Average Weather in July in Earlham Iowa, United States
Daily high temperatures are around 85°F, rarely falling below 76°F or exceeding 94°F. The highest daily average high temperature is 85°F on July 20.
Daily low temperatures are around 66°F, rarely falling below 57°F or exceeding 74°F. The highest daily average low temperature is 67°F on July 22.
For reference, on July 20, the hottest day of the year, temperatures in Earlham typically range from 67°F to 85°F, while on January 21, the coldest day of the year, they range from 16°F to 32°F.
Average High and Low Temperature in July
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. 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 July
The month of July in Earlham experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 31% throughout the month.
The clearest day of the month is July 29, with clear, mostly clear, or partly cloudy conditions 71% of the time.
For reference, on February 13, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on August 26, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.
Cloud Cover Categories in July
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 Earlham, the chance of a wet day over the course of July is gradually decreasing, starting the month at 39% and ending it at 36%.
For reference, the year's highest daily chance of a wet day is 43% on June 7, and its lowest chance is 8% on January 9.
Probability of Precipitation in July
The average sliding 31-day rainfall during July in Earlham is decreasing, starting the month at 4.2 inches, when it rarely exceeds 7.3 inches or falls below 1.7 inches, and ending the month at 3.6 inches, when it rarely exceeds 6.4 inches or falls below 1.3 inches.
Average Monthly Rainfall in July
Over the course of July in Earlham, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 43 minutes, implying an average daily decrease of 1 minute, 26 seconds, and weekly decrease of 10 minutes, 4 seconds.
The shortest day of the month is July 31, with 14 hours, 24 minutes of daylight and the longest day is July 1, with 15 hours, 8 minutes of daylight.
Hours of Daylight and Twilight in July
The earliest sunrise of the month in Earlham is 5:46 AM on July 1 and the latest sunrise is 24 minutes later at 6:10 AM on July 31.
The latest sunset is 8:54 PM on July 1 and the earliest sunset is 19 minutes earlier at 8:34 PM on July 31.
Daylight saving time is observed in Earlham during 2018, but it neither starts nor ends during July, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:42 AM and sets 15 hours, 11 minutes later, at 8:53 PM, while on December 21, the shortest day of the year, it rises at 7:39 AM and sets 9 hours, 10 minutes later, at 4:49 PM.
Sunrise & Sunset with Twilight in July
The chance that a given day will be muggy in Earlham is increasing during July, rising from 46% to 53% over the course of the month.
The highest chance of a muggy day during July is 56% on July 22.
For reference, on July 22, the muggiest day of the year, there are muggy conditions 56% 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 July
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Earlham is gradually decreasing during July, decreasing from 9.0 miles per hour to 8.2 miles per hour over the course of the month.
For reference, on April 1, the windiest day of the year, the daily average wind speed is 12.9 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 8.2 miles per hour.
Average Wind Speed in July
Wind Direction in July
The growing season in Earlham typically lasts for 5.9 months (179 days), from around April 17 to around October 13, rarely starting before March 30 or after May 5, and rarely ending before September 24 or after November 1.
The month of July in Earlham is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in July
The average accumulated growing degree days in Earlham are rapidly increasing during July, increasing by 735°F, from 1,250°F to 1,985°F, over the course of the month.
Growing Degree Days in July
The average daily incident shortwave solar energy in Earlham is essentially constant during July, remaining within 0.2 kWh of 6.8 kWh throughout.
The highest average daily incident shortwave solar energy during July is 7.0 kWh on July 4.
Average Daily Incident Shortwave Solar Energy in July
For the purposes of this report, the geographical coordinates of Earlham are 41.492 deg latitude, -94.124 deg longitude, and 1,076 ft elevation.
The topography within 2 miles of Earlham contains only modest variations in elevation, with a maximum elevation change of 171 feet and an average elevation above sea level of 1,076 feet. Within 10 miles also contains only modest variations in elevation (384 feet). Within 50 miles contains only modest variations in elevation (830 feet).
The area within 2 miles of Earlham is covered by cropland (99%), within 10 miles by cropland (92%), and within 50 miles by cropland (89%).
This report illustrates the typical weather in Earlham 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 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Earlham.
For each station, the records are corrected for the elevation difference between that station and Earlham 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 Earlham is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Earlham and a given station.
The stations contributing to this reconstruction are: Perry Municipal Airport (27%, 38 kilometers, north); Des Moines International Airport (25%, 40 kilometers, east); Creston Municipal Airport (14%, 58 kilometers, south); Osceola Municipal Airport (13%, 61 kilometers, southeast); Audubon County Airport (11%, 70 kilometers, west); and Atlantic Municipal Airport (9%, 78 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .