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

September weather forecast and climate
The Dalles, OR

The first month of the autumn, September, is also a moderately hot month in The Dalles, Oregon, with temperature in the range of an average low of 52°F (11.1°C) and an average high of 81°F (27.2°C).

Temperature

In The Dalles, the average high-temperature in September slightly decreases, from a hot 88°F (31.1°C) in August, to a warm 81°F (27.2°C). In The Dalles, Oregon, the average low-temperature is 52°F (11.1°C).

Rainfall

In The Dalles, during September, the rain falls for 5 days and regularly aggregates up to 0.5" (12.7mm) of precipitation. In The Dalles, during the entire year, the rain falls for 105 days and collects up to 14.2" (360.7mm) of precipitation.

Daylight

The average length of the day is 12.5h.

Sunshine

In September, the average sunshine in The Dalles is 9h.

UV index

In The Dalles, Oregon, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in The Dalles?

In The Dalles, Oregon, in September, the average high-temperature is 81°F (27.2°C), and the average low-temperature is 52°F (11.1°C).

How many days does it rain in September in The Dalles?

In The Dalles, Oregon, in September, during 5 rainfall days, 0.5" (12.7mm) of precipitation is typically accumulated.

What is the average length of the day in September in The Dalles?

The average length of the day in September is 12.5h.

How many hours of sunshine does The Dalles have in September?

The average sunshine in September in The Dalles, Oregon, is 9h.

What is the UV index intensity in September in The Dalles?

In September, the average daily maximum UV index in The Dalles is 5. A UV Index estimate of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.
Average temperature in September - The Dalles, OR
  • Average high temperature in September: 81°F

Warmest months (with the highest average high temperature) are July and August (88°F).
The month with the lowest average high temperature is January (41°F).

  • Average low temperature in September: 52°F

Months with the highest average low temperature are July and August (61°F).
Coldest months (with the lowest average low temperature) are January and December (30°F).

Average rainfall in September - The Dalles, OR
  • Average rainfall in September: 0.5"

Wettest months (with the highest rainfall) are January and December (2.6").
The driest month (with the lowest rainfall) is July (0.2").

Average rainfall days in September - The Dalles, OR
  • Average rainfall days in September: 5 days

The month with the highest number of rainy days is December (14 days).
The month with the lowest number of rainy days is July (3 days).

Average daylight in September / Average sunshine in September - The Dalles, 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).

  • Average sunshine in September: 9h

The month with most sunshine is July (Average sunshine: 12h).
The month with least sunshine is December (Average sunshine: 2h).

Average UV index in September - The Dalles, OR
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).