September weather forecast
Big Bend, CA

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Weather in September

September, the first month of the autumn in Big Bend, is still a warm month, with an average temperature ranging between min 46.8°F (8.2°C) and max 77.9°F (25.5°C).

Temperature

Big Bend's September weather features a light decline in high-temperatures, reducing from a warm 85.1°F (29.5°C) in August to a still moderately hot 77.9°F (25.5°C). During September, Big Bend's temperature records a considerable difference from its daily highs to an average low of 46.8°F (8.2°C).

Humidity

In Big Bend, the average relative humidity in September is 48%.

Rainfall

In Big Bend, in September, it is raining for 4.6 days, with typically 0.47" (12mm) of accumulated precipitation. Throughout the year, in Big Bend, there are 110.4 rainfall days, and 28.62" (727mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Big Bend.

Daylight

The average length of the day in September is 12h and 27min.
On the first day of September, sunrise is at 6:35 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:50 pm PDT.

Sunshine

The average sunshine in September is 11h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 4 during September leads to these instructions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
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Frequently asked questions

What is the usual temperature for Big Bend in September?

During September, Big Bend experiences an average high-temperature of 77.9°F (25.5°C) and a low-temperature of 46.8°F (8.2°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is estimated at 84.2°F (29°C).

What is the average humidity in September in Big Bend?

In Big Bend, California, the average relative humidity in September is 48%.

How much does it rain in Big Bend in September?

In September, in Big Bend, California, the rain falls for 4.6 days. Throughout September, 0.47" (12mm) of precipitation is accumulated.

When it does not snow in Big Bend?

In Big Bend, snow does not fall in June through September.

Does it snow in Big Bend in September?

In Big Bend, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Big Bend?

The average day length in September in Big Bend is 12h and 27min.

When are sunrise and sunset in September in Big Bend?

On the first day of September in Big Bend, California, sunrise is at 6:35 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:50 pm PDT.

How many hours of sunshine does Big Bend have in September?

In Big Bend, the average sunshine duration in September is 11h.

What is the UV index intensity in September in Big Bend?

The average daily maximum UV index in September in Big Bend is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Big Bend, CA

Average temperature in September - Big Bend, CA
  • Average high temperature in September: 77.9°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is December (42.3°F).

  • Average low temperature in September: 46.8°F

The month with the highest average low temperature is July (52.3°F).
The coldest month (with the lowest average low temperature) is December (27.5°F).

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Average pressure in September
Big Bend, CA

Average pressure in September - Big Bend, CA
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).

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Average wind speed in September
Big Bend, CA

Average wind speed in September - Big Bend, CA
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is March (5.7mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in September
Big Bend, CA

Average humidity in September - Big Bend, CA
  • Average humidity in September: 48%

The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is August (43%).

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Average rainfall in September
Big Bend, CA

Average rainfall in September - Big Bend, CA
  • Average rainfall in September: 0.47"

The wettest month (with the highest rainfall) is March (5.08").
The driest months (with the least rainfall) are July and August (0.28").

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Average rainfall days in September
Big Bend, CA

Average rainfall days in September - Big Bend, CA
  • Average rainfall days in September: 4.6 days

The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (2.5 days).

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Average snowfall in September
Big Bend, CA

Average snowfall in September - Big Bend, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (13.39").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Big Bend, CA

Average snowfall days in September - Big Bend, CA
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is March (7.8 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in September /
Average sunshine in September
Big Bend, CA

Average daylight in September / Average sunshine in September - Big Bend, CA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in September: 11h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

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Average sunshine days in September
Big Bend, CA

Average sunshine days in September - Big Bend, CA
  • Average sunshine days in September: 23.9 days

The month with the most sunshine days is August (25.5 days).
The month with the least sunshine days is March (10.9 days).

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Average UV index in September
Big Bend, CA

Average UV index in September - Big Bend, CA
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Big Bend, CA

Average cloud cover in September - Big Bend, CA
  • Average cloud cover in September: 12

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in September
Big Bend, CA

Average visibility in September - Big Bend, CA
  • Average visibility in September: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).

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Big Bend, California, USA

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