September weather forecastFloriston, CA
September
Weather in September
September, the first month of the autumn in Floriston, is still a pleasant month, with an average temperature ranging between max 70°F (21.1°C) and min 44.1°F (6.7°C).Temperature
In Floriston, the average high-temperature in September gently drops from a moderately hot 75.9°F (24.4°C) in August to an agreeable 70°F (21.1°C). Floriston experiences a substantial decline from the daytime high temperatures in September, settling on an average low of 44.1°F (6.7°C).Humidity
In Floriston, the average relative humidity in September is 42%.Rainfall
In Floriston, California, in September, during 1.5 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. Throughout the year, in Floriston, there are 34.4 rainfall days, and 3.86" (98mm) of precipitation is accumulated.Snowfall
Months with snowfall in Floriston are January through June, September through December. September is the first month it typically snows in Floriston. Throughout September, in the average 0.6 snowfall days, it receives 0.2" (5mm) of snow. In Floriston, California, during the entire year, snow falls for 38.5 days and aggregates up to 10.51" (267mm) of snow.Daylight
In September, the average length of the day in Floriston is 12h and 26min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:43 pm PDT.
Sunshine
The average sunshine in September is 11.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Floriston, CA
- Average high temperature in September: 70°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is December (35.4°F).
- Average low temperature in September: 44.1°F
The month with the highest average low temperature is July (50.7°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).
Average pressure in September
Floriston, CA
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Floriston, CA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is March (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in September
Floriston, CA
- Average humidity in September: 42%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is August (37%).
Average rainfall in September
Floriston, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is December (0.63").
The driest months (with the least rainfall) are June, August and October (0.12").
Average rainfall days in September
Floriston, CA
- Average rainfall days in September: 1.5 days
The month with the highest number of rainy days is May (5.3 days).
The month with the least rainy days is November (1.3 days).
Average snowfall in September
Floriston, CA
- Average snowfall in September: 0.2"
The month with the highest snowfall is December (2.2").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Floriston, CA
- Average snowfall days in September: 0.6 days
The month with the highest number of snowfall days is December (7.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Floriston, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 11h and 6min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 48min).
Average sunshine days in September
Floriston, CA
- Average sunshine days in September: 27.4 days
The month with the most sunshine days is October (28.5 days).
The month with the least sunshine days is May (21.6 days).
Average UV index in September
Floriston, CA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Floriston, CA
- Average cloud cover in September: 10
The months with the most cloud cover are March and December (Cloud cover 38).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in September
Floriston, CA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
