Cape Girardeau weather in August

In August, Cape Girardeau sees average daytime highs of 87°F and overnight lows near 69°F, with 2.8 in of rain across 8 wet days and about 13.4 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 87°F through the month. The sky is clear or mostly clear about 42% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Cape Girardeau's 3rd-clearest and 12th-windiest month. For the whole year in context, see Cape Girardeau's year-round climate.

Daytime high
87°
2nd warmest
Overnight low
69°
11th coldest
Rainfall
2.8 in
8 wet days
Daylight
13 h 24 min
5:19 AM – 6:46 PM
Cloud cover
50%
3rd clearest
Wind
5 mph
12th windiest
Solar energy
5.83 kWh/m²
Travel score
5.0
out of 10

Cape Girardeau is city in Cape Girardeau and Scott Counties in the U.S. state of Missouri.

Density
535/km²
people per km²
Founded
1793

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 87°F through the month.

A typical August day in Cape Girardeau reaches about 87°F in the afternoon and slips back to 69°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 94°F. Set against its neighbours, August runs on par with July and about 6°F warmer than September.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18871
28871
38871
48870
58870
68870
78770
88770
98770
108770
118770
128769
138769
148769
158769
168769
178769
188769
198769
208769
218769
228769
238769
248769
258769
268768
278768
288768
298668
308667
318667

How August really feels in Cape Girardeau

Once humidity and wind are folded in, August averages 20 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
20
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Cape Girardeau weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan43° / 28°3.89.229.70.6
Feb48° / 31°3.48.21.710.61.8
Mar58° / 40°4.811.80.711.74.1
Apr68° / 49°5.311.1012.96.1
May77° / 60°4.712.30146.4
Jun85° / 68°3.510.1014.55.3
Jul88° / 72°3.310.1014.34.4
Aug87° / 69°2.88013.45.0
Sep81° / 61°3.27.6012.36.8
Oct69° / 50°3.97.90.1117.0
Nov56° / 39°4.18.70.5104.1
Dec46° / 31°3.78.91.39.51.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36139
46139
56139
66139
76139
86139
96139
106139
116040
126040
136040
146040
156040
166040
176139
186139
196139
206139
216139
226139
236238
246139
256139
266238
276337
286337
296337
306436
316436

Chance of precipitation in August

Any precipitation

Cape Girardeau gets around 2.8 in of rain over 8 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 26% and peaks near 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
131
230
330
430
530
630
729
829
929
1028
1128
1228
1327
1426
1526
1625
1724
1824
1923
2023
2123
2223
2323
2423
2523
2623
2723
2824
2924
3024
3124

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the oppressive band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 66% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1291927395
2291928384
3291929374
4281929374
5281930364
6381930364
7381930354
8481930354
9481930354
10591929344
11591829344
12591829344
13591829344
145101829334
155101829334
165101929334
175101929333
185111929333
195111929333
205111929332
215111929332
225111929342
235111930341
245111930331
255112030331
265112031331
276112031321
286112032311
297122032290
307122032280
318122032270

Wind in August

Winds average 5 mph in August, the calmest month.

Across August, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 54 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 5:06 AM to 5:32 AM, and sunset from 7:02 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:067:02
213.95:077:01
313.95:087:00
413.85:096:59
513.85:096:58
613.85:106:57
713.85:116:56
813.75:126:55
913.75:136:54
1013.75:146:53
1113.65:156:52
1213.65:156:50
1313.65:166:49
1413.55:176:48
1513.55:186:47
1613.45:196:46
1713.45:206:44
1813.45:216:43
1913.35:216:42
2013.35:226:40
2113.35:236:39
2213.25:246:38
2313.25:256:36
2413.15:266:35
2513.15:276:33
2613.15:276:32
2713.05:286:30
2813.05:296:29
2913.05:306:27
3012.95:316:26
3112.95:326:24

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.83 kWh/m².

For context, solar energy here swings from a low near 1.99 kWh/m² to a high of 6.5 kWh/m² in June across the year — August's 5.83 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.1Intense
46.1Intense
56.1Intense
66.0Intense
76.0Intense
86.0Intense
96.0Bright
106.0Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.6Bright
255.6Bright
265.5Bright
275.5Bright
285.5Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in August

Hazard calendar for Cape Girardeau

In seasonPeak

In August, Cape Girardeau sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Cape Girardeau sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Cape Girardeau?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.0
Sightseeing
6th-best month of the year
7.1
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Cape Girardeau for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Cape Girardeau in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Cape Girardeau sees daytime highs around 87°F and nights near 69°F. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Cape Girardeau in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cape Girardeau peaks around June 21 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 21UV 10Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov4Moderate
Dec2Moderate

Air quality in Cape Girardeau in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Cape Girardeau is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (November, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1318 µg/m³Nov 128 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar12Moderate
Apr11Good
May14Moderate
Jun17Moderate
Jul19Moderate
Aug14Moderate
Sep12Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Cape Girardeau?

Cape Girardeau sits at 37.3°N, 89.5°W, 354 ft above sea level, in United States. The nearest listed city is Sikeston, 30 mi away.

Topography around Cape Girardeau

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Cape Girardeau.

Within 2 miles, the terrain around Cape Girardeau has only modest variations in elevation — a maximum elevation change of 285 ft around an average of 371 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 869 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,375 ft.

The land around Cape Girardeau is covered by trees (36%) and cropland (20%) within 2 miles, trees (49%) and cropland (30%) within 10 miles, and trees (47%) and cropland (39%) within 50 miles.

2 miles
285 ft
10 miles
869 ft
50 miles
1,375 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Sikeston 30 mi · Carbondale 34 mi · Marion 43 mi · Paducah 53 mi · Farmington 60 mi · Poplar Bluff 62 mi · Mount Vernon 78 mi · Murray 82 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Cape Girardeau (37.3059°, -89.5182°, elevation 354 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).