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 signifies a gentle decline in Massena's average high-temperature, easing from a moderately hot 75.9°F (24.4°C) in August to an agreeable 69.3°F (20.7°C). September brings an average low-temperature of 50.9°F (10.5°C) to Massena.Humidity
The average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall in Massena. Rain falls for 13.2 days and accumulates 2.01" (51mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Massena, New York, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:22 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:41 pm EDT.
Sunshine
In Massena, the average sunshine in September is 8.8h.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 ordinary individuals.Note: The maximum daily UV index of 3 during September translates into the following directions:
Exercise prevention - Warding off sunburn is urged. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Massena have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Massena, NY
- Average high temperature in September: 69.3°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (23°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in September
Massena, NY
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are March and November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Massena, NY
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is February (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in September
Massena, NY
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is April (77%).
Average rainfall in September
Massena, NY
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is August (3.23").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
Massena, NY
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in September
Massena, NY
- Average snowfall in September: 0"
The month with the highest snowfall is January (9.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Massena, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Massena, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 5min
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 42min).
Average sunshine days in September
Massena, NY
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is November (16 days).
The month with the least sunshine days is July (9.1 days).
Average UV index in September
Massena, 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
Massena, NY
- Average cloud cover in September: 36
The month with the most cloud cover is February (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
Massena, NY
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Massena, New York, USA
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