Cape Girardeau weather in August: Cape Girardeau, Missouri: normal highs, lows, rain and records for August
Cape Girardeau in August has a normal high of 88°F and a normal low of 66°F, a daily mean of 77°F, falling from 89°F on the 1st to 86°F by the 31st. Measurable precipitation falls on 8 days in a normal August, 3.23 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 19°C, 82 mm of precipitation in August.
- 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 August?
The normal high is 88°F and the normal low 66°F, for a daily mean of 77.4°F. August is 1.9°F cooler than July and 7.7°F warmer than September. August is the 2nd warmest month of the year in Cape Girardeau and the 12th wettest. Across the month the normal high falls 3°F, from 89°F on August 1 to 86°F on August 31. From one year to the next August's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 75°F and 80°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 29%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 89°F | 69°F | 29% | 18% |
| August 8 | 89°F | 68°F | 28% | 17% |
| August 15 | 89°F | 67°F | 27% | 16% |
| August 22 | 88°F | 66°F | 25% | 15% |
| August 31 | 86°F | 63°F | 25% | 16% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 89°F | 69°F | 29% | 18% | 14 h 10 min |
| August 2 | 89°F | 69°F | 29% | 17% | 14 h |
| August 3 | 89°F | 68°F | 29% | 17% | 14 h |
| August 4 | 89°F | 68°F | 29% | 17% | 14 h |
| August 5 | 89°F | 68°F | 29% | 17% | 14 h |
| August 6 | 89°F | 68°F | 29% | 17% | 14 h |
| August 7 | 89°F | 68°F | 29% | 17% | 13 h 50 min |
| August 8 | 89°F | 68°F | 28% | 17% | 13 h 50 min |
| August 9 | 89°F | 68°F | 28% | 17% | 13 h 50 min |
| August 10 | 89°F | 68°F | 28% | 16% | 13 h 50 min |
| August 11 | 89°F | 67°F | 28% | 16% | 13 h 50 min |
| August 12 | 89°F | 67°F | 28% | 16% | 13 h 40 min |
| August 13 | 89°F | 67°F | 27% | 16% | 13 h 40 min |
| August 14 | 89°F | 67°F | 27% | 16% | 13 h 40 min |
| August 15 | 89°F | 67°F | 27% | 16% | 13 h 40 min |
| August 16 | 89°F | 67°F | 27% | 16% | 13 h 40 min |
| August 17 | 89°F | 67°F | 27% | 16% | 13 h 30 min |
| August 18 | 88°F | 66°F | 26% | 16% | 13 h 30 min |
| August 19 | 88°F | 66°F | 26% | 15% | 13 h 30 min |
| August 20 | 88°F | 66°F | 26% | 15% | 13 h 30 min |
| August 21 | 88°F | 66°F | 26% | 15% | 13 h 30 min |
| August 22 | 88°F | 66°F | 25% | 15% | 13 h 20 min |
| August 23 | 88°F | 65°F | 25% | 15% | 13 h 20 min |
| August 24 | 88°F | 65°F | 25% | 15% | 13 h 20 min |
| August 25 | 87°F | 65°F | 25% | 15% | 13 h 20 min |
| August 26 | 87°F | 65°F | 25% | 15% | 13 h 10 min |
| August 27 | 87°F | 64°F | 25% | 15% | 13 h 10 min |
| August 28 | 87°F | 64°F | 25% | 15% | 13 h 10 min |
| August 29 | 87°F | 64°F | 25% | 16% | 13 h 10 min |
| August 30 | 86°F | 64°F | 25% | 16% | 13 h 10 min |
| August 31 | 86°F | 63°F | 25% | 16% | 13 h |
- Normal high
- 88°FAugust average
- Normal low
- 66°FAugust average
- Precipitation
- 3.23 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 13
- Daylight
- 14 h 10 min to 13 hAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 29
- Sunshine
- 82%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 August?
On a given August day the chance of 0.01 inch or more is 27% on average, highest around August 1 (29%). In all, 3.23 in falls on 8 days of a normal August, 1 of them with an inch or more.
In a normal August in Cape Girardeau, 13 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003935.
What are the records for August in Cape Girardeau?
The warmest August temperature on this station's record (since 1960) is 105°F, on August 4, 1964; the coldest is 45°F, on August 29, 1986. The wettest August brought 11.15 in (2023).
The August mean against the 1991-2020 normal of 77.4°F: 2021 78.1°F (+0.7), 2022 76.8°F (−0.6), 2023 76.7°F (−0.7), 2024 77.7°F (+0.3), 2025 75.7°F (−1.7), 2026 77.8°F (+0.4). 3 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 78.1°F | +0.7°F | 1.82 in |
| 2022 | 76.8°F | −0.6°F | 3.15 in |
| 2023 | 76.7°F | −0.7°F | 11.15 in |
| 2024 | 77.7°F | +0.3°F | 0.51 in |
| 2025 | 75.7°F | −1.7°F | 0.57 in |
| 2026 | 77.8°F | +0.4°F | 2.90 in |
Source: records: ACIS, station USW00003935; recent months: ACIS, station USW00003935. Records and recent months use complete months only.
How does August in Cape Girardeau compare across Missouri?
Across the 134 places PlainClimate covers in Missouri, August normal highs run from 83°F in Canton to 91°F in Malden; Cape Girardeau's is 88°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Cape Girardeau in July89°F by day, 69°F at night
- Cape Girardeau in September82°F by day, 58°F at night
- Cape Girardeau through the yearEvery month, frost dates, records and recent years
- Missouri in AugustThe statewide normal and the warmest and coolest places
- Malden: Missouri's warmest Augustnormal high 91°F