Average Weather in April in Charlestown Indiana, United States
Daily high temperatures increase by 9°F, from 62°F to 71°F, rarely falling below 48°F or exceeding 82°F.
Daily low temperatures increase by 9°F, from 43°F to 52°F, rarely falling below 31°F or exceeding 64°F.
For reference, on July 20, the hottest day of the year, temperatures in Charlestown typically range from 70°F to 87°F, while on January 29, the coldest day of the year, they range from 27°F to 41°F.
Average High and Low Temperature in April
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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 April
The month of April in Charlestown 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 lowest chance of overcast or mostly cloudy conditions is 48% on April 16.
The clearest day of the month is April 16, 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 58%, while on August 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%.
Cloud Cover Categories in April
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Charlestown, the chance of a wet day over the course of April is gradually increasing, starting the month at 35% and ending it at 38%.
For reference, the year's highest daily chance of a wet day is 41% on June 8, and its lowest chance is 23% on January 13.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Charlestown is increasing, starting the month at 3.9 inches, when it rarely exceeds 6.3 inches or falls below 2.0 inches, and ending the month at 4.6 inches, when it rarely exceeds 8.5 inches or falls below 1.8 inches.
Average Monthly Rainfall in April
Over the course of April in Charlestown, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 8 minutes, implying an average daily increase of 2 minutes, 21 seconds, and weekly increase of 16 minutes, 26 seconds.
The shortest day of the month is April 1, with 12 hours, 39 minutes of daylight and the longest day is April 30, with 13 hours, 47 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Charlestown is 7:27 AM on April 1 and the earliest sunrise is 41 minutes earlier at 6:46 AM on April 30.
The earliest sunset is 8:06 PM on April 1 and the latest sunset is 27 minutes later at 8:33 PM on April 30.
Daylight saving time is observed in Charlestown during 2018, but it neither starts nor ends during April, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:18 AM and sets 14 hours, 51 minutes later, at 9:10 PM, while on December 21, the shortest day of the year, it rises at 7:56 AM and sets 9 hours, 29 minutes later, at 5:25 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The chance that a given day will be muggy in Charlestown is gradually increasing during April, rising from 0% to 3% over the course of the month.
For reference, on July 19, the muggiest day of the year, there are muggy conditions 65% of the time, while on January 11, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in April
The average hourly wind speed in Charlestown is decreasing during April, decreasing from 9.1 miles per hour to 8.1 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 9.2 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 5.2 miles per hour.
Average Wind Speed in April
Wind Direction in April
The growing season in Charlestown typically lasts for 6.9 months (210 days), from around April 5 to around November 1, rarely starting before March 18 or after April 23, and rarely ending before October 15 or after November 20.
During April in Charlestown, the chance that a given day is within the growing season is very rapidly increasing rising from 40% to 97% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in April
The average accumulated growing degree days in Charlestown are increasing during April, increasing by 258°F, from 166°F to 424°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Charlestown is gradually increasing during April, rising by 1.0 kWh, from 4.9 kWh to 5.9 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in April
For the purposes of this report, the geographical coordinates of Charlestown are 38.453 deg latitude, -85.670 deg longitude, and 564 ft elevation.
The topography within 2 miles of Charlestown contains only modest variations in elevation, with a maximum elevation change of 197 feet and an average elevation above sea level of 577 feet. Within 10 miles contains only modest variations in elevation (594 feet). Within 50 miles also contains significant variations in elevation (810 feet).
The area within 2 miles of Charlestown is covered by cropland (65%), artificial surfaces (21%), and trees (13%), within 10 miles by cropland (53%) and trees (31%), and within 50 miles by trees (49%) and cropland (44%).
This report illustrates the typical weather in Charlestown 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 Charlestown.
For each station, the records are corrected for the elevation difference between that station and Charlestown 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 Charlestown is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Charlestown and a given station.
The stations contributing to this reconstruction are: Bowman Field (74%, 25 kilometers, south); Columbus Bakalar Municipal Airport (10%, 93 kilometers, north); Cincinnati/Northern Kentucky International Airport (8%, 109 kilometers, northeast); and Monroe County Airport (8%, 112 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .