September weather forecastLa Grange, CA
September
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 12h and 24min
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 30min
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: 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: 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: 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: 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).
