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
September
Weather in September
Temperature
September signifies a minor drop in average high-temperature, transitioning from a warm 75.4°F (24.1°C) in August to a pleasant 69.1°F (20.6°C). Cortland reports a consistent average low-temperature of 50.5°F (10.3°C) throughout September nights.Humidity
The average relative humidity in September is 82%.Rainfall
In Cortland, in September, during 12.9 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Cortland, during the entire year, the rain falls for 149.8 days and collects up to 22.36" (568mm) of precipitation.Snowfall
In Cortland, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:30 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:47 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 3 during September translates into the following guidance:
Take precautions - Protection against skin and eye damage is obliged. When the Sun is at its strongest around midday, find shade and limit exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
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 Cortland have in September?
When are sunrise and sunset in September in Cortland?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Cortland, NY
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in September
Cortland, NY
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Cortland, NY
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in September
Cortland, NY
- Average humidity in September: 82%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (80%).
Average rainfall in September
Cortland, NY
- Average rainfall in September: 1.54"
The wettest months (with the highest rainfall) are May and July (2.48").
The driest month (with the least rainfall) is November (1.34").
Average rainfall days in September
Cortland, NY
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in September
Cortland, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Cortland, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Cortland, 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 6min).
The month with the least sunshine is February (Average sunshine: 2h and 24min).
Average sunshine days in September
Cortland, NY
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is September (15.8 days).
The month with the least sunshine days is February (7.7 days).
Average UV index in September
Cortland, 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
Cortland, NY
- Average cloud cover in September: 39
The months with the most cloud cover are January and February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in September
Cortland, NY
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The month with the lowest visibility is February (4mi).