September weather forecast
Valley Wells, CA

Weather in September

The first month of the autumn, September, is still a hot month in Valley Wells, California, with average temperature fluctuating between 86.5°F (30.3°C) and 65.5°F (18.6°C).

Temperature

In Valley Wells, the average high-temperature in September marginally drops, from a hot 93.7°F (34.3°C) in August, to a still tropical 86.5°F (30.3°C). In Valley Wells, the average low-temperature is 65.5°F (18.6°C).

Humidity

The average relative humidity in Valley Wells, California, is 23%.

Rainfall

In Valley Wells, during September, the rain falls for 2.1 days and regularly aggregates up to 0.16" (4mm) of precipitation. Throughout the year, there are 34.1 rainfall days, and 2.64" (67mm) of precipitation is accumulated.

Snowfall

In Valley Wells, California, snow does not fall in February through October and December.

Daylight

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

Sunshine

In September, the average sunshine in Valley Wells is 10.8h.

UV index

The average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 in September 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in September in Valley Wells?

In September, the average relative humidity is 23%.

How much does it rain in Valley Wells in September?

In September, in Valley Wells, California, the rain falls for 2.1 days. Throughout September, 0.16" (4mm) of precipitation is accumulated.

When it does not snow in Valley Wells?

February through October and December are months without snowfall in Valley Wells, California.

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

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

How long on average sun shines in September in Valley Wells?

In September, the average sunshine in Valley Wells is 10.8h.

What is the UV index reading in September in Valley Wells?

In Valley Wells, California, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Valley Wells, CA

Average temperature in September - Valley Wells, CA
  • Average high temperature in September: 86.5°F

The warmest month (with the highest average high temperature) is July (95°F).
The month with the lowest average high temperature is December (52°F).

  • Average low temperature in September: 65.5°F

The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is December (37°F).

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Average pressure in September
Valley Wells, CA

Average pressure in September - Valley Wells, CA
  • Average pressure in September: 29.87"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.82").

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Average wind speed in September
Valley Wells, CA

Average wind speed in September - Valley Wells, CA
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is May (9.1mph).
The calmest month (with the lowest average wind speed) is January (5.7mph).

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Average humidity in September
Valley Wells, CA

Average humidity in September - Valley Wells, CA
  • Average humidity in September: 23%

Months with the highest relative humidity are January and December (47%).
The month with the lowest relative humidity is August (20%).

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Average rainfall in September
Valley Wells, CA

Average rainfall in September - Valley Wells, CA
  • Average rainfall in September: 0.16"

The wettest month (with the highest rainfall) is January (0.35").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in September
Valley Wells, CA

Average rainfall days in September - Valley Wells, CA
  • Average rainfall days in September: 2.1 days

The month with the highest number of rainy days is March (4.3 days).
The month with the least rainy days is June (1.3 days).

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Average snowfall in September
Valley Wells, CA

Average snowfall in September - Valley Wells, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is November (0.16").
Months with the least snowfall are February, March, April, May, June, July, August, September, October and December (0").

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Average snowfall days in September
Valley Wells, CA

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

The month with the highest number of snowfall days is January (0.3 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Valley Wells, CA

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

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 10.8h

The month with the most sunshine is June (Average sunshine: 12.2h).
Months with the least sunshine are January and December (Average sunshine: 7.1).

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Average sunshine days in September
Valley Wells, CA

Average sunshine days in September - Valley Wells, CA
  • Average sunshine days in September: 26 days

The month with the most sunshine days is December (28.1 days).
The month with the least sunshine days is July (23.6 days).

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Average UV index in September
Valley Wells, CA

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

The month with the highest UV index is July (UV index 8).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
Valley Wells, CA

Average cloud cover in September - Valley Wells, CA
  • Average cloud cover in September: 5

Months with the most cloud cover are January, March and December (Cloud cover 17).
Months with the least cloud cover are June, August and September (Cloud cover 5).

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Average visibility in September
Valley Wells, CA

Average visibility in September - Valley Wells, CA
  • Average visibility in September: 6mi

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

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