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 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
With the advent of September, Folsom experiences an average high-temperature of a still tropical 87.4°F (30.8°C), mirroring a close resemblance to the previous month. Folsom records a marked daily temperature contrast, with an average low-temperature of 58.5°F (14.7°C) during the nights of September.Heat index
September's average heat index is computed to be a hot 87.8°F (31°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.Know that the heat index computations account for shaded terrains and slight winds. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Humidity
In Folsom, California, the average relative humidity in September is 42%.Rainfall
In September, the rain falls for 2.1 days. Throughout September, 0.2" (5mm) of precipitation is accumulated. In Folsom, during the entire year, the rain falls for 70.2 days and collects up to 13.43" (341mm) of precipitation.Snowfall
In Folsom, snow does not fall in January through November.Daylight
In September, the average length of the day in Folsom is 12h and 25min.On the first day of September, sunrise is at 6:34 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:48 pm PDT.
Sunshine
In Folsom, the average sunshine in September is 11.3h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, the UV index of 5 transforms into the following advice:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
How hot is it in Folsom in September?
What is the average humidity in September in Folsom?
How much does it rain in Folsom in September?
When it does not snow in Folsom?
How many hours of daylight does Folsom have in September?
When are sunrise and sunset in September in Folsom?
How many hours of sunshine does Folsom have in September?
How high is the UV index in September in Folsom?
Average temperature in September
Folsom, CA
- Average high temperature in September: 87.4°F
The warmest month (with the highest average high temperature) is July (93.7°F).
The month with the lowest average high temperature is December (54°F).
- Average low temperature in September: 58.5°F
The month with the highest average low temperature is August (59.9°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).
Average pressure in September
Folsom, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Folsom, CA
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is February (5.5mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in September
Folsom, CA
- Average humidity in September: 42%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (41%).
Average rainfall in September
Folsom, CA
- Average rainfall in September: 0.2"
The wettest month (with the highest rainfall) is March (2.48").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Folsom, CA
- Average rainfall days in September: 2.1 days
The month with the highest number of rainy days is March (12.9 days).
The month with the least rainy days is July (1.2 days).
Average snowfall in September
Folsom, CA
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Folsom, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.2 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
Folsom, CA
- Average daylight in September: 12h and 2min
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 2min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Folsom, CA
- Average sunshine days in September: 27.1 days
The month with the most sunshine days is July (29.1 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in September
Folsom, 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
Folsom, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Folsom, 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).
Folsom, California, USA
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