Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In September, the meteorological conditions change slightly, with the average high-temperature moving from a pleasant 68°F (20°C) in August to a comfortable 62.6°F (17°C). Blyn experiences an average low-temperature of 49.3°F (9.6°C) in month of September.Humidity
The average relative humidity in September is 79%.Rainfall
In Blyn, in September, during 12.9 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Blyn, during the entire year, the rain falls for 174.1 days and collects up to 19.45" (494mm) of precipitation.Snowfall
May through October are months without snowfall in Blyn, Washington.Daylight
In September, the average length of the day is 12h and 33min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:52 pm PDT.
Sunshine
The average sunshine in September is 9.4h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, an average UV index of 4 transforms into the following instructions:
Be vigilant - Suggestions to stave off sun damage are provided. When the Sun is at its strongest around midday, find shade and limit exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September in Blyn?
When is the sunrise / sunset in September?
How many hours of sunshine does Blyn have in September?
What are the months with the highest UV index?
What is the UV index intensity in September?
Average temperature in September
Blyn, WA
- Average high temperature in September: 62.6°F
The warmest month (with the highest average high temperature) is August (68°F).
The month with the lowest average high temperature is December (41.2°F).
- Average low temperature in September: 49.3°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is February (34.3°F).
Average pressure in September
Blyn, WA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in September
Blyn, WA
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is November (5.9mph).
The calmest months (with the lowest average wind speed) are August and September (3.7mph).
Average humidity in September
Blyn, WA
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are July and August (75%).
Average rainfall in September
Blyn, WA
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is January (2.56").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days in September
Blyn, WA
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.8 days).
Average snowfall in September
Blyn, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Blyn, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Blyn, WA
- Average daylight in September: 12h and 4min
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 24min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Blyn, WA
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is August (21.4 days).
The month with the least sunshine days is March (8.9 days).
Average UV index in September
Blyn, WA
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Blyn, WA
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Blyn, 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).
Blyn, Washington, USA
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