September weather forecast
Lakeport, CA

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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 still a warm month, with an average temperature ranging between max 84.2°F (29°C) and min 54.1°F (12.3°C).

Temperature

As September takes its course, Lakeport's average high-temperature registers at a moderately hot 84.2°F (29°C), closely aligning with the preceding month. September nights bring a significant cooling from the heat of the day, with averages of 54.1°F (12.3°C).

Heat index

The average heat index in September is appraised at 84.2°F (29°C). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.
When referencing the heat index, its values are suitable for shady environments and light breezes. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.

Humidity

The average relative humidity in September is 48%.

Rainfall

In September, the rain falls for 2.5 days. Throughout September, 0.16" (4mm) of precipitation is accumulated. Throughout the year, there are 92 rainfall days, and 21.02" (534mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:41 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:55 pm PDT.

Sunshine

In September, the average sunshine in Lakeport is 11h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: A daily high UV index of 5 in September leads to these guidelines:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

In Lakeport, 84.2°F (29°C) is the average high-temperature and 54.1°F (12.3°C) is the average low-temperature during September. In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 84.2°F (29°C).

What is the average humidity in September?

The average relative humidity in September is 48%.

How many days does it rain in September?

In September, the rain falls for 2.5 days. Throughout September, 0.16" (4mm) of precipitation is accumulated.

When it does not snow in Lakeport?

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

How many hours of daylight does Lakeport have in September?

In Lakeport, the average day length in September is 12h and 26min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:41 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:55 pm PDT.

How long on average sun shines in September?

In Lakeport, the average sunshine duration in September is 11h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability 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
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).

Average pressure in September
Lakeport, CA

Average pressure in September - Lakeport, 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).

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).

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%).

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").

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).
The months with the least rainy days are July and August (1.3 days).

Average snowfall in September
Lakeport, CA

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

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

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).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Lakeport, CA

Average daylight in September / Average sunshine in September - Lakeport, 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 0min

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).

Average sunshine days in September
Lakeport, CA

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

The 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).

Average UV index in September
Lakeport, CA

Average UV index in September - Lakeport, CA
  • Average UV index in September: 5

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

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).
The months with the least cloud cover are July and August (Cloud cover 5).

Average visibility in September
Lakeport, CA

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

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

Lakeport, California, USA

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