Average Weather in April in Carroll Iowa, United States
Daily high temperatures increase by 12°F, from 56°F to 68°F, rarely falling below 39°F or exceeding 83°F.
Daily low temperatures increase by 11°F, from 34°F to 45°F, rarely falling below 23°F or exceeding 57°F.
For reference, on July 10, the hottest day of the year, temperatures in Carroll typically range from 65°F to 85°F, while on January 20, the coldest day of the year, they range from 13°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 Carroll experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 50% throughout the month.
The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 52% of the time.
For reference, on December 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, 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 Carroll, the chance of a wet day over the course of April is very rapidly increasing, starting the month at 23% and ending it at 35%.
For reference, the year's highest daily chance of a wet day is 44% on June 7, and its lowest chance is 8% on January 11.
Over the course of April in Carroll, the chance of a day with only rain increases from 20% to 34%, the chance of a day with mixed snow and rain decreases from 3% to 0%, 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 Carroll is rapidly increasing, starting the month at 2.0 inches, when it rarely exceeds 3.6 inches or falls below 0.6 inches, and ending the month at 3.4 inches, when it rarely exceeds 5.7 inches or falls below 1.3 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 Carroll is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.3 inches or falling to 0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in April
Over the course of April in Carroll, 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, 18 minutes, implying an average daily increase of 2 minutes, 41 seconds, and weekly increase of 18 minutes, 45 seconds.
The shortest day of the month is April 1, with 12 hours, 43 minutes of daylight and the longest day is April 30, with 14 hours, 1 minute of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Carroll is 7:02 AM on April 1 and the earliest sunrise is 45 minutes earlier at 6:16 AM on April 30.
The earliest sunset is 7:45 PM on April 1 and the latest sunset is 32 minutes later at 8:17 PM on April 30.
Daylight saving time is observed in Carroll 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 5:43 AM and sets 15 hours, 15 minutes later, at 8:58 PM, while on December 21, the shortest day of the year, it rises at 7:44 AM and sets 9 hours, 7 minutes later, at 4:50 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The chance that a given day will be muggy in Carroll is essentially constant during April, remaining around 0% throughout.
For reference, on July 21, the muggiest day of the year, there are muggy conditions 53% of the time, while on January 1, 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 Carroll is gradually decreasing during April, decreasing from 13.3 miles per hour to 12.7 miles per hour over the course of the month.
For reference, on April 12, the windiest day of the year, the daily average wind speed is 13.3 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 8.4 miles per hour.
The highest daily average wind speed during April is 13.3 miles per hour on April 12.
Average Wind Speed in April
Wind Direction in April
The growing season in Carroll typically lasts for 5.4 months (163 days), from around April 25 to around October 4, rarely starting before April 7 or after May 13, and rarely ending before September 16 or after October 24.
During April in Carroll, the chance that a given day is within the growing season is very rapidly increasing rising from 5% to 64% 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 Carroll are gradually increasing during April, increasing by 147°F, from 51°F to 198°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Carroll is 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 Carroll are 42.066 deg latitude, -94.867 deg longitude, and 1,276 ft elevation.
The topography within 2 miles of Carroll contains only modest variations in elevation, with a maximum elevation change of 164 feet and an average elevation above sea level of 1,270 feet. Within 10 miles also contains only modest variations in elevation (433 feet). Within 50 miles contains only modest variations in elevation (705 feet).
The area within 2 miles of Carroll is covered by cropland (73%) and artificial surfaces (27%), within 10 miles by cropland (99%), and within 50 miles by cropland (97%).
This report illustrates the typical weather in Carroll 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 Carroll.
For each station, the records are corrected for the elevation difference between that station and Carroll 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 Carroll is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Carroll and a given station.
The stations contributing to this reconstruction are: Arthur N Neu Airport (91%, 7 kilometers, east); Denison Municipal Airport (6%, 43 kilometers, west); and Storm Lake Municipal Airport (3.2%, 67 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .