Seneca
Oregon, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Seneca, OR

The first month of the autumn, September, is still a pleasant month in Seneca, Oregon, with average temperature ranging between max 72.1°F (22.3°C) and min 27.5°F (-2.5°C).

Temperature

In September, the average high-temperature slightly decreases, from a warm 80.6°F (27°C) in August, to an agreeable 72.1°F (22.3°C). In September, the average low-temperature is 27.5°F (-2.5°C).

Rainfall

In Seneca, during 4 rainfall days, 0.6" (16.3mm) of precipitation is typically accumulated. Throughout the year, there are 90 rainfall days, and 13.1" (333.3mm) of precipitation is accumulated.

Snowfall

In Seneca, it doesn't snow. In October, it regularly snows. Throughout the year, 57.8" (1468.2mm) of snow is accumulated.

Daylight

The average length of the day in September is 12.5h.

What is the temperature in September in Seneca?

The average high-temperature, in September, in Seneca, Oregon, is 72.1°F (22.3°C), while the average low-temperature is 27.5°F (-2.5°C).

How much does it rain in Seneca in September?

In September, in Seneca, Oregon, the rain falls for 4 days. Throughout September, 0.6" (16.3mm) of precipitation is accumulated.

Does it snow in Seneca in September?

In Seneca, Oregon, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Seneca?

In September, the average length of the day is 12.5h.
Average temperature in September - Seneca, OR
  • Average high temperature in September: 72.2°F

The warmest month (with the highest average high temperature) is July (81.8°F).
The month with the lowest average high temperature is January (34.5°F).

  • Average low temperature in September: 27.5°F

The month with the highest average low temperature is July (37.8°F).
The coldest month (with the lowest average low temperature) is January (9.2°F).

Average rainfall in September - Seneca, OR
  • Average rainfall in September: 0.6"

The wettest month (with the highest rainfall) is December (1.7").
The driest month (with the lowest rainfall) is July (0.5").

Average rainfall days in September - Seneca, OR
  • Average rainfall days in September: 4 days

The month with the highest number of rainy days is December (12 days).
Months with the lowest number of rainy days are July and August (3 days).

Average snowfall in September - Seneca, OR
  • Average snowfall in September: 0"

The month with the highest snowfall is December (15").
Months with the lowest snowfall are June, July, August and September (0").

Average daylight in September - Seneca, OR
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).