January weather forecastStartup, WA
January
Weather in January
January, like December, in Startup, Washington, is another cold winter month, with temperature in the range of an average high of 39.9°F (4.4°C) and an average low of 29.7°F (-1.3°C).Temperature
Startup's average high-temperature in January is a still cold 39.9°F (4.4°C), marking an insignificant difference from the 38.3°F (3.5°C) of December. In Startup, January nights cool down to an average of 29.7°F (-1.3°C).Humidity
January through March, with an average relative humidity of 88%, are the most humid months in Startup.Rainfall
The month with the most rainfall is January, when the rain falls for 19.5 days and typically aggregates up to 7.8" (198mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Startup. In January, it is snowing for 2.4 days. Throughout January, 3.94" (100mm) of snow is accumulated. Throughout the year, there are 15.9 snowfall days, and 14.41" (366mm) of snow is accumulated.Daylight
The average length of the day in January is 8h and 56min.On the first day of the month, sunrise is at 7:56 am and sunset at 4:24 pm. On the last day of January, sunrise is at 7:35 am and sunset at 5:05 pm PST.
Sunshine
The months with the least sunshine are January and December, with an average of 3.7h of sunshine.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.Note: In January, the maximum UV index of 2 suggests these recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Startup, WA
- Average high temperature in January: 39.9°F
The warmest month (with the highest average high temperature) is August (73.4°F).
The month with the lowest average high temperature is December (38.3°F).
- Average low temperature in January: 29.7°F
The month with the highest average low temperature is August (48°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in January
Startup, WA
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in January
Startup, WA
- Average wind speed in January: 4.8mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).
Average humidity in January
Startup, WA
- Average humidity in January: 88%
The months with the highest relative humidity are January, February and March (88%).
The month with the lowest relative humidity is July (72%).
Average rainfall in January
Startup, WA
- Average rainfall in January: 7.8"
The wettest month (with the highest rainfall) is January (7.8").
The driest month (with the least rainfall) is August (0.79").
Average rainfall days in January
Startup, WA
- Average rainfall days in January: 19.5 days
The month with the highest number of rainy days is March (22.3 days).
The month with the least rainy days is August (7.9 days).
Average snowfall in January
Startup, WA
- Average snowfall in January: 3.94"
The month with the highest snowfall is February (5.43").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Startup, WA
- Average snowfall days in January: 2.4 days
The month with the highest number of snowfall days is February (5.2 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
Startup, WA
- Average daylight in January: 8h and 54min
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 42min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 42min).
Average sunshine days in January
Startup, WA
- Average sunshine days in January: 9.7 days
The month with the most sunshine days is August (19.9 days).
The month with the least sunshine days is March (7 days).
Average UV index in January
Startup, WA
- Average UV index in January: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in January
Startup, WA
- Average cloud cover in January: 60
The months with the most cloud cover are March and December (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in January
Startup, WA
- Average visibility in January: 4mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
