Rochester weather in August: Rochester, New York: normal highs, lows, rain and records for August
Rochester in August has a normal high of 81°F and a normal low of 61°F, a daily mean of 71°F, falling from 82°F on the 1st to 78°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 3.31 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 16°C, 84 mm of precipitation in August.
- NOAA stationFrederick Douglass Greater Rochester International Airport
- Station IDUSW00014768
- Location43.12°N 77.68°W
- Elevation533 ft (163 m)
- From the center5 miles
- Population207,282
- Jan 33° 19°
- Feb 35° 20°
- Mar 44° 27°
- Apr 57° 37°
- May 69° 48°
- Jun 78° 57°
- Jul 83° 62°
- Aug 81° 61°
- Sep 74° 54°
- Oct 61° 43°
- Nov 49° 34°
- Dec 39° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Rochester in August?
The normal high is 81°F and the normal low 61°F, for a daily mean of 70.7°F. August is 1.6°F cooler than July and 7.1°F warmer than September. August is the 2nd warmest month of the year in Rochester and the 3rd wettest. Across the month the normal high falls 4°F, from 82°F on August 1 to 78°F on August 31. From one year to the next August's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 68°F and 73°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 82°F | 62°F | 37% | 22% |
| August 8 | 82°F | 62°F | 36% | 22% |
| August 15 | 81°F | 61°F | 35% | 21% |
| August 22 | 80°F | 60°F | 34% | 20% |
| August 31 | 78°F | 59°F | 34% | 19% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 82°F | 62°F | 37% | 22% | 14 h 30 min |
| August 2 | 82°F | 62°F | 37% | 22% | 14 h 30 min |
| August 3 | 82°F | 62°F | 37% | 22% | 14 h 30 min |
| August 4 | 82°F | 62°F | 36% | 22% | 14 h 30 min |
| August 5 | 82°F | 62°F | 36% | 22% | 14 h 20 min |
| August 6 | 82°F | 62°F | 36% | 22% | 14 h 20 min |
| August 7 | 82°F | 62°F | 36% | 22% | 14 h 20 min |
| August 8 | 82°F | 62°F | 36% | 22% | 14 h 20 min |
| August 9 | 81°F | 62°F | 36% | 22% | 14 h 20 min |
| August 10 | 81°F | 62°F | 35% | 22% | 14 h 10 min |
| August 11 | 81°F | 62°F | 35% | 21% | 14 h 10 min |
| August 12 | 81°F | 62°F | 35% | 21% | 14 h 10 min |
| August 13 | 81°F | 62°F | 35% | 21% | 14 h 10 min |
| August 14 | 81°F | 62°F | 35% | 21% | 14 h |
| August 15 | 81°F | 61°F | 35% | 21% | 14 h |
| August 16 | 81°F | 61°F | 35% | 21% | 14 h |
| August 17 | 81°F | 61°F | 34% | 21% | 14 h |
| August 18 | 80°F | 61°F | 34% | 20% | 13 h 50 min |
| August 19 | 80°F | 61°F | 34% | 20% | 13 h 50 min |
| August 20 | 80°F | 61°F | 34% | 20% | 13 h 50 min |
| August 21 | 80°F | 61°F | 34% | 20% | 13 h 40 min |
| August 22 | 80°F | 60°F | 34% | 20% | 13 h 40 min |
| August 23 | 80°F | 60°F | 34% | 20% | 13 h 40 min |
| August 24 | 80°F | 60°F | 34% | 20% | 13 h 40 min |
| August 25 | 80°F | 60°F | 33% | 19% | 13 h 30 min |
| August 26 | 79°F | 60°F | 33% | 19% | 13 h 30 min |
| August 27 | 79°F | 60°F | 33% | 19% | 13 h 30 min |
| August 28 | 79°F | 59°F | 33% | 19% | 13 h 30 min |
| August 29 | 79°F | 59°F | 33% | 19% | 13 h 20 min |
| August 30 | 79°F | 59°F | 34% | 19% | 13 h 20 min |
| August 31 | 78°F | 59°F | 34% | 19% | 13 h 20 min |
- Normal high
- 81°FAugust average
- Normal low
- 61°FAugust average
- Precipitation
- 3.31 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 14 h 30 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 17
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014768; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Rochester in August?
On a given August day the chance of 0.01 inch or more is 35% on average, highest around August 1 (37%). In all, 3.31 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in Rochester, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014768.
How humid and windy is Rochester in August?
At 3 p.m. the normal temperature is 76°F with 55% relative humidity and a dew point of 59°F; at 6 a.m. it is 60°F with 89% humidity. The wind averages 7.1 mph, most often from the west-northwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 60°F | 57°F | 89% | 5.8 mph | 34% |
| 9 a.m. | 69°F | 60°F | 74% | 8.3 mph | 33% |
| noon | 75°F | 59°F | 58% | 9.1 mph | 20% |
| 3 p.m. | 76°F | 59°F | 55% | 10.1 mph | 24% |
| 6 p.m. | 73°F | 59°F | 61% | 7.9 mph | 38% |
| 9 p.m. | 66°F | 59°F | 79% | 5.2 mph | 48% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014768. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Rochester?
The warmest August temperature on Rochester's official record (since 1872) is 99°F, on August 28, 1948; the coldest is 36°F, on August 30, 1965. The wettest August brought 7.25 in (1886).
The August mean against the 1991-2020 normal of 70.7°F: 2021 73.8°F (+3.1), 2022 72.5°F (+1.8), 2023 68.6°F (−2.1), 2024 70.8°F (+0.1), 2025 68.7°F (−2.0), 2026 69.8°F (−0.9). 3 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 73.8°F | +3.1°F | 2.55 in |
| 2022 | 72.5°F | +1.8°F | 3.37 in |
| 2023 | 68.6°F | −2.1°F | 5.44 in |
| 2024 | 70.8°F | +0.1°F | 3.53 in |
| 2025 | 68.7°F | −2.0°F | 1.65 in |
| 2026 | 69.8°F | −0.9°F | 2.99 in |
Source: records: ACIS, NWS threaded record ROCthr; recent months: ACIS, station USW00014768. Records and recent months use complete months only.
How does August in Rochester compare across New York?
Across the 131 places PlainClimate covers in New York, August normal highs run from 71°F in Cooperstown to 85°F in Mineola; Rochester's is 81°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.