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
A modest decline in the average high-temperature is seen during September, decreasing from a moderately hot 75.7°F (24.3°C) in August to a pleasant 69.1°F (20.6°C). Altona's nighttime temperature in September falls to an average of 50.9°F (10.5°C).Humidity
The average relative humidity in September in Altona is 78%.Rainfall
In September, the rain falls for 12.3 days. Throughout September, 1.85" (47mm) of precipitation is accumulated. Throughout the year, there are 146.4 rainfall days, and 27.36" (695mm) of precipitation is accumulated.Snowfall
In Altona, snow does not fall in June through September.Daylight
In September, the average length of the day in Altona is 12h and 31min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:36 pm EDT.
Sunshine
The average sunshine in September in Altona is 8.8h.UV index
In September, the average daily maximum UV index in Altona, New York, is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the UV index of 3 transforms into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What is the usual temperature for Altona in September?
What is the average humidity in September in Altona?
How many days does it rain in September in Altona?
When it does not snow in Altona?
Does it snow in Altona in September?
How many hours of daylight does Altona have in September?
What time are sunrise and sunset in September in Altona?
How many hours of sunshine does Altona have in September?
What is the UV index reading in September in Altona?
Average temperature in September
Altona, NY
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (23.5°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in September
Altona, NY
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Altona, NY
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in September
Altona, NY
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (89%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in September
Altona, NY
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is January (1.54").
Average rainfall days in September
Altona, NY
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in September
Altona, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (8.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Altona, 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
Altona, 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 54min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).
Average sunshine days in September
Altona, NY
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is November (16 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in September
Altona, NY
- Average UV index in September: 3
The months with the highest UV index are 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
Altona, NY
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
Altona, NY
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (4mi).
Altona, New York, USA
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