September weather forecast
Davis, CA

Weather in September

The first month of the autumn, September, is still a tropical month in Davis, California, with an average temperature ranging between max 88.7°F (31.5°C) and min 58.6°F (14.8°C).

Temperature

In Davis, the average high-temperature in September is practically the same as in August - a still tropical 88.7°F (31.5°C). The average low-temperature, in September, is 58.6°F (14.8°C).

Heat index

In September, the average heat index is evaluated at a tropical 90.5°F (32.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
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 'real feel', 'apparent temperature', 'feels like', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like differences in body mass, height, and shape, pregnancy, wind, 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 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 September, the rain falls for 2.2 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. Throughout the year, in Davis, there are 67.4 rainfall days, and 12.17" (309mm) of precipitation is accumulated.

Daylight

In September, the average length of the day in Davis, California, is 12h and 25min.
On the first day of the month, sunrise is at 6:36 am and sunset at 7:37 pm. On the last day of September, in Davis, sunrise is at 7:02 am and sunset at 6:51 pm PDT.

Sunshine

In September, the average sunshine is 11.2h.

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Davis?

The average high-temperature, in September, in Davis, is 88.7°F (31.5°C), while the average low-temperature is 58.6°F (14.8°C). In September, the average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 90.5°F (32.5°C).

What is the least humid month in Davis?

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

What is the average humidity in September in Davis?

The average relative humidity in September in Davis, California, is 45%.

How many days does it rain in September in Davis?

In Davis, California, in September, during 2.2 rainfall days, 0.12" (3mm) of precipitation is typically accumulated.

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

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

When is the sunrise / sunset in September in Davis?

In September, on the first day of the month, sunrise is at 6:36 am and sunset at 7:37 pm. On the last day of the month, in Davis, sunrise is at 7:02 am and sunset at 6:51 pm PDT.

How long on average sun shines in September in Davis?

In September, the average sunshine duration in Davis is 11.2h.

What is the UV index reading in September in Davis?

In Davis, California, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Davis, CA

Average temperature in September - Davis, CA
  • Average high temperature in September: 88.7°F

The warmest month (with the highest average high temperature) is July (93.6°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in September: 58.6°F

The month with the highest average low temperature is August (59.2°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).

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Average pressure in September
Davis, CA

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).

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Average wind speed in September
Davis, CA

Average wind speed in September - Davis, CA
  • Average wind speed in September: 5.1mph

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

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Average humidity in September
Davis, CA

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

The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (45%).

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Average rainfall in September
Davis, CA

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

The wettest month (with the highest rainfall) is February (2.44").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in September
Davis, CA

Average rainfall days in September - Davis, CA
  • Average rainfall days in September: 2.2 days

The month with the highest number of rainy days is March (12.5 days).
The months with the least rainy days are July and August (0.8 days).

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

Average daylight in September / Average sunshine in September - Davis, 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 32min).

  • 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 36min).

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Average sunshine days in September
Davis, CA

Average sunshine days in September - Davis, CA
  • Average sunshine days in September: 27.6 days

The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (17.8 days).

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Average UV index in September
Davis, CA

Average UV index in September - Davis, 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
Davis, CA

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

The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 5).

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Average visibility in September
Davis, CA

Average visibility in September - Davis, 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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