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
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a warm 84.2°F (29°C) in August to a still moderately hot 78.3°F (25.7°C). Philadelphia's nighttime temperature in September falls to an average of 58.1°F (14.5°C).Humidity
The average relative humidity in September is 74%.Rainfall
In September, in Philadelphia, the rain falls for 10.7 days. Throughout September, 2.24" (57mm) of precipitation is accumulated. In Philadelphia, during the entire year, the rain falls for 138.1 days and collects up to 26.97" (685mm) of precipitation.Snowfall
In Philadelphia, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:50 pm CDT.
Sunshine
The average sunshine in September is 9.4h.UV index
In Philadelphia, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Philadelphia?
What is the average humidity in September in Philadelphia?
How much does it rain in Philadelphia in September?
When it does not snow in Philadelphia?
How many hours of daylight does Philadelphia have in September?
When are sunrise and sunset in September in Philadelphia?
How many hours of sunshine does Philadelphia have in September?
What is the UV index intensity in September in Philadelphia?
Average temperature in September
Philadelphia, MO
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in September
Philadelphia, MO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Philadelphia, MO
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in September
Philadelphia, MO
- Average humidity in September: 74%
The months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Philadelphia, MO
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in September
Philadelphia, MO
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in September
Philadelphia, MO
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Philadelphia, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Philadelphia, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Philadelphia, MO
- Average sunshine days in September: 18.1 days
The months with the most sunshine days are January and December (19.4 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in September
Philadelphia, MO
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Philadelphia, MO
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in September
Philadelphia, MO
- 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).
Philadelphia, Missouri, USA
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