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
Upon the beginning of January, Umatilla's high-temperatures register at a still icy 39.9°F (4.4°C), closely mirroring the preceding month. Throughout the month of January, Umatilla witnesses an average low-temperature of 29.7°F (-1.3°C).Humidity
With an average relative humidity of 79%, January is the most humid month.Rainfall
In Umatilla, in January, during 11.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Umatilla, during the entire year, the rain falls for 106.1 days and collects up to 7.76" (197mm) of precipitation.Snowfall
January through March, September, November and December are months with snowfall in Umatilla. In Umatilla, in January, during 2.3 snowfall days, 1.06" (27mm) of snow is typically accumulated. In Umatilla, during the entire year, snow falls for 10.3 days and aggregates up to 6.02" (153mm) of snow.Daylight
The average length of the day in January is 9h and 9min.On the first day of the month, sunrise is at 7:38 am and sunset at 4:22 pm. On the last day of January, sunrise is at 7:20 am and sunset at 5:00 pm PST.
Sunshine
The months with the least sunshine are January and December, with an average of 5.4h of sunshine.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 of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 2 during January translates into the following guidance:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is January cold?
What is the most humid month?
What is the average humidity in January?
How much does it rain in January?
How many days does it snow in January?
How many hours of daylight does Umatilla have in January?
When is the sunrise / sunset in January?
What are the months 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
Umatilla, OR
- Average high temperature in January: 39.9°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is December (38.7°F).
- Average low temperature in January: 29.7°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in January
Umatilla, OR
- Average pressure in January: 30.19"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in January
Umatilla, OR
- Average wind speed in January: 6.6mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is December (6.2mph).
Average humidity in January
Umatilla, OR
- Average humidity in January: 79%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in January
Umatilla, OR
- Average rainfall in January: 0.98"
The wettest month (with the highest rainfall) is March (1.02").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in January
Umatilla, OR
- Average rainfall days in January: 11.3 days
The month with the highest number of rainy days is March (13.1 days).
The month with the least rainy days is July (3.8 days).
Average snowfall in January
Umatilla, OR
- Average snowfall in January: 1.06"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in January
Umatilla, OR
- Average snowfall days in January: 2.3 days
The month with the highest number of snowfall days is December (3.2 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in January /
Average sunshine in January
Umatilla, OR
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 5h and 2min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in January
Umatilla, OR
- Average sunshine days in January: 15.7 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is February (14 days).
Average UV index in January
Umatilla, OR
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Umatilla, OR
- Average cloud cover in January: 44
The months with the most cloud cover are January and December (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in January
Umatilla, OR
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Umatilla, Oregon, USA
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