Average Weather in May in Roland Oklahoma, United States
Daily high temperatures increase by 7°F, from 77°F to 84°F, rarely falling below 66°F or exceeding 90°F.
Daily low temperatures increase by 9°F, from 55°F to 65°F, rarely falling below 45°F or exceeding 71°F.
For reference, on July 26, the hottest day of the year, temperatures in Roland typically range from 72°F to 93°F, while on January 7, the coldest day of the year, they range from 31°F to 49°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
’Aïn el Bell, Algeria (5,280 miles away); Kafr Takhārīm, Syria (6,584 miles); and Shahrisabz, Uzbekistan (7,163 miles) are the far-away foreign places with temperatures most similar to Roland (view comparison).
The month of May in Roland experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 42% throughout the month. The highest chance of overcast or mostly cloudy conditions is 44% on May 15.
The clearest day of the month is May 1, with clear, mostly clear, or partly cloudy conditions 59% of the time.
For reference, on February 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 48%, while on October 5, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 72%.
Cloud Cover Categories in May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Roland, the chance of a wet day over the course of May is gradually increasing, starting the month at 38% and ending it at 42%.
For reference, the year's highest daily chance of a wet day is 44% on May 21, and its lowest chance is 16% on January 19.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Roland is gradually decreasing, starting the month at 5.0 inches, when it rarely exceeds 8.3 inches or falls below 2.0 inches, and ending the month at 4.7 inches, when it rarely exceeds 7.4 inches or falls below 2.2 inches.
The highest average 31-day accumulation is 5.3 inches on May 11.
Average Monthly Rainfall in May
Over the course of May in Roland, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 45 minutes, implying an average daily increase of 1 minute, 30 seconds, and weekly increase of 10 minutes, 29 seconds.
The shortest day of the month is May 1, with 13 hours, 38 minutes of daylight and the longest day is May 31, with 14 hours, 23 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Roland is 6:26 AM on May 1 and the earliest sunrise is 22 minutes earlier at 6:04 AM on May 31.
The earliest sunset is 8:04 PM on May 1 and the latest sunset is 23 minutes later at 8:27 PM on May 31.
Daylight saving time is observed in Roland during 2018, 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 6:03 AM and sets 14 hours, 33 minutes later, at 8:36 PM, while on December 21, the shortest day of the year, it rises at 7:23 AM and sets 9 hours, 46 minutes later, at 5:09 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Roland is very rapidly increasing during May, rising from 10% to 48% over the course of the month.
For reference, on July 22, the muggiest day of the year, there are muggy conditions 84% of the time, while on January 12, 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 Roland is decreasing during May, decreasing from 7.3 miles per hour to 6.3 miles per hour over the course of the month.
For reference, on March 23, the windiest day of the year, the daily average wind speed is 8.2 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 5.0 miles per hour.
Average Wind Speed in May
Wind Direction in May
The growing season in Roland typically lasts for 7.5 months (228 days), from around March 25 to around November 8, rarely starting before March 2 or after April 16, and rarely ending before October 19 or after November 28.
The month of May in Roland is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in May
The average accumulated growing degree days in Roland are rapidly increasing during May, increasing by 574°F, from 681°F to 1,255°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Roland is essentially constant during May, remaining within 0.2 kWh of 6.3 kWh throughout.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of Roland are 35.421 deg latitude, -94.515 deg longitude, and 486 ft elevation.
The topography within 2 miles of Roland contains significant variations in elevation, with a maximum elevation change of 577 feet and an average elevation above sea level of 537 feet. Within 10 miles also contains significant variations in elevation (732 feet). Within 50 miles contains significant variations in elevation (2,339 feet).
The area within 2 miles of Roland is covered by cropland (51%), trees (32%), and artificial surfaces (17%), within 10 miles by cropland (54%) and trees (26%), and within 50 miles by trees (54%) and cropland (40%).
This report illustrates the typical weather in Roland 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 Roland.
For each station, the records are corrected for the elevation difference between that station and Roland 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 Roland is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Roland and a given station.
The stations contributing to this reconstruction are: Fort Smith Municipal Airport (62%, 17 kilometers, southeast); Sallisaw Municipal Airport (32%, 26 kilometers, west); and Drake Field (6%, 73 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .