September weather forecast
Junction City, OR

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Weather in September

September, the first month of the autumn in Junction City, is still a warm month, with an average temperature varying between 48.6°F (9.2°C) and 73.6°F (23.1°C).

Temperature

Junction City in September undergoes a slight reduction in the average high-temperature, shifting from August's 81.1°F (27.3°C) to a still moderately hot 73.6°F (23.1°C). Junction City receives a consistent average low-temperature of 48.6°F (9.2°C) in September, a substantial dip from the day's heat.

Humidity

In September, the average relative humidity is 73%.

Rainfall

In Junction City, during September, the rain falls for 8.5 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Junction City, Oregon, during the entire year, the rain falls for 161.8 days and collects up to 28.82" (732mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Junction City, Oregon, the average length of the day in September is 12h and 29min.
On the first day of September, sunrise is at 6:36 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:54 pm PDT.

Sunshine

The average sunshine in September is 9.3h.

UV index

The average daily maximum UV index in September in Junction City, Oregon, is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 4 in September translates into the following instructions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
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Frequently asked questions

What is the temperature in September in Junction City?

In September, in Junction City, the average high-temperature is 73.6°F (23.1°C), and the average low-temperature is 48.6°F (9.2°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is calculated to be 84.2°F (29°C).

What is the average humidity in September in Junction City?

In Junction City, Oregon, the average relative humidity in September is 73%.

How many days does it rain in September in Junction City?

In Junction City, Oregon, during September, the rain falls for 8.5 days and regularly aggregates up to 1.26" (32mm) of precipitation.

When it does not snow in Junction City?

April through October are months without snowfall in Junction City.

What is the average length of the day in September in Junction City?

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

When are sunrise and sunset in September in Junction City?

On the first day of September, sunrise is at 6:36 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:54 pm PDT.

How many hours of sunshine does Junction City have in September?

In September, the average sunshine duration is 9.3h.

How high is the UV index in September in Junction City?

The average daily maximum UV index in September in Junction City is 4. A UV Index value of 3 to 5 symbolizes 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
Junction City, OR

Average temperature in September - Junction City, OR
  • Average high temperature in September: 73.6°F

The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (45.7°F).

  • Average low temperature in September: 48.6°F

The month with the highest average low temperature is August (51.1°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).

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Average pressure in September
Junction City, OR

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

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

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Average wind speed in September
Junction City, OR

Average wind speed in September - Junction City, OR
  • Average wind speed in September: 3.8mph

The windiest month (with the highest average wind speed) is March (4.8mph).
The calmest month (with the lowest average wind speed) is September (3.8mph).

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Average humidity in September
Junction City, OR

Average humidity in September - Junction City, OR
  • Average humidity in September: 73%

The months with the highest relative humidity are January, February, March and December (87%).
The month with the lowest relative humidity is August (68%).

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Average rainfall in September
Junction City, OR

Average rainfall in September - Junction City, OR
  • Average rainfall in September: 1.26"

The wettest month (with the highest rainfall) is December (4.37").
The driest month (with the least rainfall) is July (0.2").

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Average rainfall days in September
Junction City, OR

Average rainfall days in September - Junction City, OR
  • Average rainfall days in September: 8.5 days

The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is August (3.6 days).

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Average snowfall in September
Junction City, OR

Average snowfall in September - Junction City, OR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.81").
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
Junction City, OR

Average snowfall days in September - Junction City, OR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2 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
Junction City, OR

Average daylight in September / Average sunshine in September - Junction City, 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: 9h and 2min

The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).

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Average sunshine days in September
Junction City, OR

Average sunshine days in September - Junction City, OR
  • Average sunshine days in September: 20.5 days

The month with the most sunshine days is July (26.2 days).
The months with the least sunshine days are February and March (9.4 days).

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Average UV index in September
Junction City, OR

Average UV index in September - Junction City, OR
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
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
Junction City, OR

Average cloud cover in September - Junction City, OR
  • Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 22).

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Average visibility in September
Junction City, OR

Average visibility in September - Junction City, OR
  • Average visibility in September: 5mi

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

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Junction City, Oregon, USA

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