Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
With August's arrival, Saint Charles notes an average high-temperature of a warm 85.5°F (29.7°C), closely following the trend of the preceding month. Saint Charles throughout August, records an average low-temperature of 67.1°F (19.5°C).Heat index
For most parts of August, the heat index is calculated to be a fiery hot 95°F (35°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.Consider that heat index readings are for situations in the shade and light wind. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. 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 74%.Rainfall
In Saint Charles, during August, the rain falls for 13.2 days and regularly aggregates up to 2.95" (75mm) of precipitation. Throughout the year, there are 141.9 rainfall days, and 27.68" (703mm) of precipitation is accumulated.Snowfall
In Saint Charles, snow does not fall in April through October.Daylight
In Saint Charles, the average length of the day in August is 13h and 38min.On the first day of August, sunrise is at 6:03 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:33 pm CDT.
Sunshine
In Saint Charles, the average sunshine in August is 10.3h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index in Saint Charles. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 6 in August, converts into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
How hot is August in Saint Charles?
What is the average humidity in August in Saint Charles?
How many days does it rain in August in Saint Charles?
When it does not snow in Saint Charles?
What is the average length of the day in August in Saint Charles?
When are sunrise and sunset in August in Saint Charles?
How many hours of sunshine does Saint Charles have in August?
What are the months with the highest UV index in Saint Charles?
What is the UV index reading in August in Saint Charles?
Average temperature in August
Saint Charles, MO
- Average high temperature in August: 85.5°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in August: 67.1°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in August
Saint Charles, MO
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Saint Charles, MO
- Average wind speed in August: 5.6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in August
Saint Charles, MO
- Average humidity in August: 74%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (70%).
Average rainfall in August
Saint Charles, MO
- Average rainfall in August: 2.95"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days in August
Saint Charles, MO
- Average rainfall days in August: 13.2 days
The month with the highest number of rainy days is July (16.3 days).
The months with the least rainy days are February and December (7.3 days).
Average snowfall in August
Saint Charles, MO
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.05").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Saint Charles, MO
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (6.8 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
Saint Charles, MO
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in August: 10h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in August
Saint Charles, MO
- Average sunshine days in August: 13.4 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in August
Saint Charles, 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
Saint Charles, MO
- Average cloud cover in August: 27
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in August
Saint Charles, 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).
Saint Charles, Missouri, USA
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