Average Weather in May in Yuma Arizona, United States
Daily high temperatures increase by 8°F, from 92°F to 99°F, rarely falling below 81°F or exceeding 107°F.
Daily low temperatures increase by 7°F, from 65°F to 72°F, rarely falling below 57°F or exceeding 78°F.
For reference, on July 12, the hottest day of the year, temperatures in Yuma typically range from 83°F to 107°F, while on December 26, the coldest day of the year, they range from 48°F to 68°F.
Average High and Low Temperature in May
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
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 month of May in Yuma experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 18% throughout the month.
The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 84% of the time.
For reference, on February 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 35%, while on September 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 89%.
Cloud Cover Categories in May
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Yuma, the chance of a wet day over the course of May is essentially constant, remaining around 1% throughout.
For reference, the year's highest daily chance of a wet day is 9% on August 27, and its lowest chance is 0% on June 9.
Probability of Precipitation in May
Over the course of May in Yuma, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 40 minutes, implying an average daily increase of 1 minute, 20 seconds, and weekly increase of 9 minutes, 22 seconds.
The shortest day of the month is May 1, with 13 hours, 29 minutes of daylight and the longest day is May 31, with 14 hours, 10 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Yuma is 5:51 AM on May 1 and the earliest sunrise is 19 minutes earlier at 5:31 AM on May 31.
The earliest sunset is 7:20 PM on May 1 and the latest sunset is 21 minutes later at 7:41 PM on May 31.
Daylight saving time is not observed in Yuma during 2021.
For reference, on June 21, the longest day of the year, the Sun rises at 5:31 AM and sets 14 hours, 19 minutes later, at 7:49 PM, while on December 21, the shortest day of the year, it rises at 7:36 AM and sets 10 hours, 0 minutes later, at 5:36 PM.
Sunrise & Sunset with Twilight in May
The figure below presents a compact representation of key lunar data for May 2021. 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
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 Yuma is essentially constant during May, remaining around 0% throughout.
For reference, on August 25, the muggiest day of the year, there are muggy conditions 41% of the time, while on November 25, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in May
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Yuma is gradually decreasing during May, decreasing from 7.9 miles per hour to 7.3 miles per hour over the course of the month.
For reference, on April 27, the windiest day of the year, the daily average wind speed is 8.0 miles per hour, while on September 10, the calmest day of the year, the daily average wind speed is 6.2 miles per hour.
Average Wind Speed in May
The hourly average wind direction in Yuma throughout May is predominantly from the west, with a peak proportion of 52% on May 7.
Wind Direction in May
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).
Temperatures in Yuma are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in May
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
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 Yuma are rapidly increasing during May, increasing by 853°F, from 1,863°F to 2,716°F, over the course of the month.
Growing Degree Days in May
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 Yuma is gradually increasing during May, rising by 0.5 kWh, from 7.9 kWh to 8.4 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of Yuma are 32.725 deg latitude, -114.624 deg longitude, and 144 ft elevation.
The topography within 2 miles of Yuma contains only modest variations in elevation, with a maximum elevation change of 125 feet and an average elevation above sea level of 138 feet. Within 10 miles contains only modest variations in elevation (1,142 feet). Within 50 miles contains very significant variations in elevation (3,832 feet).
The area within 2 miles of Yuma is covered by cropland (47%), artificial surfaces (30%), and shrubs (23%), within 10 miles by cropland (47%) and shrubs (47%), and within 50 miles by shrubs (72%) and cropland (18%).
This report illustrates the typical weather in Yuma, 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 Yuma.
For each station, the records are corrected for the elevation difference between that station and Yuma 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 Yuma is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Yuma and a given station.
The stations contributing to this reconstruction are: Yuma International Airport (94%, 7 kilometers, south); General Rodolfo Sánchez Taboada International Airport (4.0%, 59 kilometers, west); and Blythe Airport (1.8%, 100 kilometers, north).
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.
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.