September weather forecast
Unity, OR

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Weather in September

September, the first month of the autumn in Unity, is also an agreeable month, with an average temperature varying between 47.3°F (8.5°C) and 71.2°F (21.8°C).

Temperature

With September's onset, the weather shows a temperature decrease, transitioning from a warm 81.3°F (27.4°C) in August to an agreeable 71.2°F (21.8°C). Nighttime temperatures exhibit a substantial dip from daytime highs during September, averaging at a frosty 47.3°F (8.5°C).

Humidity

The average relative humidity in September is 47%.

Rainfall

In Unity, in September, during 6.5 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, there are 113.5 rainfall days, and 12.56" (319mm) of precipitation is accumulated.

Snowfall

In Unity, snow does not fall in June through September.

Daylight

The average length of the day in September is 12h and 30min.
On the first day of the month, sunrise is at 6:16 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:34 pm PDT.

Sunshine

The average sunshine in September is 10.7h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the UV index of 4 transforms into the following advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

The high-temperature during September is 71.2°F (21.8°C) and the low-temperature is 47.3°F (8.5°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, in August is appraised at 80.6°F (27°C).

What is the average humidity in September?

The average relative humidity in September is 47%.

How much does it rain in September?

In Unity, in September, it is raining for 6.5 days, with typically 0.43" (11mm) of accumulated precipitation.

When it does not snow?

In Unity, snow does not fall in June through September.

Does it snow in September?

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

What is the average length of the day in September?

The average day length in September is 12h and 30min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:16 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:34 pm PDT.

How long on average sun shines in September?

In September, the average sunshine duration is 10.7h.

How high is the UV index in September?

In Unity, Oregon, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health threat 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
Unity, OR

Average temperature in September - Unity, OR
  • Average high temperature in September: 71.2°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (30.7°F).

  • Average low temperature in September: 47.3°F

The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).

Average pressure in September
Unity, OR

Average pressure in September - Unity, OR
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).

Average wind speed in September
Unity, OR

Average wind speed in September - Unity, OR
  • Average wind speed in September: 5.4mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are September and October (5.4mph).

Average humidity in September
Unity, OR

Average humidity in September - Unity, OR
  • Average humidity in September: 47%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (40%).

Average rainfall in September
Unity, OR

Average rainfall in September - Unity, OR
  • Average rainfall in September: 0.43"

The wettest month (with the highest rainfall) is December (1.77").
The driest month (with the least rainfall) is August (0.31").

Average rainfall days in September
Unity, OR

Average rainfall days in September - Unity, OR
  • Average rainfall days in September: 6.5 days

The month with the highest number of rainy days is March (15.6 days).
The month with the least rainy days is August (4.4 days).

Average snowfall in September
Unity, OR

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

The month with the highest snowfall is December (10.59").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Unity, OR

Average snowfall days in September - Unity, OR
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is December (14.7 days).
The months with the least snowfall days are June, July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in September: 10h and 4min

The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

Average sunshine days in September
Unity, OR

Average sunshine days in September - Unity, OR
  • Average sunshine days in September: 21.4 days

The month with the most sunshine days is July (22.7 days).
The months with the least sunshine days are February and March (11.3 days).

Average UV index in September
Unity, OR

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

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in September
Unity, OR

Average cloud cover in September - Unity, OR
  • Average cloud cover in September: 15

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 9).

Average visibility in September
Unity, OR

Average visibility in September - Unity, OR
  • Average visibility in September: 6mi

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

Unity, Oregon, USA

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