September weather forecast and climate
South Lake, CA

Weather in September

September, the first month of the autumn, in South Lake, is still a warm month, with temperature in the range of an average low of 54.5°F (12.5°C) and an average high of 79.3°F (26.3°C).

Temperature

In September, the average high-temperature slightly decreases, from 85.3°F (29.6°C) in August, to a still moderately hot 79.3°F (26.3°C). In September, the average low-temperature is 54.5°F (12.5°C).

Humidity

The average relative humidity in South Lake is 35%.

Rainfall

In South Lake, in September, it is raining for 3.4 days, with typically 0.24" (6mm) of accumulated precipitation. Throughout the year, in South Lake, there are 65.1 rainfall days, and 12.28" (312mm) of precipitation is accumulated.

Snowfall

In South Lake, California, snow does not fall in June through October.

Daylight

The average length of the day in September is 12.4h.

Sunshine

In South Lake, the average sunshine is 10.9h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in South Lake?

The average high-temperature, in September, in South Lake, is 79.3°F (26.3°C), while the average low-temperature is 54.5°F (12.5°C).

What is the average humidity in September in South Lake?

In South Lake, the average relative humidity in September is 35%.

How many days does it rain in September in South Lake?

In South Lake, California, during September, the rain falls for 3.4 days and regularly aggregates up to 0.24" (6mm) of precipitation.

When it does not snow in South Lake?

June through October are months without snowfall.

How many hours of daylight does South Lake have in September?

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

How long on average sun shines in September in South Lake?

In September, the average sunshine is 10.9h.

How high is the UV index in September in South Lake?

In South Lake, California, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
South Lake, CA

Average temperature in September - South Lake, CA
  • Average high temperature in September: 79.3°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is December (49.3°F).

  • Average low temperature in September: 54.5°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is December (32.4°F).

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Average pressure in September
South Lake, CA

Average pressure in September - South Lake, CA
  • Average pressure in September: 29.89"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in September
South Lake, CA

Average wind speed in September - South Lake, CA
  • Average wind speed in September: 5.4mph

The windiest month (with the highest average wind speed) is May (7.4mph).
The calmest month (with the lowest average wind speed) is September (5.4mph).

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Average humidity in September
South Lake, CA

Average humidity in September - South Lake, CA
  • Average humidity in September: 35%

The month with the highest relative humidity is February (61%).
The month with the lowest relative humidity is August (31%).

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Average rainfall in September
South Lake, CA

Average rainfall in September - South Lake, CA
  • Average rainfall in September: 0.24"

The wettest month (with the highest rainfall) is January (2.24").
The driest month (with the least rainfall) is June (0.2").

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Average rainfall days in September
South Lake, CA

Average rainfall days in September - South Lake, CA
  • Average rainfall days in September: 3.4 days

The month with the highest number of rainy days is March (10.1 days).
The month with the least rainy days is June (1.5 days).

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Average snowfall in September
South Lake, CA

Average snowfall in September - South Lake, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.98").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
South Lake, CA

Average snowfall days in September - South Lake, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.7 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
South Lake, CA

Average daylight in September / Average sunshine in September - South Lake, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 10.9h

Months with the most sunshine are June and July (Average sunshine: 12h).
Months with the least sunshine are January and February (Average sunshine: 6.4).

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Average sunshine days in September
South Lake, CA

Average sunshine days in September - South Lake, CA
  • Average sunshine days in September: 25.9 days

The month with the most sunshine days is June (27.4 days).
The month with the least sunshine days is February (19.2 days).

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Average UV index in September
South Lake, CA

Average UV index in September - South Lake, CA
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are November and December (UV index 2).

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Average cloud cover in September
South Lake, CA

Average cloud cover in September - South Lake, CA
  • Average cloud cover in September: 6

The month with the most cloud cover is March (Cloud cover 31).
Months with the least cloud cover are August and September (Cloud cover 6).

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Average visibility in September
South Lake, CA

Average visibility in September - South Lake, 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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