August weather forecast and climate
Grand Rapids, MI

The vast cityscape of Grand Rapids, a moderately large town in Michigan and two visible bridges across the river
The vast cityscape of Grand Rapids, a moderately large town in Michigan and two visible bridges across the river

Weather in August

The last month of the summer, August, is another warm month in Grand Rapids, Michigan, with average temperature ranging between max 78.6°F (25.9°C) and min 60.4°F (15.8°C).

Temperature

In Grand Rapids, the average high-temperature in August is practically the same as in July - a still warm 78.6°F (25.9°C). In August, the average low-temperature is 60.4°F (15.8°C).

Humidity

In August, the average relative humidity in Grand Rapids is 78%.

Rainfall

In Grand Rapids, in August, it is raining for 9.9 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, in Grand Rapids, there are 103.5 rainfall days, and 9.02" (229mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in August is 13.9h.

Sunshine

In August, the average sunshine in Grand Rapids is 9.8h.

UV index

Months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 6 in August transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
[Resources]

FAQ

What is the average humidity in August in Grand Rapids?

In August, the average relative humidity is 78%.

How much does it rain in Grand Rapids in August?

In Grand Rapids, in August, it is raining for 9.9 days, with typically 0.87" (22mm) of accumulated precipitation.

When it does not snow in Grand Rapids?

May through October are months without snowfall in Grand Rapids, Michigan.

How many hours of daylight does Grand Rapids have in August?

In August, the average length of the day in Grand Rapids, Michigan, is 13.9h.

How long on average sun shines in August in Grand Rapids?

In August, the average sunshine in Grand Rapids, Michigan, is 9.8h.

What are the months with the highest UV index in Grand Rapids?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

How high is the UV index in August in Grand Rapids?

In Grand Rapids, Michigan, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV rays.

Average temperature in August
Grand Rapids, MI

Average temperature in August - Grand Rapids, MI
  • Average high temperature in August: 78.6°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 (27.7°F).

  • Average low temperature in August: 60.4°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 (18.7°F).

[Resources]

Average pressure in August
Grand Rapids, MI

Average pressure in August - Grand Rapids, MI
  • Average pressure in August: 29.97"

The month with the highest atmospheric pressure is March (30.09").
The month with the lowest atmospheric pressure is June (29.92").

[Resources]

Average wind speed in August
Grand Rapids, MI

Average wind speed in August - Grand Rapids, MI
  • Average wind speed in August: 6.6mph

The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

[Resources]

Average humidity in August
Grand Rapids, MI

Average humidity in August - Grand Rapids, MI
  • Average humidity in August: 78%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is April (75%).

[Resources]

Average rainfall in August
Grand Rapids, MI

Average rainfall in August - Grand Rapids, MI
  • Average rainfall in August: 0.87"

The wettest month (with the highest rainfall) is May (1.14").
The driest month (with the least rainfall) is March (0.47").

[Resources]

Average rainfall days in August
Grand Rapids, MI

Average rainfall days in August - Grand Rapids, MI
  • Average rainfall days in August: 9.9 days

The month with the highest number of rainy days is May (13 days).
The month with the least rainy days is February (3.8 days).

[Resources]

Average snowfall in August
Grand Rapids, MI

Average snowfall in August - Grand Rapids, MI
  • Average snowfall in August: 0"

The month with the highest snowfall is January (1.57").
Months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days in August
Grand Rapids, MI

Average snowfall days in August - Grand Rapids, MI
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (11.5 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

[Resources]

Average daylight in August /
Average sunshine in August
Grand Rapids, MI

Average daylight in August / Average sunshine in August - Grand Rapids, MI
  • Average daylight in August: 13.9h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in August: 9.8h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 2.3h).

[Resources]

Average sunshine days in August
Grand Rapids, MI

Average sunshine days in August - Grand Rapids, MI
  • Average sunshine days in August: 17.3 days

The month with the most sunshine days is September (21 days).
The month with the least sunshine days is April (13.4 days).

[Resources]

Average UV index in August
Grand Rapids, MI

Average UV index in August - Grand Rapids, MI
  • Average UV index in August: 6

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 1).

[Resources]

Average cloud cover in August
Grand Rapids, MI

Average cloud cover in August - Grand Rapids, MI
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 30).

[Resources]

Average visibility in August
Grand Rapids, MI

Average visibility in August - Grand Rapids, MI
  • Average visibility in August: 6mi

Months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January and February (5mi).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location