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
September's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's warm 79.3°F (26.3°C) to a pleasant 70.9°F (21.6°C). Bly sees a consistent average low-temperature of 45.9°F (7.7°C) in September, indicating a substantial decrease from the day's temperature.Humidity
In September, the average relative humidity is 42%.Rainfall
In September, the rain falls for 5 days. Throughout September, 0.47" (12mm) of precipitation is accumulated. Throughout the year, there are 93.6 rainfall days, and 15.28" (388mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.39" (10mm) of snow. In Bly, during the entire year, snow falls for 72.8 days and aggregates up to 57.17" (1452mm) of snow.Daylight
In Bly, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:30 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:46 pm PDT.
Sunshine
In September, the average sunshine is 11h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When does it start to snow?
How many hours of daylight does Bly have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Bly have in September?
How high is the UV index in September?
Average temperature in September
Bly, OR
- Average high temperature in September: 70.9°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is December (34.3°F).
- Average low temperature in September: 45.9°F
The month with the highest average low temperature is July (51.4°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).
Average pressure in September
Bly, OR
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The months with the lowest atmospheric pressure are June and August (29.94"Hg).
Average wind speed in September
Bly, OR
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Bly, OR
- Average humidity in September: 42%
The months with the highest relative humidity are January and December (81%).
The month with the lowest relative humidity is August (36%).
Average rainfall in September
Bly, OR
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is December (2.28").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Bly, OR
- Average rainfall days in September: 5 days
The months with the highest number of rainy days are March, April and May (11.8 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in September
Bly, OR
- Average snowfall in September: 0.39"
The month with the highest snowfall is December (13.35").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Bly, OR
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (14.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Bly, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Bly, OR
- Average sunshine days in September: 24 days
The month with the most sunshine days is August (25 days).
The month with the least sunshine days is March (11.8 days).
Average UV index in September
Bly, OR
- 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, March, November and December (UV index 2).
Average cloud cover in September
Bly, OR
- Average cloud cover in September: 13
The months with the most cloud cover are March and December (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in September
Bly, OR
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Bly, Oregon, USA
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