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Weather in Rochester for September 2025

Your guide to Rochester weather in September - trends and predictions

  • In general, the average temperature in Rochester at the beginning of September is 27.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21 °F by the end of September.

  • Rochester sees moderate rainfall in September, averaging 6 rainy days.

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Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/12°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Rochester in September average weather

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
25°
2
Overcast
23°
3
Sunny
27°
4
Thundery outbreaks possible
29°
5
Sunny
30°
6
Thundery outbreaks possible
30°
7
Light rain shower
26°
8
Overcast
21°
9
Overcast
20°
10
Light rain shower
20°
11
Mist
23°
12
Mist
26°
13
Overcast
21°
14
Overcast
23°
15
Sunny
24°
16
Cloudy
24°
17
Patchy rain possible
23°
18
Patchy rain possible
22°
19
Overcast
22°
20
Mist
23°
21
Mist
24°
22
Mist
25°
23
Overcast
19°
24
Cloudy
19°
25
Cloudy
22°
26
Overcast
23°
27
Overcast
20°
28
Cloudy
19°
29
Patchy rain possible
22°
30
Overcast
22°
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Temperatures trend during September in Rochester

See the weather trend as well as the moving average line

September weather day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
 25° /12° 0.6 mm 6
Sept. 2 Overcast
Overcast
 23° /12° 0 mm 6
Sept. 3 Sunny
Sunny
 27° /13° 0 mm 7
Sept. 4 Thundery outbreaks possible
Thundery outbreaks possible
 29° /17° 0 mm 7
Sept. 5 Sunny
Sunny
 30° /16° 0 mm 8
Sept. 6 Thundery outbreaks possible
Thundery outbreaks possible
 30° /16° 1 mm 7
Sept. 7 Light rain shower
Light rain shower
 26° /14° 18.2 mm 6
Sept. 8 Overcast
Overcast
 21° /12° 0.1 mm 5
Sept. 9 Overcast
Overcast
 20° /12° 1.9 mm 5
Sept. 10 Light rain shower
Light rain shower
 20° /15° 1.2 mm 5
Sept. 11 Mist
Mist
 23° /13° 0 mm 5
Sept. 12 Mist
Mist
 26° /13° 0.6 mm 7
Sept. 13 Overcast
Overcast
 21° /14° 0 mm 6
Sept. 14 Overcast
Overcast
 23° /13° 0 mm 6
Sept. 15 Sunny
Sunny
 24° /12° 0 mm 7
Sept. 16 Cloudy
Cloudy
 24° /10° 0 mm 6
Sept. 17 Patchy rain possible
Patchy rain possible
 23° /12° 0.2 mm 5
Sept. 18 Patchy rain possible
Patchy rain possible
 22° /12° 0.6 mm 5
Sept. 19 Overcast
Overcast
 22° /13° 0 mm 5
Sept. 20 Mist
Mist
 23° /8° 0 mm 5
Sept. 21 Mist
Mist
 24° /10° 0 mm 6
Sept. 22 Mist
Mist
 25° /8° 0 mm 6
Sept. 23 Overcast
Overcast
 19° /12° 11.2 mm 5
Sept. 24 Cloudy
Cloudy
 19° /11° 0 mm 4
Sept. 25 Cloudy
Cloudy
 22° /14° 12.5 mm 5
Sept. 26 Overcast
Overcast
 23° /13° 2.9 mm 5
Sept. 27 Overcast
Overcast
 20° /9° 0 mm 5
Sept. 28 Cloudy
Cloudy
 19° /12° 0 mm 5
Sept. 29 Patchy rain possible
Patchy rain possible
 22° /14° 0 mm 5
Sept. 30 Overcast
Overcast
 22° /14° 0 mm 5
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Important Notice
Our weather forecast for Rochester in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Rochester forecast closer to your planned date for the most up-to-date weather information.

Rochester in September - FAQ

What are the expected maximum and minimum temperatures in Rochester during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Rochester during September?
In September, Rochester can expect light to moderate rainfall, totaling 29.2 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Rochester during September?
The average wind speed in Rochester during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

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Location coordinates Where is Rochester?

Get accurate weather forecasts for Rochester, located at latitude 43.155 and longitude -77.616. Stay updated with localized weather information tailored for Rochester.

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