September weather forecast and climate
Redding, CA

Weather in September

September, the first month of the autumn, in Redding, is still a tropical month, with average temperature fluctuating between 57.7°F (14.3°C) and 86°F (30°C).

Temperature

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

Humidity

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

Rainfall

In Redding, during 3.5 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. Throughout the year, there are 92.2 rainfall days, and 20.16" (512mm) of precipitation is accumulated.

Snowfall

January, April through November are months without snowfall in Redding.

Daylight

The average length of the day in September is 12.4h.

Sunshine

In Redding, the average sunshine in September is 11.1h.

UV index

In Redding, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Redding, California, the average relative humidity in September is 37%.

How much does it rain in Redding in September?

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

When it does not snow in Redding?

January, April through November are months without snowfall in Redding.

How many hours of daylight does Redding have in September?

The average length of the day in September in Redding, California, is 12.4h.

How long on average sun shines in September in Redding?

In Redding, the average sunshine in September is 11.1h.

How high is the UV index in September in Redding?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.

Average temperature in September
Redding, CA

Average temperature in September - Redding, CA
  • Average high temperature in September: 30°C

The warmest month (with the highest average high temperature) is July (34.8°C).
The month with the lowest average high temperature is December (10.5°C).

  • Average low temperature in September: 14.3°C

The month with the highest average low temperature is July (16.9°C).
The coldest month (with the lowest average low temperature) is December (2.6°C).

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Average pressure in September
Redding, CA

Average pressure in September - Redding, CA
  • Average pressure in September: 1013.8mbar

The month with the highest atmospheric pressure is January (1021.5mbar).
Months with the lowest atmospheric pressure are June and August (1013.2mbar).

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Average wind speed in September
Redding, CA

Average wind speed in September - Redding, CA
  • Average wind speed in September: 7.6km/h

The windiest month (with the highest average wind speed) is March (8.4km/h).
The calmest months (with the lowest average wind speed) are August and November (7km/h).

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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: 7mm

The wettest month (with the highest rainfall) is March (100mm).
The driest month (with the least rainfall) is July (2mm).

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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: 0mm

The month with the highest snowfall is December (8mm).
Months with the least snowfall are January, April, May, June, July, August, September, October and November (0mm).

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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).
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: 12.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • 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

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).
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: 10km

Months with the highest visibility are May, June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March, April, November and December (9km).

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