Average September Temperature in Rexburg by Year

This page contains a list of the average monthly high and low temperatures in Rexburg, Idaho for the month of September each year between 1977 and 2023. It is based on NOAA data.

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What Was the Hottest September Ever in Rexburg?

2022 was the warmest September in the history of Rexburg, Idaho. The average daily high temperature was 81.1 °F, and the average low was 46.8 °F.

What Was the Coldest September Ever in Rexburg?

1985 was the coolest September in the history of Rexburg, Idaho. The average daily high temperature was 68.0 °F, and the average low was 34.3 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	8	74.8	45.2
2022	1	81.1	46.8
2021	11	76.8	42.3
2020	10	77.4	42.1
2019	15	72.4	45.2
2018	7	77.1	43.0
2017	25	72.0	41.6
2016	32	68.4	41.8
2015	12	75.4	43.4
2014	16	73.5	43.2
2013	6	73.2	46.9
2012	14	75.7	42.1
2011	5	76.9	43.9
2010	18	74.4	41.5
2009	3	79.3	43.9
2007	22	71.6	42.7
2006	33	69.6	40.0
2005	28	71.8	40.3
2004	38	69.7	36.7
2003	36	71.2	37.0
2000	26	73.7	39.8
1998	9	78.0	41.9
1996	37	70.4	36.3
1995	23	74.9	39.4
1993	20	73.9	41.6
1992	30	74.5	36.5
1991	21	73.4	41.3
1990	2	81.5	43.0
1989	27	75.8	36.9
1987	19	78.9	36.8
1986	39	68.6	35.4
1985	40	68.0	34.3
1984	35	70.5	38.4
1983	17	74.8	41.7
1982	31	71.0	39.8
1981	13	77.0	41.3
1980	29	73.4	38.5
1979	4	82.5	39.4
1978	34	70.6	38.9
1977	24	74.2	39.7

Weather Station Details

Years	Station	Coordinates
1977–2024	Rexburg BYU	location
1946–1976	Rexburg	location