Observations made at San Diego City, compiled from Report Of the Chief Signal Officer of the U. S. Army.

[Transcriber's note: Table has been modified from original to fit, using a legend.]

Column headers:
a = Average number of cloudy 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
May10.9 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 49.5101.0 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 annual87.4155.1122.7 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.

Jan. Feb. March. April.May.June.
Locality of Station c a b a b a b a b a b a b
Charleston, S. C. 12 80 23 78 26 85 28 87 32 94 47 94 65
Denver, Col. 12 67*29 72*22 81*10 83 4 92 27 89 50
Jacksonville, Fla. 12 80 24 83 32 88 31 91 37 99 48101 62
L'S ANG'LES, CAL. 6 82 30 86 28 99 34 94 39100 40104 47
New Orleans, La. 13 78 20 80 33 84 37 86 38 92 56 97 65
Newport, R. I. 2 48 2 50 4 60 4 62 26 75 33 91 41
New York 13 64 *6 69 *4 72 *3 81 20 94 34 95 47
Pensacola, Fla. 4 74 29 78 31 79 36 87 34 93 47 97 64
SAN DIEGO, CAL. 12 78 32 83 35 99 38 87 39 94 45 94 51
San Francisco, Cal. 12 69 36 71 35 77 39 81 40 86 45 95 48