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
September brings a slight decrease in temperature, down from a warm 78.1°F (25.6°C) in August to an agreeable 71.8°F (22.1°C). Mendon throughout September, records an average low-temperature of 53.1°F (11.7°C).Humidity
The months with the lowest humidity in Mendon are April, May, August and September, with an average relative humidity of 77%.Rainfall
The months with the least rainfall are January and September Rain falls for 14.5 days and accumulates 1.81" (46mm) of rain.Snowfall
June through September are months without snowfall.Daylight
In Mendon, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:44 pm. On the last day of September, in Mendon, sunrise is at 7:07 am and sunset at 6:52 pm EDT.
Sunshine
In Mendon, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Mendon, New York, is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 3 in September leads to these recommendations:
Exercise prevention - Warding off sunburn is urged. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Mendon in September?
What is the least humid month in Mendon?
What is the average humidity in September in Mendon?
What is the driest month in Mendon?
How much does it rain in Mendon in September?
When it does not snow in Mendon?
Does it snow in Mendon in September?
What is the average length of the day in September in Mendon?
When is the sunrise / sunset in September in Mendon?
How many hours of sunshine does Mendon have in September?
How high is the UV index in September in Mendon?
Average temperature in September
Mendon, NY
- Average high temperature in September: 71.8°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in September: 53.1°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 (18.3°F).
Average pressure in September
Mendon, 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
Mendon, NY
- Average wind speed in September: 6.6mph
The windiest months (with the highest average wind speed) are January and February (10.2mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in September
Mendon, NY
- Average humidity in September: 77%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, May, August and September (77%).
Average rainfall in September
Mendon, NY
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (3.07").
The driest months (with the least rainfall) are January and September (1.81").
Average rainfall days in September
Mendon, NY
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in September
Mendon, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (8.27").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Mendon, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mendon, NY
- Average daylight in September: 12h and 3min
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 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 2h and 30min).
Average sunshine days in September
Mendon, NY
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is September (13.5 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in September
Mendon, 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
Mendon, NY
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
Mendon, NY
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Mendon, New York, USA
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