Climate averages 1991–2020
Rochester (New York), United States weather
in August.
A warm, moderately wet month: the 2nd warmest and the joint 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Rochester (New York), United States: daytime highs average 25.1°C and nights cool to about 17.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 80 mm of rain on roughly 12 days, which makes August a moderately wet month (the joint 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 57 min on an average August day.
The nearest other city in this atlas is Cheektowaga (97 km away). In August its highs average 24.8°C, about as warm as Rochester (New York), United States, with 80 mm of rain.
Among the 498 cities listed in the United States, Rochester (New York), United States ranks 469th of 498 for the warmest August highs and joint 261st of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Rochester (New York), United States is 4.8°C cooler than that mean.
From August to September, average highs fall by 3.5°C to 21.6°C, and monthly rainfall rises from 80 mm to 88 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Rochester (New York), United States climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.2°C-6.7°C | -6.7°C | 85 | 15.5 | 9.49 h |
| February | 0.4°C-7.1°C | -7.1°C | 67 | 11.1 | 10.510 h |
| March | 4.5°C-3.4°C | -3.4°C | 80 | 11.6 | 11.912 h |
| April | 10.9°C2.6°C | 2.6°C | 100 | 11.8 | 13.413 h |
| May | 17.3°C9.0°C | 9.0°C | 81 | 11.4 | 14.615 h |
| June | 22.5°C14.8°C | 14.8°C | 89 | 11.5 | 15.315 h |
| July | 25.7°C18.2°C | 18.2°C | 89 | 11.1 | 15.015 h |
| August, selected | 25.1°C17.8°C | 17.8°C | 80 | 11.7 | 13.914 h |
| September | 21.6°C14.3°C | 14.3°C | 88 | 10.7 | 12.513 h |
| October | 14.8°C8.4°C | 8.4°C | 109 | 13.3 | 11.111 h |
| November | 8.2°C2.3°C | 2.3°C | 95 | 14.0 | 9.810 h |
| December | 2.6°C-2.7°C | -2.7°C | 95 | 15.9 | 9.19 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Cheektowaga in AugustUnited States · 97 kmHigh 24.8°C · Low 17.5°C · 80 mm rain
- Amherst in AugustUnited States · 98 kmHigh 25.0°C · Low 17.7°C · 80 mm rain
- Buffalo in AugustUnited States · 107 kmHigh 24.5°C · Low 18.2°C · 85 mm rain
- Niagara Falls in AugustCanada · 118 kmHigh 24.9°C · Low 18.5°C · 85 mm rain
- Syracuse in AugustUnited States · 120 kmHigh 25.4°C · Low 17.5°C · 100 mm rain
- Oshawa in AugustCanada · 129 kmHigh 24.6°C · Low 17.9°C · 80 mm rain
- St. Catharines in AugustCanada · 132 kmHigh 25.1°C · Low 19.1°C · 75 mm rain
- Whitby in AugustCanada · 134 kmHigh 24.8°C · Low 18.0°C · 85 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rochester) is explained once on the Rochester (New York), United States year overview and on the Sources, method and limits page.