4 BULLETIN 71, U. S. DEPARTMENT Uf AGEICULTUEE. 



range in maximum temperature amounts to 11°, New Orleans may be taken 

 as a representative station for tbe soutliern portion of tliis section. The maxi- 

 mum temperature lias exceeded 100° in but one year, 1901, wben 102° was 

 recorded, although a maximum of 100° was recorded in 1909. The temperature 

 reaches 90° every year, but there have been 14 years out of the last 39 in which 

 the temperature did not reach as high as 95°. During 36 years there have been 

 only 78 days when the maximum temperature rose to or above 95° at New 

 Orleans. 



The minimum temperatures of this section of Louisiana range from 1° at 

 Amite and Hammond to 19° at Lakeside, the range in minimum temperature 

 being 18°. During 36 years the minimum temperature has been below 32° at 

 New Orleans only 131 days, or an average of less than four times a year. The 

 temperature at New Orleans has fallen below 20° during a period of 36 years 

 in only 4 years, as follows: 1SS6, 15°; 1895, 16°; 1899, 7°; and in 1905, 18°. 

 Freezing temperatures occur to the Gulf coast in the months of January and 

 February, but owing to the season of the year and the ample warnings given 

 by the bureau to interests affected these frosts seldom cause any loss. 



It has been found that the recording stations in the country give somewhat 

 lower mean temperatures and also lower minimum temperatures than stations 

 situated in large cities, as New Orleans. Houma, in Terrebonne Parish, is 

 chosen as representing average conditions in the country in the alluvial sections, 

 and Cameron, in Cameron Parish, as being typical of the coastal plain region 

 in southwest Louisiana. The following frost and temperature data are taken 

 from the records of the Weather Bureau : 



Average earliest and latest dates of killing frosts at Cameron, Houma, and 'New 



Orleans, La. 



Station. 



Number 

 of years' 

 record. 



Average 

 date first 

 killing 

 frost in 

 autumn. 



Average 

 date last 

 killing 

 frost in 

 spring. 



Earliest 



date 



killing 



frost in 



autumn. 



Latest 

 date 

 killing 

 frost in 

 spring. 





15 



18 

 37 



Nov. 26 

 Nov. 20 

 Dec. 10 



Feb. 22 

 Feb. 28 

 Feb. 3 



Oct. 25 

 ....do... 

 Nov. 11 



Mar. 20 



Houma 



Mar. 25 



New Orleans . ... 



Mar 27 







Highest, lowest, and monthly and annual m.-ean temperatures, in degrees Fahren- 

 heit, at Cameron, Houma, and New Orleans, La. 



HIGHEST TEMPERATURES. 



Station. 



Num- 

 ber of 

 years' 

 record. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



High- 

 est. 



Cameron 



Houma 



New Orleans. 



16 

 19 



39 



85 

 81 



82 



101 

 84 

 82 



89 

 88 

 86 



94 

 92 

 89 



101 

 95 

 94 



101 

 100 

 98 



103 

 102 

 102 



102 

 99 

 100 



104 

 98 

 96 



100 

 93 

 94 



89 



89 

 85 



87 



82 

 83 



104 

 102 

 102 



LOWEST TEMPERATURES. 



Cameron 



16 



17 



13 



14 



35 



39 



44 



61 



45 



49 



30 



20 



13 



13 



Houma 



19 



17 



5 



25 



30 



42 



51 



58 



56 



44 



32 



25 



10 



5 



New Orleans. 



39 



15 



7 



30 



38 



52 



58 



60 



63 



55 



40 



29 



20 



7 



MONTHLY AND ANNUAL MEAN TEMPERATURES. 



Camoron 



Houma 



Now Orleans, 



14 



51.7 



53.9 



62. 



69.3 



75,2 



80.7 



81.8 



81.9 



79.0 



69.4 



61.8 



.54.9 



18 



54.3 



5,-). :{ 



0:i,4 



68,8 



75, 3 



80. 3 



81.2 



81.4 



78,5 



67.8 



61.0 



54.1 



39 



53.9 



56.8 



63.1 



68,7 



75. 1 



80,6 



82,3 



82,1 



78,8 



70.3 



61.6 



55.4 



68.5 

 68.4 

 69.1 



