AnnualReport-1909

Table II.

Monthly and Annual Means of the Principal Meteorological Elements at the Hongkong Observatory for the year 1909, and departure from the mean of 25 years (+ excess; - defect).

Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Year Bar. Pressure at M.S.L.* Departure 30.100 30.106 30.016 29.951 29.883 29.701 29.765 29.781 29.780 29.888 30.067 30.175 29.945 .060 .039 .013 .006 +.022 +.029 +.036 +.038 -.037 .097 .040 .001 60.6 60.4 64.1 71.1 74.9 82.1 82.2 82.8 82.2 77.8 70.4 63.6 72.7 Temperature Departure + 0.5 + 2.4 + 1.4 Rel. Humidity 80 81 81 79 83 80 81 Departure + 6 + 2 + 6 Vap. Tension (Inches of Mercury) 0.431 0.431 0.497 0.612 0.720 0.876 Departure Sunshine (Total hours) 57.8 155.4 -18.2 +51.1 Departure 2.2 Cloudiness % 83 80 85.0 85.6 64.2 Departure +19 + 4 + 9 + 3 + 2 + 2 Rainfall (Total Inches) 1.460 1.660 2.345 2.455 6.700 7.385 12.825 +0.002 —0.090 −0.518 —8.427 -5.595 8.998 +0.055 5.861 -1.132 +19.423 1.387 -1.185 -8.713 E 15° NE 11° NE 5° NE 8° Wind Direction Vịt 5° NE 78° SE 15° SS 32° W E 2° SE 24° NE51° NE 18° N] E 1° S Departare 1° + 3 + 9° F° 18° +25° 11° + 7° + 13° 8.340 8.505 23.985 0.053 +.009 113.9 230.3 232.0 215.3 202.6 137.5 187.1 249.7 39.9 + 74.1 +50.2 +137 + 60 - 74.8 2.6 +70.5 85 78 70 64 63 80 57 01 + 6 + 29 + 6 Wind Velocity (Miles per hour). 14.1 14.2 16.5 + 0.3 0.3 + 0.6 14.1 13.4 12.5 14.1 0.8 +0.4 + 0.1 + 3.2 7.8 1.9 9.0 16.8 2.9 + 2.2 12.6 11.4 13.0 0.5 1.0 0.1

NB —The observations for 1909, as above, are compared with the 25 year means for the period 1884 to 1908 inclusive.

* Not corrected to Standard Gravity.