September weather forecast and climate
Mount Baldy, CA

Weather in September

The first month of the autumn, September, is also a moderately hot month in Mount Baldy, California, with average temperature varying between 62.6°F (17°C) and 85.6°F (29.8°C).

Temperature

In Mount Baldy, the average high-temperature is practically the same as in August - a moderately hot 85.6°F (29.8°C). In September, the average low-temperature is 62.6°F (17°C).

Heat index

The average heat index in September is calculated to 85.6°F (29.8°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, clothing, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In September, the average relative humidity in Mount Baldy is 43%.

Rainfall

Months with rainfall in Mount Baldy are January through June, September through December. September is the first month it rains in Mount Baldy, California. Throughout September, in the average 1.5 rainfall days, it receives 0.04" (1mm) of precipitation. Throughout the year, in Mount Baldy, there are 28.4 rainfall days, and 3.86" (98mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall in Mount Baldy.

Daylight

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

Sunshine

In Mount Baldy, California, the average sunshine is 10.8h.

UV index

In September, the average daily maximum UV index in Mount Baldy is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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 temperature in September in Mount Baldy?

In September, the average high-temperature is 85.6°F (29.8°C), and the average low-temperature is 62.6°F (17°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), that combines both air temperature and relative humidity, is appraised at 85.6°F (29.8°C).

What is the average humidity in September in Mount Baldy?

The average relative humidity in September in Mount Baldy, California, is 43%.

When does it start to rain in Mount Baldy?

September is the first month it rains in Mount Baldy, California. Throughout September, in the average 1.5 rainfall days, it receives 0.04" (1mm) of precipitation.

When it does not snow in Mount Baldy?

In Mount Baldy snow does not fall in June through October.

What is the average length of the day in September in Mount Baldy?

In Mount Baldy, California, the average length of the day in September is 12.4h.

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

In Mount Baldy, California, the average sunshine in September is 10.8h.

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

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

Average temperature in September
Mount Baldy, CA

Average temperature in September - Mount Baldy, CA
  • Average high temperature in September: 85.6°F

The warmest month (with the highest average high temperature) is August (88.7°F).
The month with the lowest average high temperature is December (58.1°F).

  • Average low temperature in September: 62.6°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (42.6°F).

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Average pressure in September
Mount Baldy, CA

Average pressure in September - Mount Baldy, CA
  • Average pressure in September: 29.88"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed in September
Mount Baldy, CA

Average wind speed in September - Mount Baldy, CA
  • Average wind speed in September: 4.6mph

The windiest months (with the highest average wind speed) are April and May (6.2mph).
The calmest month (with the lowest average wind speed) is September (4.6mph).

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Average humidity in September
Mount Baldy, CA

Average humidity in September - Mount Baldy, CA
  • Average humidity in September: 43%

The month with the highest relative humidity is March (54%).
The month with the lowest relative humidity is August (40%).

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Average rainfall in September
Mount Baldy, CA

Average rainfall in September - Mount Baldy, CA
  • Average rainfall in September: 0.04"

The wettest month (with the highest rainfall) is February (0.94").
The driest months (with the least rainfall) are July and August (0").

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Average rainfall days in September
Mount Baldy, CA

Average rainfall days in September - Mount Baldy, CA
  • Average rainfall days in September: 1.5 days

The month with the highest number of rainy days is March (5 days).
The month with the least rainy days is June (0.6 days).

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Average snowfall in September
Mount Baldy, CA

Average snowfall in September - Mount Baldy, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.91").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Mount Baldy, CA

Average snowfall days in September - Mount Baldy, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is March (2.2 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Mount Baldy, 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: 10.8h

The month with the most sunshine is July (Average sunshine: 12.2h).
Months with the least sunshine are January, February and December (Average sunshine: 7).

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Average sunshine days in September
Mount Baldy, CA

Average sunshine days in September - Mount Baldy, CA
  • Average sunshine days in September: 28.2 days

The month with the most sunshine days is August (30.3 days).
The month with the least sunshine days is February (23.3 days).

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Average UV index in September
Mount Baldy, CA

Average UV index in September - Mount Baldy, CA
  • Average UV index in September: 6

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are November and December (UV index 3).

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Average cloud cover in September
Mount Baldy, CA

Average cloud cover in September - Mount Baldy, CA
  • Average cloud cover in September: 6

Months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in September
Mount Baldy, CA

Average visibility in September - Mount Baldy, 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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