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 beginning of January reveals an average high-temperature of a chilly 45°F (7.2°C), showing minimal deviation from the previous month. Nighttime readings in Mill Creek during January register a minimal drop from daytime highs, averaging at an icy 36.7°F (2.6°C).Humidity
In Mill Creek, the average relative humidity in January is 83%.Rainfall
In Mill Creek, in January, during 18 rainfall days, 3.43" (87mm) of precipitation is typically accumulated. In Mill Creek, Washington, during the entire year, the rain falls for 173.1 days and collects up to 26.02" (661mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Mill Creek, Washington, during January, snow falls for 2.7 days and regularly aggregates up to 1.73" (44mm) of snow. In Mill Creek, during the entire year, snow falls for 16.3 days and aggregates up to 10.08" (256mm) of snow.Daylight
In Mill Creek, the average length of the day in January is 8h and 56min.On the first day of January, sunrise is at 7:57 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 5:07 pm PST.
Sunshine
With an average of 4.4h of sunshine, January has the least sunshine of the year.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 reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 2 during January translates into the following recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Enhance your sun protection with tightly woven, yet airy clothing. 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
What are January temperatures?
What is the average humidity in January?
How much does it rain in January?
How many days does it snow in January?
What is the average length of the day in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Mill Creek, WA
- Average high temperature in January: 45°F
The warmest month (with the highest average high temperature) is August (72.7°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in January: 36.7°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (35.4°F).
Average pressure in January
Mill Creek, WA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in January
Mill Creek, WA
- Average wind speed in January: 6mph
The windiest month (with the highest average wind speed) is November (6.2mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in January
Mill Creek, WA
- Average humidity in January: 83%
The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is July (72%).
Average rainfall in January
Mill Creek, WA
- Average rainfall in January: 3.43"
The wettest month (with the highest rainfall) is December (3.54").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in January
Mill Creek, WA
- Average rainfall days in January: 18 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in January
Mill Creek, WA
- Average snowfall in January: 1.73"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Mill Creek, WA
- Average snowfall days in January: 2.7 days
The month with the highest number of snowfall days is February (5.2 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
Mill Creek, WA
- Average daylight in January: 8h and 5min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in January
Mill Creek, WA
- Average sunshine days in January: 10.6 days
The month with the most sunshine days is August (22.6 days).
The month with the least sunshine days is November (9.1 days).
Average UV index in January
Mill Creek, WA
- Average UV index in January: 2
The month with the highest UV index is 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
Mill Creek, WA
- Average cloud cover in January: 53
The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in January
Mill Creek, WA
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Mill Creek, Washington, USA
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