August weather forecast and climate
Maryland Heights, MO

The last month of the summer, August, is also a moderately hot month in Maryland Heights, Missouri, with average temperature fluctuating between 85.5°F (29.7°C) and 67.1°F (19.5°C).

Temperature

In August, the average high-temperature is almost the same as in July - a warm 85.5°F (29.7°C). In August, the average low-temperature is 67.1°F (19.5°C).

Heat index

In August, the average heat index is appraised at a sweltering 95.4°F (35.2°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With the 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', 'felt air temperature', 'feels like', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, clothing, wind), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

In Maryland Heights, the average relative humidity in August is 74%.

Rainfall

In Maryland Heights, during August, the rain falls for 13.2 days and regularly aggregates up to 2.95" (75mm) of precipitation. In Maryland Heights, during the entire year, the rain falls for 141.9 days and collects up to 27.68" (703mm) of precipitation.

Snowfall

April through October are months without snowfall in Maryland Heights.

Daylight

In Maryland Heights, the average length of the day is 13.6h.

Sunshine

The average sunshine in August is 10.3h.

UV index

Months with the highest UV index in Maryland Heights are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in August in Maryland Heights?

The average high-temperature, in August, in Maryland Heights, Missouri, is 85.5°F (29.7°C), while the average low-temperature is 67.1°F (19.5°C). The average heat index (a.k.a. 'feels like', 'real feel'), that combines air temperature and relative humidity, in August is appraised at 95.4°F (35.2°C).

What is the average humidity in August in Maryland Heights?

In August, the average relative humidity in Maryland Heights is 74%.

How much does it rain in Maryland Heights in August?

In Maryland Heights, Missouri, during August, the rain falls for 13.2 days and regularly aggregates up to 2.95" (75mm) of precipitation.

When it does not snow in Maryland Heights?

In Maryland Heights snow does not fall in April through October.

What is the average length of the day in August in Maryland Heights?

In Maryland Heights, the average length of the day in August is 13.6h.

How many hours of sunshine does Maryland Heights have in August?

The average sunshine in August in Maryland Heights is 10.3h.

What is the month with the highest UV index in Maryland Heights?

Months with the highest UV index are May through August, with an average maximum UV index of 6.

What is the UV index reading in August in Maryland Heights?

In August, the average daily maximum UV index in Maryland Heights, Missouri, is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to the Sun's UV rays.
Average temperature in August - Maryland Heights, MO
  • Average high temperature in August: 29.7°C

The warmest month (with the highest average high temperature) is July (30.4°C).
The month with the lowest average high temperature is January (2.9°C).

  • Average low temperature in August: 19.5°C

The month with the highest average low temperature is July (20.5°C).
The coldest month (with the lowest average low temperature) is January (-4.3°C).

Average pressure in August - Maryland Heights, MO
  • Average pressure in August: 1015mbar

The month with the highest atmospheric pressure is January (1021.2mbar).
The month with the lowest atmospheric pressure is June (1013.2mbar).

Average wind speed in August - Maryland Heights, MO
  • Average wind speed in August: 9km/h

The windiest month (with the highest average wind speed) is January (14.9km/h).
The calmest months (with the lowest average wind speed) are July and August (9km/h).

Average humidity in August - Maryland Heights, 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 - Maryland Heights, MO
  • Average rainfall in August: 75mm

The wettest month (with the highest rainfall) is May (84mm).
The driest month (with the least rainfall) is February (36mm).

Average rainfall days in August - Maryland Heights, MO
  • Average rainfall days in August: 13.2 days

The month with the highest number of rainy days is July (16.3 days).
Months with the least rainy days are February and December (7.3 days).

Average snowfall in August - Maryland Heights, MO
  • Average snowfall in August: 0mm

The month with the highest snowfall is February (52mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in August - Maryland Heights, MO
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (6.8 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in August / Average sunshine in August - Maryland Heights, MO
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in August: 10.3h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 4.6h).

Average sunshine days in August - Maryland Heights, 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 - Maryland Heights, MO
  • Average UV index in August: 6

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

Average cloud cover in August - Maryland Heights, 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 - Maryland Heights, MO
  • Average visibility in August: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).