September weather forecast and climate
West Sacramento, CA

Weather in September

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

Temperature

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

Heat index

The average heat index in September is estimated at a hot 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. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'feels like', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like wind, differences in body mass, height, and shape, metabolic differences, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

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

Rainfall

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

Daylight

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

Sunshine

The average sunshine is 11.2h.

UV index

In West Sacramento, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
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 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 West Sacramento?

The average high-temperature, in September, in West Sacramento, is 89.1°F (31.7°C), while the average low-temperature is 59.4°F (15.2°C). In September, the average heat index (a.k.a. 'feels like', 'real feel'), that factores the actual air temperature with the relative humidity, is estimated at 91°F (32.8°C).

What is the least humid month in West Sacramento?

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

What is the average humidity in September in West Sacramento?

The average relative humidity in September is 45%.

How many days does it rain in September in West Sacramento?

In West Sacramento, California, in September, it is raining for 1.9 days, with typically 0.12" (3mm) of accumulated precipitation.

How many hours of daylight does West Sacramento have in September?

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

How long on average sun shines in September in West Sacramento?

In September, the average sunshine in West Sacramento, California, is 11.2h.

What is the UV index intensity in September in West Sacramento?

In September, the average daily maximum UV index in West Sacramento is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
West Sacramento, CA

Average temperature in September - West 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
West Sacramento, CA

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

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

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Average wind speed in September
West Sacramento, CA

Average wind speed in September - West 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
West Sacramento, CA

Average humidity in September - West 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
West Sacramento, CA

Average rainfall in September - West 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
West Sacramento, CA

Average rainfall days in September - West 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
West Sacramento, CA

Average daylight in September / Average sunshine in September - West 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).

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Average sunshine days in September
West Sacramento, CA

Average sunshine days in September - West 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
West Sacramento, CA

Average UV index in September - West 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).

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Average cloud cover in September
West Sacramento, CA

Average cloud cover in September - West 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
West Sacramento, CA

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

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

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