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
With September's onset, the weather reveals a slight temperature decrease, transitioning from 80.2°F (26.8°C) in August to a still moderately hot 73.9°F (23.3°C). Umpqua experiences a consistent, yet significant, drop from daily highs to a low-temperature of 45.3°F (7.4°C) throughout September.Humidity
In Umpqua, the average relative humidity in September is 74%.Rainfall
In Umpqua, during September, the rain falls for 7.7 days and regularly aggregates up to 1.26" (32mm) of precipitation. Throughout the year, there are 153.9 rainfall days, and 27.72" (704mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:55 pm PDT.
Sunshine
In September, the average sunshine is 9.6h.UV index
The average daily maximum UV index in September in Umpqua is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In September, the UV index of 3 transforms into the following advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
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 many days does it rain in September?
When it does not snow?
How many hours of daylight does Umpqua have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Umpqua have in September?
How high is the UV index in September?
Average temperature in September
Umpqua, OR
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (46°F).
- Average low temperature in September: 45.3°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).
Average pressure in September
Umpqua, OR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in September
Umpqua, OR
- Average wind speed in September: 3.2mph
The windiest months (with the highest average wind speed) are January and March (4mph).
The calmest month (with the lowest average wind speed) is September (3.2mph).
Average humidity in September
Umpqua, OR
- Average humidity in September: 74%
The months with the highest relative humidity are January, February and December (87%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in September
Umpqua, OR
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is December (4.17").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Umpqua, OR
- Average rainfall days in September: 7.7 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in September
Umpqua, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.89").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Umpqua, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 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
Umpqua, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in September
Umpqua, OR
- Average sunshine days in September: 20.5 days
The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is February (9.7 days).
Average UV index in September
Umpqua, OR
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Umpqua, OR
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Umpqua, OR
- Average visibility in September: 5mi
The months with the highest visibility are July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (4mi).
Umpqua, Oregon, USA
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