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 an average temperature varying between 89.1°F (31.7°C) and 59.4°F (15.2°C).

Temperature

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

Heat index

In September, the average heat index is evaluated at a tropical 91.4°F (33°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, metabolic differences, pregnancy), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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

The least humid month is September, with an average relative humidity of 45%.

Rainfall

In Sacramento, during September, the rain falls for 1.9 days and regularly aggregates up to 0.12" (3mm) of precipitation. In Sacramento, during the entire year, the rain falls for 66.6 days and collects up to 7.6" (193mm) of precipitation.

Daylight

In Sacramento, the average length of the day in September is 12h and 25min.
On the first day of September in Sacramento, California, sunrise is at 6:35 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:50 pm PDT.

Sunshine

In September, the average sunshine is 11.2h.

UV index

In Sacramento, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Sacramento?

In Sacramento, 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). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in September is evaluated at 91.4°F (33°C).

What is the least humid month in Sacramento?

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

What is the average humidity in September in Sacramento?

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

How many days does it rain in September in Sacramento?

In September, in Sacramento, California, 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?

The average day length in September is 12h and 25min.

When is the sunrise / sunset in September in Sacramento?

In September, on the first day of the month, sunrise is at 6:35 am and sunset at 7:36 pm. On the last day of the month, in Sacramento, California, sunrise is at 7:00 am and sunset at 6:50 pm PDT.

How long on average sun shines in September in Sacramento?

The average sunshine duration in September is 11.2h.

How high is the UV index in September in Sacramento?

The average daily maximum UV index in September in Sacramento, California, is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Sacramento, CA

Average temperature in September - Sacramento, CA
  • Average high temperature in September: 89.1°F

The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in September: 59.4°F

The month with the highest average low temperature is August (59.5°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).

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Average pressure in September
Sacramento, CA

Average pressure in September - Sacramento, CA
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in September
Sacramento, CA

Average wind speed in September - Sacramento, CA
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is February (6.3mph).
The calmest months (with the lowest average wind speed) are September and November (5mph).

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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%).

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Average rainfall in September
Sacramento, CA

Average rainfall in September - Sacramento, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is March (1.34").
The driest month (with the least rainfall) is August (0.04").

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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).

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

Average daylight in September / Average sunshine in September - Sacramento, CA
  • Average daylight in September: 12h and 25min

The month with the longest days is June (Average daylight: 14h and 49min).
The month with the shortest days is December (Average daylight: 9h and 31min).

  • Average sunshine in September: 11h and 12min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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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).

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Average UV index in September
Sacramento, CA

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

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

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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).

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Average visibility in September
Sacramento, CA

Average visibility in September - Sacramento, CA
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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