September weather forecast
La Grange, CA

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Weather in September

The first month of the autumn, September, is still a tropical month in La Grange, California, with an average temperature fluctuating between 60.8°F (16°C) and 90°F (32.2°C).

Temperature

The arrival of September corresponds with a light shift in temperature, down from a fiery hot 96.3°F (35.7°C) in August to a tropical 90°F (32.2°C). The month of September sees a significant daily temperature drop, recording an average low-temperature of 60.8°F (16°C).

Humidity

The average relative humidity in September is 38%.

Rainfall

In September, the rain falls for 1.7 days. Throughout September, 0.08" (2mm) of precipitation is accumulated. Throughout the year, there are 47.2 rainfall days, and 5" (127mm) of precipitation is accumulated.

Daylight

In La Grange, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:32 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:45 pm PDT.

Sunshine

In La Grange, the average sunshine in September is 11.5h.

UV index

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: In September, a daily UV index of 6 turns into the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

In September, the average high-temperature and low-temperature in La Grange are 90°F (32.2°C) and 60.8°F (16°C) respectively. In June, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is estimated at 91.4°F (33°C).

What is the average humidity in September in La Grange?

In September, the average relative humidity in La Grange is 38%.

How many days does it rain in September?

In La Grange, in September, it is raining for 1.7 days, with typically 0.08" (2mm) of accumulated precipitation.

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

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

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:32 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:45 pm PDT.

How long on average sun shines in September?

In September, the average sunshine duration is 11.5h.

What is the UV index reading in September?

The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from 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
La Grange, CA

Average temperature in September - La Grange, CA
  • Average high temperature in September: 90°F

The warmest month (with the highest average high temperature) is July (97.3°F).
The month with the lowest average high temperature is December (55.6°F).

  • Average low temperature in September: 60.8°F

The months with the highest average low temperature are July and August (63°F).
The coldest month (with the lowest average low temperature) is December (40.6°F).

Average pressure in September
La Grange, CA

Average pressure in September - La Grange, CA
  • Average pressure in September: 29.93"Hg

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

Average wind speed in September
La Grange, CA

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

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).

Average humidity in September
La Grange, CA

Average humidity in September - La Grange, CA
  • Average humidity in September: 38%

The month with the highest relative humidity is January (71%).
The month with the lowest relative humidity is July (35%).

Average rainfall in September
La Grange, CA

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

The wettest months (with the highest rainfall) are March and December (0.98").
The driest months (with the least rainfall) are June and August (0.04").

Average rainfall days in September
La Grange, CA

Average rainfall days in September - La Grange, CA
  • Average rainfall days in September: 1.7 days

The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (0.6 days).

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

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

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 11h and 3min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).

Average sunshine days in September
La Grange, CA

Average sunshine days in September - La Grange, CA
  • Average sunshine days in September: 27.1 days

The month with the most sunshine days is August (29 days).
The month with the least sunshine days is February (21.7 days).

Average UV index in September
La Grange, CA

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

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in September
La Grange, CA

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

The months with the most cloud cover are March and December (Cloud cover 32).
The month with the least cloud cover is July (Cloud cover 4).

Average visibility in September
La Grange, CA

Average visibility in September - La Grange, 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).

La Grange, California, USA

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