John Day
Oregon, USA
Long term weather forecast
Long term weather forecast

September weather forecast and Climate
John Day, OR

  • Average high temperature in September: 78.9°F

Warmest month (with highest average high temperature) is July (88.4°F).
Month with lowest average high temperature is January (41.5°F).

  • Average low temperature in September: 40.7°F

Month with highest average low temperature is July (49.1°F).
Coldest month (with lowest average low temperature) is January (22.3°F).

  • Average rainfall in September: 0.7"

Wettest month (with highest rainfall) is May (1.8").
Driest month (with lowest rainfall) is July (0.5").

  • Average rainfall days in September: 5 days

Months with highest number of rainy days are January, March, April, May, November and December (11 days).
Month with lowest number of rainy days is July (3 days).

  • Average snowfall in September: 0"

Month with highest snowfall is January (5.9").
Months with lowest snowfall are June, July, August and September (0").