September weather forecast
San Ardo, CA

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Weather in September

September, the first month of the autumn in San Ardo, is also a moderately hot month, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 60.1°F (15.6°C).

Temperature

The advent of September reveals an average high-temperature of a warm 84.2°F (29°C), showing minimal difference from the prior month. Throughout September, San Ardo braces for a considerable drop from daytime highs, with an average low-temperature of 60.1°F (15.6°C).

Heat index

In September, the heat index is appraised at 84.2°F (29°C). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.
Always consider that heat index estimations are for light winds and places in the shade. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.

Humidity

September is the least humid month, with an average relative humidity of 47%.

Rainfall

In San Ardo, during September, the rain falls for 1.5 days and regularly aggregates up to 0.08" (2mm) of precipitation. In San Ardo, during the entire year, the rain falls for 55.2 days and collects up to 9.06" (230mm) of precipitation.

Daylight

In San Ardo, the average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:36 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:48 pm PDT.

Sunshine

The average sunshine in September is 11.4h.

UV index

June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: During September, 6 as the daily maximum UV index converts into the following advice:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
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Frequently asked questions

Is it hot in San Ardo during September?

In San Ardo, 84.2°F (29°C) is the average high-temperature and 60.1°F (15.6°C) is the average low-temperature during September. In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, is appraised at 84.2°F (29°C).

What is the least humid month in San Ardo?

September is the least humid month, with an average relative humidity of 47%.

What is the average humidity in September in San Ardo?

The average relative humidity in September in San Ardo, California, is 47%.

How much does it rain in San Ardo in September?

In San Ardo, California, in September, during 1.5 rainfall days, 0.08" (2mm) of precipitation is typically accumulated.

How many hours of daylight does San Ardo have in September?

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

What time are sunrise and sunset in September in San Ardo?

On the first day of September in San Ardo, California, sunrise is at 6:36 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:48 pm PDT.

How many hours of sunshine does San Ardo have in September?

The average sunshine duration in September in San Ardo is 11.4h.

What are the months with the highest UV index in San Ardo?

The months with the highest UV index are June through September, with an average maximum UV index of 6.

What is the UV index intensity in September in San Ardo?

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
San Ardo, CA

Average temperature in September - San Ardo, CA
  • Average high temperature in September: 84.2°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (58.1°F).

  • Average low temperature in September: 60.1°F

The month with the highest average low temperature is August (60.8°F).
The coldest months (with the lowest average low temperature) are February and December (42.8°F).

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Average pressure in September
San Ardo, CA

Average pressure in September - San Ardo, CA
  • Average pressure in September: 29.91"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June and September (29.91"Hg).

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Average wind speed in September
San Ardo, CA

Average wind speed in September - San Ardo, CA
  • Average wind speed in September: 4.5mph

The windiest month (with the highest average wind speed) is May (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in September
San Ardo, CA

Average humidity in September - San Ardo, CA
  • Average humidity in September: 47%

The month with the highest relative humidity is February (68%).
The month with the lowest relative humidity is September (47%).

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Average rainfall in September
San Ardo, CA

Average rainfall in September - San Ardo, CA
  • Average rainfall in September: 0.08"

The wettest month (with the highest rainfall) is January (1.77").
The driest month (with the least rainfall) is August (0.04").

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Average rainfall days in September
San Ardo, CA

Average rainfall days in September - San Ardo, CA
  • Average rainfall days in September: 1.5 days

The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is August (0.8 days).

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Average daylight in September /
Average sunshine in September
San Ardo, CA

Average daylight in September / Average sunshine in September - San Ardo, 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 48min).

  • Average sunshine in September: 11h and 2min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 24min).

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Average sunshine days in September
San Ardo, CA

Average sunshine days in September - San Ardo, CA
  • Average sunshine days in September: 27.8 days

The month with the most sunshine days is August (29 days).
The month with the least sunshine days is February (19.8 days).

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Average UV index in September
San Ardo, CA

Average UV index in September - San Ardo, CA
  • Average UV index in September: 6

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are February, November and December (UV index 3).

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Average cloud cover in September
San Ardo, CA

Average cloud cover in September - San Ardo, CA
  • Average cloud cover in September: 5

The month with the most cloud cover is March (Cloud cover 29).
The months with the least cloud cover are July, August and September (Cloud cover 5).

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Average visibility in September
San Ardo, CA

Average visibility in September - San Ardo, 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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San Ardo, California, USA

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