September weather forecast
La Verne, CA

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Weather in September

September, the first month of the autumn in La Verne, is still a hot month, with an average temperature fluctuating between 63.5°F (17.5°C) and 86.9°F (30.5°C).

Temperature

La Verne experiences a recorded average high-temperature of a still tropical 86.9°F (30.5°C) in September, closely aligned with August's 89.8°F (32.1°C). Despite a stark disparity with daily highs, La Verne records an average nighttime temperature of 63.5°F (17.5°C) in September.

Heat index

During September, the heat index is evaluated at a hot 87.8°F (31°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.
Heat index data is primarily for areas with shade and subjected to light winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.

Humidity

In La Verne, the average relative humidity in September is 46%.

Rainfall

In La Verne, California, in September, it is raining for 2.1 days, with typically 0.08" (2mm) of accumulated precipitation. In La Verne, during the entire year, the rain falls for 42.4 days and collects up to 4.72" (120mm) of precipitation.

Snowfall

January, March through December are months without snowfall.

Daylight

The average length of the day in September in La Verne is 12h and 22min.
On the first day of the month, sunrise is at 6:25 am and sunset at 7:16 pm. On the last day of September, in La Verne, sunrise is at 6:45 am and sunset at 6:36 pm PDT.

Sunshine

The average sunshine in September is 10.8h.

UV index

In La Verne, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: An average UV index of 6 in September transforms into this advice:
Deter overexposure. Protecting against the sun's effects is essential. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

How hot does it get in La Verne in September?

The average high-temperature and low-temperature during September are 86.9°F (30.5°C) and 63.5°F (17.5°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in September is evaluated at 87.8°F (31°C).

What is the average humidity in September in La Verne?

The average relative humidity in September in La Verne is 46%.

How many days does it rain in September in La Verne?

In La Verne, California, during September, the rain falls for 2.1 days and regularly aggregates up to 0.08" (2mm) of precipitation.

When it does not snow in La Verne?

January, March through December are months without snowfall.

How many hours of daylight does La Verne have in September?

In September, the average day length in La Verne is 12h and 22min.

When is the sunrise / sunset in September in La Verne?

In September, on the first day of the month, sunrise is at 6:25 am and sunset at 7:16 pm. On the last day of the month, in La Verne, sunrise is at 6:45 am and sunset at 6:36 pm PDT.

How long on average sun shines in September in La Verne?

In La Verne, California, the average sunshine duration in September is 10.8h.

What is the UV index reading in September in La Verne?

In La Verne, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
La Verne, CA

Average temperature in September - La Verne, CA
  • Average high temperature in September: 86.9°F

The warmest month (with the highest average high temperature) is August (89.8°F).
The month with the lowest average high temperature is December (62.4°F).

  • Average low temperature in September: 63.5°F

The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (46°F).

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Average pressure in September
La Verne, CA

Average pressure in September - La Verne, CA
  • Average pressure in September: 29.88"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in September
La Verne, CA

Average wind speed in September - La Verne, CA
  • Average wind speed in September: 4.3mph

The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).

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Average humidity in September
La Verne, CA

Average humidity in September - La Verne, CA
  • Average humidity in September: 46%

The months with the highest relative humidity are March and May (55%).
The months with the lowest relative humidity are August and November (45%).

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Average rainfall in September
La Verne, CA

Average rainfall in September - La Verne, CA
  • Average rainfall in September: 0.08"

The wettest month (with the highest rainfall) is February (1.02").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in September
La Verne, CA

Average rainfall days in September - La Verne, CA
  • Average rainfall days in September: 2.1 days

The month with the highest number of rainy days is March (6.1 days).
The month with the least rainy days is June (1 days).

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Average snowfall days in September
La Verne, CA

Average snowfall days in September - La Verne, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in September /
Average sunshine in September
La Verne, CA

Average daylight in September / Average sunshine in September - La Verne, 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 June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).

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Average sunshine days in September
La Verne, CA

Average sunshine days in September - La Verne, CA
  • Average sunshine days in September: 25.7 days

The month with the most sunshine days is June (28.2 days).
The month with the least sunshine days is February (22.8 days).

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Average UV index in September
La Verne, CA

Average UV index in September - La Verne, CA
  • Average UV index in September: 6

The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in September
La Verne, CA

Average cloud cover in September - La Verne, CA
  • Average cloud cover in September: 6

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in September
La Verne, CA

Average visibility in September - La Verne, 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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La Verne, California, USA

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