September weather forecast
Redding, CA

Weather in September

The first month of the autumn, September, is also a hot month in Redding, California, with an average temperature fluctuating between 86°F (30°C) and 57.7°F (14.3°C).

Temperature

In September, the average high-temperature marginally drops from a tropical 93.6°F (34.2°C) in August to a still hot 86°F (30°C). The average low-temperature, in September, is 57.7°F (14.3°C).

Humidity

In Redding, California, the average relative humidity in September is 37%.

Rainfall

In September, in Redding, the rain falls for 3.5 days. Throughout September, 0.28" (7mm) of precipitation is accumulated. In Redding, during the entire year, the rain falls for 92.2 days and collects up to 20.16" (512mm) of precipitation.

Snowfall

In Redding, California, snow does not fall in January, April through November.

Daylight

In Redding, the average length of the day in September is 12h and 26min.
On the first day of September in Redding, sunrise is at 6:37 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:53 pm PDT.

Sunshine

The average sunshine in September is 11.1h.

UV index

The average daily maximum UV index in September in Redding is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Redding?

In September, the average relative humidity in Redding, California, is 37%.

How many days does it rain in September in Redding?

In Redding, California, in September, during 3.5 rainfall days, 0.28" (7mm) of precipitation is typically accumulated.

When it does not snow in Redding?

In Redding, snow does not fall in January, April through November.

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

In September, the average day length is 12h and 26min.

When is the sunrise / sunset in September in Redding?

On the first day of September in Redding, sunrise is at 6:37 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:53 pm PDT.

How many hours of sunshine does Redding have in September?

The average sunshine duration in September is 11.1h.

How high is the UV index in September in Redding?

In September, the average daily maximum UV index in Redding, California, is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.

Average temperature in September
Redding, CA

Average temperature in September - Redding, CA
  • Average high temperature in September: 86°F

The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is December (50.9°F).

  • Average low temperature in September: 57.7°F

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is December (36.7°F).

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Average pressure in September
Redding, CA

Average pressure in September - Redding, CA
  • Average pressure in September: 29.94"

The month with the highest atmospheric pressure is January (30.16").
The months with the lowest atmospheric pressure are June and August (29.92").

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Average wind speed in September
Redding, CA

Average wind speed in September - Redding, CA
  • Average wind speed in September: 4.7mph

The windiest months (with the highest average wind speed) are March and October (5.2mph).
The calmest months (with the lowest average wind speed) are August and November (4.3mph).

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Average humidity in September
Redding, CA

Average humidity in September - Redding, CA
  • Average humidity in September: 37%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is August (33%).

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Average rainfall in September
Redding, CA

Average rainfall in September - Redding, CA
  • Average rainfall in September: 0.28"

The wettest month (with the highest rainfall) is March (3.94").
The driest month (with the least rainfall) is July (0.08").

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Average rainfall days in September
Redding, CA

Average rainfall days in September - Redding, CA
  • Average rainfall days in September: 3.5 days

The month with the highest number of rainy days is March (15.8 days).
The month with the least rainy days is August (1.3 days).

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Average snowfall in September
Redding, CA

Average snowfall in September - Redding, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is December (0.31").
The months with the least snowfall are January, April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Redding, CA

Average snowfall days in September - Redding, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are January, April, May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Redding, CA
  • Average daylight in September: 12h and 26min

The month with the longest days is June (Average daylight: 15h and 2min).
The month with the shortest days is December (Average daylight: 9h and 20min).

  • Average sunshine in September: 11.1h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.5h).

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Average sunshine days in September
Redding, CA

Average sunshine days in September - Redding, CA
  • Average sunshine days in September: 25.5 days

The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (13.5 days).

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Average UV index in September
Redding, CA

Average UV index in September - Redding, CA
  • Average UV index in September: 5

The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is February (UV index 2).

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Average cloud cover in September
Redding, CA

Average cloud cover in September - Redding, CA
  • Average cloud cover in September: 9

The month with the most cloud cover is March (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 5).

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Average visibility in September
Redding, CA

Average visibility in September - Redding, 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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