August weather forecastPortage, MI
August
Weather in August
August experiences a slight reduction in temperature, cooling down to an average high of 78.3°F (25.7°C). Still, it is still rooted in the summer territory with warm and longer days. August carries forward the dry spell of July, which accompanies some excellent weather periods. The windy conditions tone down compared to July, making it one of the least windy months of the year. Although the temperature is similar to July, the slight decline and constant sunshine make August another great month for a plethora of outdoor activities.Temperature
The onset of August notes an average high-temperature of a still warm 78.3°F (25.7°C), subtly shifted from July's 79.7°F (26.5°C). In the month of August, the temperature generally rests at an average low of 60.1°F (15.6°C).Humidity
In Portage, the average relative humidity in August is 81%.Rainfall
In August, the rain falls for 16.1 days. Throughout August, 2.56" (65mm) of precipitation is accumulated. Throughout the year, there are 158.4 rainfall days, and 29.88" (759mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in August is 13h and 50min.On the first day of August, sunrise is at 6:36 am and sunset at 9:01 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 8:17 pm EDT.
Sunshine
In Portage, the average sunshine in August is 9.6h.UV index
The months with the highest UV index are June and August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 6 during August translates into the following guidance:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Portage, MI
- Average high temperature in August: 78.3°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in August: 60.1°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in August
Portage, MI
- Average pressure in August: 29.98"Hg
The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Portage, MI
- Average wind speed in August: 6.4mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in August
Portage, MI
- Average humidity in August: 81%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in August
Portage, MI
- Average rainfall in August: 2.56"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is November (1.73").
Average rainfall days in August
Portage, MI
- Average rainfall days in August: 16.1 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in August
Portage, MI
- Average snowfall in August: 0"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Portage, MI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (16.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Portage, 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 12min).
- Average sunshine in August: 9h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in August
Portage, MI
- Average sunshine days in August: 11.5 days
The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is February (9.8 days).
Average UV index in August
Portage, MI
- Average UV index in August: 6
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Portage, MI
- Average cloud cover in August: 33
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in August
Portage, MI
- Average visibility in August: 5mi
The months with the highest visibility are March, April, May, June, July, October and November (6mi).
The months with the lowest visibility are January, February, August, September and December (5mi).
