46 
METEOROLOGY OF 1 897. 
§ 42. Every day on which enough rain falls to measure 
is included in the list of stormy days, and these are shown 
graphically in figure 13. d'he number of stormy days varies 
in nearly the same wa}^ as the amount of rainfall. While 
the precipitation in April exceeds that in March, the num- 
ber of stormy days is less, which indicates that the amount 
received in each storm is greater in April. Likewise the 
storms in August average less than those in July. 
§43. There is considerable range between the highest 
and lowest rainfalls recorded in any given month as is evi- 
dent by inspection of table 5. d'he heavier, continued 
storms, lasting all day or extending through several days, 
occur principally in May, but the period when such storms 
are possible extend through April and forward into June. 
After this period the prevailing storms in the summer 
months are local thunder storms. 
HO OF 
STORMY DAYS. 
12 
II 
10 
g 
/ * 
8 
/ / 
ic V 
% \ 
7 
/ / 
\ 
\ \ 
^ \ 
6 
/ 

5 
— 
f 
\ 
4 
> 
t — 
^ ^ 
3 
2 
1 
j 
r 
A 
M J 
i J 
1 
A 
s 
0 N‘ 
\ 897 . NORMAL. 
Fig. 1:1. 
§44. Figure 14 shows the changes in temperature dur- 
ing the different months of the }ear as well as the average 
and the normal, d he upper end of the line in any month 
indicates the highest temperature recorded during the 
month at any time, and the lower end indicates in a sirnilar 
manner the lowest temperature during the month. 1 he 
scale of temperatures is shown at the left side of the dia- 
gram. I'he length of the line thus shows the range during 
the month. . 
§45. The thicker portion of the line shows the limit of 
the ternperatures on the average day. The upper ends of 
this portion, indicated by the cross line, show the average 
of the highest and lowest temperatures for each day through- 
