Note: Clicking on the floating-bar charts a second time after they appear on the screen will enlarge them even further). they are deliberately adjoined with no spaces in-between. The bars depict the varying diurnal, synoptic, long-wave, and seasonal influences on temperature over time, and to create an enhanced sort of “signature” appearance. Superimposed are two line traces, the upper one connecting 1872 to present average daily maxima, the lower one 1872 to present average daily minima. Each bar represents an individual day’s temperature range. The top chart on a given yearly page (links below) displays “floating-bars” of the daily maxima and minima. K-Means Cluster Analysis of Diurnal Resultant Wind Patterns for Chicago O’Hare.Chicago Mean and Extreme Lowest 1st Percentile Hourly Relative Humidities.Chicago Coldest 99th Percentile Hour/Month Wind Chill Temps.Chicago Hourly Temperatures, by Hour/Month - Means, Stdv’s & Skews.Chicago Mean Hourly Temperatures & Upper 99th and Lower 1st Percentile Temps by Month/Hour.Chicago Annual Precipitation Histograms (1871-2019).Chicago Annual Precipitation History (1871-2022).Boxplot of Chicago Calendar Month Precipitation Distributions.Chicago Coldest Wind Chill Temperatures by Calendar Year (1947-2023) New ().Chicago Warmest Heat-Index Temperatures by Calendar Year (1947-2023) New (9/4/23).Chicago Annual Mean Temperature History (1873-2022). Chicago Average Daily Temperature Ranges, by Calendar Day.Normals, Record Wet 2008/Dry 1962, and Record Wettest YTD New (10/2/23)Ģ021 Daily Temperatures and Precipitation for ChicagoĢ020 Daily Temperatures and Precipitation for ChicagoĢ019 Daily Temperatures and Precipitation for ChicagoĢ018 Daily Temperatures and Precipitation for ChicagoĢ017 Daily Temperatures and Precipitation for Chicago Last Update: e-mail contact: Climate Overview GraphsĢ023 Daily Temperatures and Precipitation for Chicago New (10/2/23)Ģ022 Daily Temperatures and Precipitation for ChicagoĬhicago 2023 Cumulative Daily Precipitation vs. The data thus reflect observations made at multiple sites and exposures (for example, heights of the thermometers above ground-level) over the years, so interpretations and comparisons should be taken in this light. On the latter date the official site transferred to Midway Airport, and on 16 January 1980 it moved to O’Hare International Airport, where it remains today (several within-site moves have been made at O’Hare). Court House, and from January 1926 through 20 June 1942 at the University of Chicago. “Official” observations from 1871 through June 1905 were taken at a number of sites in the downtown area, those from July 1905 through 1925 at the U. The daily precipitation observations date from the start of 1871, temperatures from 10 June 1872, snowfall from the 1885-6 season, and snow depth from the beginning of 1901.ĭata were obtained courtesy of the Chicago National Weather Service Office, the National Climatic Data Center, and the Chicago National Weather Service Office’s on-line site: The graphics consist of summary overview charts followed by year-to-year graphs that depict daily temperature, precipitation, and snowfall. The following is a graphical climatology of Chicago, Illinois temperatures, precipitation, and snowfall, from the 1870’s at the earliest (temperature and precipitation) into 2023. Graphical Climatology of Chicago Temperatures, Precipitation, and Snowfall (1871-Present)
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