Rochester, NY weather in August
Expect warm weather with frequent rain in Rochester in August, with highs near 81°F and lows near 61°F. Rain falls on about 10 days. It is one of the warmest months in Rochester. Good for outdoor plans.
- Normal high
- 81°F
- Normal low
- 61°F
- Wet days
- 10
- 3.3 in total
- Muggy days
- 7
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 82°F | 78°F |
| Normal low | 62°F | 59°F |
| Chance of a wet day | 36% | 33% |
| Sunrise / sunset | 6:01 am / 8:32 pm | 6:33 am / 7:47 pm |
| Daylight | 14.5 h | 13.2 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical August day
- 6 am62°Fdew point 59°F
- 9 am71°Fdew point 61°F
- Noon76°Fdew point 60°F
- 3 pm78°Fdew point 60°F
- 6 pm75°Fdew point 60°F
- 9 pm68°Fdew point 61°F
NOAA hourly normals (local standard time) from Rochester Gtr Intl Airport (4 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F11 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph12 of 31
- Hot dayshigh 90°F or more2 of 31
- Muggy daysdaily mean dew point 65°F or more7 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 3.3 in; a dry August brings about 2.7 in and a wet one about 4.3 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202016: average high 87°F
- Coolest August2004: average high 75°F
- Wettest August1999: 5.7 in
- Driest August2007: 0.8 in
- Highest reading97°F (August 14, 2002)
- Lowest reading45°F (August 21, 2000)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 83°F | 81°F | 74°F |
| Normal low | 62°F | 61°F | 54°F |
| Wet days | 11 | 10 | 11 |
| Comfortable days | 8 | 11 | 16 |
| Daylight | 15.0 h | 13.9 h | 12.5 h |
Highs change by -2°F from July and -7°F into September.
Nearby alternatives in August
- Cooler: Lake Placid, NY197 mi · high 73°F · 13 wet days
How Rochester ranks in August
- Normal high303rd warmest of 378 cities; 5th of 10 in New York
- Wet days279th driest of 378
- Comfortable days61st most of 341
What to pack for Rochester in August
- A rain jacket or umbrella – rain on about 10 days
- A swimsuit – about 12 beach days
Heating and cooling
August has 12 heating degree days and 190 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Rochester in August?
The normal high is 81°F and the normal low is 61°F. From 1991 to 2020 the hottest August reading was 97°F (August 14, 2002).
Does it rain a lot in Rochester in August?
About 10 days in August have at least 0.01 in of precipitation, and the normal total is 3.3 in. The wettest August in 1991-2020 was in 1999 (5.7 in); the driest was in 2007 (0.8 in).
Is August a good time to visit Rochester?
August ranks 4th of 12 months on our comfort score for Rochester (65 out of 100). It has about 11 comfortable days and about 2 days at 90°F or hotter. The best months are May, June and September.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Rochester Gtr Intl Airport (USW00014768), 4.0 mi SW of the city center, 533 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Greater Rochester International Airport (725290-14768), 4.0 mi SW of the city center, 540 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).