Average Weather in May in New Castle Kentucky, United States
In New Castle, the month of May is characterized by rising daily high temperatures, with daily highs increasing by 8°F, from 70°F to 78°F over the course of the month, and rarely exceeding 86°F or dropping below 59°F.
Daily low temperatures increase by 9°F, from 51°F to 60°F, rarely falling below 39°F or exceeding 69°F.
For reference, on July 21, the hottest day of the year, temperatures in New Castle typically range from 68°F to 86°F, while on January 29, the coldest day of the year, they range from 25°F to 40°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 New Castle experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 49% throughout the month.
The clearest day of the month is May 1, 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 59%, 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 New Castle, the chance of a wet day over the course of May is essentially constant, remaining around 40% throughout.
For reference, the year's highest daily chance of a wet day is 41% on May 12, and its lowest chance is 23% on January 13.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in New Castle is gradually decreasing, starting the month at 4.5 inches, when it rarely exceeds 8.0 inches or falls below 1.7 inches, and ending the month at 4.0 inches, when it rarely exceeds 7.1 inches or falls below 1.7 inches.
The highest average 31-day accumulation is 4.5 inches on May 7.
Average Monthly Rainfall in May
Over the course of May in New Castle, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 50 minutes, implying an average daily increase of 1 minute, 40 seconds, and weekly increase of 11 minutes, 43 seconds.
The shortest day of the month is May 1, with 13 hours, 49 minutes of daylight and the longest day is May 31, with 14 hours, 39 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in New Castle is 6:43 AM on May 1 and the earliest sunrise is 25 minutes earlier at 6:18 AM on May 31.
The earliest sunset is 8:32 PM on May 1 and the latest sunset is 26 minutes later at 8:58 PM on May 31.
Daylight saving time is observed in New Castle 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 6:17 AM and sets 14 hours, 51 minutes later, at 9:08 PM, while on December 21, the shortest day of the year, it rises at 7:54 AM and sets 9 hours, 29 minutes later, at 5:23 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in New Castle is very rapidly increasing during May, rising from 2% to 25% over the course of the month.
For reference, on July 24, the muggiest day of the year, there are muggy conditions 63% of the time, while on November 30, 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 New Castle is decreasing during May, decreasing from 6.6 miles per hour to 5.4 miles per hour over the course of the month.
For reference, on February 25, the windiest day of the year, the daily average wind speed is 7.8 miles per hour, while on August 1, the calmest day of the year, the daily average wind speed is 4.3 miles per hour.
Average Wind Speed in May
Wind Direction in May
The growing season in New Castle typically lasts for 6.4 months (196 days), from around April 12 to around October 25, rarely starting before March 26 or after April 28, and rarely ending before October 8 or after November 11.
The month of May in New Castle is very likely fully within the growing season, with the chance that a given day is in the growing season gradually increasing from 93% 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 New Castle is increasing during May, increasing by 439°F, from 389°F to 828°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in New Castle is gradually increasing during May, rising by 0.5 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 New Castle are 38.433 deg latitude, -85.170 deg longitude, and 853 ft elevation.
The topography within 2 miles of New Castle contains only modest variations in elevation, with a maximum elevation change of 285 feet and an average elevation above sea level of 833 feet. Within 10 miles contains only modest variations in elevation (538 feet). Within 50 miles also contains significant variations in elevation (810 feet).
The area within 2 miles of New Castle is covered by cropland (98%), within 10 miles by cropland (75%) and trees (25%), and within 50 miles by cropland (47%) and trees (44%).
This report illustrates the typical weather in New Castle 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in New Castle.
For each station, the records are corrected for the elevation difference between that station and New Castle 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 New Castle is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between New Castle and a given station.
The stations contributing to this reconstruction are: Capital City Airport (48%, 36 kilometers, southeast); Bowman Field (29%, 49 kilometers, southwest); Cincinnati/Northern Kentucky International Airport (14%, 81 kilometers, northeast); and Columbus Bakalar Municipal Airport (9%, 112 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .