680 



ANNUAL REPORT OF THE 



Off. Doc 



COMPARISON OF TEMPKRATURK AND RAIN- 

 FALL OF 1900 WITH RECORDS OF PRFVIOUS 

 YEARS. 



BY E R. DEMAIN, Observer, Weather Bureau, Harrisburn, Pa. 



A comiiai'ison of some of the weather conditions prevailing at 

 Harrisburg during the year 1900 with the record of former years, dis- 

 closes several features of interest. In order to show clearly the 

 principal points of dilTerence the following table is presented: 



Year. 



Id 

 «-i 



B 



"3 



1S89, 

 1S90, 

 1891, 

 1S92, 

 1893, 

 1S94, 

 1895, 

 1896, 

 1897, 

 1898. 

 1899, 

 1900. 



Average, 



57.07 

 42.63 

 43.40 

 33.65 

 35.18 

 40.56 

 26.02 

 35.06 

 33.66 

 45.09 

 33.98 

 28.94 



38.44 



An exarainatio4i of this table will show that 1900 was the warmest 

 year since the Weather Bureau station was established in the city. 

 The mean or average temperature for the year was 54.3 degrees, 

 which is 2.1 degrees above the average for 12 years and 0.7 degrees 

 higher than the average for 1898, which ranks second in point of 

 heat; the coldest year was 1893 with an average of 50.4 degrees or 

 3.9 degrees lower than the record for 1900. The departure in tem- 

 perature values during the first half of the year was comparatively 

 (Slight, the excess being about 0.7 degrees. During the months of 

 F(;bruary, March and December there was a deficiency io tempera- 

 ture. The great excess in temperature for the year was due largely 

 to the long periods of heat which prevailed at short intervals during 

 the months of July to November, inclusive, and especially to extra- 

 ordinarily high temperatures of October which was decidedly the 

 warmest October since the beginning of observations by the Weather 

 Bureau, the average for the month being 60.G degrees or 0.9 degrees 

 <*bove the normal October temperature. The highest temperature 

 ■^f the year was 100 degrees on July 17. This record has been ex- 



