September weather forecast
Willamina, OR

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Weather in September

September, the first month of the autumn in Willamina, is still a pleasant month, with temperature in the range of an average high of 71.1°F (21.7°C) and an average low of 48.7°F (9.3°C).

Temperature

September signifies a minor drop in average high-temperature, transitioning from a moderately hot 78.4°F (25.8°C) in August to an agreeable 71.1°F (21.7°C). The temperature notes a substantial fall from the daily peak to an average of 48.7°F (9.3°C) during September nights.

Humidity

The average relative humidity in September in Willamina, Oregon, is 76%.

Rainfall

In Willamina, in September, it is raining for 9.5 days, with typically 0.67" (17mm) of accumulated precipitation. In Willamina, during the entire year, the rain falls for 156 days and collects up to 15.94" (405mm) of precipitation.

Snowfall

April through October are months without snowfall in Willamina.

Daylight

In Willamina, Oregon, the average length of the day in September is 12h and 31min.
On the first day of September in Willamina, sunrise is at 6:36 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:55 pm PDT.

Sunshine

In Willamina, the average sunshine in September is 8.7h.

UV index

In Willamina, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum UV index of 4 in September translates into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
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Frequently asked questions

What are the temperatures in Willamina in September?

The high-temperature, in September, in Willamina, is 71.1°F (21.7°C), while the low-temperature averages to 48.7°F (9.3°C).

What is the average humidity in September in Willamina?

In September, the average relative humidity in Willamina, Oregon, is 76%.

How much does it rain in Willamina in September?

In Willamina, Oregon, in September, during 9.5 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

When it does not snow in Willamina?

In Willamina, snow does not fall in April through October.

How many hours of daylight does Willamina have in September?

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

When is the sunrise / sunset in September in Willamina?

On the first day of September in Willamina, Oregon, sunrise is at 6:36 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:55 pm PDT.

How many hours of sunshine does Willamina have in September?

In September, the average sunshine duration in Willamina, Oregon, is 8.7h.

What is the UV index reading in September in Willamina?

In Willamina, Oregon, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from 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
Willamina, OR

Average temperature in September - Willamina, OR
  • Average high temperature in September: 71.1°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 (43.5°F).

  • Average low temperature in September: 48.7°F

The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is December (33.3°F).

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Average pressure in September
Willamina, OR

Average pressure in September - Willamina, OR
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is September (30.01"Hg).

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Average wind speed in September
Willamina, OR

Average wind speed in September - Willamina, OR
  • Average wind speed in September: 3.9mph

The windiest month (with the highest average wind speed) is March (5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).

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Average humidity in September
Willamina, OR

Average humidity in September - Willamina, OR
  • Average humidity in September: 76%

The months with the highest relative humidity are February and December (89%).
The month with the lowest relative humidity is August (71%).

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Average rainfall in September
Willamina, OR

Average rainfall in September - Willamina, OR
  • Average rainfall in September: 0.67"

The wettest month (with the highest rainfall) is December (2.56").
The driest month (with the least rainfall) is July (0.24").

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Average rainfall days in September
Willamina, OR

Average rainfall days in September - Willamina, OR
  • Average rainfall days in September: 9.5 days

The month with the highest number of rainy days is March (18.9 days).
The month with the least rainy days is August (4.8 days).

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Average snowfall in September
Willamina, OR

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

The month with the highest snowfall is February (0.94").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Willamina, OR

Average snowfall days in September - Willamina, OR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Willamina, OR

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

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).

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Average sunshine days in September
Willamina, OR

Average sunshine days in September - Willamina, OR
  • Average sunshine days in September: 18 days

The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is February (9.3 days).

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Average UV index in September
Willamina, OR

Average UV index in September - Willamina, OR
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Willamina, OR

Average cloud cover in September - Willamina, OR
  • Average cloud cover in September: 39

The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in September
Willamina, OR

Average visibility in September - Willamina, OR
  • Average visibility in September: 5mi

The months with the highest visibility are June, July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (4mi).

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Willamina, Oregon, USA

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