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
With the onset of September, the average high-temperature subtly recedes from August's warm 75.7°F (24.3°C) to an agreeable 69.1°F (20.6°C). September nights observe an average temperature dip to a fresh 52.9°F (11.6°C).Humidity
April and September, with an average relative humidity of 77%, are the least humid months.Rainfall
The month with the least rainfall in Black River is September, when the rain falls for 13 days and typically collects 1.81" (46mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 30min.On the first day of September, sunrise is at 6:27 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:45 pm EDT.
Sunshine
In Black River, the average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A maximum high UV index of 3 in September translates into the following recommendations:
Take precautions - Protection against sunburn is recommended. Around midday, solar radiation is most harmful; hence, exposure should be limited. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the least humid month?
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 Black River have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Black River, NY
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Black River, NY
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Black River, NY
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).
Average humidity in September
Black River, NY
- Average humidity in September: 77%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and September (77%).
Average rainfall in September
Black River, NY
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is October (3.54").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Black River, NY
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is October (17.7 days).
The month with the least rainy days is February (7 days).
Average snowfall in September
Black River, NY
- Average snowfall in September: 0"
The month with the highest snowfall is January (10.47").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Black River, 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
Black River, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 1min
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 42min).
Average sunshine days in September
Black River, NY
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is February (6.7 days).
Average UV index in September
Black River, 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
Black River, NY
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Black River, NY
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Black River, New York, USA
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