days for each month and year.
b = Average number of fair days for each month and year.
c = Average number of clear days for each month and year.
d = Average cloudiness, scale 0 to 10, for each month and year.
e = Average hourly velocity of wind for each month and year.
f = Average precipitation for each month and year.
g = Minimum temperature for each month and year.
h = Maximum temperature for each month and year.
i = Mean temperature for each month and year.
j = Mean normal barometer of San Diego for each month and year for four years.

------------------------------------------------------------------------------
| OBSERVATIONS EXTENDING OVER A PERIOD OF TWELVE YEARS.
MONTH. | a | b | c | d | e f | g | h | i | j
---------+------------------------------------------------------------+-------
January | 8.5 | 11.2 | 11.3 | 4.1 | 5.1 | 1.85 | 32.0 | 78.0 | 53.6 | 30.027
February | 7.9 | 11.3 | 9.0 | 4.4 | 6.0 | 2.07 | 35.0 | 82.6 | 54.3 | 30.058
March | 9.6.| 12.7 | 8.7 | 4.8 | 6.4 | 0.97 | 38.0 | 99.0 | 55.7 | 30.004
April | 7.9 | 11.9 | 10.2 | 4.4 | 6.6 | 0.68 | 39.0 | 87.0 | 57.7 | 29.965
May |10.9 | 12.1 | 8.0 | 5.2 | 6.7 | 0.26 | 45.4 | 94.0 | 61.0 | 29.893
June | 8.1.| 15.2 | 6.7 | 5.0 | 6.3 | 0.05 | 51.0 | 94.0 | 64.4 | 29.864
July | 6.7 | 16.1 | 8.2 | 4.7 | 6.3 | 0.02 | 54.0 | 86.0 | 67.1 | 29.849
August | 4.7 | 16.9 | 9.4 | 4.1 | 6.0 | 0.23 | 54.0 | 86.0 | 68.7 | 29.894
September| 4.4 | 13.9 | 11.7 | 3.7 | 5.9 | 0.05 | 49.5 |101.0 | 66.8 | 29.840
October | 5.6 | 12.6 | 12.8 | 3.9 | 5.4 | 0.49 | 44.0 | 92.0 | 62.9 | 29.905
November | 6.5 | 10.0 | 13.5 | 3.6 | 5.1 | 0.70 | 38.0 | 85.0 | 58.3 | 29.991
December | 6.6 | 11.2 | 13.2 | 3.7 | 5.1 | 2.12 | 32.0 | 82.0 | 55.6 | 30.009
Mean | | | | | | | | | |
annual |87.4 |155.1 |122.7 | 4.3 | 5.9.| 9.49 | 42.6 | 88.8 | 60.5 | 29.942
------------------------------------------------------------------------------

EXTREMES OF HEAT AND COLD.

The following table, taken from the Report of the Chief Signal Officer,
shows the highest and lowest temperatures recorded since the opening of
stations of the Signal Service at the points named, for the number of
years indicated. An asterisk (*) denotes below zero:

a = Maximum
b = Minimum
c = Number of Years of Observation.

-------------------------------------------------------------------------