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 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
September implies a soft temperature shift, with average high-temperatures reducing from August's sweltering 98.2°F (36.8°C) to a hot 92.3°F (33.5°C). The nighttime temperature during September displays a significant divergence from daily peaks, averaging at a refreshing 62.4°F (16.9°C).Humidity
In September, the average relative humidity is 34%.Rainfall
In Buttonwillow, in September, it is raining for 1.4 days, with typically 0.08" (2mm) of accumulated precipitation. Throughout the year, there are 51.3 rainfall days, and 7.01" (178mm) of precipitation is accumulated.Snowfall
In Buttonwillow, snow does not fall in March through December.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:42 pm PDT.
Sunshine
In Buttonwillow, the average sunshine in September is 11.1h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 6 during September leads to these instructions:
Shield from overexposure. Defense against sun-related harm is required. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September in Buttonwillow?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Buttonwillow, CA
- Average high temperature in September: 92.3°F
The warmest month (with the highest average high temperature) is July (99.5°F).
The month with the lowest average high temperature is December (58.8°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure in September
Buttonwillow, CA
- Average pressure in September: 29.9"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Buttonwillow, CA
- Average wind speed in September: 4.3mph
The windiest months (with the highest average wind speed) are June and July (5mph).
The calmest months (with the lowest average wind speed) are November and December (3.7mph).
Average humidity in September
Buttonwillow, CA
- Average humidity in September: 34%
The months with the highest relative humidity are January and December (61%).
The month with the lowest relative humidity is August (30%).
Average rainfall in September
Buttonwillow, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is March (1.22").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in September
Buttonwillow, CA
- Average rainfall days in September: 1.4 days
The month with the highest number of rainy days is March (8.9 days).
The month with the least rainy days is August (0.8 days).
Average snowfall days in September
Buttonwillow, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Buttonwillow, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 11h and 1min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in September
Buttonwillow, CA
- Average sunshine days in September: 27.6 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is February (20.7 days).
Average UV index in September
Buttonwillow, CA
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Buttonwillow, CA
- Average cloud cover in September: 5
The month with the most cloud cover is March (Cloud cover 28).
The months with the least cloud cover are July, August and September (Cloud cover 5).
Average visibility in September
Buttonwillow, CA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Buttonwillow, California, USA
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