September weather forecast
Union Creek, OR

Weather in September

The first month of the autumn, September, is still a pleasant month in Union Creek, Oregon, with an average temperature ranging between max 68.5°F (20.3°C) and min 41.7°F (5.4°C).

Temperature

In September, the average high-temperature marginally drops from a warm 75.7°F (24.3°C) in August to an agreeable 68.5°F (20.3°C). In Union Creek, the average low-temperature is 41.7°F (5.4°C).

Humidity

In Union Creek, the average relative humidity in September is 62%.

Rainfall

In September, in Union Creek, Oregon, the rain falls for 6.4 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. In Union Creek, during the entire year, the rain falls for 91.3 days and collects up to 32.95" (837mm) of precipitation.

Snowfall

Months with snowfall in Union Creek are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 2 snowfall days, it receives 1.61" (41mm) of snow. In Union Creek, during the entire year, snow falls for 133.6 days and aggregates up to 201.38" (5115mm) of snow.

Daylight

In Union Creek, the average length of the day in September is 12h and 29min.
On the first day of September in Union Creek, Oregon, sunrise is at 6:34 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:53 pm PDT.

Sunshine

In September, the average sunshine in Union Creek is 10.5h.

UV index

The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in September in Union Creek?

The average high-temperature, in September, in Union Creek, Oregon, is 68.5°F (20.3°C), while the average low-temperature is 41.7°F (5.4°C).

What is the average humidity in September in Union Creek?

In Union Creek, the average relative humidity in September is 62%.

How many days does it rain in September in Union Creek?

In September, in Union Creek, Oregon, the rain falls for 6.4 days. Throughout September, 0.98" (25mm) of precipitation is accumulated.

When does it start to snow in Union Creek?

September is the first month it typically snows in Union Creek, Oregon. Throughout September, in the average 2 snowfall days, it receives 1.61" (41mm) of snow.

How many hours of daylight does Union Creek have in September?

In September, the average day length is 12h and 29min.

What time are sunrise and sunset in September in Union Creek?

In September, on the first day of the month, sunrise is at 6:34 am and sunset at 7:45 pm. On the last day of the month, in Union Creek, Oregon, sunrise is at 7:06 am and sunset at 6:53 pm PDT.

How many hours of sunshine does Union Creek have in September?

In Union Creek, the average sunshine duration in September is 10.5h.

How high is the UV index in September in Union Creek?

In Union Creek, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Union Creek, OR

Average temperature in September - Union Creek, OR
  • Average high temperature in September: 68.5°F

The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is December (34.9°F).

  • Average low temperature in September: 41.7°F

The month with the highest average low temperature is August (46.8°F).
The coldest month (with the lowest average low temperature) is December (22.6°F).

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Average pressure in September
Union Creek, OR

Average pressure in September - Union Creek, OR
  • Average pressure in September: 30"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).

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Average wind speed in September
Union Creek, OR

Average wind speed in September - Union Creek, OR
  • Average wind speed in September: 4.7mph

The windiest months (with the highest average wind speed) are January, February and March (6mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in September
Union Creek, OR

Average humidity in September - Union Creek, OR
  • Average humidity in September: 62%

The months with the highest relative humidity are January, February and March (87%).
The months with the lowest relative humidity are July and August (57%).

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Average rainfall in September
Union Creek, OR

Average rainfall in September - Union Creek, OR
  • Average rainfall in September: 0.98"

The wettest month (with the highest rainfall) is January (5.28").
The driest month (with the least rainfall) is July (0.39").

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Average rainfall days in September
Union Creek, OR

Average rainfall days in September - Union Creek, OR
  • Average rainfall days in September: 6.4 days

The month with the highest number of rainy days is May (13.3 days).
The month with the least rainy days is February (4.3 days).

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Average snowfall in September
Union Creek, OR

Average snowfall in September - Union Creek, OR
  • Average snowfall in September: 1.61"

The month with the highest snowfall is December (39.72").
The months with the least snowfall are July and August (0").

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Average snowfall days in September
Union Creek, OR

Average snowfall days in September - Union Creek, OR
  • Average snowfall days in September: 2 days

The month with the highest number of snowfall days is March (21.5 days).
The month with the least snowfall days is August (0 days).

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Average daylight in September /
Average sunshine in September
Union Creek, OR

Average daylight in September / Average sunshine in September - Union Creek, OR
  • Average daylight in September: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 5min).

  • Average sunshine in September: 10h and 30min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).

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Average sunshine days in September
Union Creek, OR

Average sunshine days in September - Union Creek, OR
  • Average sunshine days in September: 21.1 days

The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is March (8.3 days).

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Average UV index in September
Union Creek, OR

Average UV index in September - Union Creek, OR
  • Average UV index in September: 3

The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in September
Union Creek, OR

Average cloud cover in September - Union Creek, OR
  • Average cloud cover in September: 22

The month with the most cloud cover is March (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 13).

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Average visibility in September
Union Creek, OR

Average visibility in September - Union Creek, OR
  • Average visibility in September: 6mi

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

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