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 onset corresponds with a subtle shift in the average high-temperature, slightly moving from a warm 77.5°F (25.3°C) in August to a pleasant 71.1°F (21.7°C). During the September nights, an average temperature of 55.6°F (13.1°C) is observed.Humidity
September is the least humid month in East Rochester, with an average relative humidity of 76%.Rainfall
In East Rochester, in September, during 15.1 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, in East Rochester, there are 163.3 rainfall days, and 23.7" (602mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in East Rochester is 12h and 29min.On the first day of September, sunrise is at 6:35 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:52 pm EDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
The average daily maximum UV index in September in East Rochester is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What are September temperatures in East Rochester?
What is the least humid month in East Rochester?
What is the average humidity in September in East Rochester?
How much does it rain in East Rochester in September?
When it does not snow in East Rochester?
Does it snow in East Rochester in September?
What is the average length of the day in September in East Rochester?
What time are sunrise and sunset in September in East Rochester?
How long on average sun shines in September in East Rochester?
What is the UV index intensity in September in East Rochester?
Average temperature in September
East Rochester, NY
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 55.6°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 (19.6°F).
Average pressure in September
East Rochester, 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
East Rochester, NY
- Average wind speed in September: 7.5mph
The windiest months (with the highest average wind speed) are January and February (11.4mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
East Rochester, NY
- Average humidity in September: 76%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is September (76%).
Average rainfall in September
East Rochester, NY
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is January (1.26").
Average rainfall days in September
East Rochester, NY
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in September
East Rochester, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
East Rochester, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
East Rochester, NY
- Average daylight in September: 12h and 3min
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 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
East Rochester, NY
- Average sunshine days in September: 12.8 days
The months with the most sunshine days are May and September (12.8 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in September
East Rochester, NY
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
East Rochester, NY
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in September
East Rochester, NY
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
East Rochester, New York, USA
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