That said, you’ll note that where the 1970s gets situated in one’s calculations makes a large difference, since it was really cold. And one should ask one’s self: “what would I be saying if I was only looking to the data up to 1979?”, which further reenforces my initial point.

Also want to note that the first 3 years of the 1950s aren’t in the data set either!

However, I think looking at the data above it’s fairly clear that this June would not stand out of place in any decade previous except the 1970’s, and I’m fairly certain that May was unusually cool (though I haven’t downloaded the data and run the analysis.

30 :

[('2000-06', 32),
('1960-06', 29),
('1950-06', 25),
('1980-06', 24),
('1990-06', 23),
('1970-06', 12)]

Definitely more 30 days in the 2000s, especially since we have 2.5 more Junes to go.

32 :

[('1980-06', 9),
('1990-06', 9),
('1950-06', 8),
('1960-06', 8),
('2000-06', 8),
('1970-06', 3)]

But when we look at very hot, the trend is not so obvious (though it’s likely it will be the highest still).

Also note the super-cold ’70s.

http://www.climate.weatheroffice.ec.gc.ca/climateData/hourlydata_e.html

# of days, since 1954 (start of data series), where temperature met or exceed 30 degrees:

[('2005-06', 10),
('1963-06', 8),
('1988-06', 8),
('1959-06', 7),
('1964-06', 7),
('1957-06', 6),
('1991-06', 6),
('1956-06', 5),
('1983-06', 5),
('1987-06', 5),
('2001-06', 5),
('2002-06', 5),
('1994-06', 4),
('1998-06', 4),
('2003-06', 4),
('1954-06', 3),
('1955-06', 3),
('1969-06', 3),
('1970-06', 3),
('1971-06', 3),
('1976-06', 3),
('1995-06', 3),
('1999-06', 3),
('2006-06', 3),
('1961-06', 2),
('1965-06', 2),
('1966-06', 2),
('1967-06', 2),
('1968-06', 2),
('1981-06', 2),
('1984-06', 2),
('1997-06', 2),
('2004-06', 2),
('2007-06', 2),
('1958-06', 1),
('1962-06', 1),
('1973-06', 1),
('1975-06', 1),
('1978-06', 1),
('1980-06', 1),
('1986-06', 1),
('1992-06', 1),
('2000-06', 1)]

Jeez, I guess Drudge might be on to something. Let’s try 32 degrees:

[('1988-06', 5),
('1956-06', 4),
('1994-06', 3),
('2003-06', 3),
('2005-06', 3),
('1957-06', 2),
('1959-06', 2),
('1963-06', 2),
('1964-06', 2),
('1971-06', 2),
('1983-06', 2),
('1991-06', 2),
('1995-06', 2),
('1961-06', 1),
('1965-06', 1),
('1966-06', 1),
('1969-06', 1),
('1978-06', 1),
('1981-06', 1),
('1987-06', 1),
('1998-06', 1),
('1999-06', 1),
('2001-06', 1),
('2006-06', 1)]

33 or over:

[('1988-06', 3),
('2005-06', 3),
('1956-06', 2),
('1991-06', 2),
('1995-06', 2),
('2003-06', 2),
('1957-06', 1),
('1963-06', 1),
('1964-06', 1),
('1987-06', 1),
('1994-06', 1),
('2006-06', 1)]

If you see a pattern, please let us know. Data & program available if you want it.