September weather forecastCassel, CA
September
Weather in September
September, the first month of the autumn in Cassel, is also a moderately hot month, with temperature in the range of an average high of 78.8°F (26°C) and an average low of 48°F (8.9°C).Temperature
The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a warm 85.8°F (29.9°C) in August to a still moderately hot 78.8°F (26°C). Despite higher daytime temperatures, nighttime averages fall to a chilly 48°F (8.9°C) in September.Humidity
In Cassel, the average relative humidity in September is 45%.Rainfall
In Cassel, during September, the rain falls for 4.1 days and regularly aggregates up to 0.39" (10mm) of precipitation. In Cassel, during the entire year, the rain falls for 105 days and collects up to 24.69" (627mm) of precipitation.Snowfall
June through September are months without snowfall in Cassel.Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:38 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:49 pm PDT.
Sunshine
In Cassel, 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 vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cassel, CA
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is December (43.3°F).
- Average low temperature in September: 48°F
The month with the highest average low temperature is July (53.1°F).
The coldest month (with the lowest average low temperature) is December (27.9°F).
Average pressure in September
Cassel, CA
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in September
Cassel, CA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is March (5.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Cassel, CA
- Average humidity in September: 45%
The months with the highest relative humidity are January and March (79%).
The months with the lowest relative humidity are July and August (40%).
Average rainfall in September
Cassel, CA
- Average rainfall in September: 0.39"
The wettest month (with the highest rainfall) is March (4.45").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
Cassel, CA
- Average rainfall days in September: 4.1 days
The month with the highest number of rainy days is April (14.5 days).
The month with the least rainy days is August (2.3 days).
Average snowfall in September
Cassel, CA
- Average snowfall in September: 0"
The month with the highest snowfall is March (10.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Cassel, CA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is March (8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Cassel, CA
- Average daylight in September: 12h and 24min
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 6min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Cassel, CA
- Average sunshine days in September: 24.7 days
The month with the most sunshine days is August (26 days).
The month with the least sunshine days is March (11.3 days).
Average UV index in September
Cassel, 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
Cassel, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 6).
Average visibility in September
Cassel, CA
- Average visibility in September: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, March and December (5mi).
