September weather forecastGustine, CA
September
Weather in September
September, the first month of the autumn in Gustine, is also a hot month, with an average temperature varying between 59.9°F (15.5°C) and 90.3°F (32.4°C).Temperature
Entering September, Gustine's average high-temperature reads a hot 90.3°F (32.4°C), indicating a close resemblance to the previous month's climate. Gustine logs a notable disparity from the daily highs during September, as the nighttime temperature lowers to an average of 59.9°F (15.5°C).Heat index
The average heat index in September is calculated to be a hot 91.4°F (33°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.Note that heat index values are valued for light wind and location in the shade. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', joins air temperature with relative humidity to produce a temperature perception for humans. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Humidity
In September, the average relative humidity is 41%.Rainfall
The months with the least rainfall are June, August and September Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:48 pm PDT.
Sunshine
In September, the average sunshine is 11.5h.UV index
In Gustine, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Gustine, CA
- Average high temperature in September: 90.3°F
The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in September: 59.9°F
The months with the highest average low temperature are July and August (61.9°F).
The coldest month (with the lowest average low temperature) is December (41°F).
Average pressure in September
Gustine, 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 (29.91"Hg).
Average wind speed in September
Gustine, CA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is January (4.4mph).
Average humidity in September
Gustine, CA
- Average humidity in September: 41%
The month with the highest relative humidity is January (71%).
The month with the lowest relative humidity is July (38%).
Average rainfall in September
Gustine, CA
- Average rainfall in September: 0.04"
The wettest month (with the highest rainfall) is December (0.83").
The driest months (with the least rainfall) are June, August and September (0.04").
Average rainfall days in September
Gustine, CA
- Average rainfall days in September: 1.2 days
The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (0.7 days).
Average daylight in September /
Average sunshine in September
Gustine, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 11h and 30min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Gustine, CA
- Average sunshine days in September: 28.1 days
The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (22.3 days).
Average UV index in September
Gustine, CA
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Gustine, CA
- Average cloud cover in September: 6
The months with the most cloud cover are March and December (Cloud cover 31).
The months with the least cloud cover are July and August (Cloud cover 4).
Average visibility in September
Gustine, 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).
