July 1
1992: The national meteorological service of New Zealand, known as the MetService, was established as a state-owned enterprise.
July 2
1997: A tornado outbreak struck the area around Detroit, Michigan, including the third tornado in 51 years to hit Windsor, Ontario.
July 3
1996: Tropical Storm Cristina made landfall near Puerto Ángel, the third tropical cyclone to strike southern Mexico in 10 days.
July 4
1999: A severe derecho produced 90 miles per hour (145 km/h) winds that downed 25 million trees in the Boundary Waters Canoe Area Wilderness of northeastern Minnesota.
July 5
1805: Robert FitzRoy, captain of the HMS Beagle and a pioneering British meteorologist, was born in Suffolk, England.
July 6
2013: Hurricane Erick reached peak intensity as it passed 100 miles (160 km) offshore of Lázaro Cárdenas, Michoacán, Mexico. Though the storm did not make landfall, flooding rains lead to the deaths of at least two people.
July 7
1991: A major derecho raced from South Dakota to New York, killing one person and causing over $100 million in damage.
July 8
1980: Aeroflot Flight 4225 crashed shortly after takeoff from Almaty International Airport in Soviet Kazakhstan due to turbulence caused by thermals during a heat wave, killing all 166 people on board.
July 9
1986: Typhoon Peggy made landfall in northern Luzon, Philippines, killing more than 300 people.
July 10
2009: A total of eleven bolts of lightning struck the launch pad of the Space Shuttle Endeavour, one of many delays which plagued shuttle mission STS-127.
July 11
1892: The Tête Rousse Glacier on the Mont Blanc massif unleashed an outburst flood of meltwater, killing at least 200 people in the valley near Saint-Gervais-les-Bains, France.
July 12
1996: Hurricane Bertha, an unusual early-season Atlantic hurricane, made landfall near Wilmington, North Carolina.
July 13
1951: The Great Flood of 1951 reached its peak at 2 million acres (8096 km²) flooded in Kansas and Missouri.
July 14
1987: Strong thunderstorms dropped more than 100 millimetres (3.9 in) of rain in less than three hours over the city of Montreal, causing flash flooding that killed two people.
July 15
2003: Hurricane Claudette came ashore near Port O'Connor, Texas, destroying more than 200 homes along the Gulf Coast.
July 16
1997: Hurricane Danny formed as Tropical Depression Four, eventually dropping 36.71 inches (932 mm) of rain on Dauphin Island, Alabama. This was the most rain ever recorded from a tropical cyclone in the state.
July 17
2006: An active period of derechos began across the Midwestern United States and eastern Canada, killing several people over 5 days.
July 18
1996: An F5 tornado struck the village of Oakfield, Wisconsin.
July 19
1996: Unprecedented rainfall started the Saguenay flood, killing at least seven people and causing as much as $1.5 billion (CAD) in damage in the Saguenay–Lac-Saint-Jean region of Quebec.
July 20
2008: Hurricane Bertha, the longest-lived July Atlantic hurricane on record, dissipated over Atlantic Canada.
July 21
1961: Hurricane Anna reached peak intensity over the Caribbean Sea, with peak winds of 115 miles per hour (185 km/h).
July 22
2006: Hurricane Daniel reached peak intensity over the open Pacific Ocean, with maximum sustained winds of 130 knots (150 mph; 240 km/h).
July 23
2010: The largest hailstone ever measured (by diameter) fell near Vivian, South Dakota. The hailstone was measured at 8.0 inches (20 cm) across.
July 24
1979: Tropical Storm Claudette made landfall near the Texas/Louisiana border, causing record rainfalls and $400 million dollars (1979 USD) in damage.
July 25
2001: A red rain was observed in the Indian state of Kerala. The phenomenon would continue sporadically for several weeks throughout the state. Its cause was never definitively determined.
July 26
2013: INSAT-3D, a weather and communications satellite built by the Indian Space Research Organisation, was launched into geostationary orbit.
July 27
1943: Colonel Joe Duckworth became the first man to fly into the eye of a tropical cyclone, taking his AT-6 Texan training plane into the 1943 Surprise Hurricane twice.
July 28
2005: A tornado, the costliest such storm in British history, struck Birmingham, United Kingdom.
July 29
1917: The temperature reached 114 °F (46 °C) in Beardsley, Minnesota, the highest recorded temperature in the state's history (later tied in 1936).
July 30
1960: Tropical Storm Brenda tracked along the coast of the Eastern United States, bringing flooding rains to several states.
July 31
2022: A volcano warning is accidentally issued for a wildfire in Scotts Bluff County, Nebraska.