o 
34 
and, or the Pacific High. 
Monthly maximum, minimum, and mean temperatures for a ten year period 
are shown in Figure V. The temperature variation shown is indicative of a 
'marine environment. The mean annual range is l6°F. From December through 
- v, *' 1 ' ■ " 
April the means range between 66°F and 69°F, and during the remainder of the 
year between "JO F and 8l F, the warmest months being July, August and 
September, and the coolest January, February and April. An inexplicable 
departure from the normal curve occurs in maximum, minimum and mean figures 
I , 
o O 
for April. A 37 degree difference exists between the absolute high of 89 F 
and the absolute low of 52°F for this ten year period. 
Mean monthly precipitation and the number of days with measurable 
precipitation are' tabulated in Figure FT. Rain or drizzle most frequently 
occur from December through May, and least frequently in June and July. 
The mean annual precipitation for the period is 42.59 inches, with a maximum 
, / 
of 5.O7 inches occurring in January and August, and a minimum of 2.03 inches 
in November. A secondary maximum of 4.92 inches occurs in October. Comoining 
amount of precipitation and days with measurable precipitation shows May and 
'' * V 
June to be the driest months of the year. During the remaining months measur¬ 
able rain falls on from 10 to 17 days. No snow has been recorded. Thunder¬ 
storms have been recorded in all months except February, March and April out 
peak activity seems to occur during August, September and November. The 
annual average relative humidity is 76 percent with a high monthly mean of 
89 percent and a low of 62 percent. '<■ 
During the periods for which data are available no tropical storm, or 
typhoon has passed through the area, though storms of tropical 
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