"كتيّب سوريا (بما في ذلك فلسطين). لندن: إدارة استخبارات الأركان البحرية، يونيو ١٩١٩" [ظ‎‎٢‎٢] (٧٣٨/٤٩)

40
CLIMATE
Air Pressure (at 32° F.).—The highest reading during
the period 1882-1901 (inclusive) was 27-795 in. in January
1898, the lowest reading was 26-860 in. in March 1898. The
mean of highest readings for the period was 27-525 in. and
the mean of lowest readings 27-208 in. The greatest number
of highest readings occurred in January, of lowest readings
in July. The greatest monthly range was 0-730 in. in January
1887, the least, in July 1900, 0-094 in. The greatest monthly
range was observed 7 times in January, the least, 8 times in
July. The highest monthly mean reading in the 20 years
was 27-558 in., in December 1891 ; the least monthly mean
reading 27-217 in. in July 1889.
Temperature .—The highest temperature observed in each
year from 1882 to 1901 varied between 97° F. and 108° F.
(June 18, 1894). In the same period, the maximum tem
perature for the year occurred eight times in August,
five times in June, four times in September, once in July,
once both in June and August, and once both in June and
September. The maximum temperature reached, or exceeded, 1
100° F. in 9 years out of the twenty, while the total number
of days recording this high temperature was 25, of which
7 occurred in 1888. The temperature reached, or exceeded,
90° F. on an aggregate of 676 days in the twenty years, 1887
having the maximum of 73 days, and 1898 the minimum of
12 days ; the average per year was 33-8 days. The earliest
and latest days in the year on which the temperature was
as high as 90° were March 25, 1888, and October 23, in both
1887 and 1898. The lowest temperatures observed annually
varied between 25° F. (observed on January 31, 1897 and
January 1, 1898) and 36° F.
The minimum temperature of the year has occurred
10 times in January, 4 times in December, twice in March,
one year it occurred in each of the months January, February,
March, and December, one year in both January and De
cember, and one year in both February and December. The
minimum temperature fell as low as or below 30° F. in 14
out of the 20 years, the total number of days of this low