September weather forecastSalem, VA
September
Weather in September
September ushers in autumn in Salem, with clear skies and cooler temperatures. The month presents a variation in the temperature spectrum, which moves between 56.1°F (13.4°C) and 77.7°F (25.4°C). Come September, rainfall decreases to 1.61" (41mm) signifying the start of a drier phase in Salem. The advent of autumn witnesses shorter daylight hours and less direct sunshine hours, leading to a decline in the UV index to 5. This month also maintains an average wind speed, except for particularly gusty days which can peak up to 6.8mph (10.9km/h).Temperature
In Salem, entering September brings a subtle temperature decrement, reducing from August's moderately hot 84.4°F (29.1°C) to a still warm 77.7°F (25.4°C). Throughout September, Salem's nights cool down to an average of 56.1°F (13.4°C).Humidity
The months with the highest humidity are May, September and December, with an average relative humidity of 77%.Rainfall
September is the month with the least rainfall. Rain falls for 12.9 days and accumulates 1.61" (41mm) of precipitation.Snowfall
In Salem, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 6:51 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:04 pm EDT.
Sunshine
The average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 5 in September leads to these guidelines:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. 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
Average temperature in September
Salem, VA
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (41.2°F).
- Average low temperature in September: 56.1°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in September
Salem, VA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Salem, VA
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is February (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Salem, VA
- Average humidity in September: 77%
The months with the highest relative humidity are May, September and December (77%).
The month with the lowest relative humidity is July (72%).
Average rainfall in September
Salem, VA
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in September
Salem, VA
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is November (7.6 days).
Average snowfall in September
Salem, VA
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.76").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Salem, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Salem, VA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in September
Salem, VA
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in September
Salem, VA
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Salem, VA
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 45).
The months with the least cloud cover are June and July (Cloud cover 31).
Average visibility in September
Salem, VA
- Average visibility in September: 5mi
The months with the highest visibility are June, July and November (6mi).
The months with the lowest visibility are January, February, March, April, May, August, September, October and December (5mi).
