Lee's Summit, MO weather in September
Expect mild weather with some rain in Lee's Summit in September, with highs near 78°F and lows near 57°F. Rain falls on about 7 days. Good for outdoor plans.
- Normal high
- 78°F
- Normal low
- 57°F
- Wet days
- 7
- 4.3 in total
- Muggy days
- 8
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 83°F | 73°F |
| Normal low | 62°F | 52°F |
| Chance of a wet day | 23% | 22% |
| Sunrise / sunset | 6:46 am / 7:48 pm | 7:12 am / 7:02 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 (19 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°F10 of 30
- Hot dayshigh 90°F or more3 of 30
- Muggy daysdaily mean dew point 65°F or more8 of 30
- Wet daysat least 0.01 in of rain or melted snow7 of 30
- Notable rainat least 0.10 in5 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 4.3 in; a dry September brings about 2.4 in and a wet one about 5.9 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 84°F
- Coolest September1993: average high 73°F
- Wettest September1993: 11.3 in
- Driest September2017: 1.2 in
- Highest reading103°F (September 3, 2000)
- Lowest reading33°F (September 23, 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 | 86°F | 78°F | 67°F |
| Normal low | 66°F | 57°F | 45°F |
| Wet days | 7 | 7 | 7 |
| Comfortable days | 3 | 10 | 14 |
| Daylight | 13.6 h | 12.4 h | 11.2 h |
Highs change by -8°F from August and -11°F into October.
Nearby alternatives in September
- Warmer: Branson, MO169 mi · high 84°F · 7 wet days
How Lee's Summit ranks in September
- Normal high218th warmest of 378 cities; 7th of 7 in Missouri
- Wet days140th driest of 378
- Comfortable days156th most of 342
Heating and cooling
September has 63 heating degree days and 144 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Lee's Summit in September?
The normal high is 78°F and the normal low is 57°F. From 1991 to 2020 the hottest September reading was 103°F (September 3, 2000).
Does it rain a lot in Lee's Summit in September?
About 7 days in September have at least 0.01 in of precipitation, and the normal total is 4.3 in. The wettest September in 1991-2020 was in 1993 (11.3 in); the driest was in 2017 (1.2 in).
Is September a good time to visit Lee's Summit?
September ranks 4th of 12 months on our comfort score for Lee's Summit (60 out of 100). It has about 10 comfortable days and about 3 days at 90°F or hotter. The best months are April and May.
Where the numbers come from
- Temperature: Independence (USC00234154), 11 mi N of the city center, 985 ft (54 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain and snowfall: Unity Village (USC00238524), 2.7 mi NNW of the city center, 942 ft (97 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snow depth: Pleasant Hill WFO (USC00236745), 9.4 mi SE of the city center, 1,000 ft . NOAA normals and daily records, 1991-2020.
- Frost dates: Lees Summit Muni Airport (USW00053879), 3.4 mi N of the city center, 997 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Kansas City Downtown Airport (USW00013988), 19 mi NW of the city center, 742 ft (297 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: C.r. Wheeler Downtown Arpt (724463-13988), 19 mi NW of the city center, 742 ft (297 ft lower than the city). Hourly observations, 1991-2020.