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 onset of September entails a subtle temperature shift, as the average high-temperature eases from a warm 82.8°F (28.2°C) in August to a still moderately hot 75.7°F (24.3°C). In Royersford, September nights cool down to an average of 58.6°F (14.8°C).Humidity
The average relative humidity in September is 77%.Rainfall
In Royersford, during September, the rain falls for 11.8 days and regularly aggregates up to 0.91" (23mm) of precipitation. In Royersford, during the entire year, the rain falls for 132.3 days and collects up to 13.98" (355mm) of precipitation.Snowfall
In Royersford, snow does not fall in April through October.Daylight
In Royersford, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:30 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:45 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Exercise prevention - Warding off sunburn is urged. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Royersford have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Royersford have in September?
What is the UV index intensity in September?
Average temperature in September
Royersford, PA
- Average high temperature in September: 75.7°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in September
Royersford, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Royersford, PA
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Royersford, PA
- Average humidity in September: 77%
The month with the highest relative humidity is February (80%).
The months with the lowest relative humidity are April and July (74%).
Average rainfall in September
Royersford, PA
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is August (1.77").
The driest month (with the least rainfall) is February (0.75").
Average rainfall days in September
Royersford, PA
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in September
Royersford, PA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Royersford, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Royersford, PA
- 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: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Royersford, PA
- Average sunshine days in September: 17 days
The month with the most sunshine days is January (20.7 days).
The month with the least sunshine days is June (12.8 days).
Average UV index in September
Royersford, PA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Royersford, PA
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Royersford, PA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Royersford, Pennsylvania, USA
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