August weather forecastDetroit, MI
August
Weather in August
August experiences a slight drop in temperature from July, although it remains within the summer range at 78.4°F (25.8°C). The minor reduction in heat provides a small reprieve from the sweltering July weather. Cloud cover starts to increase slightly, offering more shade and relief from the still-intense sun. August is a month to enjoy the remaining days of summer, from backyard barbecues with neighbors to strolls along the Detroit Riverwalk. While storms are more likely as the month progresses, they bring a refreshing change from the typical summer heat.Temperature
At the start of August, Detroit's average high-temperature reaches a still warm 78.4°F (25.8°C), subtly different from the preceding month. Detroit experiences a mean temperature of 64.9°F (18.3°C) during August nights.Humidity
The months with the lowest humidity are July and August, with an average relative humidity of 73%.Rainfall
In August, the rain falls for 15.2 days. Throughout August, 2.44" (62mm) of precipitation is accumulated. In Detroit, during the entire year, the rain falls for 152.1 days and collects up to 23.43" (595mm) of precipitation.Snowfall
June through September are months without snowfall.Ocean temperature
August is the month with the warmest seawater, with an average ocean temperature of 75.4°F (24.1°C).Note: For someone not comfortable with cold, swimming in 75.4°F (24.1°C) waters might be a stretch. However, with favorable conditions like abundant sunshine, mild wind, and warm air temperatures, the experience can be improved. And while wetsuits are not a must, they can be considered.
Daylight
The average length of the day in August is 13h and 50min.On the first day of August, sunrise is at 6:25 am and sunset at 8:51 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 8:07 pm EDT.
Sunshine
In August, the average sunshine in Detroit is 10.5h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: In August, the maximum UV index of 6 suggests this advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be mindful! Sand and water reflections can up the Sun's UV exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Detroit, MI
- Average high temperature in August: 78.4°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in August: 64.9°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in August
Detroit, MI
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Detroit, MI
- Average wind speed in August: 7.1mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in August
Detroit, MI
- Average humidity in August: 73%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are July and August (73%).
Average rainfall in August
Detroit, MI
- Average rainfall in August: 2.44"
The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in August
Detroit, MI
- Average rainfall days in August: 15.2 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in August
Detroit, MI
- Average snowfall in August: 0"
The month with the highest snowfall is January (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Detroit, MI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in August
Detroit, MI
- Average sea temperature in August: 75.4°F
The best month for swimming (with the highest average sea temperature) is August (75.4°F).
The coldest month (with the lowest average sea temperature) is February (32.7°F).
Average daylight in August /
Average sunshine in August
Detroit, MI
- Average daylight in August: 13h and 48min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in August: 10h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in August
Detroit, MI
- Average sunshine days in August: 13 days
The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is February (10.7 days).
Average UV index in August
Detroit, MI
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Detroit, MI
- Average cloud cover in August: 28
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in August
Detroit, MI
- Average visibility in August: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
