Average Weather in May in Fortville Indiana, United States
In Fortville, 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 86°F or dropping below 57°F.
Daily low temperatures increase by 10°F, from 49°F to 59°F, rarely falling below 38°F or exceeding 69°F.
For reference, on July 19, the hottest day of the year, temperatures in Fortville typically range from 66°F to 84°F, while on January 29, the coldest day of the year, they range from 21°F to 35°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 Fortville 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 51% of the time.
For reference, on January 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 60%, while on August 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 70%.
Cloud Cover Categories in May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Fortville, the chance of a wet day over the course of May is gradually increasing, starting the month at 37% and ending it at 40%.
For reference, the year's highest daily chance of a wet day is 41% on June 26, and its lowest chance is 20% on January 29.
Probability of Precipitation in May
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 in Fortville is essentially constant, remaining about 4.0 inches throughout, and rarely exceeding 7.0 inches or falling below 1.8 inches.
Average Monthly Rainfall in May
Over the course of May in Fortville, 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, 46 seconds, and weekly increase of 12 minutes, 25 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.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Fortville is 6:43 AM on May 1 and the earliest sunrise is 26 minutes earlier at 6:17 AM on May 31.
The earliest sunset is 8:38 PM on May 1 and the latest sunset is 27 minutes later at 9:05 PM on May 31.
Daylight saving time is observed in Fortville 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 6:15 AM and sets 15 hours, 1 minute later, at 9:15 PM, while on December 21, the shortest day of the year, it rises at 8:01 AM and sets 9 hours, 20 minutes later, at 5:21 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Fortville is rapidly increasing during May, rising from 2% to 17% over the course of the month.
For reference, on July 22, the muggiest day of the year, there are muggy conditions 55% of the time, while on November 16, 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 Fortville is decreasing during May, decreasing from 10.8 miles per hour to 9.1 miles per hour over the course of the month.
For reference, on April 1, the windiest day of the year, the daily average wind speed is 12.2 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 6.9 miles per hour.
Average Wind Speed in May
Wind Direction in May
The growing season in Fortville typically lasts for 6.3 months (192 days), from around April 11 to around October 20, rarely starting before March 26 or after April 27, and rarely ending before October 1 or after November 8.
The month of May in Fortville 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.
Time Spent in Various Temperature Bands and the Growing Season in May
The average accumulated growing degree days in Fortville is increasing during May, increasing by 401°F, from 278°F to 679°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Fortville is gradually increasing during May, rising by 0.6 kWh, from 5.9 kWh to 6.4 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 Fortville are 39.932 deg latitude, -85.848 deg longitude, and 856 ft elevation.
The topography within 2 miles of Fortville is essentially flat, with a maximum elevation change of 82 feet and an average elevation above sea level of 851 feet. Within 10 miles is essentially flat (213 feet). Within 50 miles contains only modest variations in elevation (906 feet).
The area within 2 miles of Fortville is covered by cropland (84%) and trees (11%), within 10 miles by cropland (80%) and artificial surfaces (17%), and within 50 miles by cropland (84%).
This report illustrates the typical weather in Fortville 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 Fortville.
For each station, the records are corrected for the elevation difference between that station and Fortville 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 Fortville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Fortville and a given station.
The stations contributing to this reconstruction are: Indianapolis Executive Airport (27%, 36 kilometers, west); Shelbyville Municipal Airport (23%, 40 kilometers, south); Eagle Creek Airpark (23%, 40 kilometers, west); Delaware County Regional Airport (16%, 51 kilometers, northeast); and Marion Municipal Airport (12%, 63 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .