September weather forecast
Sacramento, CA

The State Capitol Building in Sacramento, California
The State Capitol Building in Sacramento, California

Weather in September

September, the first month of the autumn, in Sacramento, is still a hot month, with average temperature fluctuating between 89.1°F (31.7°C) and 59.4°F (15.2°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still tropical 89.1°F (31.7°C). The average low-temperature, in Sacramento, is 59.4°F (15.2°C).

Heat index

In September, the average heat index is appraised at a tropical 91°F (32.8°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. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like wind, differences in body mass, height, and shape, pregnancy, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

With an average relative humidity of 45%, September is the least humid month.

Rainfall

In September, the rain falls for 1.9 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. Throughout the year, there are 66.6 rainfall days, and 7.6" (193mm) of precipitation is accumulated.

Daylight

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

Sunshine

The average sunshine is 11.2h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
[Resources]

FAQ

What is the temperature in September in Sacramento?

In Sacramento, California, in September, the average high-temperature is 89.1°F (31.7°C), and the average low-temperature is 59.4°F (15.2°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is appraised at 91°F (32.8°C).

What is the least humid month in Sacramento?

With an average relative humidity of 45%, September is the least humid month in Sacramento.

What is the average humidity in September in Sacramento?

In September, the average relative humidity in Sacramento, California, is 45%.

How many days does it rain in September in Sacramento?

In September, the rain falls for 1.9 days. Throughout September, 0.12" (3mm) of precipitation is accumulated.

How many hours of daylight does Sacramento have in September?

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

How long on average sun shines in September in Sacramento?

The average sunshine in September in Sacramento is 11.2h.

What is the UV index reading in September in Sacramento?

In Sacramento, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in September
Sacramento, CA

Average temperature in September - Sacramento, CA
  • Average high temperature in September: 31.7°C

The warmest month (with the highest average high temperature) is July (34.8°C).
The month with the lowest average high temperature is December (12.5°C).

  • Average low temperature in September: 15.2°C

The month with the highest average low temperature is August (15.3°C).
The coldest month (with the lowest average low temperature) is December (5.2°C).

[Resources]

Average pressure in September
Sacramento, CA

Average pressure in September - Sacramento, CA
  • Average pressure in September: 1013.1mbar

The month with the highest atmospheric pressure is January (1021mbar).
The month with the lowest atmospheric pressure is June (1012.6mbar).

[Resources]

Average wind speed in September
Sacramento, CA

Average wind speed in September - Sacramento, CA
  • Average wind speed in September: 8km/h

The windiest month (with the highest average wind speed) is February (10.2km/h).
The calmest months (with the lowest average wind speed) are September and November (8km/h).

[Resources]

Average humidity in September
Sacramento, CA

Average humidity in September - Sacramento, CA
  • Average humidity in September: 45%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (45%).

[Resources]

Average rainfall in September
Sacramento, CA

Average rainfall in September - Sacramento, CA
  • Average rainfall in September: 3mm

The wettest month (with the highest rainfall) is March (34mm).
The driest month (with the least rainfall) is August (1mm).

[Resources]

Average rainfall days in September
Sacramento, CA

Average rainfall days in September - Sacramento, CA
  • Average rainfall days in September: 1.9 days

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (1.2 days).

[Resources]

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

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 the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 11.2h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.5h).

[Resources]

Average sunshine days in September
Sacramento, CA

Average sunshine days in September - Sacramento, CA
  • Average sunshine days in September: 27.8 days

The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (17.7 days).

[Resources]

Average UV index in September
Sacramento, CA

Average UV index in September - Sacramento, CA
  • Average UV index in September: 5

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

[Resources]

Average cloud cover in September
Sacramento, CA

Average cloud cover in September - Sacramento, CA
  • Average cloud cover in September: 9

The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 6).

[Resources]

Average visibility in September
Sacramento, CA

Average visibility in September - Sacramento, CA
  • Average visibility in September: 10km

Months with the highest visibility are February, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, March and April (9km).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location