September weather forecast
Yermo, CA

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Weather in September

The first month of the autumn, September, is still a hot month in Yermo, California, with an average temperature varying between 89.8°F (32.1°C) and 69.1°F (20.6°C).

Temperature

The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a very hot 97.3°F (36.3°C) in August to a tropical 89.8°F (32.1°C). In Yermo, September is marked by an average low-temperature of 69.1°F (20.6°C).

Humidity

In Yermo, the average relative humidity in September is 25%.

Rainfall

In Yermo, in September, it is raining for 2.8 days, with typically 0.16" (4mm) of accumulated precipitation. In Yermo, during the entire year, the rain falls for 39 days and collects up to 3.27" (83mm) of precipitation.

Snowfall

February through December are months without snowfall.

Daylight

In Yermo, the average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:20 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:32 pm PDT.

Sunshine

The average sunshine in September is 10.6h.

UV index

The average daily maximum UV index in September in Yermo is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 6 during September leads to these advisories:
Guard oneself from overexposure. Defence against sun injury is vital. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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Frequently asked questions

How hot does it get in Yermo in September?

September temperatures vary between a high-temperature of 89.8°F (32.1°C) and a low-temperature of 69.1°F (20.6°C).

What is the average humidity in September in Yermo?

In Yermo, the average relative humidity in September is 25%.

How much does it rain in Yermo in September?

In September, in Yermo, the rain falls for 2.8 days. Throughout September, 0.16" (4mm) of precipitation is accumulated.

When it does not snow in Yermo?

February through December are months without snowfall in Yermo.

What is the average length of the day in September in Yermo?

In September, the average day length in Yermo is 12h and 23min.

When are sunrise and sunset in September in Yermo?

On the first day of September in Yermo, California, sunrise is at 6:20 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:32 pm PDT.

How long on average sun shines in September in Yermo?

The average sunshine duration in September in Yermo, California, is 10.6h.

What is the UV index intensity in September in Yermo?

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to 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
Yermo, CA

Average temperature in September - Yermo, CA
  • Average high temperature in September: 89.8°F

The warmest month (with the highest average high temperature) is July (98.2°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in September: 69.1°F

The month with the highest average low temperature is August (74.7°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).

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Average pressure in September
Yermo, CA

Average pressure in September - Yermo, CA
  • Average pressure in September: 29.85"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.79"Hg).

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Average wind speed in September
Yermo, CA

Average wind speed in September - Yermo, CA
  • Average wind speed in September: 8mph

The windiest month (with the highest average wind speed) is May (11.7mph).
The calmest month (with the lowest average wind speed) is January (6mph).

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Average humidity in September
Yermo, CA

Average humidity in September - Yermo, CA
  • Average humidity in September: 25%

The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is August (21%).

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Average rainfall in September
Yermo, CA

Average rainfall in September - Yermo, CA
  • Average rainfall in September: 0.16"

The wettest month (with the highest rainfall) is December (0.51").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in September
Yermo, CA

Average rainfall days in September - Yermo, CA
  • Average rainfall days in September: 2.8 days

The month with the highest number of rainy days is December (4.6 days).
The month with the least rainy days is June (0.6 days).

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Average snowfall in September
Yermo, CA

Average snowfall in September - Yermo, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
Yermo, CA

Average snowfall days in September - Yermo, CA
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and December (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 10h and 4min

The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 7h and 6min).

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Average sunshine days in September
Yermo, CA

Average sunshine days in September - Yermo, CA
  • Average sunshine days in September: 26 days

The month with the most sunshine days is June (29 days).
The month with the least sunshine days is February (23.5 days).

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Average UV index in September
Yermo, CA

Average UV index in September - Yermo, CA
  • Average UV index in September: 6

The months with the highest UV index are June and July (UV index 8).
The months with the lowest UV index are November and December (UV index 3).

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Average cloud cover in September
Yermo, CA

Average cloud cover in September - Yermo, CA
  • Average cloud cover in September: 5

The month with the most cloud cover is December (Cloud cover 18).
The month with the least cloud cover is June (Cloud cover 4).

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Average visibility in September
Yermo, CA

Average visibility in September - Yermo, 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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Yermo, California, USA

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