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 registers an average high-temperature of a still chilly 47.8°F (8.8°C), slightly varied from December's 45.7°F (7.6°C). Throughout January, the average low-temperature in Tri-City dips to a wintry 33.4°F (0.8°C).Humidity
The months with the highest humidity in Tri-City are January, February and December, with an average relative humidity of 86%.Rainfall
The wettest months are January, February and December, with an average 1.1" (28mm) of rainfall.Snowfall
Months with snowfall in Tri-City, Oregon, are January through March, November and December. In Tri-City, in January, snow falls for 0.5 days, with typically accumulated 0.47" (12mm) of snow. Throughout the year, there are 3.5 snowfall days, and 2.2" (56mm) of snow is accumulated.Daylight
In January, the average length of the day in Tri-City, Oregon, is 9h and 27min.On the first day of the month, sunrise is at 7:44 am and sunset at 4:49 pm. On the last day of January, in Tri-City, sunrise is at 7:29 am and sunset at 5:24 pm PST.
Sunshine
In Tri-City, the average sunshine in January is 4.6h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Tri-City. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: In January, the maximum UV index of 2 translates into these guidelines:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. It's recommended to limit sun exposure when its radiation is at its peak during midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What are the temperatures in Tri-City in January?
What are the most humid months in Tri-City?
What is the average humidity in January in Tri-City?
What is the wettest month in Tri-City?
How many days does it rain in January in Tri-City?
How much does it snow in Tri-City in January?
What is the average length of the day in January in Tri-City?
What time are sunrise and sunset in January in Tri-City?
How many hours of sunshine does Tri-City have in January?
When is the lowest UV index in Tri-City?
What is the UV index reading in January in Tri-City?
Average temperature in January
Tri-City, OR
- Average high temperature in January: 47.8°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (45.7°F).
- Average low temperature in January: 33.4°F
The month with the highest average low temperature is August (47.7°F).
The coldest month (with the lowest average low temperature) is December (32.2°F).
Average pressure in January
Tri-City, OR
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in January
Tri-City, OR
- Average wind speed in January: 4.1mph
The windiest month (with the highest average wind speed) is January (4.1mph).
The calmest month (with the lowest average wind speed) is September (3.2mph).
Average humidity in January
Tri-City, OR
- Average humidity in January: 86%
The months with the highest relative humidity are January, February and December (86%).
The month with the lowest relative humidity is August (69%).
Average rainfall in January
Tri-City, OR
- Average rainfall in January: 1.1"
The wettest months (with the highest rainfall) are January, February and December (1.1").
The driest months (with the least rainfall) are July and August (0.16").
Average rainfall days in January
Tri-City, OR
- Average rainfall days in January: 10.8 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (2.4 days).
Average snowfall in January
Tri-City, OR
- Average snowfall in January: 0.47"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Tri-City, OR
- Average snowfall days in January: 0.5 days
The month with the highest number of snowfall days is February (1.5 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
Tri-City, OR
- Average daylight in January: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January: 4h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in January
Tri-City, OR
- Average sunshine days in January: 18.7 days
The month with the most sunshine days is August (26.5 days).
The month with the least sunshine days is March (16.1 days).
Average UV index in January
Tri-City, 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
Tri-City, OR
- Average cloud cover in January: 53
The month with the most cloud cover is March (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in January
Tri-City, OR
- Average visibility in January: 4mi
The months with the highest visibility are July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (4mi).
Tri-City, Oregon, USA
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