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
Chester's progression into September involves a gentle drop in the average high-temperature, from 81.5°F (27.5°C) in August to a still warm 74.1°F (23.4°C). An average low-temperature of 54.9°F (12.7°C) marks the month of September.Humidity
In Chester, the average relative humidity in September is 78%.Rainfall
In Chester, in September, it is raining for 12.1 days, with typically 1.54" (39mm) of accumulated precipitation. In Chester, during the entire year, the rain falls for 141.2 days and collects up to 25" (635mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Chester, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:24 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:40 pm EDT.
Sunshine
In Chester, the average sunshine in September is 8.8h.UV index
In Chester, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Prioritize safety - Suggestions to prevent sun damage are offered. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Chester in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Chester have in September?
How high is the UV index in September?
Average temperature in September
Chester, NY
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in September: 54.9°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 (20.7°F).
Average pressure in September
Chester, NY
- Average pressure in September: 30.06"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
Chester, NY
- Average wind speed in September: 5mph
The windiest months (with the highest average wind speed) are January, February and March (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Chester, NY
- Average humidity in September: 78%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Chester, NY
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is July (2.68").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in September
Chester, NY
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (5.5 days).
Average snowfall in September
Chester, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Chester, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Chester, NY
- Average daylight in September: 12h and 3min
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 12min).
- Average sunshine in September: 8h and 5min
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 30min).
Average sunshine days in September
Chester, NY
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is January (21 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in September
Chester, 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
Chester, NY
- Average cloud cover in September: 38
The months with the most cloud cover are February and March (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Chester, 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).
Chester, New York, USA
Weather forecast for your location
2. Allow the app to use your location