September weather forecast
Apple Valley, CA

Weather in September

September, the first month of the autumn, in Apple Valley, is still a warm month, with average temperature ranging between min 64.4°F (18°C) and max 85.8°F (29.9°C).

Temperature

In Apple Valley, the average high-temperature in September marginally drops, from a tropical 92.1°F (33.4°C) in August, to a warm 85.8°F (29.9°C). The average low-temperature,, is 64.4°F (18°C).

Humidity

In September, the average relative humidity is 30%.

Rainfall

In Apple Valley, during September, the rain falls for 3 days and regularly aggregates up to 0.28" (7mm) of precipitation. Throughout the year, in Apple Valley, there are 46.2 rainfall days, and 4.65" (118mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Apple Valley.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

In September, the average sunshine is 10.6h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Apple Valley?

In September, the average relative humidity in Apple Valley is 30%.

How much does it rain in Apple Valley in September?

In Apple Valley, during September, the rain falls for 3 days and regularly aggregates up to 0.28" (7mm) of precipitation.

When it does not snow in Apple Valley?

In Apple Valley, California, snow does not fall in May through October.

How many hours of daylight does Apple Valley have in September?

In Apple Valley, California, the average length of the day in September is 12.4h.

How many hours of sunshine does Apple Valley have in September?

In Apple Valley, the average sunshine in September is 10.6h.

How high is the UV index in September in Apple Valley?

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
Apple Valley, CA

Average temperature in September - Apple Valley, CA
  • Average high temperature in September: 29.9°C

The warmest month (with the highest average high temperature) is July (33.8°C).
The month with the lowest average high temperature is December (11.8°C).

  • Average low temperature in September: 18°C

The month with the highest average low temperature is August (20.8°C).
The coldest month (with the lowest average low temperature) is December (3.5°C).

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Average pressure in September
Apple Valley, CA

Average pressure in September - Apple Valley, CA
  • Average pressure in September: 1011.2mbar

The month with the highest atmospheric pressure is January (1019.7mbar).
The month with the lowest atmospheric pressure is June (1009.8mbar).

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Average wind speed in September
Apple Valley, CA

Average wind speed in September - Apple Valley, CA
  • Average wind speed in September: 11.8km/h

The windiest month (with the highest average wind speed) is May (16.8km/h).
The calmest month (with the lowest average wind speed) is January (10km/h).

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Average humidity in September
Apple Valley, CA

Average humidity in September - Apple Valley, CA
  • Average humidity in September: 30%

The month with the highest relative humidity is December (51%).
The month with the lowest relative humidity is August (26%).

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Average rainfall in September
Apple Valley, CA

Average rainfall in September - Apple Valley, CA
  • Average rainfall in September: 7mm

The wettest month (with the highest rainfall) is December (22mm).
The driest month (with the least rainfall) is June (1mm).

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Average rainfall days in September
Apple Valley, CA

Average rainfall days in September - Apple Valley, CA
  • Average rainfall days in September: 3 days

The month with the highest number of rainy days is March (5.7 days).
The month with the least rainy days is June (0.8 days).

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Average snowfall in September
Apple Valley, CA

Average snowfall in September - Apple Valley, CA
  • Average snowfall in September: 0mm

The month with the highest snowfall is November (40mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

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Average snowfall days in September
Apple Valley, CA

Average snowfall days in September - Apple Valley, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.3 days).
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
Apple Valley, CA

Average daylight in September / Average sunshine in September - Apple Valley, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 10.6h

Months with the most sunshine are June and July (Average sunshine: 12.1h).
Months with the least sunshine are January and December (Average sunshine: 7.1).

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Average sunshine days in September
Apple Valley, CA

Average sunshine days in September - Apple Valley, CA
  • Average sunshine days in September: 25.9 days

The month with the most sunshine days is June (29 days).
The month with the least sunshine days is February (22.2 days).

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Average UV index in September
Apple Valley, CA

Average UV index in September - Apple Valley, CA
  • Average UV index in September: 6

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
Apple Valley, CA

Average cloud cover in September - Apple Valley, CA
  • Average cloud cover in September: 6

The month with the most cloud cover is December (Cloud cover 20).
The month with the least cloud cover is June (Cloud cover 5).

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Average visibility in September
Apple Valley, CA

Average visibility in September - Apple Valley, CA
  • Average visibility in September: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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