September weather forecast
Montalvo, CA

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Weather in September

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

Temperature

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

Humidity

The average relative humidity in September is 62%.

Rainfall

In Montalvo, in September, during 3.1 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. Throughout the year, there are 47.8 rainfall days, and 6.97" (177mm) of precipitation is accumulated.

Daylight

In Montalvo, the average length of the day in September is 12h and 22min.
On the first day of September, sunrise is at 6:30 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:41 pm PDT.

Sunshine

In September, the average sunshine is 10.9h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 5 in September transforms into the following instructions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.

Frequently asked questions

What is the warmest month?

Temperatures reach their maximum during August and September, recording an average high-temperature of 74.3°F (23.5°C).

What is the temperature in September?

September temperatures vary between a high-temperature of 74.3°F (23.5°C) and a low-temperature of 62.2°F (16.8°C).

What is the average humidity in September?

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

How much does it rain in September?

In Montalvo, in September, it is raining for 3.1 days, with typically 0.2" (5mm) of accumulated precipitation.

How many hours of daylight does Montalvo have in September?

The average day length in September is 12h and 22min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:30 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:41 pm PDT.

How many hours of sunshine does Montalvo have in September?

In September, the average sunshine duration is 10.9h.

How high is the UV index in September?

In Montalvo, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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).

Average pressure in September
Montalvo, CA

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

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

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).

Average humidity in September
Montalvo, CA

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

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

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").

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).

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

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

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 10h and 5min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).

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).

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).

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).

Average visibility in September
Montalvo, CA

Average visibility in September - Montalvo, 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).

Montalvo, California, USA

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