September weather forecastKlamath Falls, OR
September
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
Klamath Falls's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's warm 80.8°F (27.1°C) to an agreeable 72.7°F (22.6°C). Klamath Falls, during the nights of September, registers a substantial plunge from the daytime high, averaging at a frosty 43.7°F (6.5°C).Humidity
In Klamath Falls, the average relative humidity in September is 53%.Rainfall
In Klamath Falls, in September, during 4.1 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, there are 100.4 rainfall days, and 13.15" (334mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. 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, Oregon, during the entire year, snow falls for 70.5 days and aggregates up to 42.52" (1080mm) of snow.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:33 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:49 pm PDT.
Sunshine
In September, the average sunshine is 11h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 3 during September leads to these advisories:
Take precautions - Protection against sun damage is advised. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in September /
Average sunshine in September
Klamath Falls, OR
- Average daylight in September: 12h and 30min
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).
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).
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).
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).
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).
