BULLETIN 57, HAWAII EXPERIMENT STATION 
Table 2. — Monthly and annual precipitation at Waimea for the calendar years 
1 919-1926 1 x and summary of the average monthly rainfall for the period 1891- 
1918 23 
Month 
1919 
1920 
1921 
1922 
1923 
1924 
1925 
1926 
Average, 
1891-1918 
Inches 
3.25 
1.59 
2.86 
2.79 
1.89 
2.85 
3.18 
3.06 
2.04 
.24 
.64 
4.78 
Inches 
7.06 
1.55 
3.15 
2.98 
1.22 
1.20 
2.26 
2.71 
2.27 
1.34 
3.79 
6.51 
Inches 
6.63 
.65 
3.51 
3.73 
1.78 
.93 
4.07 
2.44 
2.60 
1.68 
12.98 
5.14 
Inches 
6.61 
8.91 
9.06 
3.05 
1.47 
2.37 
2.27 
4.75 
5.09 
2.67 
2.86 
.93 
Inches 
12.60 
2.79 
8.43 
8.96 
2.26 
2.87 
3.70 
3.49 
2.32 
3.29 
2.49 
9.06 
Inches 
1.85 
3.60 
2.34 
4.46 
1.60 
.58 
2.82 
1.55 
.98 
6.14 
8.95 
3.40 
Inches 
2.86 
1.35 
7.39 
6.44 
2.80 
3.94 
2.11 
4.00 
2.23 
3.04 
2.07 
2.20 
Inches 
1.84 
2.31 
1.18 
3.06 
3.62 
1.77 
4.07 
Inches 
4.76 
February 
4.64 
March 
4.98 
April 
3.66 
May 
3.14 
June 
2.45 
July 
2.89 
August ... 
3.25 
September 
2.19 
October 
2.61 
November 
3.52 
December 
5.4] 
Total 
29.17 
36.04 
46.14 
50.04 
62.26 
38.27 
40.43 
43.50 
Departure from nor- 
mal 
-14.33 
-7.46 
+2.64 
+6.54 
+18. 75 
-5.23 
-3.07 
Number of rainy 
days * .. 
246 
223 
266 
282 
293 
274 
265 
231 
1 a/). 
1 The data in Tables 1 and 2 were obtained from the United States Weather Bureau Station, located at 
lot No. 52 of the first series of homesteads. This is 2 l A miles west of the experimental plat and would be 
somewhat drier than at the plats, since the rainfall decreases toward the west. 
* (12). * 0.01 inch of rain or more. 
While the rainfall in a single year is often subject to wide variation 
from month to month, the average from 1891 to 1918 shows a fairly 
uniform distribution throughout the year. The heaviest rainfall for 
the period 1891-1918 occurred during December, January, February, 
and March. In these four months occurs nearly half the rainfall of 
the year. During the remaining eight months the maximum vari- 
ation is 2.19 to 3.66 inches per month. The June and October mini- 
ma, which are characteristic of Hawaiian climate (#), are apparent 
but somewhat less pronounced than in most other localities. The 
monthly rainfall for the period 1919-1926 shows large deviations 
from the normal, but no greater comparatively than occur at the 
lower levels. Moreover, subnormal annual rainfall often is the result 
of small precipitation during the winter months and little depression 
during the drier summer months. 
In Table 3 is given the average monthly temperature at Waimea 
for the calendar years 1919-1926, and a summary of the average 
monthly temperature for the period 1908-1918. 
Table 3. — Average monthly temperature at Waimea for the calendar years 1919- 
1926 l and a summary of the average monthly temperature for the period 1908- 
1918* 
Month 
1919 
1920 
1921 
1922 
1923 
1924 
1925 
1926 
Average, 
1908-1918 
January 
op 
58.6 
60.6 
60.8 
62.4 
62.8 
65.6 
63.8 
64.8 
66.0 
65.6 
65.1 
64.2 
°F. 
62.1 
60.4 
60.7 
61.4 
66.4 
65.0 
65.2 
64.9 
64.3 
64.0 
62.2 
61.1 
°F. 
sa 5 
63.2 
62.1 
60.8 
65.4 
63.8 
63.4 
64.0 
62.8 
65.0 
63.0 
60.9 
°F. 
59.9 
57.7 
59.8 
61.4 
61.8 
64.0 
64.0 
64.2 
64.4 
65.4 
62.7 
62.6 
°F. 
60.1 
62.7 
61.4 
62.5 
63.0 
63.3 
64.1 
66.4 
66.5 
66.2 
63.3 
61.2 
°F. 
61.3 
62.0 
60.8 
64.4 
64.4 
64.9 
64.6 
64.4 
65.3 
64.6 
64.8 
63.2 
°F. 
61.4 
62.8 
61.2 
58.8 
61.0 
62.2 
65.2 
64.5 
65.8 
64.7 
65.0 
o F 
63.5 
63.6 
63.1 
62.0 
64.0 
68.7 
66.8 
°F. 
61.1 
February 
60.6 
March. 
61.2 
April 
61.8 
May 
63.1 
June 
63.2 
July 
64.0 
August 
64.9 
September 
65.3 
October. 
64.9 
November 
63.3 
December 
61.2 
Average 
63.4 
+0.5 
63.1 
+0.2 
62.8 
-0.1 
62.3 
-0.6 
63.4 
+0.5 
63.7 
+0.8 
62.9 
Departure from nor- 
mal 
I""~ 
a/). 
OB). 
