September weather forecast and climate
Redding, CA

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

Temperature

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

Humidity

In September, the average relative humidity is 37%.

Rainfall

In September, the rain falls for 3.5 days. Throughout September, 0.28" (7mm) of precipitation is accumulated. Throughout the year, there are 92.2 rainfall days, and 20.16" (512mm) of precipitation is accumulated.

Snowfall

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

Daylight

In Redding, the average length of the day is 12.4h.

Sunshine

The average sunshine in September is 11.1h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Redding?

In Redding, California, in September, the average high-temperature is 86°F (30°C), and the average low-temperature is 57.7°F (14.3°C).

What is the average humidity in September in Redding?

The average relative humidity in September in Redding is 37%.

How much does it rain in Redding in September?

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 length of the day is 12.4h.

How many hours of sunshine does Redding have in September?

In Redding, California, 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 in Redding is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.
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).

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

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

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).

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%).

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").

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).

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

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

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).

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).

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).

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).

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).

Average visibility in September - Redding, CA
  • Average visibility in September: 6mi

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