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 commencement of September, Ballston Spa records a moderate temperature decline, with the average high easing from August's warm 79.3°F (26.3°C) to a pleasant 72.1°F (22.3°C). Ballston Spa records a consistent low-temperature of 51.4°F (10.8°C) during September nights.Humidity
The average relative humidity in September is 77%.Rainfall
In Ballston Spa, in September, it is raining for 11 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 140.7 rainfall days, and 31.02" (788mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Ballston Spa is 12h and 29min.On the first day of the month, sunrise is at 6:20 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:37 pm EDT.
Sunshine
In Ballston Spa, the average sunshine in September is 9h.UV index
In Ballston Spa, the average daily maximum UV index in September is 4. 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: An average UV index of 4 in September transforms into this advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in Ballston Spa in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September in Ballston Spa?
How high is the UV index in September?
Average temperature in September
Ballston Spa, NY
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in September
Ballston Spa, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Ballston Spa, NY
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is April (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Ballston Spa, NY
- Average humidity in September: 77%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Ballston Spa, NY
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is March (1.97").
Average rainfall days in September
Ballston Spa, NY
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in September
Ballston Spa, NY
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.32").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Ballston Spa, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Ballston Spa, 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: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Ballston Spa, NY
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in September
Ballston Spa, NY
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
Ballston Spa, NY
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
Ballston Spa, NY
- Average visibility in September: 5mi
The months with the highest visibility are April, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, March, May, August and September (5mi).
Ballston Spa, New York, USA
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