September weather forecastRochester, VT
September
Weather in September
September, the first month of the autumn in Rochester, is also an enjoyable month, with an average temperature varying between 67.8°F (19.9°C) and 48.6°F (9.2°C).Temperature
The commencement of September indicates a gentle shift in the average high-temperature, receding from August's moderately hot 75°F (23.9°C) to an enjoyable 67.8°F (19.9°C). During September nights, Rochester records an average temperature of 48.6°F (9.2°C).Humidity
In September, the average relative humidity is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 9.5 days and accumulates 0.83" (21mm) of precipitation.Snowfall
June through September are months without snowfall in Rochester.Daylight
In Rochester, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:15 am and sunset at 7:26 pm. On the last day of September, in Rochester, sunrise is at 6:48 am and sunset at 6:33 pm EDT.
Sunshine
The average sunshine in September is 8h.UV index
In Rochester, Vermont, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rochester, VT
- Average high temperature in September: 67.8°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (10.9°F).
Average pressure in September
Rochester, VT
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Rochester, VT
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Rochester, VT
- Average humidity in September: 80%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and May (77%).
Average rainfall in September
Rochester, VT
- Average rainfall in September: 0.83"
The wettest month (with the highest rainfall) is June (1.73").
The driest month (with the least rainfall) is September (0.83").
Average rainfall days in September
Rochester, VT
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in September
Rochester, VT
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.05").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rochester, VT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rochester, VT
- 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 0min
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 36min).
Average sunshine days in September
Rochester, VT
- Average sunshine days in September: 18 days
The month with the most sunshine days is September (18 days).
The month with the least sunshine days is February (11.7 days).
Average UV index in September
Rochester, VT
- 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 and December (UV index 1).
Average cloud cover in September
Rochester, VT
- Average cloud cover in September: 43
The month with the most cloud cover is February (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 40).
Average visibility in September
Rochester, VT
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February and March (4mi).
