- Jul 1 AVRO radio broadcast studios in Hilversum opens
- Jul 1 Watchfulness Committee forms in Amsterdam
Perry Wins Third Wimbledon
Jul 3 Wimbledon Men's Tennis: Home favourite Fred Perry beats Gottfried von Cramm of Germany 6-1, 6-1, 6-0 for his third straight Wimbledon singles title
- Jul 4 League of Nations ends sanctions against Italy after Italian takeover of Abyssinia
Wimbledon Women's Championship
Jul 4 Wimbledon Women's Tennis: American Helen Jacobs wins her only Wimbledon title beating Hilde Krahwinkel Sperling 6-2, 4-6, 7-5
- Jul 5 120°F (49°C), Gannvalley, South Dakota (state record)
- Jul 6 114°F (46°C), Moorhead, Minnesota (state record)
- Jul 6 121°F (49°C), Steele, North Dakota (state record)
- Jul 6 A major breach of the Manchester, Bolton and Bury Canal in England sends millions of gallons of water cascading 200 feet into the River Irwell
- Jul 7 4th MLB All Star Game, Braves Field, Boston: After losing the first 3 AS Games, NL wins 4-3, 4 different Cubs players score the runs
- Jul 7 American businessman Henry F. Phillips receives patents for a new "cross-recessed" screw, and the new screwdriver needed to make it work
- Jul 7 RCA shows 1st real TV program (dancing, film on locomotives, Bonwit Teller fashion show and monologue from Tobacco Road & comedy)
- Jul 10 109°F (43°C) Cumberland & Frederick, Maryland (state record)
- Jul 10 110°F (43°C) at Runyon, New Jersey (state record)
- Jul 10 111°F (44°C) Phoenixville, Pennsylvania (state record)
- Jul 10 112°F (44°C) at Martinsburg, West Virginia (state record)
- Jul 10 New Straits Convention allows Turkish re-armament of Dardanelles
Baseball Record
Jul 10 Phillies Chuck Klein becomes 4th to hit 4 HRs in a game
- Jul 11 Triborough Bridge linking Manhattan, Bronx and Queens opens
- Jul 13 112°F (44°C), Mio, Michigan (state record)
- Jul 13 114°F (46°C), Wisconsin Dells, Wisconsin (state record)
- Jul 14 1 million demonstrate to support French People's Front government
- Jul 14 116°F (47°C), Collegeville, Indiana (state record)
- Jul 15 Dutch 2nd Chamber agree to temporarily increase defense budget
- Jul 16 1st x-ray photo of arterial circulation, Rochester, NY
- Jul 16 NY Giants are 10½ games back in NL, & go on to win pennant
Hubbell Begins Winning Streak
Jul 17 NY Giants future Baseball Hall of Fame pitcher Carl Hubbell begins MLB record 24 game winning streak, beating Pittsburgh Pirates, 6-0 at Forbes Field
Spanish Civil War Begins
Jul 17 Spanish generals Francisco Franco and Emilio Mola lead a right-wing uprising, starting the Spanish Civil War
Lucky Luciano Sentenced
Jul 18 Charles "Lucky" Luciano is sentenced to 30 to 50 years in state prison
- Jul 18 Spanish Civil War: General Francisco Franco issues manifesto and leads an uprising in the Spanish army stationed in Morocco
Feller Makes Debut
Jul 19 17-year-old Cleveland Indians future Baseball HOF pitcher Bob Feller makes his MLB debut in relief in 9-5 loss to Senators at Griffith Stadium, Washington
- Jul 19 Spanish premier Casares Quiroga succeeded by Jose Giral
- Jul 22 Philadelphia Phillies outfielder Johnny Moore hits 3 straight home runs in a 16-4 rout of the Pittsburgh Pirates
- Jul 24 118°F (48°C), Minden, Nebraska (state record)
- Jul 24 121°F (49°C), near Alton, Kansas (state record)
- Jul 24 Generals Mola and Cabanellas form Spanish anti-government
- Jul 25 115 acre Orchard Beach opens in the Bronx
- Jul 26 The Axis Powers decide to intervene in the Spanish Civil War.
- Jul 28 International Lawn Tennis Challenge, Wimbledon: 4 straight titles for GB as Fred Perry beats Australian Jack Crawford 6-2, 6-3, 6-3 for a 3-2 victory
- Jul 31 IOC awards Tokyo, Japan 1940 Summer Olympic Games (later cancelled, Second Sino-Japanese War)
Authors
Dictators
Explorers
Outlaws
Queens
Spies