Year Rng.	1779-1820	1820-1865	Monthly Mean Temperature (F) from Loomis & Newton 
Month	Ser 1	Ser 2	Diff
1	26.31	26.73	0.42
2	28.08	28.16	0.08
3	35.80	36.36	0.56
4	47.17	46.53	-0.64
5	57.26	57.30	0.04
6	67.47	66.51	-0.96
7	71.70	71.62	-0.08
8	70.80	69.88	-0.92
9	62.84	62.20	-0.64
10	51.28	50.93	-0.35
11	40.04	40.59	0.55
12	30.56	30.29	-0.27