September weather forecastFoothill Farms, CA
September
Weather in September
September, the first month of the autumn in Foothill Farms, is still a tropical month, with an average temperature ranging between min 59.4°F (15.2°C) and max 88.7°F (31.5°C).Temperature
September reports an average high-temperature of a still hot 88.7°F (31.5°C), slightly varied from August's 93.4°F (34.1°C). Foothill Farms observes a noteworthy temperature drop from the daily highs during September nights, with a mean temperature of 59.4°F (15.2°C).Heat index
For September, the heat index is computed to be a hot 89.6°F (32°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.In terms of the heat index, values are set with light wind and shade conditions in mind. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', offers an insight into how hot it feels when we factor in moisture content. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
The months with the lowest humidity are July and September, with an average relative humidity of 43%.Rainfall
In Foothill Farms, in September, it is raining for 2.1 days, with typically 0.16" (4mm) of accumulated precipitation. In Foothill Farms, during the entire year, the rain falls for 75.8 days and collects up to 16.65" (423mm) of precipitation.Snowfall
In Foothill Farms, snow does not fall in January through November.Daylight
The average length of the day in September in Foothill Farms, California, is 12h and 25min.On the first day of September in Foothill Farms, sunrise is at 6:35 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:49 pm PDT.
Sunshine
In September, the average sunshine in Foothill Farms is 11.2h.UV index
The average daily maximum UV index in September in Foothill Farms is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Foothill Farms, CA
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is December (54.1°F).
- Average low temperature in September: 59.4°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (41°F).
Average pressure in September
Foothill Farms, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Foothill Farms, CA
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is February (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).
Average humidity in September
Foothill Farms, CA
- Average humidity in September: 43%
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are July and September (43%).
Average rainfall in September
Foothill Farms, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is March (3.11").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Foothill Farms, CA
- Average rainfall days in September: 2.1 days
The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is August (0.8 days).
Average snowfall days in September
Foothill Farms, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Foothill Farms, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 12min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Foothill Farms, CA
- Average sunshine days in September: 27.1 days
The month with the most sunshine days is August (30 days).
The month with the least sunshine days is March (16.3 days).
Average UV index in September
Foothill Farms, 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
Foothill Farms, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Foothill Farms, 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).
