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 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 marks a gentle change in average high-temperature, declining from August's torrid 99.9°F (37.7°C) to a tropical 92.7°F (33.7°C). Despite the hot September days, San Joaquin's nights see an average temperature plunge to a comfortable 63.5°F (17.5°C).Humidity
In San Joaquin, the average relative humidity in September is 34%.Rainfall
June through September are months with the least rain in San Joaquin when the rain falls for 0.5 days and typically aggregates up to 0.04" (1mm) of rain.Daylight
In San Joaquin, the average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:45 pm PDT.
Sunshine
The average sunshine in September in San Joaquin is 11.3h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily UV index of 6 turns into the following recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
How hot does it get in San Joaquin in September?
What is the average humidity in September in San Joaquin?
What is the driest month in San Joaquin?
How many days does it rain in September in San Joaquin?
What is the average length of the day in September in San Joaquin?
When is the sunrise / sunset in September in San Joaquin?
How many hours of sunshine does San Joaquin have in September?
What is the UV index reading in September in San Joaquin?
Average temperature in September
San Joaquin, CA
- Average high temperature in September: 92.7°F
The warmest month (with the highest average high temperature) is July (100.9°F).
The month with the lowest average high temperature is December (56.5°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is December (42.6°F).
Average pressure in September
San Joaquin, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
San Joaquin, CA
- Average wind speed in September: 6.1mph
The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is January (5.1mph).
Average humidity in September
San Joaquin, CA
- Average humidity in September: 34%
The months with the highest relative humidity are January and December (66%).
The month with the lowest relative humidity is July (30%).
Average rainfall in September
San Joaquin, CA
- Average rainfall in September: 0.04"
The wettest months (with the highest rainfall) are February and March (0.43").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days in September
San Joaquin, CA
- Average rainfall days in September: 0.5 days
The month with the highest number of rainy days is March (7 days).
The months with the least rainy days are August and September (0.5 days).
Average daylight in September /
Average sunshine in September
San Joaquin, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The months with the least sunshine are February and December (Average sunshine: 6h and 24min).
Average sunshine days in September
San Joaquin, CA
- Average sunshine days in September: 28.9 days
The month with the most sunshine days is August (29.7 days).
The month with the least sunshine days is February (22 days).
Average UV index in September
San Joaquin, CA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in September
San Joaquin, CA
- Average cloud cover in September: 5
The month with the most cloud cover is March (Cloud cover 29).
The months with the least cloud cover are July and August (Cloud cover 4).
Average visibility in September
San Joaquin, 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).
San Joaquin, California, USA
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