September weather forecast
Clearlake Park, CA

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Weather in September

September, the first month of the autumn in Clearlake Park, is also a moderately hot month, with an average temperature fluctuating between 85.1°F (29.5°C) and 55.8°F (13.2°C).

Temperature

The onset of September brings with it an average high-temperature of a warm 85.1°F (29.5°C), showing a negligible variation from the month before. From significant daily highs, Clearlake Park's nights in September cool down to an average low-temperature of 55.8°F (13.2°C).

Heat index

The heat index for September is calculated to be a hot 86°F (30°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.
Heat index evaluations are typically in the context of light winds and shaded environments. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.

Humidity

In Clearlake Park, California, the average relative humidity in September is 45%.

Rainfall

In Clearlake Park, in September, it is raining for 2.1 days, with typically 0.08" (2mm) of accumulated precipitation. In Clearlake Park, during the entire year, the rain falls for 79.8 days and collects up to 17.44" (443mm) of precipitation.

Snowfall

In Clearlake Park, snow does not fall in April through October.

Daylight

In Clearlake Park, the average length of the day in September is 12h and 25min.
On the first day of September in Clearlake Park, sunrise is at 6:40 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:54 pm PDT.

Sunshine

In Clearlake Park, the average sunshine in September is 11.1h.

UV index

The average daily maximum UV index in September in Clearlake Park is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 5 during September translates into these guidelines:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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Frequently asked questions

How hot is September in Clearlake Park?

The average high-temperature and low-temperature in Clearlake Park during September are 85.1°F (29.5°C) and 55.8°F (13.2°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in September is calculated to be 86°F (30°C).

What is the average humidity in September in Clearlake Park?

In September, the average relative humidity in Clearlake Park is 45%.

How many days does it rain in September in Clearlake Park?

In Clearlake Park, in September, during 2.1 rainfall days, 0.08" (2mm) of precipitation is typically accumulated.

When it does not snow in Clearlake Park?

April through October are months without snowfall.

What is the average length of the day in September in Clearlake Park?

In September, the average day length in Clearlake Park is 12h and 25min.

When are sunrise and sunset in September in Clearlake Park?

On the first day of September in Clearlake Park, California, sunrise is at 6:40 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:54 pm PDT.

How many hours of sunshine does Clearlake Park have in September?

The average sunshine duration in September is 11.1h.

What is the UV index reading in September in Clearlake Park?

The average daily maximum UV index in September in Clearlake Park is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Clearlake Park, CA

Average temperature in September - Clearlake Park, CA
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is December (52.7°F).

  • Average low temperature in September: 55.8°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is December (38.1°F).

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Average pressure in September
Clearlake Park, CA

Average pressure in September - Clearlake Park, CA
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).

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Average wind speed in September
Clearlake Park, CA

Average wind speed in September - Clearlake Park, CA
  • Average wind speed in September: 4.6mph

The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).

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Average humidity in September
Clearlake Park, CA

Average humidity in September - Clearlake Park, CA
  • Average humidity in September: 45%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (44%).

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Average rainfall in September
Clearlake Park, CA

Average rainfall in September - Clearlake Park, CA
  • Average rainfall in September: 0.08"

The wettest month (with the highest rainfall) is February (3.7").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in September
Clearlake Park, CA

Average rainfall days in September - Clearlake Park, CA
  • Average rainfall days in September: 2.1 days

The month with the highest number of rainy days is March (13.9 days).
The months with the least rainy days are July and August (1.1 days).

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Average snowfall in September
Clearlake Park, CA

Average snowfall in September - Clearlake Park, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Clearlake Park, CA

Average snowfall days in September - Clearlake Park, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.9 days).
The 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
Clearlake Park, CA

Average daylight in September / Average sunshine in September - Clearlake Park, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 11h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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Average sunshine days in September
Clearlake Park, CA

Average sunshine days in September - Clearlake Park, CA
  • Average sunshine days in September: 27.1 days

The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (15.8 days).

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Average UV index in September
Clearlake Park, CA

Average UV index in September - Clearlake Park, CA
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 2).

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Average cloud cover in September
Clearlake Park, CA

Average cloud cover in September - Clearlake Park, CA
  • Average cloud cover in September: 9

The month with the most cloud cover is March (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in September
Clearlake Park, CA

Average visibility in September - Clearlake Park, 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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Clearlake Park, California, USA

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