DECEMBER, 1901-CLIMATOLOGY OF THE MONTH. Atmospheric Pressure. The mean pressure for the month, 30.09 inches, is .02 below the normal. At the United States Weather Bureau stations the highest observed was 30.56 inches, at Harrisburg and Scranton, on the 7th, and the lowest, 29.50 inches, at Philadelphia, on the 29th, and at Pittsburg on the 9th. Temperature. The means of the daily maximum and minimum temperatures, 37.5 degrees and 20.7 degrees respectively give a monthly mean of 29.1 degrees, which is 2.7 degrees below the normal, and is 2.1 degrees below the corresponding month of 1900. The average daily range was 16.8 degrees. The highest monthly mean was 36.0 degrees, at Philadelphia. The highest temperature recorded during the month was 77 de grees, on the 14th, at Lycippus. The lowest temperature was -18 degrees, on the 19th, at Hawthorn. The greatest local monthly range was 81 degrees, at Hawthorn. The least local monthly range was 50 degrees, at Philadelphia. The greatest daily range was 67 degrees, at Everett. Precipitation in Inches and Hundredths. The average precipitation for the month, 5.91, is 3.04 above the nurmal. The largest totals of rainfall and melted snow were: Mauch Chunk, 10.26; Pottsville, 9.73; Coatesville, 9.24; Kennett Square, 8.66; West Chester, 8.59; Ottsville, 8.33. The least were: Beaver Dam, 2.62; Warren, 3.10; Brookville, 3.32; Saergstown, 3.33; Franklin, 3.51; Irwin, 3.50. 15. Wind and Weather. The prevailing wind was from the northwest. Average number of rainy days, 11; clear, 7; partly cloudy, 9; cloudy, Lancaster a, Lebanon, Lock Haven, Lycippus, Renovo, Westtown 1, 1 Mean of 7 a. m. + 2 p. m. + 9 p. m. +9 p. m. 4. 2 Mean of 8 a. m. + 8 p. m. ÷ 2. The absence of a numeral indicates that the mean temperature has been obtained from daily readings of the maximum and minimum thermometers. All records are used in determining State means; but State departures are determined by comparison of current data of only such stations as have normals. A roman letter following the name of a station, or placed against the data in the body of the form, indicates the number of days missing from the record; for instance, "n" denotes 14 days missing. *Observed reading. †On other dates also. |