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May Weather in Grand Rapids Michigan, United States

Daily high temperatures increase by 10°F, from 65°F to 75°F, rarely falling below 52°F or exceeding 86°F.

Daily low temperatures increase by 10°F, from 44°F to 54°F, rarely falling below 33°F or exceeding 65°F.

For reference, on July 19, the hottest day of the year, temperatures in Grand Rapids typically range from 63°F to 83°F, while on January 29, the coldest day of the year, they range from 18°F to 30°F.

Average High and Low Temperature in May in Grand Rapids

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 May. 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 May in Grand Rapids

Average Hourly Temperature in May in Grand RapidsMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMAprJunNowNowvery coldcoldcoolcomfortablewarmvery coldcomfortable
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.

Dnipro, Ukraine (5,173 miles away) and Aleksandrovskoye, Russia (5,610 miles) are the far-away foreign places with temperatures most similar to Grand Rapids (view comparison).

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© Esri, et al.

Compare Grand Rapids to another city:

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The month of May in Grand Rapids experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 52% to 48%.

The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 52% of the time.

For reference, on January 7, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 69%, while on August 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.

Cloud Cover Categories in May in Grand Rapids

Cloud Cover Categories in May in Grand RapidsMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJunMay 148%May 148%May 3152%May 3152%May 1148%May 1148%May 2150%May 2150%NowNowclearmostly 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. In Grand Rapids, the chance of a wet day over the course of May is gradually increasing, starting the month at 29% and ending it at 32%.

For reference, the year's highest daily chance of a wet day is 33% on May 24, and its lowest chance is 17% on February 8.

Probability of Precipitation in May in Grand Rapids

Probability of Precipitation in May in Grand RapidsMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%AprJunMay 2433%May 2433%May 129%May 129%May 1130%May 1130%NowNowrainmixed
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 May in Grand Rapids is essentially constant, remaining about 3.1 inches throughout, and rarely exceeding 5.5 inches or falling below 1.1 inches.

The highest average 31-day accumulation is 3.1 inches on May 30.

Average Monthly Rainfall in May in Grand Rapids

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 May in Grand Rapids, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 0 minutes, implying an average daily increase of 2 minutes, 0 seconds, and weekly increase of 14 minutes, 3 seconds.

The shortest day of the month is May 1, with 14 hours, 7 minutes of daylight and the longest day is May 31, with 15 hours, 7 minutes of daylight.

Hours of Daylight and Twilight in May in Grand Rapids

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 latest sunrise of the month in Grand Rapids is 6:36 AM on May 1 and the earliest sunrise is 30 minutes earlier at 6:06 AM on May 31.

The earliest sunset is 8:43 PM on May 1 and the latest sunset is 31 minutes later at 9:14 PM on May 31.

Daylight saving time is observed in Grand Rapids during 2022, but it neither starts nor ends during May, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 6:03 AM and sets 15 hours, 22 minutes later, at 9:25 PM, while on December 21, the shortest day of the year, it rises at 8:10 AM and sets 9 hours, 0 minutes later, at 5:11 PM.

Sunrise & Sunset with Twilight in May in Grand Rapids

The solar day over the course of May. 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 key lunar data for May 2022. 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 May in Grand Rapids

Moon Rise, Set & Phases in May in Grand RapidsMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAprJunApr 12:25 AMApr 12:25 AMApr 162:56 PMApr 162:56 PMApr 304:29 PMApr 304:29 PMMay 1612:15 AMMay 1612:15 AMMay 307:31 AMMay 307:31 AMJun 147:52 AMJun 147:52 AMJun 2810:53 PMJun 2810:53 PM7:51 AM7:51 AM8:46 PM8:46 PM8:33 PM8:33 PM7:32 AM7:32 AM6:38 AM6:38 AM8:45 PM8:45 PM8:43 PM8:43 PM6:31 AM6:31 AM6:02 AM6:02 AM9:49 PM9:49 PM8:56 PM8:56 PM5:49 AM5:49 AM5:20 AM5:20 AM9:37 PM9:37 PM
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.
May 2022IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
1%7:02 AMENE9:51 PMWNW-2:22 PMS248,060 mi
2
4%7:29 AMENE10:56 PMWNW-3:09 PMS249,699 mi
3
8%8:02 AMNE11:58 PMNW-3:57 PMS250,953 mi
4
14%8:41 AMNE--4:47 PMS251,691 mi
5
22%-12:55 AMNW9:27 AMNE5:37 PMS251,788 mi
6
31%-1:46 AMNW10:21 AMNE6:27 PMS251,147 mi
7
40%-2:29 AMNW11:20 AMNE7:16 PMS249,718 mi
8
50%-3:04 AMWNW12:24 PMENE8:03 PMS247,509 mi
9
60%-3:34 AMWNW1:29 PMENE8:49 PMS244,597 mi
10
70%-4:00 AMWNW2:36 PMENE9:33 PMS241,133 mi
11
80%-4:23 AMWNW3:45 PME10:18 PMS237,340 mi
12
88%-4:45 AMW4:55 PME11:03 PMS233,502 mi
13
94%-5:07 AMW6:07 PME11:50 PMS229,942 mi
14
97%-5:31 AMWSW7:23 PMESE--
15
99%-5:58 AMWSW8:43 PMESE12:41 AMS226,990 mi
16
100%-6:31 AMWSW10:05 PMESE1:37 AMS224,928 mi
17
98%-7:13 AMSW11:24 PMSE2:39 AMS223,950 mi
18
93%-8:06 AMSW-3:45 AMS224,116 mi
19
86%12:34 AMSE9:11 AMSW-4:53 AMS225,343 mi
20
76%1:31 AMSE10:25 AMSW-5:58 AMS227,425 mi
21
65%2:15 AMESE11:42 AMWSW-6:58 AMS230,094 mi
22
50%2:50 AMESE12:57 PMWSW-7:53 AMS233,074 mi
23
42%3:18 AMESE2:09 PMWSW-8:43 AMS236,132 mi
24
31%3:41 AME3:18 PMW-9:28 AMS239,095 mi
25
22%4:02 AME4:25 PMW-10:12 AMS241,850 mi
26
14%4:23 AME5:31 PMW-10:54 AMS244,335 mi
27
8%4:43 AMENE6:36 PMWNW-11:36 AMS246,524 mi
28
3%5:06 AMENE7:41 PMWNW-12:20 PMS248,405 mi
29
1%5:32 AMENE8:46 PMWNW-1:05 PMS249,965 mi
30
0%6:02 AMENE9:49 PMNW-1:52 PMS251,180 mi
31
2%6:39 AMNE10:48 PMNW-2:41 PMS252,007 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 in Grand Rapids is increasing during May, rising from 1% to 9% over the course of the month.

For reference, on July 28, the muggiest day of the year, there are muggy conditions 36% of the time, while on November 16, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in May in Grand Rapids

Humidity Comfort Levels in May in Grand RapidsMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AprJunMay 11%May 11%May 319%May 319%May 112%May 112%May 215%May 215%muggymuggyhumidhumidcomfortablecomfortabledrydryoppressiveoppressive
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 in Grand Rapids is decreasing during May, decreasing from 11.1 miles per hour to 9.4 miles per hour over the course of the month.

For reference, on January 12, the windiest day of the year, the daily average wind speed is 12.6 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 7.8 miles per hour.

Average Wind Speed in May in Grand Rapids

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

The hourly average wind direction in Grand Rapids throughout May is predominantly from the west, with a peak proportion of 31% on May 30.

Wind Direction in May in Grand Rapids

Wind Direction in May in Grand RapidsMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%AprJunNowNowwestsoutheastnorth
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).

Grand Rapids 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 in Grand Rapids is rapidly increasing during May, rising by 7°F, from 40°F to 47°F, over the course of the month.

Average Water Temperature in May in Grand Rapids

Average Water Temperature in May in Grand RapidsMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313130°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°FAprJunMay 140°FMay 140°FMay 3147°FMay 3147°FMay 1141°FMay 1141°FMay 2144°FMay 2144°FNowNow
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 in Grand Rapids typically lasts for 5.5 months (167 days), from around April 29 to around October 13, rarely starting before April 11 or after May 18, and rarely ending before September 26 or after October 31.

The month of May in Grand Rapids is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly increasing from 55% to 99% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in May in Grand Rapids

Time Spent in Various Temperature Bands and the Growing Season in May in Grand Rapidsgrowing seasonMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJun55%May 155%May 199%May 3199%May 3179%May 1179%May 1193%May 2193%May 21Apr 1110%Apr 1110%NowNowfreezingvery coldcoldcoolcomfortablewarmhot
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 in Grand Rapids are increasing during May, increasing by 323°F, from 169°F to 492°F, over the course of the month.

Growing Degree Days in May in Grand Rapids

The average growing degree days accumulated over the course of May, 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 in Grand Rapids is gradually increasing during May, rising by 0.8 kWh, from 5.8 kWh to 6.7 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in May in Grand Rapids

Average Daily Incident Shortwave Solar Energy in May in Grand RapidsMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhAprJunMay 15.8 kWhMay 15.8 kWhMay 316.7 kWhMay 316.7 kWhMay 116.2 kWhMay 116.2 kWhMay 216.4 kWhMay 216.4 kWhNowNow
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 Grand Rapids are 42.963 deg latitude, -85.668 deg longitude, and 636 ft elevation.

The topography within 2 miles of Grand Rapids contains only modest variations in elevation, with a maximum elevation change of 197 feet and an average elevation above sea level of 666 feet. Within 10 miles also contains only modest variations in elevation (318 feet). Within 50 miles contains only modest variations in elevation (787 feet).

The area within 2 miles of Grand Rapids is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (61%) and cropland (21%), and within 50 miles by cropland (44%) and trees (31%).

This report illustrates the typical weather in Grand Rapids, 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

There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Grand Rapids.

For each station, the records are corrected for the elevation difference between that station and Grand Rapids according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Grand Rapids is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Grand Rapids and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Grand Rapids and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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 © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

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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