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May Weather at Bradley International Airport Connecticut, United States

Daily high temperatures increase by 9°F, from 67°F to 75°F, rarely falling below 55°F or exceeding 87°F.

Daily low temperatures increase by 9°F, from 45°F to 55°F, rarely falling below 36°F or exceeding 64°F.

For reference, on July 20, the hottest day of the year, temperatures at Bradley International Airport typically range from 65°F to 84°F, while on January 29, the coldest day of the year, they range from 19°F to 35°F.

Average High and Low Temperature in May at Bradley International Airport

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 at Bradley International Airport

Average Hourly Temperature in May at Bradley International AirportMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 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.

Odessa, Ukraine (4,741 miles away); Dzorastan, Armenia (5,655 miles); and Damāvand, Iran (6,043 miles) are the far-away foreign places with temperatures most similar to Bradley International Airport (view comparison).

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The month of May at Bradley International Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 52% throughout the month.

The clearest day of the month is May 2, with clear, mostly clear, or partly cloudy conditions 49% of the time.

For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on September 5, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.

Cloud Cover Categories in May at Bradley International Airport

Cloud Cover Categories in May at Bradley International AirportMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJunMay 149%May 149%May 3148%May 3148%May 1149%May 1149%May 2148%May 2148%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. At Bradley International Airport, the chance of a wet day over the course of May is rapidly increasing, starting the month at 29% and ending it at 36%.

For reference, the year's highest daily chance of a wet day is 37% on May 30, and its lowest chance is 21% on January 29.

Probability of Precipitation in May at Bradley International Airport

Probability of Precipitation in May at Bradley International AirportMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%AprJunMay 2937%May 2937%May 129%May 129%May 1132%May 1132%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 at Bradley International Airport is increasing, starting the month at 3.3 inches, when it rarely exceeds 5.6 inches or falls below 1.5 inches, and ending the month at 3.8 inches, when it rarely exceeds 7.0 inches or falls below 1.5 inches.

Average Monthly Rainfall in May at Bradley International Airport

Average Monthly Rainfall in May at Bradley International AirportMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inAprJunMay 13.3 inMay 13.3 inMay 313.8 inMay 313.8 inMay 113.4 inMay 113.4 inMay 213.6 inMay 213.6 inNowNow
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 at Bradley International Airport, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 57 minutes, implying an average daily increase of 1 minute, 55 seconds, and weekly increase of 13 minutes, 22 seconds.

The shortest day of the month is May 1, with 14 hours, 4 minutes of daylight and the longest day is May 31, with 15 hours, 1 minute of daylight.

Hours of Daylight and Twilight in May at Bradley International Airport

Hours of Daylight and Twilight in May at Bradley International AirportMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAprJunnightnightdaydayMay 114 hr, 4 minMay 114 hr, 4 minMay 3115 hr, 1 minMay 3115 hr, 1 minMay 1614 hr, 37 minMay 1614 hr, 37 minNowNow
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 at Bradley International Airport is 5:46 AM on May 1 and the earliest sunrise is 28 minutes earlier at 5:18 AM on May 31.

The earliest sunset is 7:50 PM on May 1 and the latest sunset is 29 minutes later at 8:19 PM on May 31.

Daylight saving time is observed at Bradley International Airport 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, 14 minutes later, at 8:29 PM, while on December 21, the shortest day of the year, it rises at 7:15 AM and sets 9 hours, 7 minutes later, at 4:22 PM.

Sunrise & Sunset with Twilight in May at Bradley International Airport

Sunrise & Sunset with Twilight in May at Bradley International AirportMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAprJun5:18 AM5:18 AMMay 318:19 PMMay 318:19 PM5:46 AM5:46 AMMay 17:50 PMMay 17:50 PM5:34 AM5:34 AMMay 118:00 PMMay 118:00 PM5:24 AM5:24 AMMay 218:10 PMMay 218:10 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 at Bradley International Airport

Solar Elevation and Azimuth in May at Bradley International AirportMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMAprJun0010102020203030404050505060600001010202030303040405050606070NowNow
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 at Bradley International Airport

Moon Rise, Set & Phases in May at Bradley International AirportMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAprJunApr 82:22 PMApr 82:22 PMApr 237:50 PMApr 237:50 PMMay 711:23 PMMay 711:23 PMMay 239:54 AMMay 239:54 AMJun 68:38 AMJun 68:38 AMJun 219:09 PMJun 219:09 PM6:15 AM6:15 AM7:37 PM7:37 PM7:40 PM7:40 PM6:02 AM6:02 AM5:05 AM5:05 AM7:48 PM7:48 PM7:41 PM7:41 PM5:00 AM5:00 AM4:50 AM4:50 AM9:11 PM9:11 PM8:48 PM8:48 PM5:16 AM5:16 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%2:30 AMESE12:02 PMWSW-7:16 AMS232,179 mi
2
39%3:02 AMESE1:19 PMWSW-8:10 AMS229,848 mi
3
27%3:28 AMESE2:36 PMWSW-9:01 AMS227,856 mi
4
17%3:52 AME3:53 PMW-9:50 AMS226,408 mi
5
9%4:15 AME5:10 PMW-10:39 AMS225,702 mi
6
3%4:39 AMENE6:28 PMWNW-11:29 AMS225,895 mi
7
0%5:05 AMENE7:48 PMWNW-12:21 PMS227,060 mi
8
0%5:36 AMENE9:08 PMWNW-1:16 PMS229,160 mi
9
4%6:14 AMNE10:23 PMNW-2:14 PMS232,041 mi
10
9%7:01 AMNE11:30 PMNW-3:14 PMS235,451 mi
11
17%7:57 AMNE--4:12 PMS239,083 mi
12
25%-12:25 AMNW9:00 AMNE5:08 PMS242,619 mi
13
35%-1:08 AMNW10:07 AMNE5:59 PMS245,780 mi
14
45%-1:42 AMWNW11:14 AMENE6:46 PMS248,349 mi
15
50%-2:08 AMWNW12:19 PMENE7:29 PMS250,179 mi
16
64%-2:31 AMWNW1:22 PMENE8:09 PMS251,200 mi
17
73%-2:50 AMW2:23 PME8:48 PMS251,409 mi
18
81%-3:08 AMW3:23 PME9:26 PMS250,865 mi
19
88%-3:26 AMW4:25 PME10:06 PMS249,671 mi
20
94%-3:44 AMWSW5:28 PMESE10:47 PMS247,964 mi
21
98%-4:05 AMWSW6:33 PMESE11:32 PMS245,899 mi
22
99%-4:30 AMWSW7:41 PMESE--
23
100%-5:00 AMWSW8:51 PMSE12:21 AMS243,631 mi
24
100%-5:39 AMSW9:58 PMSE1:15 AMS241,302 mi
25
97%-6:28 AMSW10:58 PMSE2:13 AMS239,031 mi
26
92%-7:28 AMSW11:49 PMSE3:13 AMS236,899 mi
27
85%-8:37 AMSW-4:14 AMS234,954 mi
28
75%12:31 AMESE9:52 AMWSW-5:12 AMS233,220 mi
29
65%1:04 AMESE11:08 AMWSW-6:06 AMS231,709 mi
30
50%1:32 AMESE12:24 PMWSW-6:57 AMS230,445 mi
31
41%1:56 AME1:39 PMW-7:46 AMS229,476 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 Bradley International Airport is increasing during May, rising from 0% to 7% over the course of the month.

For reference, on July 29, the muggiest day of the year, there are muggy conditions 37% 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 at Bradley International Airport

Humidity Comfort Levels in May at Bradley International AirportMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AprJunMay 10%May 10%May 317%May 317%May 111%May 111%May 213%May 213%NowNowmuggymuggyhumidhumidcomfortablecomfortabledrydryoppressiveoppressive
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 Bradley International Airport is gradually decreasing during May, decreasing from 4.9 miles per hour to 4.1 miles per hour over the course of the month.

For reference, on February 26, the windiest day of the year, the daily average wind speed is 6.6 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 3.6 miles per hour.

Average Wind Speed in May at Bradley International Airport

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 at Bradley International Airport throughout May is predominantly from the west, with a peak proportion of 35% on May 30.

Wind Direction in May at Bradley International Airport

Wind Direction in May at Bradley International AirportMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%AprJunNowNowwestsouthnortheast
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).

Bradley International 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 Bradley International Airport is rapidly increasing during May, rising by 9°F, from 48°F to 57°F, over the course of the month.

Average Water Temperature in May at Bradley International Airport

Average Water Temperature in May at Bradley International AirportMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313135°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°FAprJunMay 148°FMay 148°FMay 3157°FMay 3157°FMay 1151°FMay 1151°FMay 2154°FMay 2154°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 at Bradley International Airport typically lasts for 6.0 months (182 days), from around April 17 to around October 16, rarely starting before April 1 or after May 5, and rarely ending before September 29 or after November 3.

The month of May at Bradley International Airport is more likely than not fully within the growing season, with the chance that a given day is in the growing season increasing from 84% to 100% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in May at Bradley International Airport

Time Spent in Various Temperature Bands and the Growing Season in May at Bradley International Airportgrowing seasonMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJun84%May 184%May 1100%May 31100%May 3195%May 1195%May 1199%May 2199%May 2150%Apr 1750%Apr 17NowNowvery 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 at Bradley International Airport are increasing during May, increasing by 321°F, from 173°F to 494°F, over the course of the month.

Growing Degree Days in May at Bradley International Airport

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 at Bradley International Airport is gradually increasing during May, rising by 0.6 kWh, from 5.8 kWh to 6.4 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in May at Bradley International Airport

Average Daily Incident Shortwave Solar Energy in May at Bradley International AirportMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 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 316.4 kWhMay 316.4 kWhMay 116.1 kWhMay 116.1 kWhMay 216.3 kWhMay 216.3 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 Bradley International Airport are 41.938 deg latitude, -72.688 deg longitude, and 180 ft elevation.

The topography within 2 miles of Bradley International Airport contains only modest variations in elevation, with a maximum elevation change of 243 feet and an average elevation above sea level of 166 feet. Within 10 miles contains only modest variations in elevation (1,125 feet). Within 50 miles contains very significant variations in elevation (2,605 feet).

The area within 2 miles of Bradley International Airport is covered by artificial surfaces (57%) and trees (35%), within 10 miles by trees (54%) and artificial surfaces (34%), and within 50 miles by trees (81%) and artificial surfaces (12%).

This report illustrates the typical weather at Bradley International 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

Bradley International 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 Hartford-Brainard Airport, Barnes Municipal Airport, Westover Air Reserve Base / Metropolitan Airport, Meriden Markham Municipal Airport, Windham Airport, Chester Airport, Waterbury-Oxford Airport, and Tweed-New Haven 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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