August weather forecast
Cape Girardeau, MO

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A unique aerial panorama of the Cape Girardeau in Missouri, with a clear view of the large Mississippi River outback
A unique aerial panorama of the Cape Girardeau in Missouri, with a clear view of the large Mississippi River outback

Weather in August

As August arrives in Cape Girardeau, it brings a subtle hint of impending autumn. Though the days still see high temperatures at 86.2°F (30.1°C) and nights record 67.1°F (19.5°C), a slight dip compared to July, it is still firmly within the bounds of summer. The city continues to revel in sunlight, providing ample opportunities for sight-seeing and outdoorsy adventures. Evenings turn cozier, perfect for bonfires and BBQ get-togethers. August demonstrates the enduring charm of Cape Girardeau's weather and culture.

Temperature

Cape Girardeau, Missouri, experiences an average high-temperature of a still hot 86.2°F (30.1°C) in August, subtly different from July's 88.3°F (31.3°C). Throughout August nights, Cape Girardeau experiences a consistent temperature average of 67.1°F (19.5°C).

Heat index

The heat index value for August is appraised at a fiery hot 98.6°F (37°C). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

The average relative humidity in August is 76%.

Rainfall

In Cape Girardeau, in August, it is raining for 14.4 days, with typically 2.72" (69mm) of accumulated precipitation. Throughout the year, there are 158.6 rainfall days, and 35.59" (904mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In Cape Girardeau, the average length of the day in August is 13h and 33min.
On the first day of the month, sunrise is at 6:03 am and sunset at 8:05 pm. On the last day of August, sunrise is at 6:28 am and sunset at 7:27 pm CDT.

Sunshine

In Cape Girardeau, the average sunshine in August is 10.4h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 6 in August translates into these instructions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in Cape Girardeau in August?

During August, Cape Girardeau experiences an average high-temperature of 86.2°F (30.1°C) and a low-temperature of 67.1°F (19.5°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is appraised at 98.6°F (37°C).

What is the average humidity in August in Cape Girardeau?

In Cape Girardeau, the average relative humidity in August is 76%.

How many days does it rain in August in Cape Girardeau?

In August, in Cape Girardeau, Missouri, the rain falls for 14.4 days. Throughout August, 2.72" (69mm) of precipitation is accumulated.

When it does not snow in Cape Girardeau?

In Cape Girardeau, snow does not fall in May through September.

What is the average length of the day in August in Cape Girardeau?

In August, the average day length in Cape Girardeau, Missouri, is 13h and 33min.

What time are sunrise and sunset in August in Cape Girardeau?

In August, on the first day of the month, sunrise is at 6:03 am and sunset at 8:05 pm. On the last day of the month, in Cape Girardeau, Missouri, sunrise is at 6:28 am and sunset at 7:27 pm CDT.

How many hours of sunshine does Cape Girardeau have in August?

The average sunshine duration in August is 10.4h.

When is the highest UV index in Cape Girardeau?

The months with the highest UV index in Cape Girardeau, Missouri, are May through August, with an average maximum UV index of 6.

What is the UV index intensity in August in Cape Girardeau?

In August, the average daily maximum UV index in Cape Girardeau, Missouri, is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Cape Girardeau, MO

Average temperature in August - Cape Girardeau, MO
  • Average high temperature in August: 86.2°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (41°F).

  • Average low temperature in August: 67.1°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).

Average pressure in August
Cape Girardeau, MO

Average pressure in August - Cape Girardeau, MO
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in August
Cape Girardeau, MO

Average wind speed in August - Cape Girardeau, MO
  • Average wind speed in August: 5.7mph

The windiest months (with the highest average wind speed) are January and February (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

Average humidity in August
Cape Girardeau, MO

Average humidity in August - Cape Girardeau, MO
  • Average humidity in August: 76%

The months with the highest relative humidity are March and May (78%).
The month with the lowest relative humidity is October (69%).

Average rainfall in August
Cape Girardeau, MO

Average rainfall in August - Cape Girardeau, MO
  • Average rainfall in August: 2.72"

The wettest month (with the highest rainfall) is April (4.33").
The driest month (with the least rainfall) is September (1.5").

Average rainfall days in August
Cape Girardeau, MO

Average rainfall days in August - Cape Girardeau, MO
  • Average rainfall days in August: 14.4 days

The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (9.8 days).

Average snowfall in August
Cape Girardeau, MO

Average snowfall in August - Cape Girardeau, MO
  • Average snowfall in August: 0"

The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Cape Girardeau, MO

Average snowfall days in August - Cape Girardeau, MO
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Cape Girardeau, MO

Average daylight in August / Average sunshine in August - Cape Girardeau, MO
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in August
Cape Girardeau, MO

Average sunshine days in August - Cape Girardeau, MO
  • Average sunshine days in August: 14.3 days

The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is July (11.9 days).

Average UV index in August
Cape Girardeau, MO

Average UV index in August - Cape Girardeau, MO
  • Average UV index in August: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in August
Cape Girardeau, MO

Average cloud cover in August - Cape Girardeau, MO
  • Average cloud cover in August: 27

The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are June, August and September (Cloud cover 27).

Average visibility in August
Cape Girardeau, MO

Average visibility in August - Cape Girardeau, MO
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Cape Girardeau, Missouri, USA

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