September weather forecast
Brawley, CA

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Weather in September

September, the first month of the autumn in Brawley, is also a fiery hot month, with an average temperature fluctuating between 80.2°F (26.8°C) and 100.2°F (37.9°C).

Temperature

September is marked by a subtle drop in average high-temperatures, transitioning from a scorching 107.2°F (41.8°C) in August to a very hot 100.2°F (37.9°C). Brawley's average low-temperature for the month of September records at a warm 80.2°F (26.8°C).

Humidity

The average relative humidity in September in Brawley is 26%.

Rainfall

In Brawley, during September, the rain falls for 4 days and regularly aggregates up to 0.43" (11mm) of precipitation. In Brawley, during the entire year, the rain falls for 31.2 days and collects up to 3.27" (83mm) of precipitation.

Daylight

In Brawley, the average length of the day in September is 12h and 22min.
On the first day of the month, sunrise is at 6:17 am and sunset at 7:06 pm. On the last day of September, sunrise is at 6:36 am and sunset at 6:27 pm PDT.

Sunshine

In September, the average sunshine is 10.2h.

UV index

In September, the average daily maximum UV index is 8. A UV Index of 8 to 10 symbolizes a very high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum high UV index of 8 in September translates into the following recommendations:
Stay protected; otherwise, skin and eyes can suffer rapid damage. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
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Frequently asked questions

How hot is it in Brawley in September?

The average high-temperature and low-temperature in Brawley during September are 100.2°F (37.9°C) and 80.2°F (26.8°C) respectively.

What is the average humidity in September in Brawley?

In September, the average relative humidity in Brawley is 26%.

How much does it rain in Brawley in September?

In September, the rain falls for 4 days. Throughout September, 0.43" (11mm) of precipitation is accumulated.

What is the average length of the day in September in Brawley?

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

When is the sunrise / sunset in September in Brawley?

In September, on the first day of the month, sunrise is at 6:17 am and sunset at 7:06 pm. On the last day of the month, in Brawley, sunrise is at 6:36 am and sunset at 6:27 pm PDT.

How long on average sun shines in September in Brawley?

The average sunshine duration in September is 10.2h.

What is the UV index reading in September in Brawley?

In Brawley, the average daily maximum UV index in September is 8. A UV Index of 8 to 10 symbolizes a very high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Brawley, CA

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).

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Average pressure in September
Brawley, CA

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).

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Average wind speed in September
Brawley, CA

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).

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Average humidity in September
Brawley, CA

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%).

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Average rainfall in September
Brawley, CA

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").

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Average rainfall days in September
Brawley, CA

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).

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

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).

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Average sunshine days in September
Brawley, CA

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).

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Average UV index in September
Brawley, CA

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).

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Average cloud cover in September
Brawley, CA

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).

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Average visibility in September
Brawley, CA

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).

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Brawley, California, USA

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