Average Weather in April in Arco Idaho, United States
Daily high temperatures increase by 9°F, from 51°F to 60°F, rarely falling below 40°F or exceeding 74°F.
Daily low temperatures increase by 7°F, from 30°F to 36°F, rarely falling below 22°F or exceeding 45°F.
For reference, on July 26, the hottest day of the year, temperatures in Arco typically range from 53°F to 85°F, while on January 1, the coldest day of the year, they range from 12°F to 27°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 Arco experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 52% throughout the month.
The clearest day of the month is April 26, with clear, mostly clear, or partly cloudy conditions 50% of the time.
For reference, on January 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 56%, while on July 27, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 81%.
Cloud Cover Categories in April
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Arco, the chance of a wet day over the course of April is gradually increasing, starting the month at 13% and ending it at 17%.
For reference, the year's highest daily chance of a wet day is 20% on May 23, and its lowest chance is 7% on July 6.
Over the course of April in Arco, the chance of a day with only rain increases from 9% to 16%, the chance of a day with mixed snow and rain decreases from 3% to 1%, 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 Arco is essentially constant, remaining about 0.8 inches throughout, and rarely exceeding 1.7 inches or falling below 0.1 inches.
Average Monthly Rainfall in April
Over the course of April in Arco, 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, 22 minutes, implying an average daily increase of 2 minutes, 50 seconds, and weekly increase of 19 minutes, 48 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, 9 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Arco is 7:13 AM on April 1 and the earliest sunrise is 48 minutes earlier at 6:26 AM on April 30.
The earliest sunset is 8:00 PM on April 1 and the latest sunset is 34 minutes later at 8:35 PM on April 30.
Daylight saving time is observed in Arco during 2020, but it neither starts nor ends during April, so the entire month is in daylight saving time.
For reference, on June 20, the longest day of the year, the Sun rises at 5:51 AM and sets 15 hours, 27 minutes later, at 9:18 PM, while on December 21, the shortest day of the year, it rises at 8:03 AM and sets 8 hours, 56 minutes later, at 4:59 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The chance that a given day will be muggy in Arco is essentially constant during April, remaining around 0% throughout.
Humidity Comfort Levels in April
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Arco is essentially constant during April, remaining within 0.1 miles per hour of 7.9 miles per hour throughout.
For reference, on March 28, the windiest day of the year, the daily average wind speed is 8.0 miles per hour, while on December 25, the calmest day of the year, the daily average wind speed is 5.8 miles per hour.
Average Wind Speed in April
The hourly average wind direction in Arco throughout April is predominantly from the west, with a peak proportion of 42% on April 3.
Wind Direction in April
The growing season in Arco typically lasts for 4.1 months (127 days), from around May 21 to around September 25, rarely starting before May 1 or after June 15, and rarely ending before September 6 or after October 13.
The month of April in Arco is very likely fully outside of the growing season, with the chance that a given day is in the growing season gradually increasing from 0% to 9% 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 Arco are gradually increasing during April, increasing by 64°F, from 15°F to 79°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Arco is increasing during April, rising by 1.1 kWh, from 5.3 kWh to 6.4 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 Arco are 43.637 deg latitude, -113.300 deg longitude, and 5,377 ft elevation.
The topography within 2 miles of Arco contains large variations in elevation, with a maximum elevation change of 2,005 feet and an average elevation above sea level of 5,521 feet. Within 10 miles contains large variations in elevation (5,404 feet). Within 50 miles also contains extreme variations in elevation (8,304 feet).
The area within 2 miles of Arco is covered by shrubs (81%) and cropland (14%), within 10 miles by shrubs (77%) and cropland (16%), and within 50 miles by shrubs (76%).
This report illustrates the typical weather in Arco 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 Arco.
For each station, the records are corrected for the elevation difference between that station and Arco 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 Arco is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Arco and a given station.
The stations contributing to this reconstruction are: Friedman Memorial Airport (29%, 82 kilometers, west); Pocatello Regional Airport (21%, 99 kilometers, southeast); Fanning Field (21%, 101 kilometers, east); Challis Airport (16%, 123 kilometers, northwest); and Burley Municipal Airport (14%, 128 kilometers, south).
Time zones for aiports and weather stations are provided by AskGeo.com .