Rochester weather in August: Rochester, Minnesota: normal highs, lows, rain and records for August
Rochester in August has a normal high of 78°F and a normal low of 58°F, a daily mean of 68°F, falling from 79°F on the 1st to 76°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 4.12 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 15°C, 105 mm of precipitation in August.
- NOAA stationRochester International Airport
- Station IDUSW00014925
- Location43.90°N 92.49°W
- Elevation1,304 ft (398 m)
- Population123,624
- Jan 23° 7°
- Feb 27° 11°
- Mar 40° 23°
- Apr 55° 35°
- May 68° 47°
- Jun 78° 58°
- Jul 80° 61°
- Aug 78° 58°
- Sep 72° 50°
- Oct 58° 38°
- Nov 42° 26°
- Dec 28° 14°
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 78°F and the normal low 58°F, for a daily mean of 68.2°F. August is 2.3°F cooler than July and 7.1°F warmer than September. August is the 2nd warmest month of the year in Rochester and the 4th wettest. Across the month the normal high falls 3°F, from 79°F on August 1 to 76°F on August 31. From one year to the next August's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 66°F and 71°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 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 79°F | 60°F | 34% | 21% |
| August 8 | 79°F | 59°F | 34% | 20% |
| August 15 | 78°F | 59°F | 33% | 20% |
| August 22 | 78°F | 58°F | 32% | 20% |
| August 31 | 76°F | 56°F | 31% | 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 | 79°F | 60°F | 34% | 21% | 14 h 40 min |
| August 2 | 79°F | 60°F | 34% | 21% | 14 h 40 min |
| August 3 | 79°F | 60°F | 34% | 21% | 14 h 30 min |
| August 4 | 79°F | 60°F | 34% | 21% | 14 h 30 min |
| August 5 | 79°F | 60°F | 34% | 21% | 14 h 30 min |
| August 6 | 79°F | 60°F | 34% | 20% | 14 h 30 min |
| August 7 | 79°F | 60°F | 34% | 20% | 14 h 20 min |
| August 8 | 79°F | 59°F | 34% | 20% | 14 h 20 min |
| August 9 | 79°F | 59°F | 33% | 20% | 14 h 20 min |
| August 10 | 79°F | 59°F | 33% | 20% | 14 h 20 min |
| August 11 | 79°F | 59°F | 33% | 20% | 14 h 10 min |
| August 12 | 78°F | 59°F | 33% | 20% | 14 h 10 min |
| August 13 | 78°F | 59°F | 33% | 20% | 14 h 10 min |
| August 14 | 78°F | 59°F | 33% | 20% | 14 h 10 min |
| August 15 | 78°F | 59°F | 33% | 20% | 14 h |
| August 16 | 78°F | 59°F | 33% | 20% | 14 h |
| August 17 | 78°F | 58°F | 32% | 20% | 14 h |
| August 18 | 78°F | 58°F | 32% | 20% | 14 h |
| August 19 | 78°F | 58°F | 32% | 20% | 13 h 50 min |
| August 20 | 78°F | 58°F | 32% | 20% | 13 h 50 min |
| August 21 | 78°F | 58°F | 32% | 20% | 13 h 50 min |
| August 22 | 78°F | 58°F | 32% | 20% | 13 h 40 min |
| August 23 | 77°F | 57°F | 31% | 19% | 13 h 40 min |
| August 24 | 77°F | 57°F | 31% | 19% | 13 h 40 min |
| August 25 | 77°F | 57°F | 31% | 19% | 13 h 40 min |
| August 26 | 77°F | 57°F | 31% | 19% | 13 h 30 min |
| August 27 | 77°F | 57°F | 31% | 19% | 13 h 30 min |
| August 28 | 77°F | 56°F | 31% | 19% | 13 h 30 min |
| August 29 | 77°F | 56°F | 31% | 19% | 13 h 20 min |
| August 30 | 76°F | 56°F | 31% | 19% | 13 h 20 min |
| August 31 | 76°F | 56°F | 31% | 19% | 13 h 20 min |
- Normal high
- 78°FAugust average
- Normal low
- 58°FAugust average
- Precipitation
- 4.12 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 14 h 40 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 29
- Days at 80°F or more
- 12
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014925; 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 32% on average, highest around August 1 (34%). In all, 4.12 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in Rochester, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014925.
How humid and windy is Rochester in August?
At 3 p.m. the normal temperature is 76°F with 58% relative humidity and a dew point of 60°F; at 6 a.m. it is 59°F with 91% humidity. The wind averages 9.2 mph, most often from the south-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 59°F | 56°F | 91% | 8.5 mph | 66% |
| 9 a.m. | 68°F | 60°F | 76% | 10.0 mph | 73% |
| noon | 74°F | 60°F | 62% | 11.1 mph | 63% |
| 3 p.m. | 76°F | 60°F | 58% | 11.2 mph | 72% |
| 6 p.m. | 71°F | 61°F | 69% | 8.2 mph | 75% |
| 9 p.m. | 64°F | 59°F | 84% | 7.9 mph | 82% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014925. 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 1886) is 100°F, on August 3, 1930; the coldest is 32°F, on August 30, 1915. The wettest August brought 14.07 in (2007).
The August mean against the 1991-2020 normal of 68.2°F: 2021 69.1°F (+0.9), 2022 68.0°F (−0.2), 2023 70.6°F (+2.4), 2024 68.5°F (+0.3), 2025 68.3°F (+0.1), 2026 70.0°F (+1.8). 5 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 69.1°F | +0.9°F | 6.74 in |
| 2022 | 68.0°F | −0.2°F | 6.53 in |
| 2023 | 70.6°F | +2.4°F | 1.51 in |
| 2024 | 68.5°F | +0.3°F | 4.92 in |
| 2025 | 68.3°F | +0.1°F | 6.81 in |
| 2026 | 70.0°F | +1.8°F | 1.24 in |
Source: records: ACIS, NWS threaded record RSTthr; recent months: ACIS, station USW00014925. Records and recent months use complete months only.
How does August in Rochester compare across Minnesota?
Across the 129 places PlainClimate covers in Minnesota, August normal highs run from 70°F in Grand Marais to 82°F in Little Falls; Rochester's is 78°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.