September weather forecast
Klamath Falls, OR

Calm water on either side of a wavy road leading to the far seen hilly scape near the iconic Klamath Falls in Oregon
Calm water on either side of a wavy road leading to the far seen hilly scape near the iconic Klamath Falls in Oregon

Weather in September

September, the first month of the autumn in Klamath Falls, is also an agreeable month, with an average temperature fluctuating between 43.7°F (6.5°C) and 72.7°F (22.6°C).

Temperature

In Klamath Falls, the average high-temperature in September marginally drops from a moderately hot 80.8°F (27.1°C) in August to a pleasant 72.7°F (22.6°C). In Klamath Falls, in September, the average low-temperature is 43.7°F (6.5°C).

Humidity

The average relative humidity in September is 53%.

Rainfall

In Klamath Falls, during September, the rain falls for 4.1 days and regularly aggregates up to 0.43" (11mm) of precipitation. Throughout the year, there are 100.4 rainfall days, and 13.15" (334mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall. September is the first month it typically snows in Klamath Falls, Oregon. Throughout September, in the average 0.2 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 70.5 snowfall days, and 42.52" (1080mm) of snow is accumulated.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of September, sunrise is at 6:32 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:50 pm PDT.

Sunshine

The average sunshine in September is 11h.

UV index

In Klamath Falls, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. 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 average humidity in September in Klamath Falls?

The average relative humidity in September in Klamath Falls is 53%.

How many days does it rain in September in Klamath Falls?

In Klamath Falls, Oregon, in September, it is raining for 4.1 days, with typically 0.43" (11mm) of accumulated precipitation.

When does it start to snow in Klamath Falls?

September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.12" (3mm) of snow.

How many hours of daylight does Klamath Falls have in September?

The average day length in September in Klamath Falls is 12h and 28min.

When are sunrise and sunset in September in Klamath Falls?

In September, on the first day of the month, sunrise is at 6:32 am and sunset at 7:41 pm. On the last day of the month, in Klamath Falls, sunrise is at 7:03 am and sunset at 6:50 pm PDT.

How many hours of sunshine does Klamath Falls have in September?

In September, the average sunshine duration in Klamath Falls, Oregon, is 11h.

How high is the UV index in September in Klamath Falls?

In Klamath Falls, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.

Average temperature in September
Klamath Falls, OR

Average temperature in September - Klamath Falls, OR
  • Average high temperature in September: 72.7°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is December (36.9°F).

  • Average low temperature in September: 43.7°F

The month with the highest average low temperature is July (48.6°F).
The coldest month (with the lowest average low temperature) is December (25.2°F).

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Average pressure in September
Klamath Falls, OR

Average pressure in September - Klamath Falls, OR
  • Average pressure in September: 29.98"Hg

The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).

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Average wind speed in September
Klamath Falls, OR

Average wind speed in September - Klamath Falls, OR
  • Average wind speed in September: 5mph

The windiest months (with the highest average wind speed) are March and April (6.3mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).

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Average humidity in September
Klamath Falls, OR

Average humidity in September - Klamath Falls, OR
  • Average humidity in September: 53%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (49%).

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Average rainfall in September
Klamath Falls, OR

Average rainfall in September - Klamath Falls, OR
  • Average rainfall in September: 0.43"

The wettest month (with the highest rainfall) is December (2.09").
The driest month (with the least rainfall) is July (0.2").

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Average rainfall days in September
Klamath Falls, OR

Average rainfall days in September - Klamath Falls, OR
  • Average rainfall days in September: 4.1 days

The month with the highest number of rainy days is April (13.1 days).
The month with the least rainy days is August (3.6 days).

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Average snowfall in September
Klamath Falls, OR

Average snowfall in September - Klamath Falls, OR
  • Average snowfall in September: 0.12"

The month with the highest snowfall is December (10.63").
The months with the least snowfall are July and August (0").

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Average snowfall days in September
Klamath Falls, OR

Average snowfall days in September - Klamath Falls, OR
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is December (13.5 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in September /
Average sunshine in September
Klamath Falls, OR

Average daylight in September / Average sunshine in September - Klamath Falls, OR
  • Average daylight in September: 12h and 28min

The month with the longest days is June (Average daylight: 15h and 13min).
The month with the shortest days is December (Average daylight: 9h and 9min).

  • Average sunshine in September: 11h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is January (Average sunshine: 5.3h).

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Average sunshine days in September
Klamath Falls, OR

Average sunshine days in September - Klamath Falls, OR
  • Average sunshine days in September: 23.7 days

The month with the most sunshine days is August (24.9 days).
The month with the least sunshine days is March (10.6 days).

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Average UV index in September
Klamath Falls, OR

Average UV index in September - Klamath Falls, OR
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in September
Klamath Falls, OR

Average cloud cover in September - Klamath Falls, OR
  • Average cloud cover in September: 14

The month with the most cloud cover is December (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 8).

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Average visibility in September
Klamath Falls, OR

Average visibility in September - Klamath Falls, OR
  • Average visibility in September: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

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