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
The average high-temperature for January is a still frosty 47.8°F (8.8°C), closely aligning with the temperature of the preceding month. In January, the recorded average low-temperature in Tri-City is a cold 33.4°F (0.8°C).Humidity
The months with the highest humidity are January, February and December, with an average relative humidity of 86%.Rainfall
The months with the most rainfall are January, February and December, with an average 1.1" (28mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Tri-City, during January, snow falls for 0.5 days and regularly aggregates up to 0.47" (12mm) of snow. Throughout the year, there are 3.5 snowfall days, and 2.2" (56mm) of snow is accumulated.Daylight
The average length of the day in January 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 January, the average sunshine 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. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 2 in January suggests the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Tri-City in January?
What is the most humid month?
What is the average humidity in January?
What is the wettest month?
How many days does it rain in January?
How much does it snow in January?
How many hours of daylight does Tri-City have in January?
What time are sunrise and sunset in January?
How long on average sun shines in January?
What is the month with the lowest UV index in Tri-City?
What is the UV index reading in January?
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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