Irvine
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Irvine, CA

A unique sunrise sky view over the neon-lit city of Irvine in California, with highway lights, and the distant hill ranges and skyscape
A unique sunrise sky view over the neon-lit city of Irvine in California, with highway lights, and the distant hill ranges and skyscape
The first month of the autumn, September, is still a tropical month in Irvine, California, with average temperature ranging between min 58.5°F (14.7°C) and max 89.1°F (31.7°C).

Temperature

In Irvine, California, the average high-temperature is almost the same as in August - a still tropical 89.1°F (31.7°C). The average low-temperature, is 58.5°F (14.7°C).

Rainfall

In Irvine, in September, 0.2" (5.1mm) of precipitation is typically accumulated. Throughout the year, 14.3" (363.9mm) of rain is accumulated.

Daylight

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

What is the temperature in September in Irvine?

In September, the average high-temperature is 89.1°F (31.7°C), and the average low-temperature is 58.5°F (14.7°C).

How much does it rain in Irvine in September?

Throughout September, in Irvine, 0.2" (5.1mm) of precipitation is accumulated.

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

In September, the average length of the day in Irvine is 12.4h.
Average temperature in September - Irvine, CA
  • Average high temperature in September: 89.1°F

The warmest month (with the highest average high temperature) is August (90.3°F).
The month with the lowest average high temperature is December (67.1°F).

  • Average low temperature in September: 58.4°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is December (45.6°F).

Average rainfall in September - Irvine, CA
  • Average rainfall in September: 0.2"

The wettest month (with the highest rainfall) is February (3.3").
Driest months (with the lowest rainfall) are June, July and August (0.1").

Average daylight in September - Irvine, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).