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11
being 21 lb. per square foot. A notably mild winter, giving the
highest mean temperature over the period December-February
since 1868-69, was followed by the coldest May since 1902. The
minimum of 28.2 deg. registered on 17th May was the lowest for
this month since 1877, and was 3.4 deg. lower than any hitherto
reached on any date between 15th May and 26th September since
records were begun in 1841.
The Summer.
The summer, though a short one, was markedly hot, for the
third year in succession. From June to August the mean temperature
was 64.6 deg.—2.4 deg. above normal. Only four times
during the last seventy-five years has so high a value been recorded
for the same three months: 65.9 deg. in 1868 and 1911, 65.6 deg.
in 1933, and 64.7 deg. in 1899. Snow or sleet occurred on sixteen
days during 1935, hail on five days, and thunderstorms on thirteen
days, six of which were in June. There was no measurable rain
from 21st July to 11th August, this period of twenty-two days
constituting an "absolute drought" of unusual length, it is
noteworthy that 1935 is the fourth consecutive year to give an
extreme maximum temperature in excess of 90 deg., and the
sixth consecutive year in which the extreme minimum has not been
below 20 deg. Both of these events are unique in the ninety-five
years covered by the lloyal Observatory records.