September weather forecast
Redwood Shores, CA

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Weather in September

September, the first month of the autumn in Redwood Shores, is still a pleasant month, with an average temperature ranging between max 72.9°F and min 56.7°F.

Temperature

September's average high-temperature is a still pleasant 72.9°F, maintaining a close comparison with August's 73°F. Throughout September, an average low-temperature of 56.7°F is expected.

Humidity

The average relative humidity in September is 69%.

Rainfall

In September, in Redwood Shores, the rain falls for 2.8 days. Throughout September, 0.16" of precipitation is accumulated. In Redwood Shores, during the entire year, the rain falls for 77.5 days and collects up to 11.22" of precipitation.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:39 am and sunset at 7:38 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:54 pm PDT.

Sunshine

In Redwood Shores, the average sunshine in September is 11h.

UV index

June through September, with an average maximum UV index of 5, are months with the highest UV index in Redwood Shores. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 5 in September translates into the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.
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FAQ

What are September temperatures in Redwood Shores?

In September, the average high-temperature and low-temperature in Redwood Shores, California, are 72.9°F and 56.7°F respectively.

What is the average humidity in September in Redwood Shores?

In Redwood Shores, California, the average relative humidity in September is 69%.

How many days does it rain in September in Redwood Shores?

In Redwood Shores, during September, the rain falls for 2.8 days and regularly aggregates up to 0.16" of precipitation.

What is the average length of the day in September in Redwood Shores?

In September, the average day length in Redwood Shores, California, is 12h and 25min.

What time are sunrise and sunset in September in Redwood Shores?

In September, on the first day of the month, sunrise is at 6:39 am and sunset at 7:38 pm. On the last day of the month, in Redwood Shores, sunrise is at 7:03 am and sunset at 6:54 pm PDT.

How long on average sun shines in September in Redwood Shores?

The average sunshine duration in September in Redwood Shores, California, is 11h.

What is the month with the highest UV index in Redwood Shores?

June through September, with an average maximum UV index of 5, are months with the highest UV index in Redwood Shores.

What is the UV index reading in September in Redwood Shores?

In September, the average daily maximum UV index in Redwood Shores, California, is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Redwood Shores, CA

Average temperature in September - Redwood Shores, CA
  • Average high temperature in September: 72.9°F

The warmest month (with the highest average high temperature) is August (73°F).
The month with the lowest average high temperature is December (55.9°F).

  • Average low temperature in September: 56.7°F

The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is January (46°F).

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Average pressure in September
Redwood Shores, CA

Average pressure in September - Redwood Shores, CA
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).

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Average wind speed in September
Redwood Shores, CA

Average wind speed in September - Redwood Shores, CA
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is October (5.5mph).

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Average humidity in September
Redwood Shores, CA

Average humidity in September - Redwood Shores, CA
  • Average humidity in September: 69%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in September
Redwood Shores, CA

Average rainfall in September - Redwood Shores, CA
  • Average rainfall in September: 0.16"

The wettest month (with the highest rainfall) is February (2.09").
The driest months (with the least rainfall) are July and August (0.08").

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Average rainfall days in September
Redwood Shores, CA

Average rainfall days in September - Redwood Shores, CA
  • Average rainfall days in September: 2.8 days

The month with the highest number of rainy days is March (13 days).
The month with the least rainy days is July (1.8 days).

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Average daylight in September /
Average sunshine in September
Redwood Shores, CA

Average daylight in September / Average sunshine in September - Redwood Shores, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 11h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

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Average sunshine days in September
Redwood Shores, CA

Average sunshine days in September - Redwood Shores, CA
  • Average sunshine days in September: 23.9 days

The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is March (16.3 days).

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Average UV index in September
Redwood Shores, CA

Average UV index in September - Redwood Shores, CA
  • Average UV index in September: 5

The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).

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Average cloud cover in September
Redwood Shores, CA

Average cloud cover in September - Redwood Shores, CA
  • Average cloud cover in September: 12

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in September
Redwood Shores, CA

Average visibility in September - Redwood Shores, 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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Redwood Shores, California, USA

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