Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a warm 77.5°F (25.3°C) in August to an agreeable 70.7°F (21.5°C). During September nights, Alpine records an average temperature of 50.7°F (10.4°C).Humidity
In September, the average relative humidity in Alpine is 80%.Rainfall
In Alpine, during September, the rain falls for 10.1 days and regularly aggregates up to 0.94" (24mm) of precipitation. Throughout the year, there are 133.1 rainfall days, and 12.32" (313mm) of precipitation is accumulated.Snowfall
In Alpine, snow does not fall in June through September.Daylight
In September, the average length of the day in Alpine is 12h and 28min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:49 pm EDT.
Sunshine
In Alpine, the average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Alpine is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 3 during September translates into the following guidance:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Alpine in September?
What is the average humidity in September in Alpine?
How many days does it rain in September in Alpine?
When it does not snow in Alpine?
Does it snow in Alpine in September?
What is the average length of the day in September in Alpine?
When are sunrise and sunset in September in Alpine?
How many hours of sunshine does Alpine have in September?
What is the UV index reading in September in Alpine?
Average temperature in September
Alpine, NY
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in September
Alpine, NY
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Alpine, NY
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in September
Alpine, NY
- Average humidity in September: 80%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, May and July (78%).
Average rainfall in September
Alpine, NY
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
Alpine, NY
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (6 days).
Average snowfall in September
Alpine, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Alpine, NY
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alpine, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in September
Alpine, NY
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is November (17.8 days).
The months with the least sunshine days are April and May (11.8 days).
Average UV index in September
Alpine, NY
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Alpine, NY
- Average cloud cover in September: 39
The months with the most cloud cover are January and February (Cloud cover 70).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in September
Alpine, NY
- Average visibility in September: 5mi
The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).
Alpine, New York, USA
Weather forecast for your location
2. Allow the app to use your location