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Warm Weather in May
Near-Record Warmth of May 2015 Mirrored February's Near-Record Cold

Cold, Raw Days of Late May

Grayday.newyork

 

A few weeks ago I published a post about warm weather in May.  Most of us are delighted to get an early start to summer, with days that have temperatures in the 80s and 90s, especially because they aren't usually accompanied by the humidity levels common in mid-summer.  Of course, most Mays have a few cool days in store to remind us that we're still transitioning from spring to summer (May 2015, warmest on record, was an exception).  And raw days in the latter part of May are especially cruel, with summer so close at hand.  This post focuses on these late, cold days.

 

Two dates that stand out on the list below are May 26, 1967 and May 27, 1961.  Both had highs only in the 40s, which is what the typical high is in the second week of March.  The high on May 26, 1967 was 46°, twenty-eight degrees below average; May 27, 1961's high of 47° was twenty-seven degrees below average.

 

One characteristic of chilly days in May is that high temperatures are often significantly more below average than low temperatures.  This is due largely to clouds and rain (and east-northeasterly winds).  Although a typical day in May has a 15-degree difference between its high and low, the chilly days listed below show diurnal variations that are often half that range (seven degrees or less).

 

Clipart_drizzle_cloud 

 

CHILLY DAYS IN LATE MAY (SINCE 1915)
(Sorted by Calendar Date)
        Below Average
Date High Low Mean Mean High
5.20.2000 51 46 48.5 -15 -20
5.20.1957 51 45 48.0 -16 -20
5.20.1952 54 50 52.0 -12 -17
5.21.1990 51 47 49.0 -15 -20
5.21.1929 50 45 47.5 -15 -20
5.21.1924 50 47 48.5 -14 -20
5.23.1982 55 51 53.0 -12 -18
5.24.1982 55 50 52.5 -12 -18
5.24.1927 51 49 50.0 -15 -21
5.25.2013 54 45 49.5 -16 -20
5.25.2005 53 48 50.5 -15 -21
5.25.1967 46 42 44.0 -21 -28
5.25.1934 56 49 52.5 -11 -16
5.25.1925 53 41 47.0 -17 -20
5.25.1921 52 47 49.5 -14 -22
5.26.1967 55 42 48.5 -17 -19
5.27.1961 47 41 44.0 -22 -27
5.28.1917 55 49 52.0 -14 -18
5.30.1953 56 50 53.0 -14 -19

 

 

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Benny R.

Little did you know that after the time this post was written, June 2015 would have had the chilliest June day in nearly 70 years (June 2nd, 2015) and also one of the chilliest June maximum temperatures on record (high of 55/low of 50, chilly enough to be added to this list). This came right after a May that had no highs chillier than 60 degrees. Guess you spoke too soon...

Rob

This post is about May, therefore no mention was made of cool days in June.

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