September weather forecastGulph Mills, PA
September
Weather in September
September, the first month of the autumn in Gulph Mills, is still a warm month, with temperature in the range of an average high of 76.1°F (24.5°C) and an average low of 59°F (15°C).Temperature
Gulph Mills in September undergoes a slight reduction in the average high-temperature, shifting from August's 83.3°F (28.5°C) to a still warm 76.1°F (24.5°C). Gulph Mills experiences an average low-temperature reading of 59°F (15°C) throughout September.Humidity
The average relative humidity in September is 76%.Rainfall
In Gulph Mills, Pennsylvania, in September, it is raining for 10.8 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 138.2 rainfall days, and 15.59" (396mm) of precipitation is accumulated.Snowfall
April, June through November are months without snowfall.Daylight
In Gulph Mills, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:29 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:44 pm EDT.
Sunshine
The average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: An average UV index of 4 in September transforms into this advice:
Act with care - The need to guard against sun damage is communicated. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Gulph Mills, PA
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Gulph Mills, 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
Gulph Mills, PA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in September
Gulph Mills, PA
- Average humidity in September: 76%
The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April and July (72%).
Average rainfall in September
Gulph Mills, PA
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is July (1.89").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in September
Gulph Mills, PA
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is November (7.4 days).
Average snowfall in September
Gulph Mills, PA
- Average snowfall in September: 0"
The months with the highest snowfall are February and March (0.55").
The months with the least snowfall are April, June, July, August, September, October and November (0").
Average snowfall days in September
Gulph Mills, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Gulph Mills, PA
- Average daylight in September: 12h and 24min
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 48min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Gulph Mills, PA
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is November (20.5 days).
The months with the least sunshine days are May and June (12.8 days).
Average UV index in September
Gulph Mills, 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
Gulph Mills, PA
- Average cloud cover in September: 38
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Gulph Mills, 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).
