Average September Temperature in Twin Falls by Year

This page contains a list of the average monthly high and low temperatures in Twin Falls, Idaho for the month of September each year between 1925 and 2023. It is based on NOAA data.

Change:

Month:

What Was the Hottest September Ever in Twin Falls?

2009 was the warmest September in the history of Twin Falls, Idaho. The average daily high temperature was 82.6 °F, and the average low was 51.9 °F.

What Was the Coldest September Ever in Twin Falls?

1985 was the coolest September in the history of Twin Falls, Idaho. The average daily high temperature was 66.7 °F, and the average low was 39.7 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	23	77.7	48.2
2022	4	83.1	50.4
2021	21	78.5	48.1
2020	10	80.4	49.3
2019	44	74.3	47.3
2018	27	77.5	47.7
2017	43	74.9	47.3
2016	62	71.9	47.6
2015	5	80.5	52.7
2014	11	78.2	51.5
2013	12	77.0	52.1
2012	2	82.6	51.6
2011	3	83.5	50.1
2010	17	80.0	48.3
2009	1	82.6	51.9
2008	28	78.0	47.1
2007	35	76.5	47.1
2006	56	75.2	45.2
2005	46	75.7	45.6
2004	49	74.0	47.1
2003	25	77.5	47.9
2002	32	75.4	48.6
2001	8	80.1	50.2
2000	50	74.8	46.2
1999	53	76.4	44.3
1998	6	79.3	52.2
1997	40	76.0	46.6
1996	88	71.8	41.6
1995	60	76.1	44.0
1994	41	78.5	43.9
1993	85	73.9	40.5
1992	74	74.6	42.5
1991	51	75.4	45.5
1990	9	82.1	47.7
1989	64	76.2	42.4
1988	90	72.2	40.9
1987	57	78.7	41.6
1986	98	66.9	41.2
1985	99	66.7	39.7
1984	89	72.9	40.2
1983	71	74.7	42.7
1982	77	71.7	44.6
1981	61	77.3	42.8
1980	68	73.3	44.7
1979	24	80.5	45.3
1978	87	71.1	42.6
1977	82	73.9	40.9
1976	55	77.0	43.7
1975	42	79.0	43.2
1974	45	80.2	41.3
1973	70	73.7	43.9
1972	86	71.1	42.8
1971	96	72.5	36.4
1970	97	70.4	38.2
1969	30	79.3	45.5
1968	75	75.5	41.5
1967	16	81.1	47.2
1966	18	80.5	47.8
1965	94	69.4	40.0
1964	79	74.5	41.4
1963	7	80.5	50.1
1962	33	79.5	44.4
1961	91	69.9	42.9
1960	14	80.9	47.7
1959	76	72.0	44.5
1958	38	78.9	44.0
1957	31	81.2	43.0
1956	37	80.2	42.9
1955	54	78.3	42.4
1954	39	78.2	44.5
1953	19	81.7	46.6
1952	22	82.3	44.3
1951	52	79.3	41.5
1950	66	77.0	41.2
1949	26	81.9	43.4
1948	69	76.7	41.0
1947	65	77.7	40.6
1946	81	75.1	40.4
1945	83	74.7	40.0
1944	63	77.7	41.2
1943	13	82.6	46.1
1942	59	79.0	41.3
1941	95	70.2	39.2
1940	73	74.7	42.5
1939	47	78.9	42.3
1938	15	84.4	44.2
1937	20	80.2	46.5
1936	80	74.6	41.2
1935	29	80.6	44.3
1934	78	75.2	41.1
1933	58	77.0	43.4
1932	48	77.3	43.9
1931	72	75.4	41.9
1930	67	76.8	41.3
1929	92	72.4	38.7
1928	36	80.3	43.4
1927	84	72.7	41.8
1926	93	73.3	37.0
1925	34	77.1	46.6

Weather Station Details

Years	Station	Coordinates
1998–2024	Magic Valley Regional Airport	location
1977–1997	Twin Falls 6 E	location
1925–1976	Twin Falls 3 SE	location