- Jun 1 -27°F (-33°C), Sarmiento, Argentina (South American record)
- Jun 3 Centro Escolar University is established by Librada Avelino and Carmen de Luna in Manila, Philippines
- Jun 10 France and Japan sign an agreement to maintain the independence and integrity of China, equality for all nations in trading with China, and the status quo in the Far East
- Jun 11 George Dennett, aided by Gilbert Jessop, dismisses Northamptonshire for 12 runs, the lowest total in first-class cricket
- Jun 11 Northants all out for 12 v Gloucestershire
- Jun 12 Yanks commit 11 errors & lose 14-6 to Tigers
- Jun 13 Lowest temperature ever in 48 US states for June, 2°F in Tamarack, California
- Jun 14 Government of Transvaal sends home 50,000 Chinese day workers
- Jun 14 Norway adopts female suffrage for middle class women only in parliamentary elections
Typhoid Mary Identified
Jun 15 Researcher George Soper publishes the results of his investigation into recent typhoid outbreaks in the New York area and announces that Mary Mallon [Typhoid Mary] is the likely source of the outbreak
- Jun 15 The 2nd Hague Peace Conference meets in an attempt to stop the arms race; Germany resists, but conference does make important rules around the rights of neutral powers
Nicolas II Dissolves Second Duma
Jun 16 Tsar Nicolas II of Russia dissolves the Second Duma (parliament) and issues an edict that will increase representation of propertied classes while reducing that of peasants, workers and national minorities
- Jun 20 1st Portland Rose festival held in Portland, Oregon
- Jun 21 British Open Men's Golf, Royal Liverpool GC: Frenchman Arnaud Massy wins by 2 strokes from J.H. Taylor; first non-Briton to win Open Championship
- Jun 21 E. W. Scripps founds United Press Associations in the US
- Jun 21 US Open Men's Golf, Philadelphia Cricket Club: Alec Ross of Scotland posts 4 sub-80 rounds to win his only major title, 2 strokes ahead of runner-up Gilbert Nicholls
- Jun 26 Bolsheviks overthrows transport in Tiflis
Senators' Record Steal
Jun 28 MLB Washington Senators steal a record 13 bases off of New York Highlanders catcher Branch Rickey
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