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
With the onset of September, Rochester's average high-temperature clocks in at a still warm 73.8°F (23.2°C), showing a minor fluctuation from the previous month. Nighttime temperature lowers to an average of 55.9°F (13.3°C) in September.Humidity
The average relative humidity in September is 79%.Rainfall
In Rochester, during September, the rain falls for 10.1 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, there are 129.2 rainfall days, and 15.04" (382mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 7:12 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 7:27 pm EDT.
Sunshine
In Rochester, the average sunshine in September is 8h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature 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 Rochester in September?
What is the average length of the day in September?
What time are sunrise and sunset in September in Rochester?
How long on average sun shines in September?
How high is the UV index in September in Rochester?
Average temperature in September
Rochester, IN
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Rochester, IN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Rochester, IN
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Rochester, IN
- Average humidity in September: 79%
The months with the highest relative humidity are January, February and July (84%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Rochester, IN
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is May (2.09").
The driest months (with the least rainfall) are February and December (0.79").
Average rainfall days in September
Rochester, IN
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (4.6 days).
Average snowfall in September
Rochester, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Rochester, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rochester, IN
- 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 18min).
- Average sunshine in September: 8h and 0min
The months with the most sunshine are June and July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Rochester, IN
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in September
Rochester, IN
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Rochester, IN
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Rochester, IN
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are July, August and September (5mi).
Rochester, Indiana, USA
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