September weather forecastGoose Prairie, WA
September
Weather in September
September, the first month of the autumn in Goose Prairie, is still a comfortable month, with temperature in the range of an average low of 40.5°F (4.7°C) and an average high of 63.9°F (17.7°C).Temperature
September involves a decrease in temperature, down from a moderately hot 74.1°F (23.4°C) in August to a comfortable 63.9°F (17.7°C). In Goose Prairie, the average temperature during the nights of September marks a significant drop from the daily high, settling at an icy 40.5°F (4.7°C).Humidity
The average relative humidity in September is 70%.Rainfall
In September, the rain falls for 9.5 days. Throughout September, 1.26" (32mm) of precipitation is accumulated. Throughout the year, in Goose Prairie, there are 96.1 rainfall days, and 36.54" (928mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through July, September through December. September is the first month it typically snows in Goose Prairie. Throughout September, in the average 2 snowfall days, it receives 1.14" (29mm) of snow. Throughout the year, there are 147 snowfall days, and 210.2" (5339mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:45 pm PDT.
Sunshine
The average sunshine in September is 9.7h.UV index
In Goose Prairie, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 3 during September translates into these guidelines:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. 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
Average temperature in September
Goose Prairie, WA
- Average high temperature in September: 63.9°F
The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is December (30.4°F).
- Average low temperature in September: 40.5°F
The month with the highest average low temperature is August (45.1°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).
Average pressure in September
Goose Prairie, WA
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).
Average wind speed in September
Goose Prairie, WA
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).
Average humidity in September
Goose Prairie, WA
- Average humidity in September: 70%
The month with the highest relative humidity is February (93%).
The months with the lowest relative humidity are July and August (63%).
Average rainfall in September
Goose Prairie, WA
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is January (6.14").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Goose Prairie, WA
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is October (12.6 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in September
Goose Prairie, WA
- Average snowfall in September: 1.14"
The month with the highest snowfall is January (41.73").
The month with the least snowfall is August (0").
Average snowfall days in September
Goose Prairie, WA
- Average snowfall days in September: 2 days
The month with the highest number of snowfall days is March (22.2 days).
The month with the least snowfall days is August (0.3 days).
Average daylight in September /
Average sunshine in September
Goose Prairie, 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: 9h and 42min
The month with the most sunshine is August (Average sunshine: 11h and 36min).
The months with the least sunshine are January and February (Average sunshine: 3h and 18min).
Average sunshine days in September
Goose Prairie, WA
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is July (23.6 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in September
Goose Prairie, WA
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Goose Prairie, WA
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 21).
Average visibility in September
Goose Prairie, WA
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (3mi).
