May Weather at Chillicothe, Chillicothe Agri-Science Center United States

Daily high temperatures increase by 8°F, from 72°F to 80°F, rarely falling below 60°F or exceeding 89°F.

Daily low temperatures increase by 9°F, from 50°F to 60°F, rarely falling below 39°F or exceeding 68°F.

For reference, on July 19, the hottest day of the year, temperatures at Chillicothe, Chillicothe Agri-Science Center typically range from 69°F to 89°F, while on January 22, the coldest day of the year, they range from 20°F to 38°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.

Yerevan, Armenia (6,319 miles away); Osh City, Kyrgyzstan (6,827 miles); and Cheongju-si, South Korea (6,553 miles) are the far-away foreign places with temperatures most similar to Chillicothe, Chillicothe Agri-Science Center (view comparison).

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The month of May at Chillicothe, Chillicothe Agri-Science Center experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 45% throughout the month.

The clearest day of the month is May 30, with clear, mostly clear, or partly cloudy conditions 56% of the time.

For reference, on February 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 53%, while on August 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Chillicothe, Chillicothe Agri-Science Center, the chance of a wet day over the course of May is rapidly increasing, starting the month at 35% and ending it at 42%.

For reference, the year's highest daily chance of a wet day is 44% on June 7, and its lowest chance is 10% on January 12.

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 Chillicothe, Chillicothe Agri-Science Center is increasing, starting the month at 4.1 inches, when it rarely exceeds 6.7 inches or falls below 1.5 inches, and ending the month at 4.7 inches, when it rarely exceeds 8.0 inches or falls below 2.0 inches.

The highest average 31-day accumulation is 4.7 inches on May 30.

Over the course of May at Chillicothe, Chillicothe Agri-Science Center, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 53 minutes, implying an average daily increase of 1 minute, 45 seconds, and weekly increase of 12 minutes, 18 seconds.

The shortest day of the month is May 1, with 13 hours, 55 minutes of daylight and the longest day is May 31, with 14 hours, 48 minutes of daylight.

The latest sunrise of the month at Chillicothe, Chillicothe Agri-Science Center is 6:14 AM on May 1 and the earliest sunrise is 26 minutes earlier at 5:48 AM on May 31.

The earliest sunset is 8:09 PM on May 1 and the latest sunset is 27 minutes later at 8:36 PM on May 31.

Daylight saving time is observed at Chillicothe, Chillicothe Agri-Science Center 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 5:46 AM and sets 15 hours, 0 minutes later, at 8:46 PM, while on December 21, the shortest day of the year, it rises at 7:32 AM and sets 9 hours, 21 minutes later, at 4:53 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.

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.

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 Chillicothe, Chillicothe Agri-Science Center is rapidly increasing during May, rising from 2% to 21% over the course of the month.

For reference, on July 21, the muggiest day of the year, there are muggy conditions 64% of the time, while on November 18, the least muggy day of the year, there are muggy conditions 0% of the time.

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 Chillicothe, Chillicothe Agri-Science Center is decreasing during May, decreasing from 11.1 miles per hour to 9.5 miles per hour over the course of the month.

For reference, on March 31, the windiest day of the year, the daily average wind speed is 12.3 miles per hour, while on August 6, the calmest day of the year, the daily average wind speed is 7.6 miles per hour.

The hourly average wind direction at Chillicothe, Chillicothe Agri-Science Center throughout May is predominantly from the south, with a peak proportion of 42% on May 30.

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 Chillicothe, Chillicothe Agri-Science Center typically lasts for 6.4 months (196 days), from around April 8 to around October 21, rarely starting before March 22 or after April 25, and rarely ending before October 2 or after November 8.

The month of May at Chillicothe, Chillicothe Agri-Science Center is very likely fully within the growing season, with the chance that a given day is in the growing season gradually increasing from 95% to 100% over the course of the month.

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 Chillicothe, Chillicothe Agri-Science Center are rapidly increasing during May, increasing by 452°F, from 359°F to 811°F, over the course of the month.

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 Chillicothe, Chillicothe Agri-Science Center is gradually increasing during May, rising by 0.6 kWh, from 6.0 kWh to 6.6 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of Chillicothe, Chillicothe Agri-Science Center are 39.817 deg latitude, -93.583 deg longitude, and 778 ft elevation.

The topography within 2 miles of Chillicothe, Chillicothe Agri-Science Center contains only modest variations in elevation, with a maximum elevation change of 171 feet and an average elevation above sea level of 748 feet. Within 10 miles also contains only modest variations in elevation (308 feet). Within 50 miles contains only modest variations in elevation (545 feet).

The area within 2 miles of Chillicothe, Chillicothe Agri-Science Center is covered by cropland (75%), artificial surfaces (13%), and trees (11%), within 10 miles by cropland (86%) and trees (11%), and within 50 miles by cropland (88%) and trees (10%).