September weather forecastMahaffey, PA
September
Weather in September
September, the first month of the autumn in Mahaffey, is still a pleasant month, with an average temperature varying between 51.6°F (10.9°C) and 72.1°F (22.3°C).Temperature
September signals a slight drop in average high-temperature, sliding from August's moderately hot 79°F (26.1°C) to an agreeable 72.1°F (22.3°C). The average temperature during September nights dips to a cool 51.6°F (10.9°C).Humidity
In Mahaffey, Pennsylvania, the average relative humidity in September is 80%.Rainfall
In Mahaffey, in September, it is raining for 11.5 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 136.6 rainfall days, and 18.54" (471mm) of precipitation is accumulated.Snowfall
In Mahaffey, snow does not fall in June through September.Daylight
In Mahaffey, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:58 pm EDT.
Sunshine
In Mahaffey, the average sunshine in September is 8h.UV index
The average daily maximum UV index in September in Mahaffey is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 3 translates into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mahaffey, PA
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in September: 51.6°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in September
Mahaffey, PA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Mahaffey, PA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Mahaffey, PA
- Average humidity in September: 80%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is July (77%).
Average rainfall in September
Mahaffey, PA
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is May (2.28").
The driest months (with the least rainfall) are January and November (1.06").
Average rainfall days in September
Mahaffey, PA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Mahaffey, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Mahaffey, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mahaffey, PA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
Mahaffey, PA
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in September
Mahaffey, PA
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Mahaffey, PA
- Average cloud cover in September: 45
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in September
Mahaffey, PA
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
