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

September weather forecast and Climate
John Day, OR

  • The average high temperature in September: 26.1°C

The warmest month (with the highest average high temperature) is July (31.3°C).
The month with the lowest average high temperature is January (5.3°C).

  • The average low temperature in September: 4.8°C

The month with the highest average low temperature is July (9.5°C).
The coldest month (with the lowest average low temperature) is January (-5.4°C).

  • The average rainfall in September: 17.8mm

The wettest month (with the highest rainfall) is May (45.7mm).
The driest month (with the lowest rainfall) is July (13mm).

  • The average rainfall days in September: 5 days

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

  • The average snowfall in September: 0mm

The month with the highest snowfall is January (149.9mm).
Months with the lowest snowfall are June, July, August and September (0mm).