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August Weather at West Michigan Regional Airport Michigan, United States

Daily high temperatures decrease by 3°F, from 81°F to 77°F, rarely falling below 69°F or exceeding 88°F.

Daily low temperatures decrease by 4°F, from 63°F to 59°F, rarely falling below 49°F or exceeding 72°F.

For reference, on July 18, the hottest day of the year, temperatures at West Michigan Regional Airport typically range from 63°F to 81°F, while on January 29, the coldest day of the year, they range from 20°F to 31°F.

Average High and Low Temperature in August at West Michigan Regional Airport

Average High and Low Temperature in August at West Michigan Regional AirportAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313135°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°FJulSepAug 181°FAug 181°F63°F63°FAug 3177°FAug 3177°F59°F59°FAug 1180°FAug 1180°F62°F62°FAug 2179°FAug 2179°F61°F61°F
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in August at West Michigan Regional Airport

Average Hourly Temperature in August at West Michigan Regional AirportAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMJulSepcoldcoolcomfortablecomfortablewarmcold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Baksan, Russia (5,709 miles away) is the far-away foreign place with temperatures most similar to West Michigan Regional Airport (view comparison).

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The month of August at West Michigan Regional Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 33% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 32% on August 25.

The clearest day of the month is August 25, with clear, mostly clear, or partly cloudy conditions 68% of the time.

For reference, on January 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on August 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%.

Cloud Cover Categories in August at West Michigan Regional Airport

Cloud Cover Categories in August at West Michigan Regional AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepJan 1029%Jan 1029%Aug 167%Aug 167%Aug 3167%Aug 3167%Aug 1168%Aug 1168%Aug 2168%Aug 2168%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At West Michigan Regional Airport, the chance of a wet day over the course of August is essentially constant, remaining around 30% throughout.

For reference, the year's highest daily chance of a wet day is 33% on September 20, and its lowest chance is 17% on February 8.

Probability of Precipitation in August at West Michigan Regional Airport

Probability of Precipitation in August at West Michigan Regional AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%JulSepAug 131%Aug 131%Aug 3130%Aug 3130%Aug 1131%Aug 1131%Aug 2129%Aug 2129%rain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during August at West Michigan Regional Airport is essentially constant, remaining about 3.0 inches throughout, and rarely exceeding 5.4 inches or falling below 1.2 inches.

Average Monthly Rainfall in August at West Michigan Regional Airport

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of August at West Michigan Regional Airport, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 17 minutes, implying an average daily decrease of 2 minutes, 34 seconds, and weekly decrease of 17 minutes, 55 seconds.

The shortest day of the month is August 31, with 13 hours, 11 minutes of daylight and the longest day is August 1, with 14 hours, 28 minutes of daylight.

Hours of Daylight and Twilight in August at West Michigan Regional Airport

Hours of Daylight and Twilight in August at West Michigan Regional AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrJulSepnightnightdaydayAug 114 hr, 28 minAug 114 hr, 28 minAug 3113 hr, 11 minAug 3113 hr, 11 minAug 1613 hr, 51 minAug 1613 hr, 51 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month at West Michigan Regional Airport is 6:36 AM on August 1 and the latest sunrise is 32 minutes later at 7:08 AM on August 31.

The latest sunset is 9:04 PM on August 1 and the earliest sunset is 45 minutes earlier at 8:19 PM on August 31.

Daylight saving time is observed at West Michigan Regional Airport during 2024, but it neither starts nor ends during August, so the entire month is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 6:06 AM and sets 15 hours, 20 minutes later, at 9:26 PM, while on December 21, the shortest day of the year, it rises at 8:11 AM and sets 9 hours, 2 minutes later, at 5:13 PM.

Sunrise & Sunset with Twilight in August at West Michigan Regional Airport

The solar day over the course of August. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in August at West Michigan Regional Airport

Solar Elevation and Azimuth in August at West Michigan Regional AirportAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMJulSep0010102020203030404050506000010102020303030404050506060
northeastsouthwest
Solar elevation and azimuth over the course of August 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for August 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in August at West Michigan Regional Airport

Moon Rise, Set & Phases in August at West Michigan Regional AirportAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJulSepJul 56:58 PMJul 56:58 PMJul 216:18 AMJul 216:18 AMAug 47:14 AMAug 47:14 AMAug 192:26 PMAug 192:26 PMSep 29:56 PMSep 29:56 PMSep 1710:35 PMSep 1710:35 PM5:21 AM5:21 AM9:52 PM9:52 PM9:21 PM9:21 PM6:12 AM6:12 AM6:30 AM6:30 AM9:34 PM9:34 PM8:59 PM8:59 PM7:48 AM7:48 AM6:32 AM6:32 AM8:21 PM8:21 PM7:47 PM7:47 PM8:00 AM8:00 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Aug 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
8%3:12 AMNE7:48 PMNW-11:31 AMS240,764 mi
2
3%4:14 AMNE8:32 PMNW-12:26 PMS242,981 mi
3
1%5:21 AMNE9:06 PMWNW-1:18 PMS245,121 mi
4
0%6:30 AMENE9:34 PMWNW-2:07 PMS247,124 mi
5
2%7:37 AMENE9:56 PMWNW-2:51 PMS248,906 mi
6
5%8:42 AMENE10:15 PMW-3:32 PMS250,362 mi
7
10%9:45 AME10:33 PMW-4:11 PMS251,376 mi
8
17%10:46 AME10:50 PMW-4:50 PMS251,826 mi
9
25%11:47 AME11:07 PMWSW-5:28 PMS251,606 mi
10
34%12:49 PMESE11:27 PMWSW-6:09 PMS250,637 mi
11
43%1:53 PMESE11:49 PMWSW-6:51 PMS248,885 mi
12
50%2:59 PMESE--7:38 PMS246,374 mi
13
64%-12:17 AMWSW4:07 PMSE8:30 PMS243,201 mi
14
74%-12:52 AMSW5:14 PMSE9:26 PMS239,541 mi
15
83%-1:38 AMSW6:17 PMSE10:26 PMS235,650 mi
16
91%-2:36 AMSW7:11 PMSE11:28 PMS231,848 mi
17
94%-3:46 AMSW7:55 PMSE--
18
96%-5:05 AMWSW8:30 PMESE12:30 AMS228,485 mi
19
100%-6:27 AMWSW8:59 PMESE1:28 AMS225,884 mi
20
100%-7:48 AMWSW9:24 PME2:23 AMS224,288 mi
21
97%-9:09 AMW9:47 PME3:15 AMS223,818 mi
22
91%-10:28 AMW10:09 PME4:04 AMS224,457 mi
23
82%-11:47 AMWNW10:33 PMENE4:54 AMS226,067 mi
24
72%-1:06 PMWNW11:01 PMENE5:44 AMS228,424 mi
25
61%-2:24 PMWNW11:34 PMNE6:37 AMS231,264 mi
26
50%-3:39 PMNW-7:32 AMS234,331 mi
27
38%12:16 AMNE4:47 PMNW-8:29 AMS237,408 mi
28
27%1:06 AMNE5:46 PMNW-9:26 AMS240,335 mi
29
18%2:06 AMNE6:32 PMNW-10:22 AMS243,013 mi
30
11%3:11 AMNE7:09 PMWNW-11:15 AMS245,390 mi
31
5%4:19 AMENE7:38 PMWNW-12:03 PMS247,447 mi

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy at West Michigan Regional Airport is rapidly decreasing during August, falling from 38% to 24% over the course of the month.

For reference, on July 31, the muggiest day of the year, there are muggy conditions 38% of the time, while on November 15, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in August at West Michigan Regional Airport

Humidity Comfort Levels in August at West Michigan Regional AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%JulSepAug 138%Aug 138%Aug 3124%Aug 3124%Aug 1134%Aug 1134%Aug 2130%Aug 2130%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at West Michigan Regional Airport is gradually increasing during August, increasing from 8.7 miles per hour to 9.7 miles per hour over the course of the month.

For reference, on January 4, the windiest day of the year, the daily average wind speed is 14.8 miles per hour, while on August 2, the calmest day of the year, the daily average wind speed is 8.7 miles per hour.

The lowest daily average wind speed during August is 8.7 miles per hour on August 2.

Average Wind Speed in August at West Michigan Regional Airport

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction at West Michigan Regional Airport during August is predominantly out of the west from August 1 to August 13 and the south from August 13 to August 31.

Wind Direction in August at West Michigan Regional Airport

Wind Direction in August at West Michigan Regional AirportWSAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%JulSepwestsouthnortheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

West Michigan Regional Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature at West Michigan Regional Airport is essentially constant during August, remaining within 1°F of 71°F throughout.

The highest average surface water temperature during August is 71°F on August 13.

Average Water Temperature in August at West Michigan Regional Airport

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season at West Michigan Regional Airport typically lasts for 5.8 months (178 days), from around April 23 to around October 18, rarely starting before April 6 or after May 12, and rarely ending before September 27 or after November 9.

The month of August at West Michigan Regional Airport is reliably fully within the growing season.

Time Spent in Various Temperature Bands and the Growing Season in August at West Michigan Regional Airport

Time Spent in Various Temperature Bands and the Growing Season in August at West Michigan Regional Airportgrowing seasonAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSep100%Aug 16100%Aug 1690%Sep 2790%Sep 27Jul 22100%Jul 22100%coldcoolcomfortablewarmvery coldhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days at West Michigan Regional Airport are rapidly increasing during August, increasing by 599°F, from 1,670°F to 2,270°F, over the course of the month.

Growing Degree Days in August at West Michigan Regional Airport

Growing Degree Days in August at West Michigan Regional AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031311,400°F1,400°F1,600°F1,600°F1,800°F1,800°F2,000°F2,000°F2,200°F2,200°F2,400°F2,400°FJulSepAug 11,670°FAug 11,670°FAug 312,270°FAug 312,270°FAug 111,881°FAug 111,881°FAug 212,083°FAug 212,083°F
The average growing degree days accumulated over the course of August, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy at West Michigan Regional Airport is gradually decreasing during August, falling by 1.0 kWh, from 6.5 kWh to 5.5 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in August at West Michigan Regional Airport

Average Daily Incident Shortwave Solar Energy in August at West Michigan Regional AirportAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJulSepAug 16.5 kWhAug 16.5 kWhAug 315.5 kWhAug 315.5 kWhAug 116.2 kWhAug 116.2 kWhAug 215.9 kWhAug 215.9 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of West Michigan Regional Airport are 42.743 deg latitude, -86.105 deg longitude, and 669 ft elevation.

The topography within 2 miles of West Michigan Regional Airport contains only modest variations in elevation, with a maximum elevation change of 98 feet and an average elevation above sea level of 680 feet. Within 10 miles also contains only modest variations in elevation (210 feet). Within 50 miles contains only modest variations in elevation (554 feet).

The area within 2 miles of West Michigan Regional Airport is covered by cropland (64%) and artificial surfaces (34%), within 10 miles by cropland (41%) and trees (20%), and within 50 miles by water (39%) and cropland (29%).

This report illustrates the typical weather at West Michigan Regional Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

West Michigan Regional Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back include but are not limited to South Haven Area Regional Airport, Muskegon County Airport, Gerald R. Ford International Airport, Fremont Municipal Airport, Ross Field-Twin Cities Airport, Kalamazoo-Battle Creek International Airport, Hree Rivers Municipal Dr Haines Airport, and W K Kellogg Airport.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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