398 METEOROLOGICAL OBSERVATIONS IN CALIFORNIA. 



APPENDIX. 



METEOROLOGICAL OBSERVATIONS IN CALIFORNIA 



Mr. T. Butler King was furnished by Surgeon General Lawson, United States 

 Army, with the following thermometrical observations : 



At San Francisco, by Assistant Surgeon W. C. Parker, for six months, embracing 

 the last quarter of 1847, and the first quarter of 1848. The monthly mean tempera- 

 ture was as follows ; October, 57° ; November, 49° ; December, 50° ; January, 49° ; 

 February, .50° ; March, 51°. 



At Monterey, in latitude 36° 38' north, and longitude 121° west, on the coast, 

 about one degree and a half south of San Francisco, by Assistant Surgeon W. S. 

 King, for seven months, from May to November inclusive. The monthly mean 

 temperatnre was : May, 56° ; June, 59° ; July, 62° ; August, 59° ; September, 58° ; 

 October, 60° ; November, 56°. 



At Los Angeles, latitude 34° 7', longitude west 118° 7', by Assistant Surgeon John 

 S. Griffin, for ten months, from June, 1847, to March, 1848, inclusive. The monthly 

 mean temperature was : June, 73° ; July, 74° ; August, 75° ; September, 75° ; Oc- 

 tober, 69° ; November, 59° ; December 60° ; January, 58° ; February, 55° ; March, 

 58°. This place is about forty miles from the coast. 



At San Diego, latitude 32° 45', longitude west 117° 11', by Assistant Surgeon J. 

 D. Summers, for the following three months of 1849, viz : July, monthly mean tem- 

 perature, 71° ; August, 75° ; September, 70°. 



At Suttersville, on the Sacramento river, latitude 38° 32' north, longitude west 

 121° 34', by Assistant Surgeon R. Murray, for the following months of 1849. July, 

 monthly mean temperature 73° ; August, 70° ; September, 65° ; October, 65°. 



These observations show a remarkably high temperature at San Francisco during 

 the six months from October to March, inclusive ; a variation of only eight degrees 

 in the monthly mean, and a mean temperature for the six months of fifty-one degrees. 



At Monterey we find the mean monthly temperature from May to November, in- 

 clusive, varying only six degrees, and the mean temperature of the seven months to 

 have been 58°. If we take the three summer months the mean heat was 60°. The 

 mean of the three winter months was a little over 49° ; showing a mean difference, 

 on that part of the coast, of only 11° between summer and winter. 



The mean temperature of San Francisco, for the three winter months, was pre- 

 cisely the same as at Monterey — a little over 49°. 



As these cities are only about one degree and a half distant from each other, and 

 both situated near the ocean, the temperature at both, in summer, may very reason- 

 ably be supposed to be as nearly similar as the thermometer shows it to be in winter. 



The mean temperature of July, August, and September, at San Diego, only 3° 53' 

 south of Monterey, was 72°. The mean temperature of the same months at Mon- 

 terey was a little over 59° ; showing a mean difference of 13°. 



At Los Angeles, 40 miles distant from the coast, mean temperature for the three 

 summer months was 74° ; of the three autumn months, 67° ; and three winter 

 months, 57°. At Suttersville, 130 miles from the sea, and 4° north of Los Angeles, 

 mean temperature of August, September and October, was 67°. Mean tempera- 

 ture of same months at Monterey, 59° ; making a difference of 8° between the 

 coast and the interior, on nearly the same parallel of latitude. 



