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 snowfall in September
- Average snowfall 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
Ravendale's transition into September involves a gentle shift in temperature, receding from 82°F (27.8°C) in August to a still moderately hot 74.3°F (23.5°C). The nighttime temperature during September displays a significant divergence from daily peaks, averaging at a chilly 45.9°F (7.7°C).Humidity
In September, the average relative humidity in Ravendale is 41%.Rainfall
In Ravendale, in September, during 3.8 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. In Ravendale, during the entire year, the rain falls for 73 days and collects up to 12.17" (309mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.12" (3mm) of snow. In Ravendale, during the entire year, snow falls for 66 days and aggregates up to 54.69" (1389mm) of snow.Daylight
In September, the average length of the day is 12h and 27min.On the first day of September, sunrise is at 6:29 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:44 pm PDT.
Sunshine
The average sunshine in September is 11.3h.UV index
In Ravendale, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 4 during September translates into these guidelines:
Make use of precautions - Suggestions to resist sunburn are communicated. Around midday, solar radiation is most harmful; hence, exposure should be limited. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When does it start to snow?
How many hours of daylight does Ravendale have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Ravendale have in September?
What is the UV index reading in September?
Average temperature in September
Ravendale, CA
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in September: 45.9°F
The month with the highest average low temperature is July (51.4°F).
The coldest month (with the lowest average low temperature) is December (22.3°F).
Average pressure in September
Ravendale, CA
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Ravendale, CA
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Ravendale, CA
- Average humidity in September: 41%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (35%).
Average rainfall in September
Ravendale, CA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is March (2.01").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in September
Ravendale, CA
- Average rainfall days in September: 3.8 days
The month with the highest number of rainy days is March (10.4 days).
The month with the least rainy days is August (2.2 days).
Average snowfall in September
Ravendale, CA
- Average snowfall in September: 0.12"
The month with the highest snowfall is December (12.91").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Ravendale, CA
- Average snowfall days in September: 0.3 days
The months with the highest number of snowfall days are March and December (12.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Ravendale, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 11h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in September
Ravendale, CA
- Average sunshine days in September: 25.9 days
The months with the most sunshine days are July and August (27.3 days).
The month with the least sunshine days is March (12.8 days).
Average UV index in September
Ravendale, CA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Ravendale, CA
- Average cloud cover in September: 10
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 7).
Average visibility in September
Ravendale, CA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Ravendale, California, USA
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