September weather forecast
Junction City, CA

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Junction City, California, with an average temperature fluctuating between 46.2°F (7.9°C) and 77.9°F (25.5°C).

Temperature

September signifies a gentle decline in Junction City's average high-temperature, easing from a moderately hot 84.6°F (29.2°C) in August to a still warm 77.9°F (25.5°C). A marked drop from daytime peak temperatures to an average low-temperature of 46.2°F (7.9°C) is observed during the nights in September in Junction City, California.

Humidity

In September, the average relative humidity in Junction City, California, is 57%.

Rainfall

In Junction City, during September, the rain falls for 3.6 days and regularly aggregates up to 0.47" (12mm) of precipitation. Throughout the year, in Junction City, there are 119.2 rainfall days, and 33.35" (847mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Junction City.

Daylight

The average length of the day in September in Junction City is 12h and 27min.
On the first day of September in Junction City, sunrise is at 6:40 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:55 pm PDT.

Sunshine

In Junction City, California, the average sunshine in September is 10.7h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 4 during September translates into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
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Frequently asked questions

What are September temperatures in Junction City?

September temperatures in Junction City, California, vary between a high-temperature of 77.9°F (25.5°C) and a low-temperature of 46.2°F (7.9°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, is computed to be 86°F (30°C).

What is the average humidity in September in Junction City?

The average relative humidity in September in Junction City is 57%.

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

In September, in Junction City, the rain falls for 3.6 days. Throughout September, 0.47" (12mm) of precipitation is accumulated.

When it does not snow in Junction City?

May through October are months without snowfall in Junction City, California.

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

In Junction City, California, the average day length in September is 12h and 27min.

When is the sunrise / sunset in September in Junction City?

On the first day of September in Junction City, California, sunrise is at 6:40 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:55 pm PDT.

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

In Junction City, California, the average sunshine duration in September is 10.7h.

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

In September, the average daily maximum UV index in Junction City, California, is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
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, CA

Average temperature in September - Junction City, CA
  • Average high temperature in September: 77.9°F

The warmest months (with the highest average high temperature) are July and August (84.6°F).
The month with the lowest average high temperature is December (45°F).

  • Average low temperature in September: 46.2°F

The month with the highest average low temperature is July (51.3°F).
The coldest month (with the lowest average low temperature) is December (30°F).

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Average pressure in September
Junction City, CA

Average pressure in September - Junction City, CA
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).

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Average wind speed in September
Junction City, CA

Average wind speed in September - Junction City, CA
  • Average wind speed in September: 3.7mph

The windiest months (with the highest average wind speed) are March and April (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).

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Average humidity in September
Junction City, CA

Average humidity in September - Junction City, CA
  • Average humidity in September: 57%

The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is August (54%).

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Average rainfall in September
Junction City, CA

Average rainfall in September - Junction City, CA
  • Average rainfall in September: 0.47"

The wettest month (with the highest rainfall) is December (6.14").
The driest months (with the least rainfall) are July and August (0.16").

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Average rainfall days in September
Junction City, CA

Average rainfall days in September - Junction City, CA
  • Average rainfall days in September: 3.6 days

The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is August (2.5 days).

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Average snowfall in September
Junction City, CA

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

The month with the highest snowfall is February (8.35").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Junction City, CA

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

The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Junction City, CA

Average daylight in September / Average sunshine in September - Junction City, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in September: 10h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

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Average sunshine days in September
Junction City, CA

Average sunshine days in September - Junction City, CA
  • Average sunshine days in September: 24.8 days

The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is March (10.6 days).

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Average UV index in September
Junction City, CA

Average UV index in September - Junction City, CA
  • 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, CA

Average cloud cover in September - Junction City, CA
  • Average cloud cover in September: 16

The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 8).

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Average visibility in September
Junction City, CA

Average visibility in September - Junction City, CA
  • Average visibility in September: 6mi

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

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Junction City, California, USA

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