Date. 1899. 1900. Monthly mean. 8 p. m. Temperature. Mean. Maximum. O Minimum. Monthly. In. In. In. January. 29.98 30.24 29.35 50.1 56.1 58.3 47.6 53.0 78 58.0 45.3 51.6 80 29.89 30.21 29.53 49.1 54.7 57.3 47.1 52.21 74 April... 29.87 30.05 29.61 49.6 May.. 57.6 61.2 47.9 54.6 June 56.9 29.78 29.97 July.. 73 August.. 29.78 29.86 29.66 54.7 60.0 29.88 30.10 29.48 54.4 58.6 63 49.1 54.9 94 Year 29.87 30.34 29.35 51.0 56.9 60.7 Extremes. Maximum. Minimum. 59.6 63.7 51.6 57.6 74 Dew point. 8 a. m. 8 p. m. 8 a. m. In. In. 0.312 0.315 3.67 0.295 0.321 0.10 0.321 0.342 7.61 0.307 0.311 0.62 0.295 0.297 0.86 0.01 50 51 95 80 0.359 0.370 0.00 0.391 0.395 T. 0.382 0.399 0.00 85 71 0.364 0.364 3.92 0.383 0.402 3.79 92 74 0.353 0.354 92 77 48 52 53 98 81 37 44 44 89 76 0.290 0.296 2.65 52.6 80 43 44 45 88 70 42 47 48 92 81 43 45 45 87 66 Rela tive hu midity. 86 74 46 88 75 48 52 53 90 82 8 p. m. January. April.. May.. 29.84 30.03 29.67 52.2 59.0 63.5 50.6 57.0 71 June 29.79 29.96 29.63 53.2 July.. 51.9 58.2 73 53.9 59.7 82 64.7 70.4 56.2 63.3 92 47 53 51 84 60.4 65.1 52.4 58.8 83 51 50 88 71 August.. 75 29.86 29.97 30.17 29.63 48.8 52.9 54.7 46.7 50.7 64 29.83 30.00 29.54 50.2 55.8 59.5 48.4 54.0 69 45 44 46 81 70 0.294 0.312 1.08 70 0.337 0.348 0.32 76 0.377 0.390 0.05 ! 46 48 90 84 0.310 0.335 48 49 89 76 0.335 0.350 47 51 52 94 Moisture. Vapor pressure. 8 a. m. 48 49 90 76 0.338 0.347 23.23 8 p. m. 50 52 52 90 Precipitation. Cloudiness. Total. In. In. 52 92 75 0.374 0.381 T. 76 0.396 0.398 T. Maximum in 24 40 49 49 88 74 0.349 0.354 15. 33 a From observations at 8 a. m. and 8 p. m. 76th meridian time. Local mean time 3 h. 10 m. slow. 4.11 1.92 5.6 5.7 5.8 0.64 0.50 3.9 4.4 3.8 1.91 0.90 4.8 4.6 4.5 0.36 3.8 4.3 3.8 0.22 3.9 4.0 3.3 0.04 6.5 3.7 3.9 T. 4.9 1.4 2.0 T. 4.7 3.2 3.4 0.45 2.9 2.4 2.6 0.34 4.1 3.9 3.9 1.66 4.6 5.2 5.4 0.74 4.8 4.7 5.0 1.92 4.5 4.0 4.0 'Daylight. 0.98 4.8 7.0 6.7 I ANNUAL METEOROLOGICAL SUMMARY FOR THE YEARS 1899 AND 1900-Continued. [H=155 ft.; ht=161 ft.; hr=154 ft.; ha=167 ft.] Mi. 7.9 SE. 47 SW. 8.7 W. 39 W. W. 36 W. 11.7 W. 38 W. 9.8 13.9 W. 37 W. 14.2 W. W. 44 15.3 SW. 41 W. 14.4 SW. 39 W. 12.6 SW. 40. W. 41 W. 8.5 W. 6.6 SE. 30 SW. 8.6 N. 30 SW. 11.0 W. 47 SW. Year 1900. January.. February 46 SE. 7.2 N. 7.2 W. 10.0 W. March April.... May. June 32 W. 35 SW. 11.8 W. 35 W. 12.1 W. 39 W. 14.3 SW. 41 W. July.. 14.5 SW. 37 SW. August.. 13.1 SW. 38 SW. September 10.9 W. 32 SW. October.... 9.1 W. 31 SW. November 6.9 N. December..... 7.3 Year.... 10.4 43 S. N. 48 S. W. 48 S. Sept. 6, 1849.. Oct. 15, 1849. Oct. 16, 1849. SOME MAXIMUM AND MINIMUM TEMPERATURES. The following tables showing the temperature when the thermometer registered 80° or above and 32° or below (Fahrenheit), with dates of same, were kindly furnished by Mr. Thomas Tennent. The thermometers used by Mr. Tennent were self-registering instruments purchased from McAllister & Co., of Philadelphia, Pa., and brought out by him in 1849; they were tested and found to be correct. The thermometers were exposed on the north side of a building, on supports about 10 inches from the walls and about 6 feet above the ground. The readings were made by Mr. Tennent personally, and cover the period from September 1, 1849, to December 31, 1871: Maximum temperatures. °F. 30 Feb. 9, 1857. Jan. 7, 1858. 28 Jan. 14, 1858. 30 Feb. 9, 1858.. 31 Mar. 18, 1858 31 32 32 29 Dec. 9, 1858. 31 Jan. 7, 1859 32 Jan. 9, 1859. 32 Jan. 10, 1859 30 Jan. 11, 1859 30 Jan. 12, 1859. 29 Dec. 22, 1859 . 30 Jan. 18, 1861 30 30 32 31 25 31 29 32 28 29 Feb. 1, 1862. 30 Feb. 2, 1862. 30 Feb. 3, 1862. 30 Feb. 4, 1862. Dec. 3, 1858. Dec. 7, 1858. Dec. 8, 1858. Jan. 3, 1862. Jan. 4, 1862. Jan. 24, 1862. Jan. 25, 1862. Jan. 26, 1862. Jan. 27, 1862. Jan. 28, 1862. Jan. 29, 1862. Jan. 31, 1862. 31 Feb. 7, 1862. 29 Feb. 8, 1862. 32 Feb. 20, 1862. 30 Mar. 9, 1862 NOTES FROM THE RECORD OF G. H. GIBBONS, M. D [From the California Star, San Francisco.] January 19.-Ice nearly one-fourth inch thick-the first of the season; said to be a cold winter. February 13.-Heavy rains still continue at regular intervals of four to eight days. Already more rain this season than in last three years. April 3.-A number of heavy rains in last six days. Dry weather for four or five weeks preceding. Dry weather appears to have followed. 1847. May 8.-During the past week a succession of showers, sufficient to moisten the earth-the annual "May rains;" none to come after. San Joaquin country flooded; unusual amount of rain on the mountains in winter. May 22.-Several light showers during past week. July 2.-A light but refreshing shower, barely sufficient to render the dust adhesive; a promise of more. August 28.-A heavy shower of rain in evening, with thunder and lightning, extending some miles back. September 25.-Sou'westers, sea fogs, etc.; "cool to overcoating" this week. October 20.-A furious norther, lasting till evening. October 30.-Weather dubious, inclining to "heavy wet." November 6.-Winter fairly closed in. The past week cold and disagreeable, with drenching rains and cold winds. For a few days no locomotion allowed. 1848. February 26.-Rain fell abundantly the past week, and snow on the mountains. March 18.-Heavy rains during the week. Several weeks preceding the weather was delightful; 63°. 1849. [San Francisco Whig of September 3, 1852.] September 19.-Thunderstorm on Mokelumne River. [From the Alta-California, April 17, 1850.] The first southeast blow was on November 13 and the last in March; 7 southeast blows in that period, and seventy-one days rain in those one hundred and thirty-nine days. Mean barometer 29.12; temperature 57°. November 19.-Rain at times; began in morning; slight showers frequent through the day and night. Severe gale from southeast in p. m.; blew down Presbyterian church on Stockton street and damaged shipping. November 22.-Rain storm. Price of carting raised from $1 and $1.50 to $2 and $2.50 from mud. The tables of monthly and seasonal rainfalls for San Francisco are given on page 9. TOTAL NUMBER OF DAYS ON WHICH PRECIPITATION HAS FALLEN FROM MARCH 1, 1871, TO MARCH 1, 1901. January March April May June.. July August September.... October... November. January March April May June. January March April May June.. Month. January March April May June.. Record commencing September 1, 1881. Month. Month. Month. 30 to 35. 20 21 41 82 121 196 Velocity. 2 to 3. 8.8 10.5 13.4 16.7 18.0 20.8 48 SW. 48 SW. 44 N. 47 NW. 45 W. 48 Direc- Over 40. 3 to 4. Date. 8.6 10.8 14.1 17.3 18.5 21.3 2 8 Less than 26, 1875 a 22, 1891 8, 1880 23, 1871 11, 1897 30,1873 a Cups blew off before maximum was reached. 4 to 5. NUMBER OF HIGH WINDS, SEPTEMBER, 1881, TO DECEMBER 31, 1900." 52 8 July 1 August • October.. 31 31 0.01-0.10. 0.11-0.25. 0.26-0.50. 0.51-1.00. a All wind velocities are given in miles per hour. November. 113 July 125 129 101 8.0 July 10.8 14.1 August 16.9 18.1 November 21.0 December 74 46 16 13 32 62 77 7 AVERAGE VELOCITY OF AFTERNOON WINDS. Month. Month. Month. 56 63 44 24 1 22 HIGHEST WIND VELOCITY, DIRECTION, AND DATE FOR EACH MONTH TO DECEMBER 31, 1900. 47 58 b Also other dates. 41 42 40 41 56 60 2 to 3. 61 21.0 20.2 17.7 13.4 9.2 8.4 Over 1.00. |