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

September weather forecast and climate
Umatilla, OR

The first month of the autumn, September, is still a warm month in Umatilla, Oregon, with average temperature fluctuating between 80.8°F (27.1°C) and 48.9°F (9.4°C).

Temperature

In Umatilla, the average high-temperature drops, from a tropical 90.5°F (32.5°C) in August, to a warm 80.8°F (27.1°C). The average low-temperature, in September, is 48.9°F (9.4°C).

Rainfall

In Umatilla, it is raining for 3 days, with typically 0.4" (11.4mm) of accumulated precipitation. Throughout the year, there are 60 rainfall days, and 8" (203.8mm) of precipitation is accumulated.

Snowfall

In Umatilla, Oregon, snow does not fall in April through October.

Daylight

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

What is the temperature in September in Umatilla?

In September, in Umatilla, the average high-temperature is 80.8°F (27.1°C), and the average low-temperature is 48.9°F (9.4°C).

How many days does it rain in September in Umatilla?

In September, in Umatilla, the rain falls for 3 days. Throughout September, 0.4" (11.4mm) of precipitation is accumulated.

When it does not snow in Umatilla?

April through October are months without snowfall in Umatilla.

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

The average length of the day in September in Umatilla, Oregon, is 12.5h.
Average temperature in September - Umatilla, OR
  • Average high temperature in September: 80.7°F

The warmest month (with the highest average high temperature) is July (92.6°F).
The month with the lowest average high temperature is January (40°F).

  • Average low temperature in September: 48.9°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

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

Wettest months (with the highest rainfall) are January, November and December (1.1").
The driest month (with the lowest rainfall) is July (0.2").

Average rainfall days in September - Umatilla, OR
  • Average rainfall days in September: 3 days

Months with the highest number of rainy days are January and December (8 days).
The month with the lowest number of rainy days is July (1 days).

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

The month with the highest snowfall is January (3.9").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

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

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).