January weather forecastSpanaway, WA
January
Weather in January
January, like December, is another chilly winter month in Spanaway, Washington, with an average temperature fluctuating between 45.5°F (7.5°C) and 34.9°F (1.6°C).Temperature
Spanaway records an average high-temperature of a still frosty 45.5°F (7.5°C) in January, closely mirroring the climate of the previous month. An average nighttime temperature of 34.9°F (1.6°C) is witnessed throughout January.Humidity
January and December, with an average relative humidity of 87%, are the most humid months.Rainfall
In January, the rain falls for 18.2 days. Throughout January, 4.53" (115mm) of precipitation is accumulated. Throughout the year, there are 176.3 rainfall days, and 30.28" (769mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Spanaway, in January, during 1.9 snowfall days, 1.14" (29mm) of snow is typically accumulated. In Spanaway, during the entire year, snow falls for 9.4 days and aggregates up to 4.84" (123mm) of snow.Daylight
The average length of the day in January is 9h and 1min.On the first day of January, sunrise is at 7:55 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 5:10 pm PST.
Sunshine
In Spanaway, the average sunshine in January is 4.2h.UV index
The months with the lowest UV index 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 unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 2 during January leads to these advisories:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Experience reduced UV exposure by about half when donning a wide-brim hat. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Spanaway, WA
- Average high temperature in January: 45.5°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 (43.7°F).
- Average low temperature in January: 34.9°F
The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is February (34.2°F).
Average pressure in January
Spanaway, 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
Spanaway, WA
- Average wind speed in January: 5mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in January
Spanaway, WA
- Average humidity in January: 87%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is July (69%).
Average rainfall in January
Spanaway, WA
- Average rainfall in January: 4.53"
The wettest month (with the highest rainfall) is December (4.76").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in January
Spanaway, WA
- Average rainfall days in January: 18.2 days
The month with the highest number of rainy days is March (19.9 days).
The month with the least rainy days is August (5.1 days).
Average snowfall in January
Spanaway, WA
- Average snowfall in January: 1.14"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Spanaway, 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
Spanaway, 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 12min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in January
Spanaway, WA
- Average sunshine days in January: 11.1 days
The month with the most sunshine days is August (23.3 days).
The months with the least sunshine days are February and March (9 days).
Average UV index in January
Spanaway, 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 January, February, November and December (UV index 2).
Average cloud cover in January
Spanaway, WA
- Average cloud cover in January: 58
The months with the most cloud cover are January and December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in January
Spanaway, WA
- Average visibility in January: 5mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (5mi).
