Climate averages 1991–2020
Saint Joseph weather
in September.
A warm, 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 warm month in Saint Joseph: daytime highs average 25.2°C and nights cool to about 15.7°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 85 mm of rain on roughly 8 days, which makes September a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average September day.
The nearest other city in this atlas is Kansas City (78 km away). In September its highs average 25.6°C, about as warm as Saint Joseph, with 93 mm of rain.
Among the 498 cities listed in the United States, Saint Joseph ranks joint 306th of 498 for the warmest September highs and joint 308th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Saint Joseph is 1.7°C cooler than that mean.
From September to October, average highs fall by 6.9°C to 18.3°C, and monthly rainfall falls from 85 mm to 81 mm.
The annual picture
September in context
Monthly rainfall
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 Joseph climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.1°C-6.8°C | -6.8°C | 30 | 5.4 | 9.710 h |
| February | 4.9°C-4.9°C | -4.9°C | 44 | 6.2 | 10.711 h |
| March | 11.3°C0.9°C | 0.9°C | 76 | 9.0 | 11.912 h |
| April | 17.3°C7.0°C | 7.0°C | 115 | 11.1 | 13.213 h |
| May | 22.8°C13.2°C | 13.2°C | 143 | 12.5 | 14.314 h |
| June | 28.1°C18.8°C | 18.8°C | 114 | 11.1 | 14.915 h |
| July | 30.3°C21.3°C | 21.3°C | 112 | 9.1 | 14.715 h |
| August | 29.4°C20.4°C | 20.4°C | 91 | 9.0 | 13.714 h |
| September, selected | 25.2°C15.7°C | 15.7°C | 85 | 8.2 | 12.512 h |
| October | 18.3°C9.1°C | 9.1°C | 81 | 7.9 | 11.211 h |
| November | 10.7°C2.1°C | 2.1°C | 54 | 6.4 | 10.010 h |
| December | 4.4°C-4.0°C | -4.0°C | 45 | 5.4 | 9.49 h |
Rainfall is the average of the 30 separate monthly totals. A rain 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
- Kansas City in SeptemberUnited States · 78 kmHigh 25.6°C · Low 16.2°C · 93 mm rain
- Independence in SeptemberUnited States · 84 kmHigh 25.2°C · Low 16.1°C · 93 mm rain
- Overland Park in SeptemberUnited States · 89 kmHigh 25.3°C · Low 16.3°C · 93 mm rain
- Lawrence (Kansas), United States in SeptemberUnited States · 95 kmHigh 25.8°C · Low 16.5°C · 90 mm rain
- Olathe in SeptemberUnited States · 99 kmHigh 25.4°C · Low 16.4°C · 93 mm rain
- Lee's Summit in SeptemberUnited States · 103 kmHigh 25.3°C · Low 16.2°C · 93 mm rain
- Topeka in SeptemberUnited States · 107 kmHigh 25.9°C · Low 16.3°C · 87 mm rain
- Omaha in SeptemberUnited States · 190 kmHigh 24.8°C · Low 14.8°C · 77 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 Joseph) is explained once on the Saint Joseph year overview and on the Sources, method and limits page.