September weather forecastValhalla, NY
September
Weather in September
The first month of the autumn, September, is still a warm month in Valhalla, New York, with an average temperature ranging between max 73.9°F (23.3°C) and min 60.6°F (15.9°C).Temperature
The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from 81.1°F (27.3°C) to a still moderately hot 73.9°F (23.3°C). In September, Valhalla's temperature tends to fall to an average low of 60.6°F (15.9°C) during the night.Humidity
In September, the average relative humidity is 74%.Rainfall
September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 2.2" (56mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Valhalla, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:51 am and sunset at 6:38 pm EDT.
Sunshine
The average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Valhalla, NY
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 60.6°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure in September
Valhalla, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Valhalla, NY
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in September
Valhalla, NY
- Average humidity in September: 74%
The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are April and August (71%).
Average rainfall in September
Valhalla, NY
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is December (3.98").
The driest month (with the least rainfall) is September (2.2").
Average rainfall days in September
Valhalla, NY
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in September
Valhalla, NY
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.78").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Valhalla, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.7 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
Valhalla, 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 48min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Valhalla, NY
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in September
Valhalla, NY
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Valhalla, NY
- Average cloud cover in September: 34
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Valhalla, NY
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
