Climate averages 1991–2020
Saint Paul weather
in September.
A mild, moderately wet month: the 4th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Saint Paul: daytime highs average 21.8°C and nights cool to about 13.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 86 mm of rain on roughly 10 days, which makes September a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 35 min on an average September day.
The nearest other city in this atlas is Minneapolis (14 km away). In September its highs average 21.8°C, about as warm as Saint Paul, with 84 mm of rain.
Among the 498 cities listed in the United States, Saint Paul ranks joint 465th of 498 for the warmest September highs and joint 314th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Saint Paul is 5.1°C cooler than that mean.
From September to October, average highs fall by 8.1°C to 13.7°C, and monthly rainfall falls from 86 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
Saint Paul climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -5.1°C-13.5°C | -13.5°C | 25 | 6.0 | 9.29 h |
| February | -2.1°C-11.2°C | -11.2°C | 27 | 5.0 | 10.410 h |
| March | 5.0°C-4.6°C | -4.6°C | 52 | 7.7 | 11.912 h |
| April | 12.6°C2.6°C | 2.6°C | 81 | 10.6 | 13.513 h |
| May | 19.5°C9.9°C | 9.9°C | 110 | 12.0 | 14.815 h |
| June | 24.9°C15.9°C | 15.9°C | 110 | 11.9 | 15.516 h |
| July | 27.3°C18.6°C | 18.6°C | 89 | 10.5 | 15.215 h |
| August | 26.1°C17.6°C | 17.6°C | 98 | 10.0 | 14.114 h |
| September, selected | 21.8°C13.4°C | 13.4°C | 86 | 9.5 | 12.613 h |
| October | 13.7°C6.1°C | 6.1°C | 68 | 8.9 | 11.011 h |
| November | 4.9°C-1.9°C | -1.9°C | 49 | 6.7 | 9.610 h |
| December | -2.2°C-9.6°C | -9.6°C | 35 | 6.1 | 8.99 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
- Minneapolis in SeptemberUnited States · 14 kmHigh 21.8°C · Low 13.4°C · 84 mm rain
- Bloomington (Minnesota), United States in SeptemberUnited States · 20 kmHigh 21.9°C · Low 13.8°C · 82 mm rain
- Brooklyn Park in SeptemberUnited States · 27 kmHigh 21.6°C · Low 13.3°C · 84 mm rain
- Plymouth, United States in SeptemberUnited States · 29 kmHigh 21.5°C · Low 13.3°C · 82 mm rain
- Rochester (Minnesota), United States in SeptemberUnited States · 114 kmHigh 21.4°C · Low 12.9°C · 84 mm rain
- Duluth in SeptemberUnited States · 218 kmHigh 19.5°C · Low 13.8°C · 92 mm rain
- Sioux Falls in SeptemberUnited States · 329 kmHigh 22.6°C · Low 12.8°C · 80 mm rain
- Cedar Rapids in SeptemberUnited States · 347 kmHigh 23.2°C · Low 13.7°C · 100 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 Saint Paul) is explained once on the Saint Paul year overview and on the Sources, method and limits page.