September weather forecastManhattan, PA
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Manhattan, Pennsylvania, with temperature in the range of an average high of 69.8°F (21°C) and an average low of 49.6°F (9.8°C).Temperature
September sees a slight reduction in average high-temperature, with a shift from a moderately hot 77.2°F (25.1°C) in August to a pleasant 69.8°F (21°C). Throughout September, an average low-temperature of 49.6°F (9.8°C) is experienced.Humidity
The average relative humidity in September is 81%.Rainfall
In Manhattan, in September, during 10.7 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. Throughout the year, there are 125.8 rainfall days, and 15.71" (399mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Manhattan.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:53 pm EDT.
Sunshine
In Manhattan, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Manhattan, PA
- Average high temperature in September: 69.8°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in September: 49.6°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Manhattan, 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
Manhattan, PA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Manhattan, PA
- Average humidity in September: 81%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are June and July (78%).
Average rainfall in September
Manhattan, PA
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is April (1.69").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in September
Manhattan, PA
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in September
Manhattan, PA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Manhattan, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Manhattan, PA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The months with the least sunshine are January and December (Average sunshine: 3h and 6min).
Average sunshine days in September
Manhattan, PA
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in September
Manhattan, PA
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Manhattan, PA
- Average cloud cover in September: 44
The months with the most cloud cover are January, February and December (Cloud cover 69).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in September
Manhattan, PA
- Average visibility in September: 4mi
The month with the highest visibility is April (6mi).
The month with the lowest visibility is September (4mi).
