Kansas City, MO weather in September
Expect warm weather with some rain in Kansas City in September, with highs near 80°F and lows near 61°F. Rain falls on about 8 days. Good for outdoor plans.
- Normal high
- 80°F
- Normal low
- 61°F
- Wet days
- 8
- 3.8 in total
- Muggy days
- 8
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 85°F | 75°F |
| Normal low | 66°F | 55°F |
| Chance of a wet day | 26% | 24% |
| Sunrise / sunset | 6:47 am / 7:49 pm | 7:13 am / 7:03 pm |
| Daylight | 13.0 h | 11.8 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 September day
- 6 am63°Fdew point 57°F
- 9 am70°Fdew point 58°F
- Noon76°Fdew point 58°F
- 3 pm79°Fdew point 58°F
- 6 pm76°Fdew point 57°F
- 9 pm70°Fdew point 58°F
NOAA hourly normals (local standard time) from Kansas City Downtown Airport (2 mi away); average wind 8 mph; clear or few clouds in 72% of daytime hours, mostly cloudy or overcast in 23%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F11 of 30
- Hot dayshigh 90°F or more5 of 30
- Muggy daysdaily mean dew point 65°F or more8 of 30
- Wet daysat least 0.01 in of rain or melted snow8 of 30
- Notable rainat least 0.10 in6 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 3.8 in; a dry September brings about 2.2 in and a wet one about 4.2 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202019: average high 87°F
- Coolest September1993: average high 74°F
- Wettest September2008: 11.9 in
- Driest September2011: 0.9 in
- Highest reading106°F (September 2, 2000)
- Lowest reading36°F (September 22, 1995)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 89°F | 80°F | 68°F |
| Normal low | 70°F | 61°F | 49°F |
| Wet days | 8 | 8 | 7 |
| Comfortable days | 2 | 11 | 15 |
| Daylight | 13.7 h | 12.4 h | 11.2 h |
Highs change by -9°F from August and -12°F into October.
How Kansas City ranks in September
- Normal high191st warmest of 378 cities; 4th of 7 in Missouri
- Wet days180th driest of 378
- Comfortable days149th most of 342
Heating and cooling
September has 35 heating degree days and 206 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Kansas City in September?
The normal high is 80°F and the normal low is 61°F. From 1991 to 2020 the hottest September reading was 106°F (September 2, 2000).
Does it rain a lot in Kansas City in September?
About 8 days in September have at least 0.01 in of precipitation, and the normal total is 3.8 in. The wettest September in 1991-2020 was in 2008 (11.9 in); the driest was in 2011 (0.9 in).
Is September a good time to visit Kansas City?
September ranks 4th of 12 months on our comfort score for Kansas City (60 out of 100). It has about 11 comfortable days and about 5 days at 90°F or hotter. The best months are April and May.
Where the numbers come from
- Temperature, rain, frost dates, humidity and wind by hour and cloud cover: Kansas City Downtown Airport (USW00013988), 1.8 mi NW of the city center, 742 ft (156 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Kansas City Intl Airport (USW00003947), 16 mi NNW of the city center, 1,005 ft (107 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: C.r. Wheeler Downtown Arpt (724463-13988), 2.0 mi NNW of the city center, 742 ft (156 ft lower than the city). Hourly observations, 1991-2020.