September weather forecast
Roseburg, OR

Weather in September

September, the first month of the autumn in Roseburg, is still a warm month, with an average temperature fluctuating between 74.3°F (23.5°C) and 45°F (7.2°C).

Temperature

In Roseburg, the average high-temperature in September slightly decreases from a warm 80.8°F (27.1°C) in August to a still moderately hot 74.3°F (23.5°C). The average low-temperature, in September, is 45°F (7.2°C).

Humidity

In September, the average relative humidity in Roseburg, Oregon, is 74%.

Rainfall

In Roseburg, it is raining for 4.3 days, with typically 0.43" (11mm) of accumulated precipitation. In Roseburg, during the entire year, the rain falls for 105 days and collects up to 9.57" (243mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September in Roseburg is 12h and 29min.
On the first day of the month, sunrise is at 6:37 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:56 pm PDT.

Sunshine

In September, the average sunshine in Roseburg 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 moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 3 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Roseburg?

In September, in Roseburg, the average high-temperature is 74.3°F (23.5°C), and the average low-temperature is 45°F (7.2°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is calculated to be 84.2°F (29°C).

What is the average humidity in September in Roseburg?

The average relative humidity in September is 74%.

How much does it rain in Roseburg in September?

In September, in Roseburg, the rain falls for 4.3 days. Throughout September, 0.43" (11mm) of precipitation is accumulated.

When it does not snow in Roseburg?

In Roseburg, Oregon, snow does not fall in April through October.

How many hours of daylight does Roseburg have in September?

In Roseburg, the average day length in September is 12h and 29min.

When are sunrise and sunset in September in Roseburg?

On the first day of September, sunrise is at 6:37 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:56 pm PDT.

How many hours of sunshine does Roseburg have in September?

In Roseburg, Oregon, the average sunshine duration in September is 9.7h.

What is the UV index reading in September in Roseburg?

In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Roseburg, OR

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).

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Average pressure in September
Roseburg, OR

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).

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Average wind speed in September
Roseburg, OR

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).

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Average humidity in September
Roseburg, OR

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%).

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Average rainfall in September
Roseburg, OR

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").

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Average rainfall days in September
Roseburg, OR

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).

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Average snowfall in September
Roseburg, OR

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").

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Average snowfall days in September
Roseburg, OR

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).

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Average daylight in September /
Average sunshine in September
Roseburg, OR

Average daylight in September / Average sunshine in September - Roseburg, OR
  • Average daylight in September: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 20min).
The month with the shortest days is December (Average daylight: 9h and 3min).

  • 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).

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Average sunshine days in September
Roseburg, OR

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).

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Average UV index in September
Roseburg, OR

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).

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Average cloud cover in September
Roseburg, OR

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).

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Average visibility in September
Roseburg, OR

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).

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