September weather forecastStarbuck, WA
September
Weather in September
The first month of the autumn, September, is still a warm month in Starbuck, Washington, with an average temperature varying between 54.1°F (12.3°C) and 74.1°F (23.4°C).Temperature
The average high-temperature drops in September, from August's moderately hot 84.2°F (29°C) to a still warm 74.1°F (23.4°C). September is noted for a mean low-temperature of 54.1°F (12.3°C).Humidity
The average relative humidity in September in Starbuck is 46%.Rainfall
In Starbuck, in September, during 6.9 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. Throughout the year, there are 142.4 rainfall days, and 15.39" (391mm) of precipitation is accumulated.Snowfall
Months with snowfall in Starbuck are January through May, September, November and December. September is the first month it typically snows in Starbuck. Throughout September, in the average 0.1 snowfall days, it receives 0.24" (6mm) of snow. Throughout the year, there are 29 snowfall days, and 13.7" (348mm) of snow is accumulated.Daylight
In September, the average length of the day in Starbuck, Washington, is 12h and 32min.On the first day of the month, sunrise is at 6:13 am and sunset at 7:30 pm. On the last day of September, in Starbuck, sunrise is at 6:50 am and sunset at 6:33 pm PDT.
Sunshine
The average sunshine in September is 10.5h.UV index
In Starbuck, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Starbuck, WA
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is August (61°F).
The coldest month (with the lowest average low temperature) is December (26.2°F).
Average pressure in September
Starbuck, WA
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in September
Starbuck, WA
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is September (6.3mph).
Average humidity in September
Starbuck, WA
- Average humidity in September: 46%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Starbuck, WA
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is December (1.97").
The driest months (with the least rainfall) are July and August (0.35").
Average rainfall days in September
Starbuck, WA
- Average rainfall days in September: 6.9 days
The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is July (5.1 days).
Average snowfall in September
Starbuck, WA
- Average snowfall in September: 0.24"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August and October (0").
Average snowfall days in September
Starbuck, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (8.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Starbuck, WA
- Average daylight in September: 12h and 30min
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 September: 10h and 30min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Starbuck, WA
- Average sunshine days in September: 20 days
The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is February (10 days).
Average UV index in September
Starbuck, WA
- Average UV index in September: 4
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 September
Starbuck, WA
- Average cloud cover in September: 17
The months with the most cloud cover are January and February (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in September
Starbuck, WA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
