Average Weather in August in Jerome Idaho, United States
Daily high temperatures decrease by 6°F, from 89°F to 82°F, rarely falling below 72°F or exceeding 96°F.
Daily low temperatures decrease by 6°F, from 61°F to 55°F, rarely falling below 47°F or exceeding 68°F.
For reference, on July 25, the hottest day of the year, temperatures in Jerome typically range from 61°F to 89°F, while on December 29, the coldest day of the year, they range from 22°F to 34°F.
Average High and Low Temperature in August
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. 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 August
The month of August in Jerome experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 17% to 22%.
The clearest day of the month is August 1, with clear, mostly clear, or partly cloudy conditions 83% of the time.
For reference, on January 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 55%, while on July 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 83%.
Cloud Cover Categories in August
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 Jerome, the chance of a wet day over the course of August is gradually increasing, starting the month at 5% and ending it at 7%.
For reference, the year's highest daily chance of a wet day is 19% on November 30, and its lowest chance is 4% on July 21.
Probability of Precipitation in August
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during August in Jerome is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 0.8 inches.
Average Monthly Rainfall in August
Over the course of August in Jerome, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 17 minutes, implying an average daily decrease of 2 minutes, 34 seconds, and weekly decrease of 17 minutes, 55 seconds.
The shortest day of the month is August 31, with 13 hours, 11 minutes of daylight and the longest day is August 1, with 14 hours, 27 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Jerome is 6:30 AM on August 1 and the latest sunrise is 32 minutes later at 7:02 AM on August 31.
The latest sunset is 8:57 PM on August 1 and the earliest sunset is 45 minutes earlier at 8:13 PM on August 31.
Daylight saving time is observed in Jerome during 2020, but it neither starts nor ends during August, so the entire month is in daylight saving time.
For reference, on June 20, the longest day of the year, the Sun rises at 5:59 AM and sets 15 hours, 20 minutes later, at 9:19 PM, while on December 21, the shortest day of the year, it rises at 8:05 AM and sets 9 hours, 2 minutes later, at 5:07 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in Jerome is essentially constant during August, remaining around 0% throughout.
For reference, on July 19, the muggiest day of the year, there are muggy conditions 0% 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 August
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Jerome is essentially constant during August, remaining within 0.1 miles per hour of 7.2 miles per hour throughout.
For reference, on March 29, the windiest day of the year, the daily average wind speed is 9.2 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 7.2 miles per hour.
The lowest daily average wind speed during August is 7.2 miles per hour on August 10.
Average Wind Speed in August
The hourly average wind direction in Jerome throughout August is predominantly from the west, with a peak proportion of 55% on August 25.
Wind Direction in August
The growing season in Jerome typically lasts for 5.3 months (163 days), from around May 1 to around October 11, rarely starting before April 9 or after May 22, and rarely ending before September 21 or after November 1.
The month of August in Jerome is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in August
The average accumulated growing degree days in Jerome are rapidly increasing during August, increasing by 631°F, from 1,598°F to 2,228°F, over the course of the month.
Growing Degree Days in August
The average daily incident shortwave solar energy in Jerome is decreasing during August, falling by 1.2 kWh, from 7.6 kWh to 6.4 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in August
For the purposes of this report, the geographical coordinates of Jerome are 42.724 deg latitude, -114.519 deg longitude, and 3,737 ft elevation.
The topography within 2 miles of Jerome contains only modest variations in elevation, with a maximum elevation change of 299 feet and an average elevation above sea level of 3,749 feet. Within 10 miles contains only modest variations in elevation (1,309 feet). Within 50 miles contains very significant variations in elevation (5,587 feet).
The area within 2 miles of Jerome is covered by cropland (74%) and artificial surfaces (17%), within 10 miles by cropland (75%) and grassland (14%), and within 50 miles by shrubs (53%) and cropland (28%).
This report illustrates the typical weather in Jerome 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 Jerome.
For each station, the records are corrected for the elevation difference between that station and Jerome 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 Jerome is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Jerome and a given station.
The stations contributing to this reconstruction are: Jerome County Airport (81%, 5.1 kilometers, east); Twin Falls Airport (17%, 27 kilometers, south); and Mountain Home Air Force Base (2.2%, 116 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .