Average Weather in April in Mount Vernon Indiana, United States
Daily low temperatures increase by 10°F, from 38°F to 48°F, rarely falling below 27°F or exceeding 60°F.
For reference, on July 19, the hottest day of the year, temperatures in Mount Vernon typically range from 66°F to 84°F, while on January 29, the coldest day of the year, they range from 20°F to 34°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
Bucharest, Romania (5,208 miles away); Samashki, Russia (5,893 miles); and Damāvand, Iran (6,528 miles) are the far-away foreign places with temperatures most similar to Mount Vernon (view comparison).
The month of April in Mount Vernon experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 51% throughout the month.
The clearest day of the month is April 25, with clear, mostly clear, or partly cloudy conditions 50% of the time.
For reference, on January 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 61%, 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 Mount Vernon, the chance of a wet day over the course of April is gradually increasing, starting the month at 31% and ending it at 34%.
For reference, the year's highest daily chance of a wet day is 41% on May 28, and its lowest chance is 18% on February 5.
Over the course of April in Mount Vernon, the chance of a day with only rain increases from 30% to 34%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 0% throughout.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Mount Vernon is increasing, starting the month at 2.8 inches, when it rarely exceeds 4.4 inches or falls below 1.3 inches, and ending the month at 3.3 inches, when it rarely exceeds 5.5 inches or falls below 1.6 inches.
Average Monthly Rainfall in April
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during April in Mount Vernon is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.3 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in April
Over the course of April in Mount Vernon, 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, 14 minutes, implying an average daily increase of 2 minutes, 33 seconds, and weekly increase of 17 minutes, 48 seconds.
The shortest day of the month is April 1, with 12 hours, 42 minutes of daylight and the longest day is April 30, with 13 hours, 56 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Mount Vernon is 7:26 AM on April 1 and the earliest sunrise is 43 minutes earlier at 6:42 AM on April 30.
The earliest sunset is 8:08 PM on April 1 and the latest sunset is 30 minutes later at 8:38 PM on April 30.
Daylight saving time is observed in Mount Vernon during 2017, 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 6:12 AM and sets 15 hours, 5 minutes later, at 9:17 PM, while on December 21, the shortest day of the year, it rises at 8:03 AM and sets 9 hours, 16 minutes later, at 5:19 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The chance that a given day will be muggy in Mount Vernon is essentially constant during April, remaining around 0% throughout.
For reference, on July 27, the muggiest day of the year, there are muggy conditions 48% 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 April
The average hourly wind speed in Mount Vernon is decreasing during April, decreasing from 12.5 miles per hour to 11.3 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 12.6 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 7.1 miles per hour.
The highest daily average wind speed during April is 12.5 miles per hour on April 2.
Average Wind Speed in April
Wind Direction in April
The growing season in Mount Vernon typically lasts for 6.3 months (191 days), from around April 14 to around October 23, rarely starting before March 27 or after May 3, and rarely ending before October 2 or after November 14.
During April in Mount Vernon, the chance that a given day is within the growing season is very rapidly increasing rising from 18% to 86% 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 Mount Vernon are gradually increasing during April, increasing by 164°F, from 69°F to 234°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Mount Vernon is increasing during April, rising by 1.1 kWh, from 4.7 kWh to 5.8 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 Mount Vernon are 40.669 deg latitude, -85.824 deg longitude, and 794 ft elevation.
The topography within 2 miles of Mount Vernon contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 778 feet. Within 10 miles also contains only modest variations in elevation (292 feet). Within 50 miles contains only modest variations in elevation (699 feet).
The area within 2 miles of Mount Vernon is covered by cropland (62%) and trees (27%), within 10 miles by cropland (88%), and within 50 miles by cropland (92%).
This report illustrates the typical weather in Mount Vernon 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 Mount Vernon.
For each station, the records are corrected for the elevation difference between that station and Mount Vernon 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 Mount Vernon is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mount Vernon and a given station.
The stations contributing to this reconstruction are: Marion Municipal Airport (31%, 24 kilometers, southeast); Kokomo Municipal Airport (28%, 25 kilometers, southwest); Grissom Air Force Base / Peru (25%, 28 kilometers, west); Fulton County Airport (9%, 53 kilometers, northwest); and Fort Wayne International Airport (7%, 62 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .