September weather forecast
Westport, CA

Share

Weather in September

The first month of the autumn, September, is still a comfortable month in Westport, California, with temperature in the range of an average low of 54.9°F (12.7°C) and an average high of 67.5°F (19.7°C).

Temperature

September, known for its average high temperature of 67.5°F (19.7°C) and an average low temperature of 54.9°F (12.7°C), is the warmest month.

Humidity

In September, the average relative humidity is 76%.

Rainfall

In September, the rain falls for 2.1 days. Throughout September, 0.16" (4mm) of precipitation is accumulated. In Westport, during the entire year, the rain falls for 68.4 days and collects up to 9.53" (242mm) of precipitation.

Snowfall

In Westport, snow does not fall in January, March through December.

Daylight

In September, the average length of the day in Westport is 12h and 26min.
On the first day of September in Westport, sunrise is at 6:44 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:58 pm PDT.

Sunshine

The average sunshine in September is 10.7h.

UV index

In September, the average daily maximum UV index in Westport is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 4 during September translates into these guidelines:
Be vigilant - Preventing sunburn is recommended. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
[Resources]

Frequently asked questions

What part of the year is the hottest in Westport?

September is the warmest month in Westport, California, with an average high-temperature of 67.5°F (19.7°C) and an average low-temperature of 54.9°F (12.7°C).

What are the temperatures in Westport in September?

The high-temperature during September is 67.5°F (19.7°C) and the low-temperature is 54.9°F (12.7°C).

What is the average humidity in September in Westport?

In Westport, the average relative humidity in September is 76%.

How many days does it rain in September in Westport?

In Westport, California, in September, it is raining for 2.1 days, with typically 0.16" (4mm) of accumulated precipitation.

When it does not snow in Westport?

In Westport, California, snow does not fall in January, March through December.

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

The average day length in September in Westport, California, is 12h and 26min.

When is the sunrise / sunset in September in Westport?

On the first day of September in Westport, California, sunrise is at 6:44 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:58 pm PDT.

How many hours of sunshine does Westport have in September?

The average sunshine duration in September in Westport, California, is 10.7h.

What is the UV index intensity in September in Westport?

In September, the average daily maximum UV index in Westport, California, is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's 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
Westport, CA

Average temperature in September - Westport, CA
  • Average high temperature in September: 67.5°F

The warmest month (with the highest average high temperature) is September (67.5°F).
The months with the lowest average high temperature are February and December (54.3°F).

  • Average low temperature in September: 54.9°F

The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is February (45.5°F).

[Resources]

Average pressure in September
Westport, CA

Average pressure in September - Westport, CA
  • Average pressure in September: 29.94"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).

[Resources]

Average wind speed in September
Westport, CA

Average wind speed in September - Westport, CA
  • Average wind speed in September: 8.3mph

The windiest month (with the highest average wind speed) is June (10.9mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).

[Resources]

Average humidity in September
Westport, CA

Average humidity in September - Westport, CA
  • Average humidity in September: 76%

The months with the highest relative humidity are March, May and August (80%).
The month with the lowest relative humidity is October (75%).

[Resources]

Average rainfall in September
Westport, CA

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

The wettest month (with the highest rainfall) is December (1.77").
The driest months (with the least rainfall) are June, July and August (0.08").

[Resources]

Average rainfall days in September
Westport, CA

Average rainfall days in September - Westport, CA
  • Average rainfall days in September: 2.1 days

The month with the highest number of rainy days is March (11.4 days).
The months with the least rainy days are June and August (1.8 days).

[Resources]

Average snowfall in September
Westport, CA

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

The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

[Resources]

Average snowfall days in September
Westport, CA

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

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

[Resources]

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

Average daylight in September / Average sunshine in September - Westport, 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 24min).

  • Average sunshine in September: 10h and 4min

The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

[Resources]

Average sunshine days in September
Westport, CA

Average sunshine days in September - Westport, CA
  • Average sunshine days in September: 27.7 days

The month with the most sunshine days is July (28.2 days).
The month with the least sunshine days is March (18.4 days).

[Resources]

Average UV index in September
Westport, CA

Average UV index in September - Westport, CA
  • Average UV index in September: 4

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).

[Resources]

Average cloud cover in September
Westport, CA

Average cloud cover in September - Westport, CA
  • Average cloud cover in September: 12

The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 10).

[Resources]

Average visibility in September
Westport, CA

Average visibility in September - Westport, 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).

[Resources]

Westport, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location