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
January reports an average high-temperature of a still cold 36.1°F (2.3°C), slightly varied from December's 34.7°F (1.5°C). Thornton sees an average low-temperature of 26.1°F (-3.3°C) during January.Humidity
With an average relative humidity of 85%, January is the most humid month.Rainfall
In Thornton, in January, during 10.5 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. In Thornton, during the entire year, the rain falls for 120.2 days and collects up to 14.69" (373mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Thornton, in January, during 8.7 snowfall days, 5.12" (130mm) of snow is typically accumulated. In Thornton, during the entire year, snow falls for 39.6 days and aggregates up to 22.68" (576mm) of snow.Daylight
The average length of the day in January is 9h and 1min.On the first day of January in Thornton, sunrise is at 7:35 am and sunset at 4:10 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:49 pm PST.
Sunshine
The months with the least sunshine are January and December, with an average of 4.6h of sunshine.UV index
The months with the lowest UV index in Thornton, Washington, are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 during January translates into the following directions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January in Thornton?
What is the most humid month?
What is the average humidity in January?
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?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Thornton have in January?
What is the month with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Thornton, WA
- Average high temperature in January: 36.1°F
The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (34.7°F).
- Average low temperature in January: 26.1°F
The month with the highest average low temperature is August (60.4°F).
The coldest month (with the lowest average low temperature) is December (24.6°F).
Average pressure in January
Thornton, WA
- Average pressure in January: 30.19"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in January
Thornton, WA
- Average wind speed in January: 7.3mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in January
Thornton, WA
- Average humidity in January: 85%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (37%).
Average rainfall in January
Thornton, WA
- Average rainfall in January: 1.73"
The wettest month (with the highest rainfall) is December (1.93").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in January
Thornton, WA
- Average rainfall days in January: 10.5 days
The month with the highest number of rainy days is April (14.6 days).
The month with the least rainy days is July (4.5 days).
Average snowfall in January
Thornton, WA
- Average snowfall in January: 5.12"
The month with the highest snowfall is February (6.69").
The months with the least snowfall are June, July and August (0").
Average snowfall days in January
Thornton, WA
- Average snowfall days in January: 8.7 days
The months with the highest number of snowfall days are February and December (9.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Thornton, 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 4min
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 36min).
Average sunshine days in January
Thornton, WA
- Average sunshine days in January: 15 days
The month with the most sunshine days is July (24.6 days).
The month with the least sunshine days is February (12.2 days).
Average UV index in January
Thornton, WA
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Thornton, WA
- Average cloud cover in January: 53
The months with the most cloud cover are January and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in January
Thornton, WA
- Average visibility in January: 5mi
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, February and December (5mi).
Thornton, Washington, USA
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