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

September weather forecast and climate
Heppner, OR

September, the first month of the autumn, in Heppner, is also a moderately hot month, with temperature in the range of an average high of 76.6°F (24.8°C) and an average low of 46.9°F (8.3°C).

Temperature

In September, the average high-temperature decreases, from a warm 85.6°F (29.8°C) in August, to a still moderately hot 76.6°F (24.8°C). In September, in Heppner, Oregon, the average low-temperature is 46.9°F (8.3°C).

Rainfall

During September, Heppner regularly aggregates up to 0.5" (13.7mm) of precipitation. During the entire year, Heppner aggregates up to 13.9" (352.4mm) of precipitation.

Snowfall

In Heppner, it doesn't snow. In October, it regularly snows. Throughout the year, in Heppner, 12.1" (307.4mm) of snow is accumulated.

Daylight

In September, the average length of the day is 12.5h.

What is the temperature in September in Heppner?

In Heppner, in September, the average high-temperature is 76.6°F (24.8°C), and the average low-temperature is 46.9°F (8.3°C).

How much does it rain in Heppner in September?

Throughout September, in Heppner, 0.5" (13.7mm) of precipitation is accumulated.

Does it snow in Heppner in September?

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

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

In Heppner, Oregon, the average length of the day in September is 12.5h.
Average temperature in September - Heppner, OR
  • Average high temperature in September: 76.6°F

The warmest month (with the highest average high temperature) is July (85.9°F).
The month with the lowest average high temperature is December (41.2°F).

  • Average low temperature in September: 46.9°F

The month with the highest average low temperature is July (53.7°F).
The coldest month (with the lowest average low temperature) is December (26.1°F).

Average rainfall in September - Heppner, OR
  • Average rainfall in September: 0.5"

The wettest month (with the highest rainfall) is May (1.7").
The driest month (with the lowest rainfall) is July (0.3").

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

The month with the highest snowfall is December (4.2").
Months with the lowest snowfall are May, June, July, August and September (0").

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

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).