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
As December turns into January, the average high-temperatures rest at a still chilly 47.8°F (8.8°C), showing a minor variation from the prior month. In the month of January, the nighttime temperature in Jefferson dips to a steady average of 35.2°F (1.8°C).Humidity
The average relative humidity in January is 86%.Rainfall
In Jefferson, in January, during 17.7 rainfall days, 3.86" (98mm) of precipitation is typically accumulated. Throughout the year, in Jefferson, there are 164.2 rainfall days, and 26.97" (685mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Jefferson, Oregon, in January, snow falls for 0.8 days, with typically accumulated 0.43" (11mm) of snow. In Jefferson, during the entire year, snow falls for 4.3 days and aggregates up to 2.64" (67mm) of snow.Daylight
In Jefferson, the average length of the day in January is 9h and 16min.On the first day of January, sunrise is at 7:49 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:18 pm PST.
Sunshine
In Jefferson, the average sunshine in January is 4.3h.UV index
The months with the lowest UV index in Jefferson, Oregon, 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 the ordinary person.Note: The maximum daily UV index of 2 during January translates into the following directions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the temperature in January in Jefferson?
What is the average humidity in January in Jefferson?
How much does it rain in Jefferson in January?
How much does it snow in Jefferson in January?
How many hours of daylight does Jefferson have in January?
When are sunrise and sunset in January in Jefferson?
How many hours of sunshine does Jefferson have in January?
What are the months with the lowest UV index in Jefferson?
What is the UV index reading in January in Jefferson?
Average temperature in January
Jefferson, OR
- Average high temperature in January: 47.8°F
The warmest month (with the highest average high temperature) is August (81.9°F).
The month with the lowest average high temperature is December (45.5°F).
- Average low temperature in January: 35.2°F
The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).
Average pressure in January
Jefferson, OR
- Average pressure in January: 30.11"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 January
Jefferson, OR
- Average wind speed in January: 5mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in January
Jefferson, OR
- Average humidity in January: 86%
The months with the highest relative humidity are February and December (87%).
The month with the lowest relative humidity is August (66%).
Average rainfall in January
Jefferson, OR
- Average rainfall in January: 3.86"
The wettest month (with the highest rainfall) is December (3.98").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in January
Jefferson, OR
- Average rainfall days in January: 17.7 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is August (3.9 days).
Average snowfall in January
Jefferson, OR
- Average snowfall in January: 0.43"
The month with the highest snowfall is February (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Jefferson, OR
- Average snowfall days in January: 0.8 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Jefferson, 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: 4h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in January
Jefferson, OR
- Average sunshine days in January: 11.8 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (9 days).
Average UV index in January
Jefferson, 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, November and December (UV index 2).
Average cloud cover in January
Jefferson, OR
- Average cloud cover in January: 57
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in January
Jefferson, OR
- Average visibility in January: 5mi
The months with the highest visibility are July, August and September (6mi).
The month with the lowest visibility is February (4mi).
Jefferson, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location
