May Weather in Old River-Winfree United StatesDaily high temperatures increase by 6°F, from 82°F to 87°F, rarely falling below 76°F or exceeding 92°F. Daily low temperatures increase by 6°F, from 66°F to 72°F, rarely falling below 57°F or exceeding 77°F. For reference, on August 4, the hottest day of the year, temperatures in Old River-Winfree typically range from 76°F to 92°F, while on January 6, the coldest day of the year, they range from 46°F to 62°F. 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. Putian, China (8,015 miles away) is the far-away foreign place with temperatures most similar to Old River-Winfree (view comparison). CloudsThe month of May in Old River-Winfree experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 39% to 34%. The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 66% of the time. For reference, on August 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 50%, while on October 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Old River-Winfree, the chance of a wet day over the course of May is rapidly increasing, starting the month at 27% and ending it at 33%. For reference, the year's highest daily chance of a wet day is 41% on June 23, and its lowest chance is 21% on April 14. RainfallTo 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 Old River-Winfree is increasing, starting the month at 3.9 inches, when it rarely exceeds 7.3 inches or falls below 0.8 inches, and ending the month at 4.7 inches, when it rarely exceeds 9.4 inches or falls below 1.2 inches. SunOver the course of May in Old River-Winfree, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 36 minutes, implying an average daily increase of 1 minute, 11 seconds, and weekly increase of 8 minutes, 17 seconds. The shortest day of the month is May 1, with 13 hours, 21 minutes of daylight and the longest day is May 31, with 13 hours, 56 minutes of daylight. The latest sunrise of the month in Old River-Winfree is 6:36 AM on May 1 and the earliest sunrise is 17 minutes earlier at 6:19 AM on May 31. The earliest sunset is 7:56 PM on May 1 and the latest sunset is 18 minutes later at 8:15 PM on May 31. Daylight saving time is observed in Old River-Winfree 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 6:19 AM and sets 14 hours, 4 minutes later, at 8:23 PM, while on December 21, the shortest day of the year, it rises at 7:11 AM and sets 10 hours, 14 minutes later, at 5:24 PM. 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. MoonThe 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.
HumidityWe 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 Old River-Winfree is very rapidly increasing during May, rising from 56% to 88% over the course of the month. For reference, on July 22, the muggiest day of the year, there are muggy conditions 99% of the time, while on January 23, the least muggy day of the year, there are muggy conditions 5% of the time. WindThis 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 Old River-Winfree is gradually decreasing during May, decreasing from 8.7 miles per hour to 7.7 miles per hour over the course of the month. For reference, on April 10, the windiest day of the year, the daily average wind speed is 8.9 miles per hour, while on August 14, the calmest day of the year, the daily average wind speed is 6.0 miles per hour. The hourly average wind direction in Old River-Winfree throughout May is predominantly from the south, with a peak proportion of 68% on May 31. Water TemperatureOld River-Winfree 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 Old River-Winfree is increasing during May, rising by 7°F, from 74°F to 81°F, over the course of the month. Growing SeasonDefinitions 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 Old River-Winfree typically lasts for 11 months (333 days), from around January 26 to around December 24, rarely starting after March 5, or ending before November 27. The month of May in Old River-Winfree is reliably fully 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 Old River-Winfree are rapidly increasing during May, increasing by 779°F, from 1,437°F to 2,216°F, over the course of the month. Solar EnergyThis 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 Old River-Winfree is essentially constant during May, remaining within 0.1 kWh of 6.5 kWh throughout. TopographyFor the purposes of this report, the geographical coordinates of Old River-Winfree are 29.868 deg latitude, -94.833 deg longitude, and 36 ft elevation. The topography within 2 miles of Old River-Winfree is essentially flat, with a maximum elevation change of 36 feet and an average elevation above sea level of 26 feet. Within 10 miles is also essentially flat (82 feet). Within 50 miles is essentially flat (331 feet). The area within 2 miles of Old River-Winfree is covered by herbaceous vegetation (51%) and cropland (38%), within 10 miles by herbaceous vegetation (49%) and cropland (29%), and within 50 miles by herbaceous vegetation (29%) and cropland (23%). Data SourcesThis report illustrates the typical weather in Old River-Winfree, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Old River-Winfree. For each station, the records are corrected for the elevation difference between that station and Old River-Winfree 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 Old River-Winfree is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Old River-Winfree 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 Old River-Winfree 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 DataAll 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. DisclaimerThe 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. Please review our full terms contained on our Terms of Service page. |