Average Weather in April in Pierre South Dakota, United States
Daily low temperatures increase by 11°F, from 32°F to 42°F, rarely falling below 20°F or exceeding 53°F.
For reference, on July 18, the hottest day of the year, temperatures in Pierre typically range from 64°F to 90°F, while on January 2, the coldest day of the year, they range from 12°F to 30°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 Pierre experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 53% to 47%.
The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 53% of the time.
For reference, on March 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on July 24, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 77%.
Cloud Cover Categories in April
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Pierre, the chance of a wet day over the course of April is very rapidly increasing, starting the month at 14% and ending it at 24%.
For reference, the year's highest daily chance of a wet day is 37% on June 5, and its lowest chance is 3% on January 15.
Over the course of April in Pierre, the chance of a day with only rain increases from 10% to 23%, 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 decreases from 2% to 0%.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Pierre is rapidly increasing, starting the month at 1.0 inches, when it rarely exceeds 2.0 inches or falls below 0.1 inches, and ending the month at 2.1 inches, when it rarely exceeds 3.8 inches or falls below 0.5 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 Pierre is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.5 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in April
Over the course of April in Pierre, 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, 24 minutes, implying an average daily increase of 2 minutes, 55 seconds, and weekly increase of 20 minutes, 22 seconds.
The shortest day of the month is April 1, with 12 hours, 47 minutes of daylight and the longest day is April 30, with 14 hours, 11 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Pierre is 7:22 AM on April 1 and the earliest sunrise is 49 minutes earlier at 6:33 AM on April 30.
The earliest sunset is 8:08 PM on April 1 and the latest sunset is 36 minutes later at 8:44 PM on April 30.
Daylight saving time is observed in Pierre 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 5:57 AM and sets 15 hours, 32 minutes later, at 9:29 PM, while on December 21, the shortest day of the year, it rises at 8:14 AM and sets 8 hours, 51 minutes later, at 5:04 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The chance that a given day will be muggy in Pierre is essentially constant during April, remaining around 0% throughout.
For reference, on July 25, the muggiest day of the year, there are muggy conditions 21% of the time, while on October 27, 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 Pierre is essentially constant during April, remaining within 0.2 miles per hour of 12.1 miles per hour throughout.
For reference, on April 1, the windiest day of the year, the daily average wind speed is 12.3 miles per hour, while on July 26, the calmest day of the year, the daily average wind speed is 9.6 miles per hour.
The highest daily average wind speed during April is 12.3 miles per hour on April 1.
Average Wind Speed in April
Wind Direction in April
The growing season in Pierre typically lasts for 5.3 months (162 days), from around April 30 to around October 9, rarely starting before April 11 or after May 21, and rarely ending before September 20 or after October 27.
The month of April in Pierre 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 50% 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 Pierre are gradually increasing during April, increasing by 125°F, from 46°F to 172°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Pierre is increasing during April, rising by 1.2 kWh, from 4.9 kWh to 6.1 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 Pierre are 44.368 deg latitude, -100.351 deg longitude, and 1,519 ft elevation.
The topography within 2 miles of Pierre contains only modest variations in elevation, with a maximum elevation change of 367 feet and an average elevation above sea level of 1,507 feet. Within 10 miles contains only modest variations in elevation (531 feet). Within 50 miles contains significant variations in elevation (1,181 feet).
The area within 2 miles of Pierre is covered by grassland (39%), artificial surfaces (35%), and water (22%), within 10 miles by grassland (70%) and cropland (20%), and within 50 miles by grassland (72%) and cropland (23%).
This report illustrates the typical weather in Pierre 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 Pierre.
For each station, the records are corrected for the elevation difference between that station and Pierre 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 Pierre is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Pierre and a given station.
The stations contributing to this reconstruction are: Pierre Municipal Airport (97%, 5.4 kilometers, east); Philip Municipal Airport (2.2%, 106 kilometers, west); and Faith (1.3%, 151 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .