Rochester, MN weather in August
Expect mild weather with frequent rain in Rochester in August, with highs near 78°F and lows near 58°F. Rain falls on about 10 days. It is one of the warmest months in Rochester. Good for outdoor plans.
- Normal high
- 78°F
- Normal low
- 58°F
- Wet days
- 10
- 4.1 in total
- Muggy days
- 8
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 79°F | 76°F |
| Normal low | 60°F | 56°F |
| Chance of a wet day | 34% | 31% |
| Sunrise / sunset | 5:58 am / 8:34 pm | 6:32 am / 7:48 pm |
| Daylight | 14.6 h | 13.3 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical August day
- 6 am61°Fdew point 58°F
- 9 am69°Fdew point 61°F
- Noon75°Fdew point 62°F
- 3 pm76°Fdew point 62°F
- 6 pm73°Fdew point 62°F
- 9 pm66°Fdew point 61°F
NOAA hourly normals (local standard time) from Rochester Intl Airport (8 mi away); average wind 9 mph; clear or few clouds in 65% of daytime hours, mostly cloudy or overcast in 24%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F12 of 31
- Hot dayshigh 90°F or more1 of 31
- Muggy daysdaily mean dew point 65°F or more8 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 4.1 in; a dry August brings about 3.0 in and a wet one about 5.1 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202010: average high 83°F
- Coolest August2004: average high 73°F
- Wettest August2007: 14.1 in
- Driest August2003: 0.3 in
- Highest reading95°F (August 30, 2012)
- Lowest reading39°F (August 21, 2004)
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 | 80°F | 78°F | 72°F |
| Normal low | 61°F | 58°F | 50°F |
| Wet days | 11 | 10 | 9 |
| Comfortable days | 10 | 12 | 15 |
| Daylight | 15.1 h | 14.0 h | 12.5 h |
Highs change by -2°F from July and -6°F into September.
Nearby alternatives in August
- Warmer: Cedar Rapids, IA145 mi · high 83°F · 10 wet days
How Rochester ranks in August
- Normal high329th warmest of 378 cities; 2nd of 3 in Minnesota
- Wet days258th driest of 378
- Comfortable days46th most of 341
What to pack for Rochester in August
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
August has 30 heating degree days and 128 cooling degree days (base 65°F), 2% of the year's total heating and cooling demand.
Questions
How hot is Rochester in August?
The normal high is 78°F and the normal low is 58°F. From 1991 to 2020 the hottest August reading was 95°F (August 30, 2012).
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 4.1 in. The wettest August in 1991-2020 was in 2007 (14.1 in); the driest was in 2003 (0.3 in).
Is August a good time to visit Rochester?
August ranks 4th of 12 months on our comfort score for Rochester (68 out of 100). It has about 12 comfortable days and about 1 day 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, humidity and wind by hour and cloud cover: Rochester Intl Airport (USW00014925), 8.2 mi S of the city center, 1,304 ft (280 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Rochester International Airport (726440-14925), 8.2 mi S of the city center, 1,305 ft (281 ft higher than the city). Hourly observations, 1991-2020.