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
The shift from August to September includes a small decrease in the average high-temperature, from a moderately hot 80.8°F (27.1°C) to a still warm 74.3°F (23.5°C). September nights are characterized by a notable drop from daytime highs, with an average low-temperature of 45°F (7.2°C).Humidity
In September, the average relative humidity in Roseburg 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
The average sunshine in September is 9.7h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 3 during September translates into these guidelines:
Act with care - The suggestion to avoid sunburn is emphasized. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Frequently asked questions
What are the temperatures in Roseburg in September?
What is the average humidity in September in Roseburg?
How many days does it rain in September in Roseburg?
When it does not snow in Roseburg?
How many hours of daylight does Roseburg have in September?
What time are sunrise and sunset in September in Roseburg?
How many hours of sunshine does Roseburg have in September?
How high is the UV index in September in Roseburg?
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 3min
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 4min
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).
Roseburg, Oregon, USA
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