20 
CLIMATE OF LONG ISLAND. 
I. LONG ISLAND. 
Localities observed. Easthampton, Oysterbay, Jamaica and Flatbush. 
TABLE I. Comparison between calculated and observed temperatures. 
LOCALITIES. 
Number of 
years 
observed. 
Latitude. 
Elevation. 
Temperature 
due to latitude 
and elevation 
Observed 
temperature. 
Variation of 
observed from 
calculated 
temperature 
Easthampton. 
16 
o 1 
o 
16ft. 
50°. 95 
48°. 40 
— 2°.55 
Oysterbay. 
2 
40 50 
50f 
51.03 
51.03 
— 0.00 
Jamaica . 
17 
40 41 
100f 
51.12 
49.43 
— 1.69 
Flatbush. 
17 
40 37 
40 
51.39 
51.25 
— 0.14 
t Elevation estimated. 
TABLE II. Comparison of mean temperature, and annual extremes of heat and cold, with the average of the 
State during the same years. 
FACTS OBSERVED. 
Easthampton 
15 years. 
Oysterbay. 
3 years. 
Jamaica. 
15 years. 
Flatbush. 
15 years. 
Mean temperature .... 
Mean annual maximum, 
Mean annual minimum, 
Mean annual range.... 
+1°.91 
— 2.80 
-f-13.87 
—16.67 
-f- 4°.54 
+ 1.66 
+15.33 
—13.67 
+ 2°.94 
— 1.20 
+13.60 
—14.80 
+ 4°.76 
— 2.80 
+15.67 
—18.47 
TABLE III. Comparison of the forwardness of the seasons, with the average of the State during the same years. 
FACTS OBSERVED. 
Easthampton 
Oysterbay. 
Jamaica. 
Flatbush. 
Robins first seen . 
Day's 
— 8 
Days. 
Days. 
+ i* 
- 8f 
Days. 
— 15t 
— st 
— 6} 
Shadbush in bloom .... 
Peach do .... 
+ 6 
+ 9f 
— 8* 
Currants do .... 
+ 5f 
- 10f 
- 12t 
Plum do .... 
Cherry do .... 
+ 2 
— 4 
- 10f 
— 9 
- 8t 
Apple do .... 
+ 9t 
- 5t 
- 5t 
Lilac do .... 
Strawberries ripe . 
Hay harvest commenced, 
— 2 
— 4t 
— 6f 
— 12 
— 6 
- 12t 
— 9 
Wheat harvest ditto .. . 
— 2f 
- 12t 
- lot 
First killing frost .... 
+ 30f 
+ 4t 
T lit 
* The result of less than four years’ observation, 
t The result of observations for ten years or more. 
REMARKS ON THE FOREGOING TABLES. 
The distinguishing feature in the climate of this section of the State, is the uniformity 
of its temperature, occasioned by the equalizing influence of the ocean. Although the 
places of observation are on a low level, and in the extreme south part of the State, the 
greatest heat of summer is 1^° less on an average, than in other parts of the State which 
are further north and more elevated. On the contrary, the extreme cold of winter is less 
by 10° to 18°, and has been so uniformly every year for the past fifteen years. 
