Average Weather in April in Rockville Minnesota, United States
Daily high temperatures increase by 15°F, from 48°F to 62°F, rarely falling below 34°F or exceeding 77°F.
Daily low temperatures increase by 12°F, from 29°F to 41°F, rarely falling below 16°F or exceeding 53°F.
For reference, on July 18, the hottest day of the year, temperatures in Rockville typically range from 61°F to 82°F, while on January 20, the coldest day of the year, they range from 5°F to 21°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 Rockville experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 53% throughout the month.
The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 48% of the time.
For reference, on February 6, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 61%, while on July 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 72%.
Cloud Cover Categories in April
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Rockville, the chance of a wet day over the course of April is very rapidly increasing, starting the month at 19% and ending it at 28%.
For reference, the year's highest daily chance of a wet day is 40% on June 13, and its lowest chance is 7% on January 28.
Over the course of April in Rockville, the chance of a day with only rain increases from 13% to 26%, the chance of a day with mixed snow and rain decreases from 4% to 1%, and the chance of a day with only snow remains an essentially constant 1% throughout.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Rockville is rapidly increasing, starting the month at 1.4 inches, when it rarely exceeds 2.8 inches or falls below 0.3 inches, and ending the month at 2.6 inches, when it rarely exceeds 4.7 inches or falls below 0.8 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 Rockville is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.7 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in April
Over the course of April in Rockville, 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, 28 minutes, implying an average daily increase of 3 minutes, 2 seconds, and weekly increase of 21 minutes, 12 seconds.
The shortest day of the month is April 1, with 12 hours, 48 minutes of daylight and the longest day is April 30, with 14 hours, 16 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Rockville is 6:57 AM on April 1 and the earliest sunrise is 51 minutes earlier at 6:07 AM on April 30.
The earliest sunset is 7:45 PM on April 1 and the latest sunset is 37 minutes later at 8:22 PM on April 30.
Daylight saving time is observed in Rockville 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 5:28 AM and sets 15 hours, 41 minutes later, at 9:09 PM, while on December 21, the shortest day of the year, it rises at 7:54 AM and sets 8 hours, 42 minutes later, at 4:36 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The chance that a given day will be muggy in Rockville is essentially constant during April, remaining around 0% throughout.
For reference, on July 20, the muggiest day of the year, there are muggy conditions 29% of the time, while on November 15, 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 Rockville is essentially constant during April, remaining within 0.2 miles per hour of 12.3 miles per hour throughout.
For reference, on April 2, the windiest day of the year, the daily average wind speed is 12.6 miles per hour, while on August 1, the calmest day of the year, the daily average wind speed is 8.7 miles per hour.
The highest daily average wind speed during April is 12.6 miles per hour on April 2.
Average Wind Speed in April
Wind Direction in April
The growing season in Rockville typically lasts for 5.0 months (151 days), from around May 3 to around October 2, rarely starting before April 15 or after May 23, and rarely ending before September 14 or after October 19.
The month of April in Rockville is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season rapidly increasing from 1% to 41% 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 Rockville are gradually increasing during April, increasing by 85°F, from 14°F to 99°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Rockville is increasing during April, rising by 1.2 kWh, from 4.6 kWh to 5.7 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 Rockville are 45.472 deg latitude, -94.341 deg longitude, and 1,122 ft elevation.
The topography within 2 miles of Rockville contains only modest variations in elevation, with a maximum elevation change of 184 feet and an average elevation above sea level of 1,116 feet. Within 10 miles contains only modest variations in elevation (499 feet). Within 50 miles also contains significant variations in elevation (659 feet).
The area within 2 miles of Rockville is covered by cropland (67%) and trees (33%), within 10 miles by cropland (69%) and trees (20%), and within 50 miles by cropland (77%) and trees (15%).
This report illustrates the typical weather in Rockville 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 Rockville.
For each station, the records are corrected for the elevation difference between that station and Rockville 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 Rockville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Rockville and a given station.
The stations contributing to this reconstruction are: St. Cloud Regional Airport (34%, 24 kilometers, east); Paynesville Municipal Airport (21%, 34 kilometers, west); Maple Lake Municipal Airport (17%, 38 kilometers, southeast); Litchfield Municipal Airport (17%, 38 kilometers, south); and Little Falls, Little Falls/Morrison County Airport-Lindbergh Field (11%, 53 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .