Lee's Summit weather in September: Lee's Summit, Missouri: normal highs, lows, rain and records for September
Lee's Summit in September has a normal high of 79°F and a normal low of 59°F, a daily mean of 69°F, falling from 84°F on the 1st to 74°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 3.07 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 15°C, 78 mm of precipitation in September.
- NOAA stationLees Summit Municipal Airport
- Station IDUSW00053879
- Location38.96°N 94.37°W
- Elevation997 ft (304 m)
- From the center3 miles
- Population106,419
- Jan 39° 22°
- Feb 44° 26°
- Mar 55° 35°
- Apr 66° 46°
- May 75° 56°
- Jun 84° 65°
- Jul 88° 70°
- Aug 87° 68°
- Sep 79° 59°
- Oct 67° 47°
- Nov 54° 36°
- Dec 43° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lee's Summit in September?
The normal high is 79°F and the normal low 59°F, for a daily mean of 69.0°F. September is 8.3°F cooler than August and 11.8°F warmer than October. September is the 4th warmest month of the year in Lee's Summit and the 7th wettest. Across the month the normal high falls 10°F, from 84°F on September 1 to 74°F on September 30. From one year to the next September's mean temperature typically moves about 3.4°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 66°F and 72°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 84°F | 64°F | 32% | 19% |
| September 8 | 82°F | 62°F | 31% | 19% |
| September 15 | 79°F | 59°F | 31% | 18% |
| September 22 | 77°F | 57°F | 30% | 17% |
| September 30 | 74°F | 53°F | 30% | 17% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 84°F | 64°F | 32% | 19% | 13 h |
| September 2 | 84°F | 64°F | 32% | 19% | 13 h |
| September 3 | 83°F | 64°F | 32% | 19% | 13 h |
| September 4 | 83°F | 63°F | 32% | 19% | 13 h |
| September 5 | 83°F | 63°F | 32% | 19% | 13 h |
| September 6 | 82°F | 63°F | 31% | 19% | 12 h 50 min |
| September 7 | 82°F | 62°F | 31% | 19% | 12 h 50 min |
| September 8 | 82°F | 62°F | 31% | 19% | 12 h 50 min |
| September 9 | 81°F | 62°F | 31% | 19% | 12 h 50 min |
| September 10 | 81°F | 61°F | 31% | 19% | 12 h 40 min |
| September 11 | 81°F | 61°F | 31% | 19% | 12 h 40 min |
| September 12 | 80°F | 61°F | 31% | 18% | 12 h 40 min |
| September 13 | 80°F | 60°F | 31% | 18% | 12 h 40 min |
| September 14 | 80°F | 60°F | 31% | 18% | 12 h 30 min |
| September 15 | 79°F | 59°F | 31% | 18% | 12 h 30 min |
| September 16 | 79°F | 59°F | 31% | 18% | 12 h 30 min |
| September 17 | 79°F | 59°F | 31% | 18% | 12 h 30 min |
| September 18 | 78°F | 58°F | 31% | 18% | 12 h 20 min |
| September 19 | 78°F | 58°F | 31% | 18% | 12 h 20 min |
| September 20 | 78°F | 57°F | 30% | 18% | 12 h 20 min |
| September 21 | 77°F | 57°F | 30% | 18% | 12 h 20 min |
| September 22 | 77°F | 57°F | 30% | 17% | 12 h 10 min |
| September 23 | 76°F | 56°F | 30% | 17% | 12 h 10 min |
| September 24 | 76°F | 56°F | 30% | 17% | 12 h 10 min |
| September 25 | 76°F | 55°F | 30% | 17% | 12 h 10 min |
| September 26 | 75°F | 55°F | 30% | 17% | 12 h |
| September 27 | 75°F | 55°F | 30% | 17% | 12 h |
| September 28 | 75°F | 54°F | 30% | 17% | 12 h |
| September 29 | 74°F | 54°F | 30% | 17% | 12 h |
| September 30 | 74°F | 53°F | 30% | 17% | 11 h 50 min |
- Normal high
- 79°FSeptember average
- Normal low
- 59°FSeptember average
- Precipitation
- 3.07 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 27
- Days at 80°F or more
- 15
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00053879; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lee's Summit in September?
On a given September day the chance of 0.01 inch or more is 31% on average, highest around September 1 (32%). In all, 3.07 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Lee's Summit, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053879.
What are the records for September in Lee's Summit?
The September mean against the 1991-2020 normal of 69.0°F: 2021 73.1°F (+4.1), 2022 71.4°F (+2.4), 2023 73.2°F (+4.2), 2024 72.9°F (+3.9), 2026 77.3°F (+8.3). 5 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 73.1°F | +4.1°F | 3.84 in |
| 2022 | 71.4°F | +2.4°F | 0.50 in |
| 2023 | 73.2°F | +4.2°F | 3.86 in |
| 2024 | 72.9°F | +3.9°F | 2.26 in |
| 2026 | 77.3°F | +8.3°F | 3.44 in |
Source: recent months: ACIS, station USW00053879. Records and recent months use complete months only.
How does September in Lee's Summit compare across Missouri?
Across the 134 places PlainClimate covers in Missouri, September normal highs run from 76°F in Unionville to 85°F in Kennett; Lee's Summit's is 79°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Lee's Summit in August87°F by day, 68°F at night
- Lee's Summit in October67°F by day, 47°F at night
- Lee's Summit through the yearEvery month, frost dates, records and recent years
- Missouri in SeptemberThe statewide normal and the warmest and coolest places
- Kennett: Missouri's warmest Septembernormal high 85°F