Cape Girardeau weather in September: Cape Girardeau, Missouri: normal highs, lows, rain and records for September
Cape Girardeau in September has a normal high of 82°F and a normal low of 58°F, a daily mean of 70°F, falling from 86°F on the 1st to 77°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 3.61 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 14°C, 92 mm of precipitation in September.
- NOAA stationCape Girardeau Municipal Airport
- Station IDUSW00003935
- Location37.23°N 89.57°W
- Elevation336 ft (102 m)
- Population40,818
- Jan 43° 26°
- Feb 48° 30°
- Mar 58° 37°
- Apr 69° 47°
- May 78° 58°
- Jun 87° 66°
- Jul 89° 69°
- Aug 88° 66°
- Sep 82° 58°
- Oct 71° 46°
- Nov 57° 37°
- Dec 46° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Cape Girardeau in September?
The normal high is 82°F and the normal low 58°F, for a daily mean of 69.7°F. September is 7.7°F cooler than August and 11.1°F warmer than October. September is the 4th warmest month of the year in Cape Girardeau and the 8th wettest. Across the month the normal high falls 9°F, from 86°F on September 1 to 77°F on September 30. From one year to the next September's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 67°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 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 86°F | 63°F | 25% | 16% |
| September 8 | 84°F | 61°F | 25% | 16% |
| September 15 | 82°F | 58°F | 25% | 16% |
| September 22 | 80°F | 55°F | 26% | 17% |
| September 30 | 77°F | 52°F | 25% | 16% |
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 | 86°F | 63°F | 25% | 16% | 13 h |
| September 2 | 86°F | 63°F | 25% | 16% | 13 h |
| September 3 | 86°F | 62°F | 25% | 16% | 13 h |
| September 4 | 85°F | 62°F | 25% | 16% | 12 h 50 min |
| September 5 | 85°F | 62°F | 25% | 16% | 12 h 50 min |
| September 6 | 85°F | 61°F | 25% | 16% | 12 h 50 min |
| September 7 | 84°F | 61°F | 25% | 16% | 12 h 50 min |
| September 8 | 84°F | 61°F | 25% | 16% | 12 h 50 min |
| September 9 | 84°F | 60°F | 25% | 16% | 12 h 40 min |
| September 10 | 84°F | 60°F | 25% | 16% | 12 h 40 min |
| September 11 | 83°F | 60°F | 25% | 16% | 12 h 40 min |
| September 12 | 83°F | 59°F | 25% | 16% | 12 h 40 min |
| September 13 | 83°F | 59°F | 25% | 16% | 12 h 30 min |
| September 14 | 82°F | 58°F | 25% | 16% | 12 h 30 min |
| September 15 | 82°F | 58°F | 25% | 16% | 12 h 30 min |
| September 16 | 82°F | 58°F | 25% | 16% | 12 h 30 min |
| September 17 | 82°F | 57°F | 25% | 16% | 12 h 20 min |
| September 18 | 81°F | 57°F | 25% | 16% | 12 h 20 min |
| September 19 | 81°F | 56°F | 25% | 17% | 12 h 20 min |
| September 20 | 81°F | 56°F | 25% | 17% | 12 h 20 min |
| September 21 | 80°F | 56°F | 25% | 17% | 12 h 10 min |
| September 22 | 80°F | 55°F | 26% | 17% | 12 h 10 min |
| September 23 | 80°F | 55°F | 26% | 17% | 12 h 10 min |
| September 24 | 79°F | 54°F | 26% | 17% | 12 h 10 min |
| September 25 | 79°F | 54°F | 26% | 17% | 12 h 10 min |
| September 26 | 79°F | 54°F | 26% | 17% | 12 h |
| September 27 | 78°F | 53°F | 25% | 16% | 12 h |
| September 28 | 78°F | 53°F | 25% | 16% | 12 h |
| September 29 | 78°F | 52°F | 25% | 16% | 12 h |
| September 30 | 77°F | 52°F | 25% | 16% | 11 h 50 min |
- Normal high
- 82°FSeptember average
- Normal low
- 58°FSeptember average
- Precipitation
- 3.61 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 28
- Days at 80°F or more
- 19
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003935; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Cape Girardeau in September?
On a given September day the chance of 0.01 inch or more is 25% on average, highest around September 23 (26%). In all, 3.61 in falls on 8 days of a normal September, 1 of them with an inch or more.
In a normal September in Cape Girardeau, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003935.
What are the records for September in Cape Girardeau?
The warmest September temperature on this station's record (since 1960) is 101°F, on September 5, 2026; the coldest is 33°F, on September 30, 1999. The wettest September brought 10.23 in (1993).
The September mean against the 1991-2020 normal of 69.7°F: 2021 71.5°F (+1.8), 2022 69.8°F (+0.1), 2023 71.7°F (+2.0), 2024 71.8°F (+2.1), 2025 71.7°F (+2.0), 2026 77.2°F (+7.5). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.5°F | +1.8°F | 1.33 in |
| 2022 | 69.8°F | +0.1°F | 0.63 in |
| 2023 | 71.7°F | +2.0°F | 1.47 in |
| 2024 | 71.8°F | +2.1°F | 3.77 in |
| 2025 | 71.7°F | +2.0°F | 3.99 in |
| 2026 | 77.2°F | +7.5°F | 0.52 in |
Source: records: ACIS, station USW00003935; recent months: ACIS, station USW00003935. Records and recent months use complete months only.
How does September in Cape Girardeau 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; Cape Girardeau's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Cape Girardeau in August88°F by day, 66°F at night
- Cape Girardeau in October71°F by day, 46°F at night
- Cape Girardeau 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