Average Weather in May in Roanoke Indiana, United States
In Roanoke, the month of May is characterized by rapidly rising daily high temperatures, with daily highs increasing by 9°F, from 67°F to 76°F over the course of the month, and rarely exceeding 86°F or dropping below 55°F.
Daily low temperatures increase by 10°F, from 47°F to 57°F, rarely falling below 36°F or exceeding 67°F.
For reference, on July 19, the hottest day of the year, temperatures in Roanoke typically range from 65°F to 84°F, while on January 29, the coldest day of the year, they range from 19°F to 32°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 Roanoke 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 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 62%, while on August 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%.
Cloud Cover Categories in May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Roanoke, 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 27, and its lowest chance is 17% on February 5.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Roanoke is increasing, starting the month at 3.1 inches, when it rarely exceeds 5.2 inches or falls below 1.5 inches, and ending the month at 3.8 inches, when it rarely exceeds 6.1 inches or falls below 1.6 inches.
Average Monthly Rainfall in May
Over the course of May in Roanoke, 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, 51 seconds, and weekly increase of 12 minutes, 56 seconds.
The shortest day of the month is May 1, with 13 hours, 59 minutes of daylight and the longest day is May 31, with 14 hours, 55 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Roanoke is 6:39 AM on May 1 and the earliest sunrise is 27 minutes earlier at 6:12 AM on May 31.
The earliest sunset is 8:38 PM on May 1 and the latest sunset is 28 minutes later at 9:06 PM on May 31.
Daylight saving time is observed in Roanoke 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 6:09 AM and sets 15 hours, 7 minutes later, at 9:17 PM, while on December 21, the shortest day of the year, it rises at 8:02 AM and sets 9 hours, 14 minutes later, at 5:16 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Roanoke is rapidly increasing during May, rising from 1% to 13% over the course of the month.
For reference, on July 27, the muggiest day of the year, there are muggy conditions 45% 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 Roanoke is decreasing during May, decreasing from 11.1 miles per hour to 9.4 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 12.7 miles per hour, while on August 13, the calmest day of the year, the daily average wind speed is 7.2 miles per hour.
Average Wind Speed in May
Wind Direction in May
The growing season in Roanoke typically lasts for 6.0 months (182 days), from around April 19 to around October 18, rarely starting before April 2 or after May 7, and rarely ending before September 29 or after November 5.
The month of May in Roanoke is more likely than not fully within the growing season, with the chance that a given day is in the growing season increasing from 80% 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 Roanoke is increasing during May, increasing by 353°F, from 211°F to 565°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Roanoke is gradually increasing during May, rising by 0.6 kWh, from 5.8 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 Roanoke are 40.963 deg latitude, -85.373 deg longitude, and 794 ft elevation.
The topography within 2 miles of Roanoke is essentially flat, with a maximum elevation change of 95 feet and an average elevation above sea level of 780 feet. Within 10 miles is essentially flat (217 feet). Within 50 miles contains only modest variations in elevation (541 feet).
The area within 2 miles of Roanoke is covered by cropland (100%), within 10 miles by cropland (88%), and within 50 miles by cropland (92%).
This report illustrates the typical weather in Roanoke 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Roanoke.
For each station, the records are corrected for the elevation difference between that station and Roanoke 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 Roanoke is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Roanoke and a given station.
The stations contributing to this reconstruction are: Fort Wayne International Airport (80%, 14 kilometers, east); Warsaw Municipal Airport (11%, 52 kilometers, northwest); and Marion Municipal Airport (9%, 59 kilometers, southwest).
Time zones for aiports and weather stations are provided by AskGeo.com .