Average Weather in July in Opelika Alabama, United States
In Opelika, the month of July is characterized by essentially constant daily high temperatures, with daily highs around 89°F throughout the month, rarely exceeding 95°F or dropping below 82°F. The highest daily average high temperature is 89°F on July 23.
Daily low temperatures are around 71°F, rarely falling below 66°F or exceeding 75°F. The highest daily average low temperature is 72°F on July 25.
For reference, on July 22, the hottest day of the year, temperatures in Opelika typically range from 72°F to 89°F, while on January 17, the coldest day of the year, they range from 38°F to 55°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 Opelika experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 46% throughout the month. The highest chance of overcast or mostly cloudy conditions is 48% on July 13.
The clearest day of the month is July 31, with clear, mostly clear, or partly cloudy conditions 56% of the time.
For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 52%, while on October 8, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.
Cloud Cover in July
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Opelika, the chance of a wet day over the course of July is essentially constant, remaining around 46% throughout.
For reference, the year's highest daily chance of a wet day is 48% on July 9, and its lowest chance is 18% on October 16.
Probability of Precipitation in July
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 July in Opelika is decreasing, starting the month at 3.8 inches, when it rarely exceeds 7.3 inches or falls below 1.7 inches, and ending the month at 3.2 inches, when it rarely exceeds 5.0 inches or falls below 1.5 inches.
The highest average 31-day accumulation is 3.8 inches on July 4.
Average Monthly Rainfall in July
Over the course of July in Opelika, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 31 minutes, implying an average daily decrease of 1 minute, 1 second, and weekly decrease of 7 minutes, 7 seconds.
The shortest day of the month is July 31, with 13 hours, 45 minutes of daylight and the longest day is July 1, with 14 hours, 16 minutes of daylight.
Hours of Daylight and Twilight in July
The earliest sunrise of the month in Opelika is 5:37 AM on July 1 and the latest sunrise is 18 minutes later at 5:55 AM on July 31.
The latest sunset is 7:53 PM on July 1 and the earliest sunset is 13 minutes earlier at 7:40 PM on July 31.
Daylight saving time is observed in Opelika during 2017, 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 5:34 AM and sets 14 hours, 18 minutes later, at 7:52 PM, while on December 21, the shortest day of the year, it rises at 6:39 AM and sets 10 hours, 0 minutes later, at 4:39 PM.
Sunrise & Sunset with Twilight in July
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The chance that a given day will be muggy in Opelika is increasing during July, rising from 79% to 88% over the course of the month.
The highest chance of a muggy day during July is 89% on July 25.
For reference, on July 24, the muggiest day of the year, there are muggy conditions 89% of the time, while on January 17, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in July
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Opelika is essentially constant during July, remaining within 0.1 miles per hour of 1.8 miles per hour throughout.
For reference, on March 8, the windiest day of the year, the daily average wind speed is 2.7 miles per hour, while on August 8, the calmest day of the year, the daily average wind speed is 1.7 miles per hour.
Average Wind Speed in July
Wind Direction in July
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Opelika is essentially constant during July, remaining within 0.1 kWh of 6.3 kWh throughout.
Average Daily Incident Shortwave Solar Energy in July
For the purposes of this report, the geographical coordinates of Opelika are 32.645 deg latitude, -85.378 deg longitude, and 755 ft elevation.
The topography within 2 miles of Opelika contains only modest variations in elevation, with a maximum elevation change of 194 feet and an average elevation above sea level of 761 feet. Within 10 miles contains only modest variations in elevation (610 feet). Within 50 miles contains significant variations in elevation (1,394 feet).
The area within 2 miles of Opelika is covered by artificial surfaces (70%) and trees (27%), within 10 miles by trees (76%) and cropland (12%), and within 50 miles by trees (82%) and cropland (11%).
This report illustrates the typical weather in Opelika 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 Opelika.
For each station, the records are corrected for the elevation difference between that station and Opelika 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 Opelika is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Opelika and a given station.
The stations contributing to this reconstruction are: Auburn-Opelika Robert G Pitts Airport (92%, 6 kilometers, southwest); Columbus Airport (4.6%, 43 kilometers, east); and La Grange, Callaway Airport (3.8%, 51 kilometers, northeast).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.