Chula Vista
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Chula Vista, CA

Wood and rope barriers at sunset on the waterfront of Bayside Park in Chula Vista, San Diego Bay, California
Wood and rope barriers at sunset on the waterfront of Bayside Park in Chula Vista, San Diego Bay, California
September, the first month of the autumn, in Chula Vista, is still a warm month, with average temperature varying between 78.1°F (25.6°C) and 63.1°F (17.3°C).

Temperature

September is the warmest month, with an average high-temperature of 78.1°F (25.6°C) and an average low-temperature of 63.1°F (17.3°C).

Rainfall

In Chula Vista, it is raining for 0.6 days, with typically 0.1" (3.6mm) of accumulated precipitation. Throughout the year, there are 32.4 rainfall days, and 9.6" (245mm) of precipitation is accumulated.

Ocean temperature

In September, the average ocean temperature is 66.7°F (19.3°C).
Note: Swimming in 66.7°F (19.3°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

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

What is the warmest month in Chula Vista?

With an average high-temperature of 78.1°F (25.6°C) and an average low-temperature of 63.1°F (17.3°C), September is the warmest month in Chula Vista, California.

What is the temperature in September in Chula Vista?

In September, in Chula Vista, the average high-temperature is 78.1°F (25.6°C), and the average low-temperature is 63.1°F (17.3°C).

How many days does it rain in September in Chula Vista?

In September, in Chula Vista, the rain falls for 0.6 days. Throughout September, 0.1" (3.6mm) of precipitation is accumulated.

What is the ocean temperature in September in Chula Vista?

In Chula Vista, California, the average seawater temperature in September is 66.7°F (19.3°C). For swimming, a surface water temperature of 66.7°F (19.3°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Chula Vista have in September?

In Chula Vista, the average length of the day in September is 12.4h.
Average temperature in September - Chula Vista, CA
  • Average high temperature in September: 78°F

The warmest month (with the highest average high temperature) is September (78°F).
The month with the lowest average high temperature is December (67.4°F).

  • Average low temperature in September: 63.2°F

The month with the highest average low temperature is August (65.6°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).

Average rainfall in September - Chula Vista, CA
  • Average rainfall in September: 0.1"

The wettest month (with the highest rainfall) is February (2.3").
Driest months (with the lowest rainfall) are July and August (0").

Average rainfall days in September - Chula Vista, CA
  • Average rainfall days in September: 0.6 days

The month with the highest number of rainy days is February (6.6 days).
Months with the lowest number of rainy days are July and August (0.3 days).

Average sea temperature in September - Chula Vista, CA
  • Average sea temperature in September: 66.7°F

The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (58.7°F).

Average daylight in September - Chula Vista, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).