Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
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.
FAQ
What are September temperatures in Redwood Shores?
What is the average humidity in September in Redwood Shores?
How many days does it rain in September in Redwood Shores?
What is the average length of the day in September in Redwood Shores?
What time are sunrise and sunset in September in Redwood Shores?
How long on average sun shines in September in Redwood Shores?
What is the month with the highest UV index in Redwood Shores?
What is the UV index reading in September in Redwood Shores?
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).
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).
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).
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%).
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").
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).
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).
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).
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).
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).
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).
Redwood Shores, California, USA
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