July Weather in Springfield Illinois, United StatesDaily high temperatures are around 86°F, rarely falling below 78°F or exceeding 93°F. The highest daily average high temperature is 86°F on July 19. Daily low temperatures are around 67°F, rarely falling below 58°F or exceeding 75°F. The highest daily average low temperature is 68°F on July 20. For reference, on July 19, the hottest day of the year, temperatures in Springfield typically range from 68°F to 86°F, while on January 22, the coldest day of the year, they range from 21°F to 35°F. 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. Osh, Kyrgyzstan (6,785 miles away) and Mungyeong, South Korea (6,644 miles) are the far-away foreign places with temperatures most similar to Springfield (view comparison). CloudsThe month of July in Springfield experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 37% to 32%. The clearest day of the month is July 28, with clear, mostly clear, or partly cloudy conditions 68% of the time. For reference, on February 9, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 56%, while on August 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Springfield, the chance of a wet day over the course of July is essentially constant, remaining around 33% throughout. For reference, the year's highest daily chance of a wet day is 39% on June 7, and its lowest chance is 15% on January 28. RainfallTo 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 Springfield is gradually decreasing, starting the month at 3.5 inches, when it rarely exceeds 6.5 inches or falls below 1.3 inches, and ending the month at 3.0 inches, when it rarely exceeds 5.2 inches or falls below 1.3 inches. SunOver the course of July in Springfield, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 41 minutes, implying an average daily decrease of 1 minute, 22 seconds, and weekly decrease of 9 minutes, 35 seconds. The shortest day of the month is July 31, with 14 hours, 15 minutes of daylight and the longest day is July 1, with 14 hours, 56 minutes of daylight. The earliest sunrise of the month in Springfield is 5:34 AM on July 1 and the latest sunrise is 23 minutes later at 5:57 AM on July 31. The latest sunset is 8:30 PM on July 1 and the earliest sunset is 18 minutes earlier at 8:12 PM on July 31. Daylight saving time is observed in Springfield during 2024, but it neither starts nor ends during July, so the entire month is in daylight saving time. For reference, on June 20, the longest day of the year, the Sun rises at 5:30 AM and sets 15 hours, 0 minutes later, at 8:30 PM, while on December 21, the shortest day of the year, it rises at 7:16 AM and sets 9 hours, 21 minutes later, at 4:37 PM. The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation. MoonThe figure below presents a compact representation of key lunar data for July 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
HumidityWe 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 Springfield is gradually increasing during July, rising from 56% to 61% over the course of the month. The highest chance of a muggy day during July is 64% on July 20. For reference, on July 20, the muggiest day of the year, there are muggy conditions 64% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time. WindThis 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 Springfield is gradually decreasing during July, decreasing from 7.9 miles per hour to 7.1 miles per hour over the course of the month. For reference, on March 31, the windiest day of the year, the daily average wind speed is 12.4 miles per hour, while on July 30, the calmest day of the year, the daily average wind speed is 7.1 miles per hour. The lowest daily average wind speed during July is 7.1 miles per hour on July 30. The hourly average wind direction in Springfield throughout July is predominantly from the south, with a peak proportion of 38% on July 2. Growing SeasonDefinitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere). The growing season in Springfield typically lasts for 6.3 months (193 days), from around April 10 to around October 20, rarely starting before March 25 or after April 27, and rarely ending before October 2 or after November 8. The month of July in Springfield is reliably fully within the growing season. Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F. The average accumulated growing degree days in Springfield are rapidly increasing during July, increasing by 772°F, from 1,483°F to 2,255°F, over the course of the month. Solar EnergyThis 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 Springfield is essentially constant during July, remaining within 0.1 kWh of 6.7 kWh throughout. The highest average daily incident shortwave solar energy during July is 6.9 kWh on July 1. TopographyFor the purposes of this report, the geographical coordinates of Springfield are 39.802 deg latitude, -89.644 deg longitude, and 597 ft elevation. The topography within 2 miles of Springfield is essentially flat, with a maximum elevation change of 85 feet and an average elevation above sea level of 593 feet. Within 10 miles is essentially flat (157 feet). Within 50 miles also contains only modest variations in elevation (371 feet). The area within 2 miles of Springfield is covered by artificial surfaces (100%), within 10 miles by cropland (62%) and artificial surfaces (19%), and within 50 miles by cropland (88%). Data SourcesThis report illustrates the typical weather in Springfield, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Springfield. For each station, the records are corrected for the elevation difference between that station and Springfield 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 Springfield is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Springfield and a given station. The stations contributing to this reconstruction are:
To get a sense of how much these sources agree with each other, you can view a comparison of Springfield and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data. Other DataAll data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com . Maps are © OpenStreetMap contributors. DisclaimerThe information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. Please review our full terms contained on our Terms of Service page. |