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 arrival of January coincides with an average high-temperature of a frosty 43.7°F (6.5°C), indicating a minimal shift from December's 41.5°F (5.3°C). An average low-temperature of 33.6°F (0.9°C) is recorded during the nights in January.Humidity
In January, the average relative humidity is 89%.Rainfall
The month with the most rainfall in Union is January, when the rain falls for 18.8 days and typically aggregates up to 7.24" (184mm) of precipitation.Snowfall
Months with snowfall in Union are January through March, November and December. In Union, Washington, in January, snow falls for 1.9 days, with typically accumulated 1.81" (46mm) of snow. Throughout the year, in Union, there are 9.1 snowfall days, and 5.59" (142mm) of snow is accumulated.Daylight
The average length of the day in January in Union is 8h and 59min.On the first day of January, sunrise is at 7:59 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 5:12 pm PST.
Sunshine
The average sunshine in January in Union is 3.7h.UV index
The months with the lowest UV index in Union are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 2 in January interprets into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. To protect against the Sun's most potent rays, avoid direct exposure around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Union in January?
What is the average humidity in January in Union?
What is the wettest month in Union?
How much does it rain in Union in January?
How much does it snow in Union in January?
How many hours of daylight does Union have in January?
When are sunrise and sunset in January in Union?
How long on average sun shines in January in Union?
What is the month with the lowest UV index in Union?
What is the UV index intensity in January in Union?
Average temperature in January
Union, WA
- Average high temperature in January: 43.7°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (41.5°F).
- Average low temperature in January: 33.6°F
The month with the highest average low temperature is August (50.4°F).
The coldest month (with the lowest average low temperature) is February (32.7°F).
Average pressure in January
Union, WA
- Average pressure in January: 30.08"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in January
Union, WA
- Average wind speed in January: 4.1mph
The windiest month (with the highest average wind speed) is March (4.3mph).
The calmest month (with the lowest average wind speed) is September (3.4mph).
Average humidity in January
Union, WA
- Average humidity in January: 89%
The months with the highest relative humidity are November and December (90%).
The month with the lowest relative humidity is July (72%).
Average rainfall in January
Union, WA
- Average rainfall in January: 7.24"
The wettest month (with the highest rainfall) is January (7.24").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in January
Union, WA
- Average rainfall days in January: 18.8 days
The month with the highest number of rainy days is March (21.4 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in January
Union, WA
- Average snowfall in January: 1.81"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Union, WA
- Average snowfall days in January: 1.9 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Union, WA
- Average daylight in January: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January: 3h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in January
Union, WA
- Average sunshine days in January: 9.9 days
The month with the most sunshine days is July (21.7 days).
The month with the least sunshine days is March (7.5 days).
Average UV index in January
Union, WA
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Union, WA
- Average cloud cover in January: 64
The months with the most cloud cover are January and December (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in January
Union, WA
- Average visibility in January: 4mi
The months with the highest visibility are June, July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (4mi).
Union, Washington, USA
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