80 1899 70 72 66 74 74 72 70 65 76 69 65 69 68 67 72 70 78 68 78 1899 24 24 32 35 33 1878. 1879.. 1880. 1881. 1882. 1883. 1884. 1885. 1886. 1887. 1888. 1889. 1890. 1891. 1892. 1893. 1894. 1895. 1896. 1897. 1898. 1899. 1900. ...... Year. Absolute maximum and year 1878. 1879. 1880. 1881. 1882. 1883. 1884. 1885. 1886. 1887. 1888. 1889... 1890. 1891 1892. 1893.. 1894. 1895. 1896. 1897. 1898. 1899. 1900. Absolute minimum and year.. MAXIMUM TEMPERATURES (DEGREES FAHRENHEIT). Jan. Feb. Mar. 1888 a 1882 Apr. May. June. July. Aug. Sept. Oct. Nov. 30 1880 a Also other years. MINIMUM TEMPERATURES (DEGREES FAHRENHEIT). 37 1886 a Also other years. 1886 40 36 a 1881 1874. 1875. 1876. 1877. 1878. 1879. 1880. 1881. 1882. 1883.. 1884. 1885.. 1886. 1887. 1888. 1889. 1890. 1891. 1892. 1893. 1894.. 1895. 1896. 1897. 1898. 1899. 1900. [Data from records of Southern Pacific Railway Company.] San Mateo is situated in latitude 37° 34′ north, longitude 122° 19' west, about 14 miles in an air line south and slightly east of San Francisco. By railroad the distance is about 22 miles. The elevation is about 22 feet above sea level. To the north and east, at a distance of about 1 mile, are the waters of San Francisco Bay, while to the west, stretching northwest to southeast, are the hills of the Buriburi ridge, with elevations varying from 200 to 600 feet. The mean annual temperature, based upon records covering a period of twenty-seven years, from 1874 to 1900, inclusive, is 57.6°, which, it is interesting to notice, is almost that of Menlo Park, 57.7°, and practically the same as that of San Jose. The coldest month is January, with a mean temperature of 47.9, and the warmest is July, 65.4. It will be noticed that July is 2.3° cooler than at Menlo Park, and 1.3 cooler than at San Jose, but 6.6 warmer than at San Francisco. The highest temperature recorded is 100°, in May, 1887, and the lowest 25 ̊, on several dates. Reliable frost data are not available. Year. SAN MATEO. The mean annual rainfall is 20.71 inches, or about 4 inches more than at Menlo Park. With the single exception of a rain in 1886, no rain has fallen during the month of July. The month of heaviest rainfall is January, and in this respect San Mateo differs from other points in the valley, December being the month of heaviest rainfall elsewhere. In the past twenty-seven years there has been but one year when the rainfall did not exceed 10 inches. In 1877 but 8 inches of rain fell. There have been fourteen years when the annual rainfall exceeded 20 inches. In 1894 over 34 inches fell. The greatest monthly precipitation amounted to 12.44 inches, during December, 1889. MONTHLY AND ANNUAL MEAN TEMPERATURE (DEGREES FAHRENHEIT). Mean (27 years). Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. Oct. Nov. Dee. 48.4 53.1 50.8 51.7 43.6 42.5 56.5 58.5: 60.2 43.2 48.4 51.0 59.3 62.8 67.7 64.3 67.0 63.2 57.6 46.5 51.2 45.5 44.1 47.5 47.7 49.3 49.6 51.6 52.2 47.9 49.6 65.4 Annual. 57.5 55.6 57.7 57.0 58.6 58.9 56.2 54.5 53.0 54.4 54.5 58.6 59.6 57.7 57.5 57.5 54.9 57.9 56.4 58.4 59.4 58.7 60.6 59.8 59.6 58.8 60.6 57. € 1878. 1879.. 1880. 1881. 1882. 1883. 1884. 1885. 1886. 1887. 1888. 1889. 1890. 1891. 1892. 1893. 1894. 1895. 1896. 1897. 1898. 1899. 1900. 1874.. 1875.. 1876.. 1877. 1878. 1879. 1880. 1881. 1882. 1883. 1884. 1885.. 1886. 1887. 1888. 1889. 1890. 1891. 1892. 1893. 1894. 1895. 1896. 1897. 1898. 1899. 1900. Year. Absolute maximum and year Year. Average (27 years).. MONTHLY AND ANNUAL PRECIPITATION (INCHES AND HUNDREDTHS). 96 1883 Dec. 68 Jan. Feb. Mar. Apr. .May. June. July. Aug. Sept. Oct. Nov. 5.22 1.32 2.16 0.99 0.79 3.58 1.29 0.06 3.86 3.48 5.85 1.24 2.51 1.64 2.13 4.26 2.34 0.80 0.79 1.72 3.98 0.00 0.84 1.58 8.70 0.76 1.58 0.03 1.11 0.08 1.81 2.92 3.40 0.05 4.20 0.05 4.50 0.15 1.93 0.59 0.92 7.59 0.00 0.00 0.00 0.00 2.46 3.71 0.07 0.90 9.06 1.88 3.09 3.68 7.42 4.27 0.55 0.16 T. 0.02 0.31 1.76 16.72 17.00 17.56 8.00 26.81 21.53 27.63 14.25 13.18 12.54 30.76 16.79 15.88 17.76 20.02 33.21 21.45 24.01 23.56 21.10 34.28 19.12 28.04 19.76 10.80 27.18 20.20 20.71 38 26 1882 37 34 36 32 38 40 40 40 32 45 39 39 1882 50 50 50 50 50 50 57 44 1879 Absolute minimum and year.... 1883 1882 a Also other years. 1881 1881 a 1879 1889 1881 a 1880 1879 SAN JOSE. San Jose, the county seat of Santa Clara County, lies about 50 miles southeast of San Francisco, or about 8 miles southeast of the lower end of San Francisco Bay. The elevation of San Jose varies from about 80 to 100 feet above sea level, and an elevation of 400 feet, except immediately south of the city, is not reached within a radius of 5 miles. Within 10 miles elevations ranging from 400 to 2,000 feet are reached. The general movement of the air is from the northwest. The influence of the Golden Gate, with its strong indraft of cool, fog-laden air is noticeable throughout the Santa Clara Valley. The valley, however, is somewhat sheltered from the strong westerly surface currents prevalent on the coast of California. Summer fogs, especially when low, do not drift inland, being as a rule barred by the mountains. High fogs occasionally blow over and down the mountain sides. Low winter fogs are not infrequent, and are probably due as elsewhere to a settling of the cooler air in the lowlands. The mean annual temperature, based upon records extending over a period of twenty-six years, is 58°. The coldest month is January, with a mean temperature of 48°, and the warmest is July, 66.7°. The highest temperature recorded within this period of twenty-six years was 104. The temperature has reached 100° but five times. The lowest temperature was 18°, or an absolute range of 86. No frost data are available. The mean annual rainfall for twenty-six years is 14.88 inches. About half of this falls in December, January, and February. July and August are practically rainless, as only three times during July and once in August has rain fallen to an appreciable extent. The rain has exceeded 20 inches in four years and less than 10 has fallen in four years. The driest year was 1875, with 5.51 inches, and the year with greatest rainfall was 1889, with 25.55 inches. The greatest monthly rainfall was 10.55 in December, 1889. MAXIMUM TEMPERATURES DEGREES FAHRENHEIT). Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 78 66 66 64 66 70 68 64 71 65 62 60 68 65 78 78 a 1878 27 37 33 30 34 68 72 66 62 82 72 70 67 80 82 1883 24 75 86 83 86 1879 74 66 85 69 70 75 84 a Also 1899. 87 1898 MINIMUM TEMPERATURES (DEGREES FAHRENHEIT). 44 42 44 29 43 42 34 42 46 29 94 94 89 82 44 84 32 90 94 91 93 50 53 104 100 1891 1892 92 I 1878.. 1879. 1880. 1881. 1882. 1883. 1884.. 1885... 1886. 1887. 1888.. 1889. 1890. 1891. 1892. 1893. 1894. 1895. 1896. 1897. 1898. 1899. Absolute maximum and year 1878. 1879. 1880. 1881. 1882. 1883. 1884....... 1885. 1886. 1887. 1888. 1889. 1890.. 1891. 1892. 1893. 1894. 1895. 1896. 1897. 1898. 1899. Year. .... Absolute minimum and year...... a Also 1894 and 1897. a 1883 1894 1894 1894 1894 1894 b Also 1897. Oct. Nov. Dec. 1894 1881 |
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