September weather forecast
Hood River, OR

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A red barn house in a farm field among scenic trees at the foot of a mountain with snowy peaks in Hood River, Oregon
A red barn house in a farm field among scenic trees at the foot of a mountain with snowy peaks in Hood River, Oregon

Weather in September

September marks the beginning of autumn in Hood River. It introduces a significant change in the weather pattern with temperatures beginning to drop. The autumn foliage around Hood River becomes more evident as the month proceeds. Relative humidity increases as the cooler weather begins to set in. The rainfall increases from 0.39" (10mm) in August to 1.14" (29mm) marking the onset of wetter months.

Temperature

September brings a minor decrease, with the average high-temperature reducing from a moderately hot 78.4°F (25.8°C) in August to a pleasant 68.9°F (20.5°C). Despite the intense daytime heat, Hood River sustains a steady low-temperature average of 47.1°F (8.4°C) during September.

Humidity

The average relative humidity in September is 66%.

Rainfall

In September, the rain falls for 9.2 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. In Hood River, during the entire year, the rain falls for 159.7 days and collects up to 31.42" (798mm) of precipitation.

Snowfall

In Hood River, snow does not fall in April through October.

Daylight

In Hood River, the average length of the day in September is 12h and 31min.
On the first day of September, sunrise is at 6:28 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:47 pm PDT.

Sunshine

In September, the average sunshine is 9.9h.

UV index

In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: An average UV index of 3 in September transforms into this advice:
Exercise care. People with light skin might get burns in fewer than 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Enhance your sun protection with tightly woven, yet airy clothing.

Frequently asked questions

What are the temperatures in September?

The average high-temperature and low-temperature during September are 68.9°F (20.5°C) and 47.1°F (8.4°C) respectively.

What is the average humidity in September?

In Hood River, the average relative humidity in September is 66%.

How many days does it rain in September?

In Hood River, during September, the rain falls for 9.2 days and regularly aggregates up to 1.14" (29mm) of precipitation.

When it does not snow?

April through October are months without snowfall.

What is the average length of the day in September?

In September, the average day length in Hood River is 12h and 31min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:28 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:47 pm PDT.

How long on average sun shines in September?

The average sunshine duration in September is 9.9h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Hood River, OR

Average temperature in September - Hood River, OR
  • Average high temperature in September: 68.9°F

The warmest month (with the highest average high temperature) is August (78.4°F).
The month with the lowest average high temperature is December (36°F).

  • Average low temperature in September: 47.1°F

The month with the highest average low temperature is August (51.4°F).
The coldest month (with the lowest average low temperature) is December (27°F).

Average pressure in September
Hood River, OR

Average pressure in September - Hood River, OR
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).

Average wind speed in September
Hood River, OR

Average wind speed in September - Hood River, OR
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is June (6.1mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).

Average humidity in September
Hood River, OR

Average humidity in September - Hood River, OR
  • Average humidity in September: 66%

The months with the highest relative humidity are February and December (88%).
The month with the lowest relative humidity is July (59%).

Average rainfall in September
Hood River, OR

Average rainfall in September - Hood River, OR
  • Average rainfall in September: 1.14"

The wettest month (with the highest rainfall) is January (5.67").
The driest month (with the least rainfall) is July (0.28").

Average rainfall days in September
Hood River, OR

Average rainfall days in September - Hood River, OR
  • Average rainfall days in September: 9.2 days

The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is August (4.2 days).

Average snowfall in September
Hood River, OR

Average snowfall in September - Hood River, OR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (4.76").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Hood River, OR

Average snowfall days in September - Hood River, OR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (4.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Hood River, OR

Average daylight in September / Average sunshine in September - Hood River, OR
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in September: 9h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in September
Hood River, OR

Average sunshine days in September - Hood River, OR
  • Average sunshine days in September: 18.7 days

The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (8.4 days).

Average UV index in September
Hood River, OR

Average UV index in September - Hood River, OR
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).

Average cloud cover in September
Hood River, OR

Average cloud cover in September - Hood River, OR
  • Average cloud cover in September: 29

The months with the most cloud cover are January and February (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 17).

Average visibility in September
Hood River, OR

Average visibility in September - Hood River, OR
  • Average visibility in September: 6mi

The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (4mi).

Hood River, Oregon, USA

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