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

September weather forecast and Climate
Dallas, OR

  • The average high temperature in September: 77.6°F

The warmest month (with the highest average high temperature) is August (82.3°F).
The month with the lowest average high temperature is January (45.7°F).

  • The average low temperature in September: 46.6°F

The month with the highest average low temperature is July (49.5°F).
The coldest month (with the lowest average low temperature) is January (32.8°F).

  • The average rainfall in September: 1.3"

The wettest month (with the highest rainfall) is December (8.9").
The driest month (with the lowest rainfall) is July (0.4").

  • The average rainfall days in September: 6 days

Months with the highest number of rainy days are January and December (18 days).
Months with the lowest number of rainy days are July and August (3 days).

  • The average snowfall in September: 0"

The month with the highest snowfall is January (3.4").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").