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

September weather forecast and climate
Sacramento, CA

The State Capitol Building in Sacramento, California, under the perfect blue sky
The State Capitol Building in Sacramento, California, under the perfect blue sky
The first month of the autumn, September, is still a tropical month in Sacramento, California, with temperature in the range of an average low of 55.8°F (13.2°C) and an average high of 87.3°F (30.7°C).

Temperature

In September, the average high-temperature is practically the same as in August - a still tropical 87.3°F (30.7°C). The average low-temperature, in Sacramento, is 55.8°F (13.2°C).

Heat index

In September, the average heat index is evaluated at a tropical 92.3°F (33.5°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent.

Humidity

In Sacramento, the average relative humidity is 57%.

Rainfall

In Sacramento, California, it is raining for 1.3 days, with typically 0.3" (7.4mm) of accumulated precipitation. Throughout the year, there are 60.1 rainfall days, and 18.5" (470.5mm) of precipitation is accumulated.

Daylight

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

Sunshine

In September, the average sunshine is 11.6h.

UV index

In September, the average daily maximum UV index in Sacramento is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to the UV radiation for the average person.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Sacramento?

In September, in Sacramento, the average high-temperature is 87.3°F (30.7°C), and the average low-temperature is 55.8°F (13.2°C).

What is the average humidity in September in Sacramento?

The average relative humidity in September is 57%.

How much does it rain in Sacramento in September?

In September, the rain falls for 1.3 days. Throughout September, 0.3" (7.4mm) of precipitation is accumulated.

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

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

How long on average sun shines in September in Sacramento?

The average sunshine in September in Sacramento is 11.6h.

What is the UV index intensity in September in Sacramento?

In September, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to the Sun's UV rays.
Average temperature in September - Sacramento, CA
  • Average high temperature in September: 87.2°F

The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is January (53.8°F).

  • Average low temperature in September: 55.7°F

The month with the highest average low temperature is July (58.4°F).
The coldest month (with the lowest average low temperature) is December (38.4°F).

Average humidity in September - Sacramento, CA
  • Average humidity in September: 57%

The month with the highest relative humidity is January (83.3%).
The month with the lowest relative humidity is July (53.2%).

Average rainfall in September - Sacramento, CA
  • Average rainfall in September: 0.3"

The wettest month (with the highest rainfall) is January (3.6").
The driest month (with the lowest rainfall) is July (0").

Average rainfall days in September - Sacramento, CA
  • Average rainfall days in September: 1.3 days

The month with the highest number of rainy days is January (10.3 days).
The month with the lowest number of rainy days is July (0 days).

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

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 11.6h

The month with most sunshine is July (Average sunshine: 14.2h).
The month with least sunshine is December (Average sunshine: 4.6h).

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

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 2).