. Mount Vernon experiences a consistent average temperature of 22.1°F (-5.5°C) throughout the nights in January.Humidity
In January, the average relative humidity is 84%.Rainfall
In Mount Vernon, in January, during 12.3 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, there are 127.7 rainfall days, and 17.09" (434mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. In Mount Vernon, in January, during 11.7 snowfall days, 8.11" (206mm) of snow is typically accumulated. Throughout the year, there are 62.5 snowfall days, and 39.17" (995mm) of snow is accumulated.Daylight
In Mount Vernon, the average length of the day in January is 9h and 18min.On the first day of the month, sunrise is at 7:32 am and sunset at 4:27 pm. On the last day of January, sunrise is at 7:15 am and sunset at 5:03 pm PST.
Sunshine
The months with the least sunshine are January and February, with an average of 5.2h of sunshine.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum high UV index of 2 in January translates into the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Mount Vernon in January?
What is the average humidity in January?
How many days does it rain in January in Mount Vernon?
How much does it snow in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
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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