September weather forecastRoseburg, OR
September
Weather in September
September witnesses the arrival of autumn in Roseburg, bringing a noticeable drop in temperature. Rainfall occurrences increase to 0.43" (11mm), marking the end of the dry season. Despite shorter daylight spans, Roseburg still basks in ample sunshine, making it an enjoyable time for outdoor activities. The onset of fall imparts an intrinsic charm to the city's landscape.Temperature
With the commencement of September, Roseburg records a moderate temperature decline, with the average high easing from August's moderately hot 80.8°F (27.1°C) to a still warm 74.3°F (23.5°C). A steady average of 45°F (7.2°C) throughout September underscores a considerable divergence from the daytime high.Humidity
In Roseburg, the average relative humidity in September is 74%.Rainfall
In Roseburg, in September, during 4.3 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. In Roseburg, during the entire year, the rain falls for 105 days and collects up to 9.57" (243mm) of precipitation.Snowfall
In Roseburg, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September in Roseburg, sunrise is at 6:38 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:55 pm PDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The average daily UV index of 3 in September transforms into the following instructions:
Make use of precautions - It is urged to ward off sun damage. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Roseburg, OR
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is August (80.8°F).
The month with the lowest average high temperature is December (45.9°F).
- Average low temperature in September: 45°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 (33.3°F).
Average pressure in September
Roseburg, 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
Roseburg, OR
- Average wind speed in September: 3.2mph
The windiest months (with the highest average wind speed) are January and March (3.9mph).
The calmest months (with the lowest average wind speed) are September and October (3.2mph).
Average humidity in September
Roseburg, 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
Roseburg, OR
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is December (1.46").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
Roseburg, OR
- Average rainfall days in September: 4.3 days
The month with the highest number of rainy days is March (13.5 days).
The month with the least rainy days is August (3.1 days).
Average snowfall in September
Roseburg, OR
- Average snowfall in September: 0"
The month with the highest snowfall is November (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Roseburg, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.5 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
Roseburg, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 42min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in September
Roseburg, OR
- Average sunshine days in September: 24.2 days
The month with the most sunshine days is August (25.1 days).
The month with the least sunshine days is February (14.6 days).
Average UV index in September
Roseburg, 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, November and December (UV index 2).
Average cloud cover in September
Roseburg, OR
- Average cloud cover in September: 33
The month with the most cloud cover is March (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Roseburg, OR
- Average visibility in September: 4mi
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (4mi).
