Average Weather in May in Mount Vernon Indiana, United States
In Mount Vernon, the month of May is characterized by rising daily high temperatures, with daily highs increasing by 9°F, from 68°F to 77°F over the course of the month, and rarely exceeding 87°F or dropping below 56°F.
Daily low temperatures increase by 10°F, from 48°F to 58°F, rarely falling below 38°F or exceeding 69°F.
For reference, on July 19, the hottest day of the year, temperatures in Mount Vernon typically range from 66°F to 85°F, while on January 29, the coldest day of the year, they range from 21°F to 34°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
The month of May in Mount Vernon 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 30, with clear, mostly clear, or partly cloudy conditions 52% of the time.
For reference, on January 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 61%, while on August 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%.
Cloud Cover in May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Mount Vernon, the chance of a wet day over the course of May is increasing, starting the month at 34% and ending it at 40%.
For reference, the year's highest daily chance of a wet day is 41% on May 28, and its lowest chance is 18% on February 5.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Mount Vernon is increasing, starting the month at 3.4 inches, when it rarely exceeds 5.5 inches or falls below 1.6 inches, and ending the month at 4.0 inches, when it rarely exceeds 6.3 inches or falls below 1.9 inches.
Average Monthly Rainfall in May
Over the course of May in Mount Vernon, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 55 minutes, implying an average daily increase of 1 minute, 50 seconds, and weekly increase of 12 minutes, 47 seconds.
The shortest day of the month is May 1, with 13 hours, 58 minutes of daylight and the longest day is May 31, with 14 hours, 53 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Mount Vernon is 6:41 AM on May 1 and the earliest sunrise is 27 minutes earlier at 6:14 AM on May 31.
The earliest sunset is 8:39 PM on May 1 and the latest sunset is 28 minutes later at 9:07 PM on May 31.
Daylight saving time is observed in Mount Vernon during 2017, but it neither starts nor ends during May, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:12 AM and sets 15 hours, 5 minutes later, at 9:17 PM, while on December 21, the shortest day of the year, it rises at 8:03 AM and sets 9 hours, 16 minutes later, at 5:19 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Mount Vernon is rapidly increasing during May, rising from 1% to 16% over the course of the month.
For reference, on July 22, 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
The average hourly wind speed in Mount Vernon is gradually decreasing during May, decreasing from 6.0 miles per hour to 5.1 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 6.8 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 3.9 miles per hour.
Average Wind Speed in May
Wind Direction in May
The average daily incident shortwave solar energy in Mount Vernon is gradually increasing during May, rising by 0.6 kWh, from 5.9 kWh to 6.5 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 Mount Vernon are 40.669 deg latitude, -85.824 deg longitude, and 794 ft elevation.
The topography within 2 miles of Mount Vernon contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 778 feet. Within 10 miles also contains only modest variations in elevation (292 feet). Within 50 miles contains only modest variations in elevation (699 feet).
The area within 2 miles of Mount Vernon is covered by cropland (62%) and trees (27%), within 10 miles by cropland (88%), and within 50 miles by cropland (92%).
This report illustrates the typical weather in Mount Vernon year round, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Mount Vernon.
For each station, the records are corrected for the elevation difference between that station and Mount Vernon 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 Mount Vernon is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mount Vernon and a given station.
The stations contributing to this reconstruction are: Kokomo Municipal Airport (37%, 25 kilometers, southwest); Grissom Air Force Base / Peru (32%, 28 kilometers, west); Fulton County Airport (12%, 53 kilometers, northwest); Delaware County Regional Airport (10%, 61 kilometers, southeast); and Fort Wayne International Airport (10%, 62 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .