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
The commencement of September notes an average high-temperature of a still moderately hot 77.9°F (25.5°C), exhibiting little difference from the previous month. Throughout September, Topanga anticipates an average low-temperature of 63.9°F (17.7°C).Humidity
In September, the average relative humidity in Topanga is 64%.Rainfall
In September, the rain falls for 3.2 days. Throughout September, 0.2" (5mm) of precipitation is accumulated. In Topanga, during the entire year, the rain falls for 50.3 days and collects up to 7.87" (200mm) of precipitation.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:19 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:39 pm PDT.
Sunshine
In September, the average sunshine is 10.6h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 6 during September leads to these instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. 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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
How many hours of daylight does Topanga have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
When is the highest UV index?
What is the UV index intensity in September?
Average temperature in September
Topanga, CA
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is August (78.8°F).
The month with the lowest average high temperature is December (62.2°F).
- Average low temperature in September: 63.9°F
The month with the highest average low temperature is September (63.9°F).
The coldest month (with the lowest average low temperature) is February (50.5°F).
Average pressure in September
Topanga, CA
- Average pressure in September: 29.9"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.9"Hg).
Average wind speed in September
Topanga, CA
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Topanga, CA
- Average humidity in September: 64%
The month with the highest relative humidity is June (72%).
The month with the lowest relative humidity is November (54%).
Average rainfall in September
Topanga, CA
- Average rainfall in September: 0.2"
The wettest month (with the highest rainfall) is January (1.69").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Topanga, CA
- Average rainfall days in September: 3.2 days
The month with the highest number of rainy days is March (7 days).
The month with the least rainy days is August (2.4 days).
Average daylight in September /
Average sunshine in September
Topanga, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 42min).
Average sunshine days in September
Topanga, CA
- Average sunshine days in September: 24.2 days
The month with the most sunshine days is October (26 days).
The month with the least sunshine days is February (22.1 days).
Average UV index in September
Topanga, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Topanga, CA
- Average cloud cover in September: 11
The month with the most cloud cover is March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in September
Topanga, 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).
Topanga, California, USA
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