September weather forecastGreenville, CA
September
Weather in September
September, the first month of the autumn in Greenville, is also a moderately hot month, with temperature in the range of an average high of 75°F (23.9°C) and an average low of 43.9°F (6.6°C).Temperature
As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from 82.9°F (28.3°C) to a still warm 75°F (23.9°C). Greenville sees a major change from daytime highs, with the nighttime temperature dipping to a chilly 43.9°F (6.6°C) on average during September.Humidity
The average relative humidity in September in Greenville is 47%.Rainfall
In Greenville, California, in September, during 4.1 rainfall days, 0.39" (10mm) of precipitation is typically accumulated. Throughout the year, there are 91.7 rainfall days, and 23.19" (589mm) of precipitation is accumulated.Snowfall
In Greenville, snow does not fall in June through September.Daylight
In Greenville, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:32 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:47 pm PDT.
Sunshine
In September, the average sunshine in Greenville is 11.2h.UV index
In Greenville, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 4 suggests this advice:
Heed the precautions - It is counselled to guard against solar damage. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Greenville, CA
- Average high temperature in September: 75°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (39.2°F).
- Average low temperature in September: 43.9°F
The month with the highest average low temperature is July (49.1°F).
The coldest month (with the lowest average low temperature) is December (23.4°F).
Average pressure in September
Greenville, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Greenville, CA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is March (6.4mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Greenville, CA
- Average humidity in September: 47%
The months with the highest relative humidity are January and March (81%).
The month with the lowest relative humidity is July (41%).
Average rainfall in September
Greenville, CA
- Average rainfall in September: 0.39"
The wettest months (with the highest rainfall) are February and December (4.06").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in September
Greenville, CA
- Average rainfall days in September: 4.1 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is August (1.8 days).
Average snowfall in September
Greenville, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (13.07").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Greenville, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Greenville, CA
- Average daylight in September: 12h and 24min
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 12min
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 24min).
Average sunshine days in September
Greenville, CA
- Average sunshine days in September: 25.6 days
The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (12.3 days).
Average UV index in September
Greenville, 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
Greenville, CA
- Average cloud cover in September: 11
The month with the most cloud cover is March (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 6).
Average visibility in September
Greenville, CA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
