September weather forecast
Elkhorn, CA

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Weather in September

September, the first month of the autumn in Elkhorn, is also a moderately hot month, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 54.5°F (12.5°C).

Temperature

The shift into September uncovers an average high-temperature of a still moderately hot 76.5°F (24.7°C), subtly different from the previous month. A pronounced dip becomes evident during the nights in September as Elkhorn logs a consistent average temperature of 54.5°F (12.5°C).

Humidity

The average relative humidity in September is 67%.

Rainfall

June through September are months with the least rain in Elkhorn when the rain falls for 2.1 days and typically aggregates up to 0.04" (1mm) of rain.

Daylight

In September, the average length of the day is 12h and 24min.
On the first day of the month, sunrise is at 6:38 am and sunset at 7:34 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:51 pm PDT.

Sunshine

In Elkhorn, the average sunshine in September is 11.2h.

UV index

The months with the highest UV index are June through September, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 5 in September translates into the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Updated: Jul 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

In September, the average high-temperature and low-temperature are 76.5°F (24.7°C) and 54.5°F (12.5°C) respectively.

What is the average humidity in September?

The average relative humidity in September is 67%.

What is the driest month?

June through September are months with the least rain when the rain falls for 2.1 days and typically aggregates up to 0.04" (1mm) of rain.

How many days does it rain in September?

In Elkhorn, in September, it is raining for 2.1 days, with typically 0.04" (1mm) of accumulated precipitation.

How many hours of daylight does Elkhorn have in September?

In Elkhorn, the average day length in September is 12h and 24min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:38 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm PDT.

How long on average sun shines in September?

The average sunshine duration in September is 11.2h.

What is the month with the highest UV index?

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

What is the UV index reading in September?

In Elkhorn, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Elkhorn, CA

Average temperature in September - Elkhorn, CA
  • Average high temperature in September: 76.5°F

The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (57.6°F).

  • Average low temperature in September: 54.5°F

The month with the highest average low temperature is September (54.5°F).
The coldest month (with the lowest average low temperature) is December (43.7°F).

Average pressure in September
Elkhorn, CA

Average pressure in September - Elkhorn, 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).

Average wind speed in September
Elkhorn, CA

Average wind speed in September - Elkhorn, CA
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is May (6.5mph).
The calmest month (with the lowest average wind speed) is September (4.9mph).

Average humidity in September
Elkhorn, CA

Average humidity in September - Elkhorn, CA
  • Average humidity in September: 67%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (66%).

Average rainfall in September
Elkhorn, CA

Average rainfall in September - Elkhorn, CA
  • Average rainfall in September: 0.04"

The wettest month (with the highest rainfall) is December (1.14").
The driest months (with the least rainfall) are June, July, August and September (0.04").

Average rainfall days in September
Elkhorn, CA

Average rainfall days in September - Elkhorn, CA
  • Average rainfall days in September: 2.1 days

The month with the highest number of rainy days is March (10.2 days).
The month with the least rainy days is August (0.7 days).

Average daylight in September /
Average sunshine in September
Elkhorn, CA

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

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 11h and 1min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

Average sunshine days in September
Elkhorn, CA

Average sunshine days in September - Elkhorn, CA
  • Average sunshine days in September: 27.3 days

The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (20 days).

Average UV index in September
Elkhorn, CA

Average UV index in September - Elkhorn, CA
  • Average UV index in September: 5

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

Average cloud cover in September
Elkhorn, CA

Average cloud cover in September - Elkhorn, CA
  • Average cloud cover in September: 10

The month with the most cloud cover is March (Cloud cover 33).
The months with the least cloud cover are July and September (Cloud cover 10).

Average visibility in September
Elkhorn, CA

Average visibility in September - Elkhorn, 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).

Elkhorn, California, USA

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