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

September weather forecast and climate
La Grande, OR

September, the first month of the autumn, in La Grande, is also a moderately hot month, with average temperature ranging between min 43.9°F (6.6°C) and max 76.5°F (24.7°C).

Temperature

In September, the average high-temperature drops, from a hot 86°F (30°C) in August, to a moderately hot 76.5°F (24.7°C). In September, the average low-temperature is 43.9°F (6.6°C).

Rainfall

In La Grande, during 5 rainfall days, 0.8" (19.3mm) of precipitation is typically accumulated. Throughout the year, there are 101 rainfall days, and 16.8" (426.1mm) of precipitation is accumulated.

Snowfall

In La Grande, in September, it doesn't snow. In October, it regularly snows. In La Grande, during the entire year, snow aggregates up to 19.8" (502.9mm).

Daylight

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

Sunshine

The average sunshine in September is 9h.

UV index

In La Grande, Oregon, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in La Grande?

In September, in La Grande, Oregon, the average high-temperature is 76.5°F (24.7°C), and the average low-temperature is 43.9°F (6.6°C).

How much does it rain in La Grande in September?

In La Grande, Oregon, in September, it is raining for 5 days, with typically 0.8" (19.3mm) of accumulated precipitation.

Does it snow in La Grande in September?

In La Grande, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does La Grande have in September?

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

How many hours of sunshine does La Grande have in September?

In La Grande, the average sunshine in September is 9h.

How high is the UV index in September in La Grande?

In La Grande, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV rays.
Average temperature in September - La Grande, OR
  • Average high temperature in September: 76.5°F

The warmest month (with the highest average high temperature) is August (86°F).
The month with the lowest average high temperature is January (38.1°F).

  • Average low temperature in September: 43.9°F

The month with the highest average low temperature is July (53.5°F).
The coldest month (with the lowest average low temperature) is January (24.2°F).

Average rainfall in September - La Grande, OR
  • Average rainfall in September: 0.8"

The wettest month (with the highest rainfall) is November (2").
The driest month (with the lowest rainfall) is July (0.7").

Average rainfall days in September - La Grande, OR
  • Average rainfall days in September: 5 days

Months with the highest number of rainy days are January, March, November and December (11 days).
Months with the lowest number of rainy days are July and August (4 days).

Average snowfall in September - La Grande, OR
  • Average snowfall in September: 0"

The month with the highest snowfall is January (7").
Months with the lowest snowfall are May, June, July, August and September (0").

Average daylight in September / Average sunshine in September - La Grande, 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: 13h).
The month with least sunshine is December (Average sunshine: 2h).

Average UV index in September - La Grande, OR
  • Average UV index in September: 6

The month with the highest UV index is July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).