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
Upon the beginning of August, Saint Louis's high-temperatures register at a still warm 77.5°F (25.3°C), closely mirroring the preceding month. Throughout the August nights, Saint Louis encounters a low-temperature of 59.2°F (15.1°C).Humidity
In Saint Louis, the average relative humidity in August is 80%.Rainfall
In Saint Louis, in August, it is raining for 13.8 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, there are 141.3 rainfall days, and 22.48" (571mm) of precipitation is accumulated.Snowfall
In Saint Louis, snow does not fall in May through September.Daylight
In August, the average length of the day is 13h and 55min.On the first day of the month, sunrise is at 6:29 am and sunset at 9:00 pm. On the last day of August, sunrise is at 7:02 am and sunset at 8:14 pm EDT.
Sunshine
In Saint Louis, the average sunshine in August is 9.7h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 5 in August translates into this advice:
Exercise prevention - Protecting skin and eyes from harm is required. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are August temperatures?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
How many hours of daylight does Saint Louis have in August?
When is the sunrise / sunset in August?
How long on average sun shines in August?
What is the month with the highest UV index?
What is the UV index intensity in August?
Average temperature in August
Saint Louis, MI
- Average high temperature in August: 77.5°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in August: 59.2°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in August
Saint Louis, MI
- Average pressure in August: 29.96"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Saint Louis, MI
- Average wind speed in August: 6.8mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in August
Saint Louis, MI
- Average humidity in August: 80%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in August
Saint Louis, MI
- Average rainfall in August: 1.93"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days in August
Saint Louis, MI
- Average rainfall days in August: 13.8 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in August
Saint Louis, MI
- Average snowfall in August: 0"
The month with the highest snowfall is January (5.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Saint Louis, MI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Saint Louis, MI
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in August: 9h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in August
Saint Louis, MI
- Average sunshine days in August: 13.7 days
The month with the most sunshine days is September (15.8 days).
The month with the least sunshine days is January (10.3 days).
Average UV index in August
Saint Louis, MI
- Average UV index in August: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in August
Saint Louis, MI
- Average cloud cover in August: 33
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in August
Saint Louis, MI
- Average visibility in August: 6mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are January, February, September and December (5mi).
Saint Louis, Michigan, USA
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