308 H. Gibbons on the Climate of San Francisco for 18565. 
noons of sixteen other days windy. Land winds 16 per cent, 
sea winds 84. The temperature of the month was about the 
usual standard for May, though the extreme of 83° was uncom- 
mon. Slight frosts occurred on several mornings. The general 
range of the thermometer at sunrise was from 46° to 54°, and 
at noon from 62° to 68°. May is the transition month from the 
rainy season to that of permanent drought. A few light rains 
enerally occur, but the quantity in 1855 was far beyond the or- 
dinary supply. Nearly 14 inches fell on the 14th and four-tenths 
on the 19th and 20th, after which there was no more till Autumn. 
rometric means ; sunrise 29°835 in.—Y a. m. 29°840,—noon 
‘29-832,—-10 p. m. 29°830. Extremes, 30-05 and 29°67. 
June.—Mean temperature at sunrise 52°-00, 9 4. m. 61°20, 
noon 67°-87, 10 p. m. 549-40. Mean of extremes 59°-93. Maxi- 
mum §2°, minimum 49°; range 33°. Warmest morning 57°, 
coldest noon 62°. Proportion of clear sky 87 per cent, of cloudy 
i ist on | 
13. Whole days clear nineteen, cloudy 0. No rain. 
ten mornings and six evenings. Wind SE and S two days, SW 
one day, West twenty-seven days. On twenty-two days the after- 
noons were windy, and on six of these the wind was high. On the 
11th, 12th and 13th rains fell in the interior and northern counties. 
There was a very large proportion of fair weather and cloudless 
sky. The temperature observed the ordinary range for June, 
varying mostly from 50° to 54° at sunrise and from 63° to 70° 
at noon. Land winds 2 per cent, sea winds 98 per cent, orin . 
other words there was almost no land wind. 
Barometric means: sunrise 29-701 in., 9 a. mu. 29°709, noon 
29'706, 10 vp. um. 29.695. Extremes 29-98 and 29-57. 
of sea winds 98 per cent. Windy afternoons twenty-four, 
which three high winds. The general range of temperature at 
night was from 53° to 58°, and at noon from 62° to 70°. On 
one day, the 7th, it reached the extraordinary height of 90°. 
The warmest ‘day next to this was 77°. There were but five 
days in all the month when the mercury rose as high as 702 at 
noon. 
Barometric means for July: sunrise 29-738 in., 9 a.m. 29°750, 
noon 29:747, 10 ep. m. 29-734. Extremes 29:86 and 29°59. 
_ August.—Mean temperature at suntise 55°°32, at 9 a. M. 630-23, 
at noon 69°-61, at 10 p.m. 57-77. Mean of extremes 6° wor 
Maximum 79°, minimum 53°; range 26°, Warmest * morning 
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