September weather forecast and climate
Fresno, CA

The artificial Millerton Lake near Fresno in California, USA, clear skies and mountain ranges in view
The artificial Millerton Lake near Fresno in California, USA, clear skies and mountain ranges in view

What is the temperature in September in Fresno?

In September, the average high-temperature is 90.9°F (32.7°C), and the average low-temperature is 61.5°F (16.4°C).

How many days does it rain in September in Fresno?

In September, in Fresno, the rain falls for 1 days. Throughout September, 0.2" (4.3mm) of precipitation is accumulated.
Average temperature in September - Fresno, CA
  • Average high temperature in September: 90.9°F

The warmest month (with the highest average high temperature) is July (98.4°F).
The month with the lowest average high temperature is January (54.8°F).

  • Average low temperature in September: 61.5°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is December (38°F).

Average humidity in September - Fresno, CA
  • Average humidity in September: 50%

The month with the highest relative humidity is December (84.2%).
The month with the lowest relative humidity is July (39.2%).

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

The wettest month (with the highest rainfall) is January (2.2").
Driest months (with the lowest rainfall) are July and August (0").

Average rainfall days in September - Fresno, CA
  • Average rainfall days in September: 1 days

The month with the highest number of rainy days is February (8.6 days).
The month with the lowest number of rainy days is July (0.2 days).

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

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 11.5h

The month with most sunshine is July (Average sunshine: 13.8h).
The month with least sunshine is December (Average sunshine: 4.1h).

Average UV index in September - Fresno, CA
  • Average UV index in September: 7

Months with the highest UV index are June and July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).

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