September weather forecastMetaline Falls, WA
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Metaline Falls, Washington, with an average temperature ranging between max 66°F (18.9°C) and min 39.4°F (4.1°C).Temperature
During Metaline Falls's transition into September, the average high-temperature lessens, moving from a moderately hot 76.8°F (24.9°C) in August to a refreshing 66°F (18.9°C). Metaline Falls anticipates a considerable daily temperature fluctuation in September, with low temperatures averaging a cold 39.4°F (4.1°C).Humidity
In Metaline Falls, the average relative humidity in September is 65%.Rainfall
In Metaline Falls, Washington, in September, it is raining for 11.1 days, with typically 1.06" (27mm) of accumulated precipitation. In Metaline Falls, during the entire year, the rain falls for 147.3 days and collects up to 20.12" (511mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Metaline Falls. Throughout September, in the average 0.2 snowfall days, it receives 0.51" (13mm) of snow. In Metaline Falls, during the entire year, snow falls for 95.8 days and aggregates up to 50.39" (1280mm) of snow.Daylight
The average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:07 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:29 pm PDT.
Sunshine
In Metaline Falls, the average sunshine in September is 9.9h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the average maximum UV index of 3 translates into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Direct Sun exposure should be minimized especially during midday when radiation is most intense. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Metaline Falls, WA
- Average high temperature in September: 66°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.6°F).
- Average low temperature in September: 39.4°F
The month with the highest average low temperature is August (46.6°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in September
Metaline Falls, WA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Metaline Falls, WA
- Average wind speed in September: 3.5mph
The windiest months (with the highest average wind speed) are April, May and June (3.9mph).
The calmest months (with the lowest average wind speed) are January and December (3.2mph).
Average humidity in September
Metaline Falls, WA
- Average humidity in September: 65%
The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Metaline Falls, WA
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is August (0.59").
Average rainfall days in September
Metaline Falls, WA
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is April (18.5 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in September
Metaline Falls, WA
- Average snowfall in September: 0.51"
The month with the highest snowfall is January (11.77").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Metaline Falls, WA
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (20.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Metaline Falls, WA
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 9h and 54min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Metaline Falls, WA
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is August (20.2 days).
The month with the least sunshine days is March (7.6 days).
Average UV index in September
Metaline Falls, WA
- Average UV index in September: 3
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 1).
Average cloud cover in September
Metaline Falls, WA
- Average cloud cover in September: 26
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Metaline Falls, WA
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
