Climate averages 1991–2020
Rochester (Minnesota), United States weather
in September.
A mild, moderately wet month: the 4th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Rochester (Minnesota), United States: daytime highs average 21.4°C and nights cool to about 12.9°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 84 mm of rain on roughly 9 days, which makes September a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 34 min on an average September day.
The nearest other city in this atlas is Bloomington (Minnesota), United States (112 km away). In September its highs average 21.9°C, about as warm as Rochester (Minnesota), United States, with 82 mm of rain.
Among the 498 cities listed in the United States, Rochester (Minnesota), United States ranks joint 473rd of 498 for the warmest September highs and joint 300th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Rochester (Minnesota), United States is 5.5°C cooler than that mean.
From September to October, average highs fall by 7.7°C to 13.7°C, and monthly rainfall falls from 84 mm to 68 mm.
The annual picture
September 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 (Minnesota), United States climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -4.8°C-13.1°C | -13.1°C | 29 | 6.7 | 9.39 h |
| February | -2.1°C-10.8°C | -10.8°C | 30 | 5.8 | 10.410 h |
| March | 5.1°C-4.3°C | -4.3°C | 60 | 8.8 | 11.912 h |
| April | 12.6°C2.7°C | 2.7°C | 92 | 11.4 | 13.413 h |
| May | 19.2°C9.7°C | 9.7°C | 115 | 13.0 | 14.715 h |
| June | 24.4°C15.5°C | 15.5°C | 131 | 12.3 | 15.415 h |
| July | 26.5°C18.0°C | 18.0°C | 97 | 10.4 | 15.115 h |
| August | 25.4°C17.0°C | 17.0°C | 96 | 10.0 | 14.014 h |
| September, selected | 21.4°C12.9°C | 12.9°C | 84 | 9.3 | 12.613 h |
| October | 13.7°C5.8°C | 5.8°C | 68 | 9.0 | 11.011 h |
| November | 5.3°C-1.8°C | -1.8°C | 49 | 6.9 | 9.710 h |
| December | -1.9°C-9.2°C | -9.2°C | 37 | 7.1 | 9.09 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
September in nearby cities
- Bloomington (Minnesota), United States in SeptemberUnited States · 112 kmHigh 21.9°C · Low 13.8°C · 82 mm rain
- Saint Paul in SeptemberUnited States · 114 kmHigh 21.8°C · Low 13.4°C · 86 mm rain
- Minneapolis in SeptemberUnited States · 124 kmHigh 21.8°C · Low 13.4°C · 84 mm rain
- Plymouth, United States in SeptemberUnited States · 135 kmHigh 21.5°C · Low 13.3°C · 82 mm rain
- Brooklyn Park in SeptemberUnited States · 138 kmHigh 21.6°C · Low 13.3°C · 84 mm rain
- Cedar Rapids in SeptemberUnited States · 234 kmHigh 23.2°C · Low 13.7°C · 100 mm rain
- Madison in SeptemberUnited States · 269 kmHigh 22.1°C · Low 13.1°C · 84 mm rain
- Iowa City in SeptemberUnited States · 273 kmHigh 23.7°C · Low 14.2°C · 99 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 (Minnesota), United States year overview and on the Sources, method and limits page.