Average Weather in August in Rockford Michigan, United States
In Rockford, the month of August is characterized by gradually falling daily high temperatures, with daily highs decreasing by 4°F, from 81°F to 77°F over the course of the month, and rarely exceeding 89°F or dropping below 68°F.
Daily low temperatures decrease by 4°F, from 61°F to 57°F, rarely falling below 47°F or exceeding 71°F.
For reference, on July 19, the hottest day of the year, temperatures in Rockford typically range from 62°F to 82°F, while on January 29, the coldest day of the year, they range from 17°F to 29°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 Rockford experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 33% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 33% on August 23.
The clearest day of the month is August 23, with clear, mostly clear, or partly cloudy conditions 67% of the time.
For reference, on January 8, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 69%, while on August 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.
Cloud Cover in August
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Rockford, the chance of a wet day over the course of August is essentially constant, remaining around 31% throughout.
For reference, the year's highest daily chance of a wet day is 33% on June 13, and its lowest chance is 18% on February 4.
Probability of Precipitation in August
The average sliding 31-day rainfall during August in Rockford is essentially constant, remaining about 3.0 inches throughout, and rarely exceeding 5.1 inches or falling below 1.2 inches.
Average Monthly Rainfall in August
Over the course of August in Rockford, 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, 18 minutes, implying an average daily decrease of 2 minutes, 35 seconds, and weekly decrease of 18 minutes, 8 seconds.
The shortest day of the month is August 31, with 13 hours, 13 minutes of daylight and the longest day is August 1, with 14 hours, 30 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Rockford is 6:33 AM on August 1 and the latest sunrise is 33 minutes later at 7:05 AM on August 31.
The latest sunset is 9:03 PM on August 1 and the earliest sunset is 45 minutes earlier at 8:18 PM on August 31.
Daylight saving time is observed in Rockford during 2017, but it neither starts nor ends during August, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:02 AM and sets 15 hours, 23 minutes later, at 9:25 PM, while on December 21, the shortest day of the year, it rises at 8:10 AM and sets 8 hours, 59 minutes later, at 5:10 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in Rockford is rapidly decreasing during August, falling from 33% to 21% over the course of the month.
For reference, on July 28, the muggiest day of the year, there are muggy conditions 33% 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
The average hourly wind speed in Rockford is essentially constant during August, remaining within 0.2 miles per hour of 4.3 miles per hour throughout.
For reference, on January 12, the windiest day of the year, the daily average wind speed is 6.6 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 4.2 miles per hour.
The lowest daily average wind speed during August is 4.2 miles per hour on August 3.
Average Wind Speed in August
Wind Direction in August
Rockford is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Rockford is essentially constant during August, remaining within 1°F of 70°F throughout.
The highest average surface water temperature during August is 71°F on August 14.
Average Water Temperature in August
The average daily incident shortwave solar energy in Rockford is gradually decreasing during August, falling by 1.0 kWh, from 6.5 kWh to 5.5 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 Rockford are 43.120 deg latitude, -85.560 deg longitude, and 807 ft elevation.
The topography within 2 miles of Rockford contains only modest variations in elevation, with a maximum elevation change of 276 feet and an average elevation above sea level of 790 feet. Within 10 miles also contains only modest variations in elevation (423 feet). Within 50 miles contains only modest variations in elevation (787 feet).
The area within 2 miles of Rockford is covered by trees (53%), artificial surfaces (35%), and cropland (12%), within 10 miles by cropland (41%) and trees (37%), and within 50 miles by cropland (49%) and trees (32%).
This report illustrates the typical weather in Rockford 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 Rockford.
For each station, the records are corrected for the elevation difference between that station and Rockford 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 Rockford is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Rockford and a given station.
The stations contributing to this reconstruction are: Gerald R. Ford International Airport (46%, 27 kilometers, south); Fremont Municipal Airport (18%, 50 kilometers, northwest); Muskegon County Airport (15%, 55 kilometers, west); Roben-Hood Airport (11%, 67 kilometers, north); and Gratiot Community Airport (10%, 74 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .