September weather forecast and climate
Montalvo, CA

Weather in September

The first month of the autumn, September, is still a warm month in Montalvo, California, with average temperature ranging between min 62.2°F (16.8°C) and max 74.3°F (23.5°C).

Temperature

August and September, with an average high-temperature of 74.3°F (23.5°C), are the warmest months.

Humidity

In Montalvo, the average relative humidity is 62%.

Rainfall

In September, in Montalvo, California, the rain falls for 3.1 days. Throughout September, 0.2" (5mm) of precipitation is accumulated. In Montalvo, during the entire year, the rain falls for 47.8 days and collects up to 6.97" (177mm) of precipitation.

Daylight

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

Sunshine

In Montalvo, California, the average sunshine is 10.9h.

UV index

In September, the average daily maximum UV index in Montalvo is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. 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 are the warmest months in Montalvo?

August and September, with an average high-temperature of 74.3°F (23.5°C), are warmest months.

What is the temperature in September in Montalvo?

In Montalvo, in September, the average high-temperature is 74.3°F (23.5°C), and the average low-temperature is 62.2°F (16.8°C).

What is the average humidity in September in Montalvo?

In Montalvo, California, the average relative humidity in September is 62%.

How many days does it rain in September in Montalvo?

In Montalvo, California, in September, during 3.1 rainfall days, 0.2" (5mm) of precipitation is typically accumulated.

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

The average length of the day in September is 12.4h.

How many hours of sunshine does Montalvo have in September?

The average sunshine in September in Montalvo is 10.9h.

How high is the UV index in September in Montalvo?

The average daily maximum UV index in September in Montalvo is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Montalvo, CA

Average temperature in September - Montalvo, CA
  • Average high temperature in September: 74.3°F

The warmest months (with the highest average high temperature) are August and September (74.3°F).
The month with the lowest average high temperature is February (59°F).

  • Average low temperature in September: 62.2°F

The month with the highest average low temperature is August (62.6°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).

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Average pressure in September
Montalvo, CA

Average pressure in September - Montalvo, CA
  • Average pressure in September: 29.9"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is September (29.9").

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Average wind speed in September
Montalvo, CA

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

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).

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Average humidity in September
Montalvo, CA

Average humidity in September - Montalvo, CA
  • Average humidity in September: 62%

Months with the highest relative humidity are June and July (69%).
The month with the lowest relative humidity is November (56%).

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Average rainfall in September
Montalvo, CA

Average rainfall in September - Montalvo, CA
  • Average rainfall in September: 0.2"

The wettest month (with the highest rainfall) is January (1.34").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in September
Montalvo, CA

Average rainfall days in September - Montalvo, CA
  • Average rainfall days in September: 3.1 days

The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is August (2.1 days).

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

Average daylight in September / Average sunshine in September - Montalvo, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 10.9h

Months with the most sunshine are July and August (Average sunshine: 12h).
Months with the least sunshine are January, February and December (Average sunshine: 6.8).

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Average sunshine days in September
Montalvo, CA

Average sunshine days in September - Montalvo, CA
  • Average sunshine days in September: 21.5 days

The month with the most sunshine days is October (26 days).
The month with the least sunshine days is July (20.4 days).

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Average UV index in September
Montalvo, CA

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

The month with the highest UV index is August (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in September
Montalvo, CA

Average cloud cover in September - Montalvo, CA
  • Average cloud cover in September: 7

The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in September
Montalvo, CA

Average visibility in September - Montalvo, 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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