September weather forecast
Novato, CA

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Weather in September

The first month of the autumn, September, is still a warm month in Novato, California, with an average temperature ranging between min 55.8°F and max 75.4°F.

Temperature

The warmest period is September, when temperatures fluctuate between an average high of 75.4°F and a low of 55.8°F.

Humidity

In Novato, the average relative humidity in September is 67%.

Rainfall

July through September are months with the least rain when the rain falls for 3 days and typically aggregates up to 0.08" of rain.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of September in Novato, sunrise is at 6:40 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:55 pm PDT.

Sunshine

The average sunshine in September is 10.9h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: In September, the maximum UV index of 5 transforms into these recommendations:
Take precautions - Protection against sun damage is advised. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

What is the hottest time of year in Novato?

In Novato, September is the warmest month, with temperatures averaging a high of 75.4°F and a low of 55.8°F.

What is the average September temperature in Novato?

The high-temperature, in September, in Novato, records 75.4°F, while the low-temperature is 55.8°F.

What is the average humidity in September in Novato?

In September, the average relative humidity in Novato, California, is 67%.

What is the driest month in Novato?

July through September are months with the least rain in Novato, California, when the rain falls for 3 days and typically aggregates up to 0.08" of rain.

How much does it rain in Novato in September?

In Novato, in September, during 3 rainfall days, 0.08" of precipitation is typically accumulated.

How many hours of daylight does Novato have in September?

In Novato, California, the average day length in September is 12h and 25min.

What time are sunrise and sunset in September in Novato?

On the first day of September, sunrise is at 6:40 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:55 pm PDT.

How many hours of sunshine does Novato have in September?

In September, the average sunshine duration is 10.9h.

What is the UV index intensity in September in Novato?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Novato, CA

Average temperature in September - Novato, CA
  • Average high temperature in September: 75.4°F

The warmest month (with the highest average high temperature) is September (75.4°F).
The month with the lowest average high temperature is December (55.2°F).

  • Average low temperature in September: 55.8°F

The month with the highest average low temperature is September (55.8°F).
The coldest month (with the lowest average low temperature) is December (43.9°F).

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Average pressure in September
Novato, CA

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

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in September
Novato, CA

Average wind speed in September - Novato, CA
  • Average wind speed in September: 5.5mph

The windiest month (with the highest average wind speed) is May (7.3mph).
The calmest month (with the lowest average wind speed) is November (5.1mph).

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Average humidity in September
Novato, CA

Average humidity in September - Novato, CA
  • Average humidity in September: 67%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (66%).

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Average rainfall in September
Novato, CA

Average rainfall in September - Novato, CA
  • Average rainfall in September: 0.08"

The wettest month (with the highest rainfall) is February (1.65").
The driest months (with the least rainfall) are July, August and September (0.08").

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Average rainfall days in September
Novato, CA

Average rainfall days in September - Novato, CA
  • Average rainfall days in September: 3 days

The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is June (2 days).

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

Average daylight in September / Average sunshine in September - Novato, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 10h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

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Average sunshine days in September
Novato, CA

Average sunshine days in September - Novato, CA
  • Average sunshine days in September: 24 days

The month with the most sunshine days is October (24.9 days).
The month with the least sunshine days is March (18.5 days).

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Average UV index in September
Novato, CA

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

The month with the highest UV index is June (UV index 6).
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
Novato, CA

Average cloud cover in September - Novato, CA
  • Average cloud cover in September: 14

The month with the most cloud cover is March (Cloud cover 38).
The months with the least cloud cover are July and September (Cloud cover 14).

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Average visibility in September
Novato, CA

Average visibility in September - Novato, 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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Novato, California, USA

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