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 shift into January uncovers an average high-temperature of a wintry 32.4°F (0.2°C), subtly different from the previous month. Nighttime temperature in Clayton lowers to an average of 21.2°F (-6°C) in January.Humidity
January is the most humid month, with an average relative humidity of 92%.Rainfall
The month with the most rainfall in Clayton is January, when the rain falls for 8.8 days and typically aggregates up to 2.4" (61mm) of precipitation.Snowfall
Months with snowfall in Clayton are January through May, September through December. The month with the most snowfall is January, when snow falls for 16 days and typically aggregates up to 13.23" (336mm) of snow.Daylight
In Clayton, the average length of the day in January is 8h and 55min.On the first day of the month, sunrise is at 7:39 am and sunset at 4:07 pm. On the last day of January, sunrise is at 7:19 am and sunset at 4:48 pm PST.
Sunshine
The month with the least sunshine is January, with an average of 3.4h of sunshine.UV index
The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: The average daily UV index of 2 in January transforms into the following instructions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold is it in Clayton in January?
What is the most humid month in Clayton?
What is the average humidity in January in Clayton?
What is the rainiest month in Clayton?
How much does it rain in Clayton in January?
What is the snowiest month in Clayton?
How many days does it snow in January in Clayton?
How many hours of daylight does Clayton have in January?
When is the sunrise / sunset in January in Clayton?
What is the month with the least sunshine in Clayton?
How many hours of sunshine does Clayton have in January?
How high is the UV index in January in Clayton?
Average temperature in January
Clayton, WA
- Average high temperature in January: 32.4°F
The warmest month (with the highest average high temperature) is August (84°F).
The month with the lowest average high temperature is December (31.3°F).
- Average low temperature in January: 21.2°F
The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).
Average pressure in January
Clayton, WA
- Average pressure in January: 30.19"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in January
Clayton, WA
- Average wind speed in January: 4.1mph
The windiest month (with the highest average wind speed) is April (5.6mph).
The calmest month (with the lowest average wind speed) is December (4mph).
Average humidity in January
Clayton, WA
- Average humidity in January: 92%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is August (43%).
Average rainfall in January
Clayton, WA
- Average rainfall in January: 2.4"
The wettest month (with the highest rainfall) is January (2.4").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in January
Clayton, WA
- Average rainfall days in January: 8.8 days
The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is August (5.1 days).
Average snowfall in January
Clayton, WA
- Average snowfall in January: 13.23"
The month with the highest snowfall is January (13.23").
The months with the least snowfall are June, July and August (0").
Average snowfall days in January
Clayton, WA
- Average snowfall days in January: 16 days
The month with the highest number of snowfall days is December (16.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Clayton, 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: 3h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in January
Clayton, WA
- Average sunshine days in January: 11.6 days
The month with the most sunshine days is July (24.2 days).
The month with the least sunshine days is March (9.7 days).
Average UV index in January
Clayton, 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 February, November and December (UV index 1).
Average cloud cover in January
Clayton, WA
- Average cloud cover in January: 64
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in January
Clayton, WA
- Average visibility in January: 3mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
Clayton, Washington, USA
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