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
The shift from August to September includes a small decrease in the average high-temperature, from a moderately hot 84.9°F (29.4°C) to a still warm 78.8°F (26°C). Compared to daytime temperatures, Storrie's temperature drops significantly, averaging a cool 50.5°F (10.3°C) during the nights of September.Humidity
The average relative humidity in September is 44%.Rainfall
In Storrie, during September, the rain falls for 4.3 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, there are 115.1 rainfall days, and 45.39" (1153mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 26min.On the first day of September in Storrie, sunrise is at 6:33 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:48 pm PDT.
Sunshine
In Storrie, California, the average sunshine in September is 11.1h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Undertake protective steps - Recommendations to avoid sunburn are issued. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Storrie, CA
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is December (29.3°F).
Average pressure in September
Storrie, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Storrie, CA
- Average wind speed in September: 5.6mph
The windiest months (with the highest average wind speed) are January and February (6.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Storrie, CA
- Average humidity in September: 44%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is July (39%).
Average rainfall in September
Storrie, CA
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is March (8.66").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
Storrie, CA
- Average rainfall days in September: 4.3 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is July (2.5 days).
Average snowfall in September
Storrie, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.38").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Storrie, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Storrie, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in September
Storrie, CA
- Average sunshine days in September: 25 days
The months with the most sunshine days are July and August (27.5 days).
The month with the least sunshine days is March (12 days).
Average UV index in September
Storrie, CA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Storrie, CA
- Average cloud cover in September: 11
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in September
Storrie, CA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is March (5mi).
Storrie, California, USA
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