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 weather during January records an average high-temperature of a still cold 37°F (2.8°C), closely mirroring the preceding month. In January, Mill A reports a consistent average low-temperature of 27.7°F (-2.4°C) during the nights.Humidity
In January, the average relative humidity is 87%.Rainfall
The month with the most rainfall is January, when the rain falls for 17.7 days and typically aggregates up to 5.67" (144mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In January, it is snowing for 3.4 days. Throughout January, 3.82" (97mm) of snow is accumulated. In Mill A, during the entire year, snow falls for 15.1 days and aggregates up to 14.33" (364mm) of snow.Daylight
In Mill A, the average length of the day in January is 9h and 10min.On the first day of January, sunrise is at 7:47 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:10 pm PST.
Sunshine
January has the least sunshine of the year, with an average of 3.7h of sunshine.UV index
January, February and November, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 1 during January translates into these guidelines:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. When the Sun is at its strongest around midday, find shade and limit exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the average humidity in January?
What is the rainiest month?
How many days 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 in Mill A?
What are the months with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Mill A, WA
- Average high temperature in January: 37°F
The warmest month (with the highest average high temperature) is August (78.4°F).
The month with the lowest average high temperature is December (36°F).
- Average low temperature in January: 27.7°F
The month with the highest average low temperature is August (51.4°F).
The coldest month (with the lowest average low temperature) is December (27°F).
Average pressure in January
Mill A, 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 (29.97"Hg).
Average wind speed in January
Mill A, WA
- Average wind speed in January: 5.3mph
The windiest month (with the highest average wind speed) is June (6.1mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).
Average humidity in January
Mill A, WA
- Average humidity in January: 87%
The months with the highest relative humidity are February and December (88%).
The month with the lowest relative humidity is July (59%).
Average rainfall in January
Mill A, WA
- Average rainfall in January: 5.67"
The wettest month (with the highest rainfall) is January (5.67").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in January
Mill A, WA
- Average rainfall days in January: 17.7 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is August (4.2 days).
Average snowfall in January
Mill A, WA
- Average snowfall in January: 3.82"
The month with the highest snowfall is February (4.76").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Mill A, WA
- Average snowfall days in January: 3.4 days
The month with the highest number of snowfall days is December (4.1 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 A, WA
- 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: 3h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Mill A, WA
- Average sunshine days in January: 10.2 days
The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (8.4 days).
Average UV index in January
Mill A, WA
- Average UV index in January: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in January
Mill A, WA
- Average cloud cover in January: 64
The months with the most cloud cover are January and February (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 17).
Average visibility in January
Mill A, WA
- Average visibility in January: 4mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (4mi).
Mill A, Washington, USA
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