January weather forecastUmtanum, WA
January
Weather in January
January, the same as December, is an icy winter month in Umtanum, Washington, with an average temperature varying between 22.6°F (-5.2°C) and 34.3°F (1.3°C).Temperature
The advent of January brings an average high-temperature of a still cold 34.3°F (1.3°C), exhibiting minor difference from the previous month. Umtanum records a steady low-temperature average of 22.6°F (-5.2°C) during January.Humidity
With an average relative humidity of 87%, January is the most humid month in Umtanum.Rainfall
In January, the rain falls for 10.3 days. Throughout January, 1.22" (31mm) of precipitation is accumulated. In Umtanum, Washington, during the entire year, the rain falls for 99.9 days and collects up to 8.66" (220mm) of precipitation.Snowfall
Months with snowfall in Umtanum are January through April, September through December. In Umtanum, during January, snow falls for 8.7 days and regularly aggregates up to 3.98" (101mm) of snow. Throughout the year, there are 35.4 snowfall days, and 15.59" (396mm) of snow is accumulated.Daylight
In January, the average length of the day in Umtanum is 9h and 2min.On the first day of the month, sunrise is at 7:47 am and sunset at 4:23 pm. On the last day of January, sunrise is at 7:27 am and sunset at 5:02 pm PST.
Sunshine
January and December, with an average of 4.8h of sunshine, are months with the least sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Umtanum, Washington. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: In January, the maximum UV index of 2 suggests this advice:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Umtanum, WA
- Average high temperature in January: 34.3°F
The warmest months (with the highest average high temperature) are July and August (82°F).
The month with the lowest average high temperature is December (33.3°F).
- Average low temperature in January: 22.6°F
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure in January
Umtanum, WA
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in January
Umtanum, WA
- Average wind speed in January: 4.5mph
The windiest month (with the highest average wind speed) is June (8.9mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in January
Umtanum, WA
- Average humidity in January: 87%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are July and August (46%).
Average rainfall in January
Umtanum, WA
- Average rainfall in January: 1.22"
The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in January
Umtanum, WA
- Average rainfall days in January: 10.3 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (2.8 days).
Average snowfall in January
Umtanum, WA
- Average snowfall in January: 3.98"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in January
Umtanum, WA
- Average snowfall days in January: 8.7 days
The months with the highest number of snowfall days are January and December (8.7 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Umtanum, WA
- Average daylight in January: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in January: 4h and 48min
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: 4h and 48min).
Average sunshine days in January
Umtanum, WA
- Average sunshine days in January: 15.2 days
The month with the most sunshine days is July (27.1 days).
The month with the least sunshine days is February (13.5 days).
Average UV index in January
Umtanum, WA
- 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, November and December (UV index 2).
Average cloud cover in January
Umtanum, WA
- Average cloud cover in January: 48
The month with the most cloud cover is January (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in January
Umtanum, WA
- Average visibility in January: 4mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
