Vermont Hardiness Map                  OH 53

Leonard Perry, Extension Professor

The hardiness map below is an enlarged portion of the USDA hardiness map, generated by Meteorological Evaluation Services of Amityville, NY. It was generated from the 1974-1986 data of the stations listed below having at least 10 years of data, as well as stations outside Vermont. This time period was the most recent prior to publication for which reliable data were available, giving 10 years for most sites. As can be seen, many sites have become colder over this period compared to the period of the previous USDA map, believed to be about 1930-1960. This recent period of cold extremes is verified by reports of freeze damage to plants which had not occurred during the earlier period. As with any hardiness zones, they are only a starting point in plant selection and hardiness considerations. (See OH 54 for a further discussion of hardiness).

 

Notes: lat=latitude, long=longitude, elev=elevation in feet above sea level, ---no data, msg=not enough data for 10 year average.

						Annual Minimum Extreme Temperatures in Degrees Fahrenheit
Station Name	lat		long		elev	Extreme Minimums													avg
	deg	min	deg	min	ft	1974	1975	1976	1977	1978	1979	1980	1981	1982	1983	1984	1985	1986	74-86
Ball Mountain Lake	43	07	072	48	1130	-21	-20	-26	---	-21	-25	-19	-23	-20	-23	-25	-8	-14	-20.4
Bellows Falls	43	08	072	27	270	-10	-11	-19	-15	-11	-17	-21	-20	-20	-11	-22	-10	-12	-15.3
Bristol 5 NNW	44	12	073	07	500	-23	-19	-25	-29	-18	-28	-30	---	---	---	---	---	---	msg
Burlington WSO AP	44	28	073	09	330	-24	-16	-24	-20	-19	-30	-26	-27	-17	-20	-17	-15	-14	-20.6
Cavendish	43	23	072	36	800	-25	-23	-31	-24	-25	-32	-25	-26	-28	-23	-30	-16	-20	-25.2
Chelsea	43	59	072	27	800	-26	-25	-31	-28	-24	-34	-32	-31	-29	-26	-30	-24	-20	-27.6
Cornwall	43	57	073	13	490	-26	-14	-25	-29	-18	-29	-23	-28	-19	-16	-13	-11	-15	-20.4
Dorset 1 S	43	15	073	06	980	-23	-17	-23	-15	-18	-30	-27	-22	---	---	---	---	---	msg
Enosburg Falls	44	55	072	49	420	-35	-31	-34	-30	-32	-38	-37	-41	-33	-31	-26	-30	-24	-32.4
Essex Junction 1 N	44	31	073	07	340	---	---	---	---	---	---	---	---	---	---	---	---	-22	msg
Montpelier FAA AP	44	12	072	34	1130	-22	-14	-19	-20	-21	-25	-27	-34	-18	-22	-23	-19	-13	-21.3
Morrisville 2	44	32	072	36	730	-32	---	---	-23	-27	-30	-33	---	---	---	---	---	---	msg
Mount Mansfield	44	32	072	49	3950	-23	---	---	-35	-24	-30	-38	-37	-28	-36	-25	-24	-27	-29.7
Newport	44	56	072	12	770	-33	-24	-31	-24	-28	-30	-28	-31	-27	-26	-24	-27	-23	-27.3
North Danville	44	28	072	07	1140	-28	-23	-24	-19	-22	---	---	---	---	---	---	---	---	msg
Northfield	44	10	072	39	670	---	---	---	---	---	---	---	---	---	---	---	---	---	msg
Northfield 3 SSE	44	06	072	37	1410	---	-25	-24	-22	-23	-27	-31	-35	-25	-20	-20	-22	-15	-24.0
Readsboro 1 SE	42	45	072	56	1120	-14	-15	-21	-14	-16	-25	-20	-21	-18	-12	-25	-7	-10	-16.7
Rochester	43	51	072	48	830	-25	-26	-30	-18	-23	-28	-30	-25	-25	-20	-28	-15	-14	-23.6
Rutland	43	36	072	58	620	-21	-14	-19	-16	-14	-26	-23	-23	-17	-16	-18	-8	-16	-17.7
St. Albans Bay	44	48	073	10	110	-29	-15	---	---	---	---	---	---	---	---	---	---	---	msg
Saint Albans Radio	44	50	073	05	390	---	---	---	---	-14	-26	-25	-31	-20	-22	-16	-19	-15	msg
Saint Johnsbury	44	25	072	01	700	-28	-21	-29	-25	-24	-32	-31	-31	-27	-21	-28	-23	-25	-26.5
South Hero	44	38	073	18	1100	---	-10	-18	---	-12	-20	-22	-26	-15	-14	-12	-12	-15	-16.0
South Lincoln	44	04	072	58	2020	---	---	---	---	---	---	---	---	-22	-21	-23	-19	-20	msg
Vernon	42	46	072	31	230	-12	-15	-18	-15	-12	-18	-20	-17	-18	-10	-22	-9	-11	-15.1
Waterbury 2 SSE	44	19	072	45	760	-25	-22	-26	-19	-23	-26	-26	-27	-22	-21	-23	-17	-13	-22.3
West Burke	44	39	071	59	900	-32	-27	-33	-30	-29	-37	-35	-38	-31	-25	-32	-29	-25	-31.0
Woodstock 2 WSW	43	37	072	33	750	-24	-27	-35	-24	-22	-37	-30	-24	-27	-26	-28	-16	-20	-26.1