September weather forecastManchester, NY
September
Weather in September
September, the first month of the autumn in Manchester, is still a pleasant month, with an average temperature fluctuating between 71.4°F (21.9°C) and 53.2°F (11.8°C).Temperature
A moderate decline in average high-temperatures is noted in September, moving from a moderately hot 78.1°F (25.6°C) in August to an agreeable 71.4°F (21.9°C). During the month of September, an average temperature of 53.2°F (11.8°C) is noted during the nights.Humidity
The average relative humidity in September is 78%.Rainfall
In September, the rain falls for 10.5 days. Throughout September, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 123.3 rainfall days, and 11.54" (293mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Manchester, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:34 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:51 pm EDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In Manchester, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 3 suggests this advice:
Exercise prevention - Precautions against solar damage are endorsed. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Manchester, NY
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in September
Manchester, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Manchester, NY
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in September
Manchester, NY
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is April (77%).
Average rainfall in September
Manchester, NY
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is October (1.38").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Manchester, NY
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (13.9 days).
The months with the least rainy days are January and February (5.1 days).
Average snowfall in September
Manchester, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.4").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Manchester, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Manchester, NY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 2h and 36min).
Average sunshine days in September
Manchester, NY
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is September (16.9 days).
The month with the least sunshine days is April (12 days).
Average UV index in September
Manchester, NY
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Manchester, NY
- Average cloud cover in September: 36
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 32).
Average visibility in September
Manchester, NY
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
