September weather forecast
Redmond, OR

The bright yellow eye and rays of the setting sun seen over the hilly and rocky scape in the Smith Rock State Park in Redmond, Oregon
The bright yellow eye and rays of the setting sun seen over the hilly and rocky scape in the Smith Rock State Park in Redmond, Oregon

Weather in September

The first month of the autumn, September, is still a pleasant month in Redmond, Oregon, with an average temperature varying between 47.1°F (8.4°C) and 72°F (22.2°C).

Temperature

In Redmond, the average high-temperature in September drops from a moderately hot 81°F (27.2°C) in August to an agreeable 72°F (22.2°C). The average low-temperature, in September, is 47.1°F (8.4°C).

Humidity

In Redmond, the average relative humidity in September is 54%.

Rainfall

In Redmond, Oregon, in September, it is raining for 5.9 days, with typically 0.63" (16mm) of accumulated precipitation. Throughout the year, in Redmond, there are 125.1 rainfall days, and 12.48" (317mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Redmond are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 51.4 snowfall days, and 24.53" (623mm) of snow is accumulated.

Daylight

In Redmond, the average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 6:28 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:47 pm PDT.

Sunshine

In Redmond, the average sunshine in September is 10.9h.

UV index

The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in September in Redmond?

The average high-temperature, in September, in Redmond, is 72°F (22.2°C), while the average low-temperature is 47.1°F (8.4°C). in August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is estimated at 80.6°F (27°C).

What is the average humidity in September in Redmond?

The average relative humidity in September in Redmond, Oregon, is 54%.

How many days does it rain in September in Redmond?

In Redmond, Oregon, during September, the rain falls for 5.9 days and regularly aggregates up to 0.63" (16mm) of precipitation.

When does it start snowing in Redmond?

September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.08" (2mm) of snow.

How many hours of daylight does Redmond have in September?

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

When are sunrise and sunset in September in Redmond?

On the first day of September in Redmond, sunrise is at 6:28 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:47 pm PDT.

How many hours of sunshine does Redmond have in September?

In Redmond, Oregon, the average sunshine duration in September is 10.9h.

What is the UV index reading in September in Redmond?

The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe 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
Redmond, OR

Average temperature in September - Redmond, OR
  • Average high temperature in September: 72°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is December (37°F).

  • Average low temperature in September: 47.1°F

The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).

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Average pressure in September
Redmond, OR

Average pressure in September - Redmond, OR
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).

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Average wind speed in September
Redmond, OR

Average wind speed in September - Redmond, OR
  • Average wind speed in September: 5.2mph

The windiest months (with the highest average wind speed) are March and April (6.6mph).
The calmest months (with the lowest average wind speed) are August and September (5.2mph).

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Average humidity in September
Redmond, OR

Average humidity in September - Redmond, OR
  • Average humidity in September: 54%

The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are July and August (47%).

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Average rainfall in September
Redmond, OR

Average rainfall in September - Redmond, OR
  • Average rainfall in September: 0.63"

The wettest month (with the highest rainfall) is December (1.73").
The driest month (with the least rainfall) is July (0.24").

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Average rainfall days in September
Redmond, OR

Average rainfall days in September - Redmond, OR
  • Average rainfall days in September: 5.9 days

The month with the highest number of rainy days is March (16.1 days).
The month with the least rainy days is July (3.3 days).

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Average snowfall in September
Redmond, OR

Average snowfall in September - Redmond, OR
  • Average snowfall in September: 0.08"

The month with the highest snowfall is February (6.26").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Redmond, OR

Average snowfall days in September - Redmond, OR
  • Average snowfall days in September: 0.3 days

The month with the highest number of snowfall days is December (12.1 days).
The months with the least snowfall days are June, July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 28min).
The month with the shortest days is December (Average daylight: 8h and 55min).

  • Average sunshine in September: 10h and 54min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).

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Average sunshine days in September
Redmond, OR

Average sunshine days in September - Redmond, OR
  • Average sunshine days in September: 21.7 days

The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (10.2 days).

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Average UV index in September
Redmond, OR

Average UV index in September - Redmond, 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).

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Average cloud cover in September
Redmond, OR

Average cloud cover in September - Redmond, OR
  • Average cloud cover in September: 16

The month with the most cloud cover is December (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 10).

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Average visibility in September
Redmond, OR

Average visibility in September - Redmond, OR
  • Average visibility in September: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).

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