September weather forecastBrown, CA
September
Weather in September
September, the first month of the autumn in Brown, is also a moderately hot month, with an average temperature ranging between max 84.4°F (29.1°C) and min 64.4°F (18°C).Temperature
A mild drop in Brown's average high-temperature is observed in September, transitioning from a tropical 91°F (32.8°C) in August to a moderately hot 84.4°F (29.1°C). Brown experiences an average low-temperature of 64.4°F (18°C) in the month of September.Humidity
In Brown, the average relative humidity in September is 23%.Rainfall
In September, in Brown, the rain falls for 1.6 days. Throughout September, 0.08" (2mm) of precipitation is accumulated. Throughout the year, in Brown, there are 41.5 rainfall days, and 4.69" (119mm) of precipitation is accumulated.Snowfall
March through October and December are months without snowfall in Brown.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:18 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:35 pm PDT.
Sunshine
In September, the average sunshine is 10.9h.UV index
In Brown, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The daily maximum UV index of 5 in September interprets into the following advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Brown, CA
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is July (92.3°F).
The month with the lowest average high temperature is December (51.1°F).
- Average low temperature in September: 64.4°F
The month with the highest average low temperature is July (71.1°F).
The coldest month (with the lowest average low temperature) is December (35.6°F).
Average pressure in September
Brown, CA
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).
Average wind speed in September
Brown, CA
- Average wind speed in September: 7.2mph
The windiest months (with the highest average wind speed) are May and June (9.1mph).
The calmest month (with the lowest average wind speed) is January (5.7mph).
Average humidity in September
Brown, CA
- Average humidity in September: 23%
The month with the highest relative humidity is January (48%).
The month with the lowest relative humidity is August (20%).
Average rainfall in September
Brown, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is December (0.87").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Brown, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is June (0.8 days).
Average snowfall in September
Brown, CA
- Average snowfall in September: 0"
The month with the highest snowfall is November (0.87").
The months with the least snowfall are March, April, May, June, July, August, September, October and December (0").
Average snowfall days in September
Brown, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Brown, CA
- Average daylight in September: 12h and 24min
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: 10h and 54min
The months with the most sunshine are June and July (Average sunshine: 12h and 12min).
The months with the least sunshine are January and December (Average sunshine: 7h and 6min).
Average sunshine days in September
Brown, CA
- Average sunshine days in September: 27.3 days
The month with the most sunshine days is June (28.4 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in September
Brown, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Brown, CA
- Average cloud cover in September: 4
The months with the most cloud cover are January and March (Cloud cover 18).
The months with the least cloud cover are August and September (Cloud cover 4).
Average visibility in September
Brown, 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).
