September weather forecastBlue Mountain Lake, NY
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Blue Mountain Lake, New York, with an average temperature fluctuating between 47.5°F (8.6°C) and 66.9°F (19.4°C).Temperature
With the commencement of September, Blue Mountain Lake records a moderate temperature decline, with the average high easing from August's warm 73.9°F (23.3°C) to a refreshing 66.9°F (19.4°C). In Blue Mountain Lake, September is marked by an average low-temperature of 47.5°F (8.6°C).Humidity
The average relative humidity in September in Blue Mountain Lake is 81%.Rainfall
In September, the rain falls for 10.7 days. Throughout September, 1.18" (30mm) of precipitation is accumulated. In Blue Mountain Lake, New York, during the entire year, the rain falls for 151.8 days and collects up to 18.19" (462mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Blue Mountain Lake, New York, the average length of the day in September is 12h and 30min.On the first day of September in Blue Mountain Lake, sunrise is at 6:22 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:39 pm EDT.
Sunshine
The average sunshine in September is 8.1h.UV index
The average daily maximum UV index in September in Blue Mountain Lake is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Blue Mountain Lake, NY
- Average high temperature in September: 66.9°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (23.7°F).
- Average low temperature in September: 47.5°F
The month with the highest average low temperature is July (55.2°F).
The coldest month (with the lowest average low temperature) is January (11.5°F).
Average pressure in September
Blue Mountain Lake, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Blue Mountain Lake, NY
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest months (with the lowest average wind speed) are August and September (5.5mph).
Average humidity in September
Blue Mountain Lake, NY
- Average humidity in September: 81%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is May (77%).
Average rainfall in September
Blue Mountain Lake, NY
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is June (2.17").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in September
Blue Mountain Lake, NY
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in September
Blue Mountain Lake, NY
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (4.88").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Blue Mountain Lake, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Blue Mountain Lake, NY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in September
Blue Mountain Lake, NY
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is September (16.6 days).
The month with the least sunshine days is February (9.4 days).
Average UV index in September
Blue Mountain Lake, 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, March and December (UV index 1).
Average cloud cover in September
Blue Mountain Lake, NY
- Average cloud cover in September: 43
The month with the most cloud cover is February (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 41).
Average visibility in September
Blue Mountain Lake, NY
- Average visibility in September: 4mi
The months with the highest visibility are April, May, June, July, October, November and December (5mi).
The months with the lowest visibility are January, February, March, August and September (4mi).
