September weather forecast
Mount Hermon, CA

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Weather in September

September, the first month of the autumn in Mount Hermon, is also a moderately hot month, with an average temperature varying between 55.4°F (13°C) and 74.5°F (23.6°C).

Temperature

Mount Hermon's average high-temperature in September is a still warm 74.5°F (23.6°C), marking an insignificant difference from the 74.8°F (23.8°C) of August. Mount Hermon's temperature drops to an average low of 55.4°F (13°C) during the nights of September.

Humidity

In September, the average relative humidity is 69%.

Rainfall

In Mount Hermon, in September, during 2.9 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. Throughout the year, there are 72.5 rainfall days, and 13.58" (345mm) of precipitation is accumulated.

Daylight

In Mount Hermon, the average length of the day in September is 12h and 24min.
On the first day of the month, sunrise is at 6:39 am and sunset at 7:36 pm. On the last day of September, in Mount Hermon, sunrise is at 7:03 am and sunset at 6:52 pm PDT.

Sunshine

The average sunshine in September is 10.9h.

UV index

June through October, with an average maximum UV index of 5, are months with the highest UV index in Mount Hermon. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: An average maximum UV index of 5 in September leads to these recommendations:
Exercise prevention - Precautions against solar damage are endorsed. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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Frequently asked questions

What is the average September temperature in Mount Hermon?

An average high-temperature, in September, in Mount Hermon, is 74.5°F (23.6°C) and the average low-temperature is 55.4°F (13°C).

What is the average humidity in September in Mount Hermon?

In September, the average relative humidity in Mount Hermon, California, is 69%.

How much does it rain in Mount Hermon in September?

In Mount Hermon, California, during September, the rain falls for 2.9 days and regularly aggregates up to 0.12" (3mm) of precipitation.

How many hours of daylight does Mount Hermon have in September?

In Mount Hermon, California, the average day length in September is 12h and 24min.

When is the sunrise / sunset in September in Mount Hermon?

In September, on the first day of the month, sunrise is at 6:39 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:52 pm PDT.

How many hours of sunshine does Mount Hermon have in September?

The average sunshine duration in September in Mount Hermon is 10.9h.

What is the month with the highest UV index in Mount Hermon?

The months with the highest UV index are June through October, with an average maximum UV index of 5.

What is the UV index reading in September in Mount Hermon?

In September, the average daily maximum UV index in Mount Hermon is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Mount Hermon, CA

Average temperature in September - Mount Hermon, CA
  • Average high temperature in September: 74.5°F

The warmest month (with the highest average high temperature) is August (74.8°F).
The month with the lowest average high temperature is December (57°F).

  • Average low temperature in September: 55.4°F

The month with the highest average low temperature is September (55.4°F).
The coldest month (with the lowest average low temperature) is February (45.1°F).

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Average pressure in September
Mount Hermon, CA

Average pressure in September - Mount Hermon, CA
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).

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Average wind speed in September
Mount Hermon, CA

Average wind speed in September - Mount Hermon, CA
  • Average wind speed in September: 5.4mph

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in September
Mount Hermon, CA

Average humidity in September - Mount Hermon, CA
  • Average humidity in September: 69%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (67%).

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Average rainfall in September
Mount Hermon, CA

Average rainfall in September - Mount Hermon, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is February (2.6").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in September
Mount Hermon, CA

Average rainfall days in September - Mount Hermon, CA
  • Average rainfall days in September: 2.9 days

The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (0.8 days).

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Average daylight in September /
Average sunshine in September
Mount Hermon, CA

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

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 10h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

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Average sunshine days in September
Mount Hermon, CA

Average sunshine days in September - Mount Hermon, CA
  • Average sunshine days in September: 26 days

The month with the most sunshine days is August (28.9 days).
The month with the least sunshine days is March (17.5 days).

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Average UV index in September
Mount Hermon, CA

Average UV index in September - Mount Hermon, CA
  • Average UV index in September: 5

The months with the highest UV index are June, July, August, September and October (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).

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Average cloud cover in September
Mount Hermon, CA

Average cloud cover in September - Mount Hermon, CA
  • Average cloud cover in September: 14

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 12).

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Average visibility in September
Mount Hermon, CA

Average visibility in September - Mount Hermon, CA
  • Average visibility in September: 6mi

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

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Mount Hermon, California, USA

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