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
In September, the average high-temperature marginally drops from a moderately hot 24.7°C (76.5°F) in August to an agreeable 20.9°C (69.6°F). In September, Hornell's temperature tends to fall to an average low of 9.8°C (49.6°F) during the night.Humidity
In Hornell, the average relative humidity in September is 81%.Rainfall
In Hornell, in September, during 12.9 rainfall days, 38mm (1.5") of precipitation is typically accumulated. In Hornell, during the entire year, the rain falls for 153.6 days and collects up to 571mm (22.48") of precipitation.Snowfall
In Hornell, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:36 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:53 pm EDT.
Sunshine
In Hornell, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September in Hornell is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 3 translates into these guidelines:
Make use of precautions - It is urged to ward off sun damage. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. 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
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Hornell have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Hornell, NY
- Average high temperature in September: 20.9°C
The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is January (-2.3°C).
- Average low temperature in September: 9.8°C
The month with the highest average low temperature is July (13.9°C).
The coldest month (with the lowest average low temperature) is January (-8.9°C).
Average pressure in September
Hornell, NY
- Average pressure in September: 1017.9mbar
The month with the highest atmospheric pressure is November (1019.5mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).
Average wind speed in September
Hornell, NY
- Average wind speed in September: 10.4km/h
The windiest month (with the highest average wind speed) is January (16.6km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).
Average humidity in September
Hornell, NY
- Average humidity in September: 81%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is May (78%).
Average rainfall in September
Hornell, NY
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is October (64mm).
The driest month (with the least rainfall) is January (32mm).
Average rainfall days in September
Hornell, NY
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in September
Hornell, NY
- Average snowfall in September: 0mm
The month with the highest snowfall is February (166mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Hornell, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hornell, NY
- Average daylight in September: 12h and 3min
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 6min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The months with the least sunshine are January, February and December (Average sunshine: 2h and 48min).
Average sunshine days in September
Hornell, NY
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is September (14.9 days).
The month with the least sunshine days is February (9 days).
Average UV index in September
Hornell, NY
- 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, February and December (UV index 1).
Average cloud cover in September
Hornell, NY
- Average cloud cover in September: 43
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 39).
Average visibility in September
Hornell, NY
- Average visibility in September: 8km
The month with the highest visibility is April (9km).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (8km).
Hornell, New York, USA
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