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
The unfolding of September shows an average high-temperature of a still moderately hot 80.8°F (27.1°C), indicating a slight variance from August's 84.7°F (29.3°C). Philo experiences a dramatic descent in temperature during September, with the average nighttime reading settling at a fresh 51.4°F (10.8°C).Heat index
For most parts of September, the heat index is evaluated at 82.4°F (28°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.In the scope of the heat index, its values resonate with shade and light wind conditions. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Humidity
The months with the lowest humidity in Philo are July and September, with an average relative humidity of 58%.Rainfall
In Philo, during September, the rain falls for 2.5 days and regularly aggregates up to 0.2" (5mm) of precipitation. In Philo, during the entire year, the rain falls for 83.3 days and collects up to 17.72" (450mm) of precipitation.Snowfall
In Philo, snow does not fall in January, March through December.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:43 pm. On the last day of September, in Philo, sunrise is at 7:09 am and sunset at 6:57 pm PDT.
Sunshine
In September, the average sunshine in Philo is 10.9h.UV index
The average daily maximum UV index in September in Philo is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Prioritize safety - Recommendations to avert sunburn are shared. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Philo in September?
What is the least humid month in Philo?
What is the average humidity in September in Philo?
How much does it rain in Philo in September?
When it does not snow in Philo?
How many hours of daylight does Philo have in September?
When are sunrise and sunset in September in Philo?
How many hours of sunshine does Philo have in September?
What is the UV index reading in September in Philo?
Average temperature in September
Philo, CA
- Average high temperature in September: 80.8°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (53.6°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is July (53.6°F).
The coldest month (with the lowest average low temperature) is December (37.4°F).
Average pressure in September
Philo, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in September
Philo, CA
- Average wind speed in September: 4.4mph
The windiest months (with the highest average wind speed) are April, May and June (5.5mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).
Average humidity in September
Philo, CA
- Average humidity in September: 58%
The month with the highest relative humidity is March (79%).
The months with the lowest relative humidity are July and September (58%).
Average rainfall in September
Philo, CA
- Average rainfall in September: 0.2"
The wettest months (with the highest rainfall) are February and December (3.11").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in September
Philo, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is August (1.3 days).
Average snowfall in September
Philo, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Philo, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Philo, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Philo, CA
- Average sunshine days in September: 26.9 days
The month with the most sunshine days is July (28.5 days).
The month with the least sunshine days is March (15.9 days).
Average UV index in September
Philo, CA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are February and November (UV index 2).
Average cloud cover in September
Philo, CA
- Average cloud cover in September: 11
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in September
Philo, CA
- Average visibility in September: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, March and December (5mi).
Philo, California, USA
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