September weather forecastSouth Salem, NY
September
Weather in September
The first month of the autumn, September, is also an agreeable month in South Salem, New York, with temperature in the range of an average low of 56.5°F (13.6°C) and an average high of 73°F (22.8°C).Temperature
September signifies a gentle decline in South Salem's average high-temperature, easing from a warm 80.2°F (26.8°C) in August to a pleasant 73°F (22.8°C). South Salem's nighttime temperature in September drops to an average of 56.5°F (13.6°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In South Salem, during September, the rain falls for 9.7 days and regularly aggregates up to 0.67" (17mm) of precipitation. In South Salem, during the entire year, the rain falls for 123.7 days and collects up to 11.65" (296mm) of precipitation.Snowfall
In South Salem, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:21 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:37 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Prioritize safety - Recommendations to avert sunburn are shared. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Salem, NY
- Average high temperature in September: 73°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in September
South Salem, NY
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
South Salem, NY
- Average wind speed in September: 5.9mph
The windiest months (with the highest average wind speed) are January and March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
South Salem, NY
- Average humidity in September: 78%
The months with the highest relative humidity are February and October (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
South Salem, NY
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is July (1.57").
The driest months (with the least rainfall) are January and February (0.55").
Average rainfall days in September
South Salem, NY
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is July (14.4 days).
The month with the least rainy days is January (5.5 days).
Average snowfall in September
South Salem, NY
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.75").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
South Salem, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
South Salem, NY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 36min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
South Salem, NY
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is January (22.5 days).
The month with the least sunshine days is June (13.3 days).
Average UV index in September
South Salem, NY
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
South Salem, NY
- Average cloud cover in September: 37
The months with the most cloud cover are February, March and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
South Salem, NY
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, July, August, September, October, November and December (6mi).
The months with the lowest visibility are May and June (5mi).
