Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September brings a minor shift in the average high-temperature, adjusting from a scorching 107.2°F (41.8°C) in August to a fiery hot 100.2°F (37.9°C). Brawley's September nights cool down to an average low-temperature of 80.2°F (26.8°C).Humidity
In Brawley, the average relative humidity in September is 26%.Rainfall
In Brawley, in September, during 4 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, there are 31.2 rainfall days, and 3.27" (83mm) of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September, sunrise is at 6:17 am and sunset at 7:06 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 6:27 pm PDT.
Sunshine
In Brawley, the average sunshine in September is 10.2h.UV index
In Brawley, the average daily maximum UV index in September is 8. A UV Index value of 8 to 10 symbolizes a very high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 8 suggests these recommendations:
Immediate precautions are necessary; otherwise, skin and eyes might get damaged quickly. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How much does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Brawley have in September?
How high is the UV index in September?
Average temperature in September
Brawley, CA
- Average high temperature in September: 100.2°F
The warmest months (with the highest average high temperature) are July and August (107.2°F).
The month with the lowest average high temperature is December (67.3°F).
- Average low temperature in September: 80.2°F
The month with the highest average low temperature is August (85.6°F).
The coldest months (with the lowest average low temperature) are January and December (50.4°F).
Average pressure in September
Brawley, CA
- Average pressure in September: 29.81"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.78"Hg).
Average wind speed in September
Brawley, CA
- Average wind speed in September: 6.5mph
The windiest months (with the highest average wind speed) are April and May (8.1mph).
The calmest month (with the lowest average wind speed) is January (5.5mph).
Average humidity in September
Brawley, CA
- Average humidity in September: 26%
The month with the highest relative humidity is December (40%).
The month with the lowest relative humidity is June (22%).
Average rainfall in September
Brawley, CA
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is July (0.67").
The driest month (with the least rainfall) is May (0.04").
Average rainfall days in September
Brawley, CA
- Average rainfall days in September: 4 days
The month with the highest number of rainy days is July (6.4 days).
The month with the least rainy days is May (0.8 days).
Average daylight in September /
Average sunshine in September
Brawley, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 1min
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: 7h and 0min).
Average sunshine days in September
Brawley, CA
- Average sunshine days in September: 24.5 days
The month with the most sunshine days is May (30.1 days).
The month with the least sunshine days is August (21.6 days).
Average UV index in September
Brawley, CA
- Average UV index in September: 8
The months with the highest UV index are July and August (UV index 9).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in September
Brawley, CA
- Average cloud cover in September: 7
The month with the most cloud cover is December (Cloud cover 18).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in September
Brawley, 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).
Brawley, California, USA
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