September weather forecastRound Lake, NY
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Round Lake, New York, with an average temperature varying between 51.4°F (10.8°C) and 72.1°F (22.3°C).Temperature
September witnesses a gentle descent in average high-temperature, descending from August's warm 79.3°F (26.3°C) to an agreeable 72.1°F (22.3°C). In the month of September, the nighttime temperature in Round Lake dips to a steady average of 51.4°F (10.8°C).Humidity
In Round Lake, the average relative humidity in September is 77%.Rainfall
In Round Lake, during September, the rain falls for 11 days and regularly aggregates up to 2.09" (53mm) of 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 in Round Lake.Daylight
In Round Lake, New York, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:20 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:37 pm EDT.
Sunshine
In September, the average sunshine in Round Lake, New York, is 9h.UV index
The average daily maximum UV index in September in Round Lake is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Round Lake, 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
Round Lake, 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
Round Lake, 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
Round Lake, 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
Round Lake, 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
Round Lake, 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
Round Lake, 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
Round Lake, 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
Round Lake, NY
- Average daylight in September: 12h and 30min
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
Round Lake, 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
Round Lake, 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
Round Lake, 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
Round Lake, 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).
