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 onset of January manifests an average high-temperature of a still frosty 44.6°F (7°C), demonstrating a minor variation from the preceding month. Throughout the month of January, Vashon observes an average nighttime temperature of 35.2°F (1.8°C).Humidity
January and December, with an average relative humidity of 85%, are the most humid months in Vashon.Rainfall
In Vashon, Washington, during January, the rain falls for 12.3 days and regularly aggregates up to 1.54" (39mm) of precipitation. Throughout the year, in Vashon, there are 138.2 rainfall days, and 14.09" (358mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Vashon, during January, snow falls for 1.9 days and regularly aggregates up to 0.83" (21mm) of snow. Throughout the year, in Vashon, there are 9.8 snowfall days, and 4.72" (120mm) of snow is accumulated.Daylight
In Vashon, the average length of the day in January is 8h and 59min.On the first day of the month, sunrise is at 7:57 am and sunset at 4:29 pm. On the last day of January, in Vashon, Washington, sunrise is at 7:37 am and sunset at 5:09 pm PST.
Sunshine
In January, the average sunshine in Vashon is 4.2h.UV index
The months with the lowest UV index in Vashon are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 2 in January converts into the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
How cold is it in Vashon in January?
What is the most humid month in Vashon?
What is the average humidity in January in Vashon?
How many days does it rain in January in Vashon?
How many days does it snow in January in Vashon?
What is the average length of the day in January in Vashon?
What time are sunrise and sunset in January in Vashon?
How many hours of sunshine does Vashon have in January?
What are the months with the lowest UV index in Vashon?
How high is the UV index in January in Vashon?
Average temperature in January
Vashon, WA
- Average high temperature in January: 44.6°F
The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in January: 35.2°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in January
Vashon, WA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in January
Vashon, WA
- Average wind speed in January: 5.2mph
The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are July and August (3.6mph).
Average humidity in January
Vashon, WA
- Average humidity in January: 85%
The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (68%).
Average rainfall in January
Vashon, WA
- Average rainfall in January: 1.54"
The wettest month (with the highest rainfall) is December (2.2").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in January
Vashon, WA
- Average rainfall days in January: 12.3 days
The month with the highest number of rainy days is April (14.9 days).
The month with the least rainy days is August (5.7 days).
Average snowfall in January
Vashon, WA
- Average snowfall in January: 0.83"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Vashon, WA
- Average snowfall days in January: 1.9 days
The month with the highest number of snowfall days is February (3.4 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
Vashon, 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: 4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in January
Vashon, WA
- Average sunshine days in January: 15.6 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (13 days).
Average UV index in January
Vashon, WA
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Vashon, WA
- Average cloud cover in January: 57
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in January
Vashon, WA
- Average visibility in January: 5mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
Vashon, Washington, USA
Weather forecast for your location
2. Allow the app to use your location
