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Data source: NOAA National Climate Data Center
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Hot days in Chicago correlates with...

VariableCorrelationYearsSys. Score
Air pollution in Carbondale, Illinoisr=0.966yrs334
How geeky Simone Giertz's YouTube video titles arer=0.869yrs265
How cool PBS Space Time YouTube video titles arer=0.858yrs262
How trendy Steve Mould's YouTube video titles arer=0.8113yrs172
Air pollution in Peoria, Illinoisr=0.7615yrs163
Popularity of the 'McKayla Maroney' memer=0.859yrs160
Air pollution in Peoria, Illinoisr=0.5837yrs158
Popularity of the 'trollface' memer=0.6817yrs142
Solar power generated in Guinea-Bissaur=0.768yrs140
Solar power generated in Azerbaijanr=0.739yrs136
Popularity of the 'call me maybe' memer=0.6711yrs135
Number of edits to the Wikipedia article for Taylor Swiftr=0.6417yrs134
Solar power generated in Chiler=0.719yrs133
The number of movies Emily Blunt appeared inr=0.6117yrs132
How cool Simone Giertz's YouTube video titles arer=0.849yrs127
Global sales revenue of elevators and escalatorsr=0.747yrs126
Air pollution in Springfield, Illinoisr=0.5834yrs125
Number of times 16 was a winning Mega Millions numberr=0.5917yrs124
Associates degrees awarded in Architecturer=0.6411yrs124
The number of movies Lupita Nyong'o appeared inr=0.5912yrs124
Customer satisfaction with Acer computersr=0.6114yrs123
Number of edits to the Wikipedia article for data dredgingr=0.5519yrs122
Global revenue from elevator and escalator salesr=0.747yrs121
xkcd comics published about researchr=0.5515yrs120
The number of movies Ingrid Bergman appeared inr=0.4725yrs119
Air pollution in Chicagor=0.5141yrs114
How clickbait-y Matt Parker's YouTube video titles arer=0.812yrs114
Customer satisfaction with HPr=0.4628yrs114
The number of building inspectors in Illinoisr=0.520yrs111
Google searches for 'no siri'r=0.5116yrs110
The number of pest control workers in Illinoisr=0.4920yrs110
US average dairy skim-solid content of bulk evaporated and condensed milkr=0.4822yrs107
Michael Schumacher's Formula One Rankingr=0.5117yrs106
Chunghwa Telecom Co.'s stock price (CHT)r=0.4719yrs106
The number of foresters in Illinoisr=0.4720yrs106
Popularity of the 'willy wonka' memer=0.6317yrs105
Patents granted to Amazonr=0.69yrs105
How good Simone Giertz's YouTube video titles arer=0.819yrs102
Master's degrees awarded in Educationr=0.5510yrs102
Air pollution in Carbondale, Illinoisr=0.846yrs101
Associates degrees awarded in consumer sciencesr=0.5511yrs101
Solar power generated in Bosnia and Herzegovinar=0.699yrs100
Total sales of commercial vehicles in Chinar=0.67yrs100
Google searches for 'Gangnam Style'r=0.5411yrs100
Google searches for 'Titanic'r=0.4915yrs96
Customer satisfaction with Sprintr=0.4817yrs96
How insightful Simone Giertz's YouTube video titles arer=0.89yrs91
Solar power generated in Mauritaniar=0.699yrs90
Popularity of the 'gangnam style' memer=0.6311yrs89
Number of Scooby Doo direct-to-video films releasedr=0.4824yrs88
Air pollution in Champaign, Illinoisr=0.7515yrs86
How geeky Matt Parker's YouTube video titles arer=0.7812yrs81
Solar power generated in Ghanar=0.679yrs77
The number of movies Jessica Biel appeared inr=0.4821yrs76
Popularity of the 'trollface' memer=0.5617yrs75
The number of audiologists in Illinoisr=0.4620yrs75
How good OverSimplified YouTube video titles arer=0.817yrs70
Solar power generated in Kuwaitr=0.679yrs67
Google searches for 'who is elon musk'r=0.4915yrs66
Air quality in Peoria, Illinoisr=-0.5842yrs64
Popularity of the 'bad luck brian' memer=0.5713yrs62
Total length of Deep Look YouTube videosr=0.799yrs60
Wind power generated in Panamar=0.679yrs57
The number of movies Margot Robbie appeared inr=0.5412yrs56
Air quality in Springfield, Illinoisr=-0.5742yrs53
Popularity of the 'overly attached girlfriend' memer=0.5515yrs51
How clickbait-y MrBeast's YouTube video titles arer=0.7511yrs46
Air pollution in Rockford, Illinoisr=0.5137yrs42
Biomass power generated in Malaysiar=0.613yrs40
Popularity of the 'y u no' memer=0.5116yrs36
How provocative Simone Giertz's YouTube video titles arer=0.759yrs34
Air pollution in Effingham, Illinoisr=0.5232yrs29
Solar power generated in Moldovar=0.698yrs29
How fun MrBeast's YouTube video titles arer=0.7411yrs24
Popularity of the 'scumbag steve' memer=0.4917yrs24
Air pollution in Decatur, Illinoisr=0.5132yrs18
Biomass power generated in Angolar=0.688yrs18
Popularity of the 'success kid' memer=0.4917yrs14
How 'hip and with it' Simone Giertz's YouTube video titles arer=0.749yrs12
Air pollution in Rockford, Illinoisr=0.6216yrs8
Solar power generated in Turkiyer=0.678yrs6
How nerdy Simone Giertz's YouTube video titles arer=0.79yrs-4
Wind power generated in Bangladeshr=0.659yrs-6
Air pollution in Springfield, Illinoisr=0.5719yrs-7
Popularity of the 'one does not simply' memer=0.4916yrs-7
Average length of 'Be Smart' science YouTube videosr=0.6910yrs-14
Solar power generated in Iraqr=0.639yrs-19
Popularity of the 'bazinga' memer=0.4617yrs-20
How trendy MrBeast's YouTube video titles arer=0.6811yrs-25
Air quality in Decatur, Illinoisr=-0.5442yrs-30
Solar power generated in Belarusr=0.638yrs-30
The average number of likes on 'Be Smart' science YouTube videosr=0.6810yrs-36
Wind power generated in Moldovar=0.629yrs-40
How clickbait-y Simone Giertz's YouTube video titles arer=0.689yrs-47
Air quality in Carbondale, Illinoisr=-0.966yrs-49
Biomass power generated in Laosr=0.619yrs-52
How fun Steve Mould's YouTube video titles arer=0.6513yrs-58
Air pollution in Effingham, Illinoisr=0.4717yrs-64
Solar power generated in Omanr=0.599yrs-65
Biomass power generated in Kazakhstanr=0.589yrs-76
Wind power generated in Sloveniar=0.589yrs-86


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You caught me! While it would be intuitive to sort only by "correlation," I have a big, weird database. If I sort only by correlation, often all the top results are from some one or two very large datasets (like the weather or labor statistics), and it overwhelms the page.

I can't show you *all* the correlations, because my database would get too large and this page would take a very long time to load. Instead I opt to show you a subset, and I sort them by a magic system score. It starts with the correlation, but penalizes variables that repeat from the same dataset. (It also gives a bonus to variables I happen to find interesting.)
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