September weather forecast and climate
Lakeport, CA

An intricately designed house surrounded by a natural fence, trees, and neat lawns in Lakeport, California
An intricately designed house surrounded by a natural fence, trees, and neat lawns in Lakeport, California

Weather in September

September, the first month of the autumn, in Lakeport, is also a moderately hot month, with average temperature fluctuating between 54.1°F (12.3°C) and 84.2°F (29°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a moderately hot 84.2°F (29°C). The average low-temperature, in Lakeport, is 54.1°F (12.3°C).

Heat index

The average heat index in September is evaluated at 84.9°F (29.4°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, differences in body mass, height, and shape, metabolic differences). 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity is 48%.

Rainfall

In Lakeport, in September, during 2.5 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. In Lakeport, during the entire year, the rain falls for 92 days and collects up to 21.02" (534mm) of precipitation.

Snowfall

In Lakeport, California, snow does not fall in April through October.

Daylight

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

Sunshine

In Lakeport, the average sunshine is 11h.

UV index

In September, the average daily maximum UV index in Lakeport, California, is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for the average person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Lakeport?

In Lakeport, in September, the average high-temperature is 84.2°F (29°C), and the average low-temperature is 54.1°F (12.3°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), that calculates temperature value influenced by the moisture in the air, in September is appraised at 84.9°F (29.4°C).

What is the average humidity in September in Lakeport?

The average relative humidity in September is 48%.

How much does it rain in Lakeport in September?

In Lakeport, in September, it is raining for 2.5 days, with typically 0.16" (4mm) of accumulated precipitation.

When it does not snow in Lakeport?

April through October are months without snowfall in Lakeport.

What is the average length of the day in September in Lakeport?

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

How long on average sun shines in September in Lakeport?

The average sunshine in September is 11h.

How high is the UV index in September in Lakeport?

In Lakeport, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV rays.

Average temperature in September
Lakeport, CA

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

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (52.3°F).

  • Average low temperature in September: 54.1°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).

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Average pressure in September
Lakeport, CA

Average pressure in September - Lakeport, CA
  • Average pressure in September: 29.92"

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

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Average wind speed in September
Lakeport, CA

Average wind speed in September - Lakeport, CA
  • Average wind speed in September: 4.3mph

The windiest month (with the highest average wind speed) is April (5.3mph).
The calmest month (with the lowest average wind speed) is November (4.1mph).

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Average humidity in September
Lakeport, CA

Average humidity in September - Lakeport, CA
  • Average humidity in September: 48%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (47%).

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Average rainfall in September
Lakeport, CA

Average rainfall in September - Lakeport, CA
  • Average rainfall in September: 0.16"

The wettest month (with the highest rainfall) is February (4.06").
The driest month (with the least rainfall) is July (0.04").

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Average rainfall days in September
Lakeport, CA

Average rainfall days in September - Lakeport, CA
  • Average rainfall days in September: 2.5 days

The month with the highest number of rainy days is March (15.9 days).
Months with the least rainy days are July and August (1.3 days).

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Average snowfall in September
Lakeport, CA

Average snowfall in September - Lakeport, CA
  • Average snowfall in September: 0"

Months with the highest snowfall are January and February (0.47").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Lakeport, CA

Average snowfall days in September - Lakeport, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.9 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
Lakeport, CA

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

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 11h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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Average sunshine days in September
Lakeport, CA

Average sunshine days in September - Lakeport, CA
  • Average sunshine days in September: 26.7 days

Months with the most sunshine days are July and August (28.3 days).
The month with the least sunshine days is March (13.7 days).

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Average UV index in September
Lakeport, CA

Average UV index in September - Lakeport, 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 January, February, November and December (UV index 3).

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Average cloud cover in September
Lakeport, CA

Average cloud cover in September - Lakeport, CA
  • Average cloud cover in September: 10

The month with the most cloud cover is March (Cloud cover 44).
Months with the least cloud cover are July and August (Cloud cover 5).

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Average visibility in September
Lakeport, CA

Average visibility in September - Lakeport, CA
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are March and December (5mi).

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