ee 
= = 
H. Gibbons on the Climate of San Francisco for 1855. 307 
_ cloudy throughout. Rain fell on twelve days, quantity 4-31 in; 
mist on four mornings and one evening. Wind N and NW eight: 
days, NE and E one day, SE and S nine days, SW and W thir- 
teen days. Moderate breezes prevailed and there were no high 
winds. The month was remarkably warm, being five or six 
degrees above the average for a number of years past. There 
were several slight frosts, but not to impede the growth of vege~ 
tation. 'The general range of the thermometer at noon was from 
64° to 70°, and on five days it rose above the latter figure. 
The rainy temperament of the last week of February was con- 
tinued through the first two weeks of March, and was succeeded, 
in accordance with the habits of our climate, by a period of 
perfectly dry weather, lasting a fortnight. Copious rains again 
fell on the 30th and 31st. The streams in the interior were 
much swollen about the 6th. 
metric means: sunrise 29-828, 9 a. mu. 29°835, noon 
29791, 10 p. m. 29-828. Maximum 29-99, nie 295 
: itigy- 
est temperature 78°, lowest 40°. Warmest morning 57°, coldest 
Noon 56°. Proportion of clear sky 63 per cent, cloudy 37. 
Whole days clear ten, cloudy three. Rain on ten days, quantity 
559 in. Slight mist on two mornings. Wind NW and N eight 
days, NE and E one day, SE and S five days, SW and W six- 
teen days. Land winds 30 per cent, sea winds 70. In this 
month the sea breeze commences. Several of the afternoons 
were windy, and twice the wind was high. The temperature 
Was rather below the usual mean for April. The nights com- 
Monly ranged from 46° to 55°, and the noonday temperature from 
62° to 70°. There was a general white frost on the morning of 
the 2nd. A greater quantity of rain fell than in any other month 
of the year. From the 10th to the 17th every day was more or 
rainy, but in all the rest of the month there were but two 
days on which rain fell, and then in very small quantity. About 
the middle of the month the streams in the interior were much 
tage Lightning was observed on the 11th and distant thunder 
on the 15th. 
‘Barometric mean at sunrise 29853 in., at 9 a. m. 29-861, at 
noon 29:859, at 10 p,m. 29'860, Extremes 30-17 and 29-47. 
—Temperature at sunrise 50°-06, 9 a. u. 57°°84, noon 
~e 
