Average September Temperature in Lebanon by Year

This page contains a list of the average monthly high and low temperatures in Lebanon, New Hampshire for the month of September each year between 1931 and 2023. It is based on NOAA data.

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What Was the Hottest September Ever in Lebanon?

2023 was the warmest September in the history of Lebanon, New Hampshire. The average daily high temperature was 75.7 °F, and the average low was 54.6 °F.

What Was the Coldest September Ever in Lebanon?

1963 was the coolest September in the history of Lebanon, New Hampshire. The average daily high temperature was 69.0 °F, and the average low was 37.5 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	1	75.7	54.6
2022	24	72.1	49.5
2021	7	74.8	51.9
2020	25	75.2	46.4
2019	29	73.7	47.5
2018	4	74.3	53.6
2017	3	76.9	52.1
2016	12	75.8	49.1
2015	2	78.1	51.9
2014	34	72.9	47.2
2013	35	72.1	48.0
2012	43	72.5	46.9
2011	6	73.6	53.1
2010	10	74.6	51.1
2009	57	70.4	46.8
2008	19	72.8	50.5
2007	30	74.4	46.9
2006	45	70.3	48.7
2005	9	76.0	49.9
2004	27	73.1	48.4
2003	44	70.7	48.5
2002	15	75.7	48.7
2001	53	72.7	44.9
2000	72	69.5	44.9
1999	16	73.9	50.4
1998	41	72.0	47.6
1988	67	69.9	45.7
1987	60	67.6	49.2
1986	71	67.2	47.1
1985	28	71.6	49.8
1984	74	68.6	44.4
1983	13	75.1	49.4
1982	33	71.2	49.6
1981	55	67.7	49.7
1980	48	70.9	47.4
1979	58	71.1	45.8
1978	77	69.0	42.1
1977	51	68.3	49.5
1976	68	69.0	45.9
1975	70	66.8	47.6
1974	64	68.2	47.9
1973	65	68.9	47.1
1972	63	70.3	46.2
1971	18	72.7	51.3
1970	50	69.1	48.9
1969	38	70.2	49.6
1968	21	73.0	49.3
1967	62	71.9	44.7
1966	80	67.1	43.3
1965	56	70.1	47.1
1964	81	68.2	42.1
1963	83	69.0	37.5
1962	78	66.8	44.3
1960	39	72.2	47.6
1959	14	75.3	49.2
1958	47	72.1	46.8
1957	40	74.3	45.4
1956	82	66.7	43.4
1955	61	72.5	44.1
1954	69	68.7	46.1
1953	46	73.7	45.3
1952	22	74.3	47.8
1951	42	72.5	47.1
1950	79	67.1	43.9
1949	66	69.7	45.9
1948	32	76.6	44.5
1947	20	76.2	46.4
1946	11	76.6	48.4
1945	5	76.6	50.9
1944	36	71.9	48.1
1943	73	69.7	44.3
1942	31	74.3	46.8
1941	26	76.4	45.2
1940	52	70.7	46.9
1939	54	71.8	45.6
1938	76	68.5	42.9
1937	59	71.6	45.3
1936	23	74.0	47.8
1935	75	68.1	43.6
1934	8	73.9	52.2
1933	37	72.1	47.7
1932	49	73.1	44.9
1931	17	74.2	50.1

Weather Station Details

Years	Station	Coordinates
1962–2024	Lebanon Municipal Airport	location
1931–1961	West Lebanon	location