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May Weather in Griffith Indiana, United States

Daily high temperatures increase by 9°F, from 66°F to 75°F, rarely falling below 52°F or exceeding 87°F.

Daily low temperatures increase by 9°F, from 47°F to 56°F, rarely falling below 37°F or exceeding 67°F.

For reference, on July 18, the hottest day of the year, temperatures in Griffith typically range from 66°F to 84°F, while on January 29, the coldest day of the year, they range from 19°F to 33°F.

Average High and Low Temperature in May in Griffith

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 Griffith

Average Hourly Temperature in May in GriffithMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMAprJunvery coldcoldcoolcomfortablewarmvery cold
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.

Damāvand, Iran (6,523 miles away) is the far-away foreign place with temperatures most similar to Griffith (view comparison).

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The month of May in Griffith experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 50% throughout the month.

The clearest day of the month is May 29, with clear, mostly clear, or partly cloudy conditions 51% of the time.

For reference, on December 28, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 60%, 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 May in Griffith

Cloud Cover Categories in May in GriffithMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%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 3151%May 3151%May 1149%May 1149%May 2150%May 2150%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. In Griffith, the chance of a wet day over the course of May is increasing, starting the month at 32% and ending it at 37%.

For reference, the year's highest daily chance of a wet day is 38% on June 11, and its lowest chance is 15% on February 3.

Probability of Precipitation in May in Griffith

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 Griffith is increasing, starting the month at 3.2 inches, when it rarely exceeds 5.3 inches or falls below 1.2 inches, and ending the month at 3.8 inches, when it rarely exceeds 6.3 inches or falls below 1.5 inches.

Average Monthly Rainfall in May in Griffith

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 Griffith, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 56 minutes, implying an average daily increase of 1 minute, 53 seconds, and weekly increase of 13 minutes, 9 seconds.

The shortest day of the month is May 1, with 14 hours, 2 minutes of daylight and the longest day is May 31, with 14 hours, 59 minutes of daylight.

Hours of Daylight and Twilight in May in Griffith

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 Griffith is 5:45 AM on May 1 and the earliest sunrise is 28 minutes earlier at 5:18 AM on May 31.

The earliest sunset is 7:48 PM on May 1 and the latest sunset is 29 minutes later at 8:17 PM on May 31.

Daylight saving time is observed in Griffith during 2024, but it neither starts nor ends during May, so the entire month is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:15 AM and sets 15 hours, 11 minutes later, at 8:27 PM, while on December 21, the shortest day of the year, it rises at 7:13 AM and sets 9 hours, 10 minutes later, at 4:23 PM.

Sunrise & Sunset with Twilight in May in Griffith

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 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 May in Griffith

Solar Elevation and Azimuth in May in GriffithMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMAprJun001010202020303040405050506060700001010202030303040405050606070
northeastsouthwest
Solar elevation and azimuth over the course of May 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 May 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 May in Griffith

Moon Rise, Set & Phases in May in GriffithMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAprJunApr 81:22 PMApr 81:22 PMApr 236:50 PMApr 236:50 PMMay 710:23 PMMay 710:23 PMMay 238:54 AMMay 238:54 AMJun 67:38 AMJun 67:38 AMJun 218:09 PMJun 218:09 PM6:15 AM6:15 AM7:38 PM7:38 PM7:40 PM7:40 PM6:03 AM6:03 AM5:06 AM5:06 AM7:49 PM7:49 PM7:42 PM7:42 PM5:02 AM5:02 AM4:52 AM4:52 AM9:11 PM9:11 PM8:47 PM8:47 PM5:20 AM5:20 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.
May 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
50%2:29 AMESE12:05 PMWSW-7:17 AMS232,079 mi
2
38%3:01 AMESE1:22 PMWSW-8:11 AMS229,759 mi
3
27%3:28 AMESE2:38 PMWSW-9:02 AMS227,785 mi
4
17%3:52 AME3:55 PMW-9:51 AMS226,363 mi
5
9%4:15 AME5:11 PMW-10:40 AMS225,691 mi
6
3%4:39 AMENE6:30 PMWNW-11:30 AMS225,923 mi
7
0%5:06 AMENE7:49 PMWNW-12:22 PMS227,128 mi
8
1%5:37 AMENE9:08 PMWNW-1:18 PMS229,264 mi
9
4%6:16 AMNE10:23 PMNW-2:16 PMS232,172 mi
10
9%7:03 AMNE11:29 PMNW-3:15 PMS235,598 mi
11
17%8:00 AMNE--4:14 PMS239,232 mi
12
26%-12:24 AMNW9:04 AMNE5:09 PMS242,758 mi
13
35%-1:07 AMNW10:10 AMENE6:00 PMS245,898 mi
14
45%-1:41 AMWNW11:17 AMENE6:47 PMS248,439 mi
15
50%-2:07 AMWNW12:21 PMENE7:29 PMS250,237 mi
16
65%-2:30 AMWNW1:24 PMENE8:10 PMS251,224 mi
17
74%-2:49 AMW2:25 PME8:48 PMS251,401 mi
18
82%-3:08 AMW3:25 PME9:27 PMS250,828 mi
19
89%-3:26 AMW4:26 PME10:06 PMS249,610 mi
20
94%-3:45 AMWSW5:29 PMESE10:48 PMS247,885 mi
21
98%-4:06 AMWSW6:34 PMESE11:33 PMS245,809 mi
22
99%-4:31 AMWSW7:42 PMESE--
23
100%-5:02 AMWSW8:51 PMSE12:22 AMS243,536 mi
24
99%-5:41 AMSW9:57 PMSE1:16 AMS241,208 mi
25
97%-6:31 AMSW10:58 PMSE2:14 AMS238,940 mi
26
92%-7:31 AMSW11:49 PMSE3:14 AMS236,815 mi
27
84%-8:41 AMSW-4:15 AMS234,879 mi
28
75%12:30 AMESE9:56 AMWSW-5:13 AMS233,154 mi
29
64%1:03 AMESE11:12 AMWSW-6:07 AMS231,652 mi
30
50%1:31 AMESE12:27 PMWSW-6:58 AMS230,399 mi
31
41%1:56 AME1:41 PMW-7:47 AMS229,443 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 Griffith is rapidly increasing during May, rising from 3% to 18% over the course of the month.

For reference, on July 26, the muggiest day of the year, there are muggy conditions 50% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in May in Griffith

Humidity Comfort Levels in May in GriffithMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AprJunMay 13%May 13%May 3118%May 3118%May 115%May 115%May 2111%May 2111%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 in Griffith is decreasing during May, decreasing from 11.5 miles per hour to 9.9 miles per hour over the course of the month.

For reference, on January 15, the windiest day of the year, the daily average wind speed is 13.2 miles per hour, while on August 2, the calmest day of the year, the daily average wind speed is 7.9 miles per hour.

Average Wind Speed in May in Griffith

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 Griffith throughout May is predominantly from the south, with a peak proportion of 32% on May 17.

Wind Direction in May in Griffith

Wind Direction in May in GriffithNSMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%AprJunwestsoutheastnorth
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).

Griffith 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 Griffith is rapidly increasing during May, rising by 9°F, from 42°F to 50°F, over the course of the month.

Average Water Temperature in May in Griffith

Average Water Temperature in May in GriffithMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313130°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FAprJunMay 142°FMay 142°FMay 3150°FMay 3150°FMay 1144°FMay 1144°FMay 2147°FMay 2147°F
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 Griffith typically lasts for 6.3 months (191 days), from around April 14 to around October 23, rarely starting before March 29 or after May 1, and rarely ending before October 2 or after November 11.

The month of May in Griffith is very likely fully within the growing season, with the chance that a given day is in the growing season gradually increasing from 90% to 100% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in May in Griffith

Time Spent in Various Temperature Bands and the Growing Season in May in Griffithgrowing seasonMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJun90%May 190%May 1100%May 31100%May 3199%May 1199%May 11100%May 21100%May 2150%Apr 1450%Apr 14very coldcoldcoolcomfortablewarmhotfreezing
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 Griffith are increasing during May, increasing by 339°F, from 216°F to 555°F, over the course of the month.

Growing Degree Days in May in Griffith

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 Griffith is gradually increasing during May, rising by 0.7 kWh, from 5.8 kWh to 6.5 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in May in Griffith

Average Daily Incident Shortwave Solar Energy in May in GriffithMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 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 316.5 kWhMay 316.5 kWhMay 116.0 kWhMay 116.0 kWhMay 216.3 kWhMay 216.3 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 Griffith are 41.528 deg latitude, -87.424 deg longitude, and 627 ft elevation.

The topography within 2 miles of Griffith is essentially flat, with a maximum elevation change of 52 feet and an average elevation above sea level of 623 feet. Within 10 miles is essentially flat (213 feet). Within 50 miles contains only modest variations in elevation (541 feet).

The area within 2 miles of Griffith is covered by artificial surfaces (93%), within 10 miles by artificial surfaces (69%) and cropland (14%), and within 50 miles by cropland (47%) and water (23%).

This report illustrates the typical weather in Griffith, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Griffith.

For each station, the records are corrected for the elevation difference between that station and Griffith 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 Griffith is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Griffith 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 Griffith 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 © 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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