September weather forecast
Klamath Falls, OR

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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 sees the initiation of the fall season in Klamath Falls, with a noticeable change in the weather pattern. The temperatures start to dip from the lofty heat of August, and the marginal increase in rainfall to 0.43" (11mm) sets the stage for the forthcoming winter. A decrease in daylight hours coupled with a gradual increase in humidity reflects the changing of the seasons. The town's pressure increases slightly, creating a calming and nurturing environment. Besides, it also showcases a pleasant transition between the warm summer and the incoming chilly winter season.

Temperature

In September, the average high-temperature marginally drops from a warm 80.8°F (27.1°C) in August to a pleasant 72.7°F (22.6°C). Klamath Falls anticipates a considerable drop in temperature at night in September, with an average low of 43.7°F (6.5°C).

Humidity

In Klamath Falls, the average relative humidity in September is 53%.

Rainfall

In Klamath Falls, in September, it is raining for 4.1 days, with typically 0.43" (11mm) of accumulated precipitation. In Klamath Falls, during the entire year, the rain falls for 100.4 days and collects up to 13.15" (334mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.12" (3mm) of snow. In Klamath Falls, during the entire year, snow falls for 70.5 days and aggregates up to 42.52" (1080mm) of snow.

Daylight

In Klamath Falls, Oregon, the average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:33 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:49 pm PDT.

Sunshine

The average sunshine in September in Klamath Falls is 11h.

UV index

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 3 suggests this advice:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

What is the temperature in September in Klamath Falls?

The high-temperature, in September, in Klamath Falls, is 72.7°F (22.6°C), while the low-temperature averages to 43.7°F (6.5°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in August is evaluated at 80.6°F (27°C).

What is the average humidity in September in Klamath Falls?

In September, the average relative humidity is 53%.

How much does it rain in Klamath Falls in September?

In September, the rain falls for 4.1 days. Throughout September, 0.43" (11mm) of precipitation is accumulated.

When does it start snowing in Klamath Falls?

September is the first month it typically snows in Klamath Falls. 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?

In September, the average day length in Klamath Falls, Oregon, is 12h and 28min.

What time are sunrise and sunset in September in Klamath Falls?

In September, on the first day of the month, sunrise is at 6:33 am and sunset at 7:40 pm. On the last day of the month, in Klamath Falls, sunrise is at 7:03 am and sunset at 6:49 pm PDT.

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

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

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

The average daily maximum UV index in September in Klamath Falls, Oregon, is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in September: 11h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).

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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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Klamath Falls, Oregon, USA

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