Average Temperature in Janesville by Year

This page contains a list of the average yearly high and low temperatures in Janesville, Wisconsin for each year between 1893 and 2023. It is based on NOAA data.

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What Was the Hottest Year Ever in Janesville?

2012 was the warmest year in the history of Janesville, Wisconsin. The average daily high temperature was 62.4 °F, and the average low was 40.5 °F.

What Was the Coldest Year Ever in Janesville?

1893 was the coolest year in the history of Janesville, Wisconsin. The average daily high temperature was 55.7 °F, and the average low was 31.9 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	7	60.3	40.0
2022	59	57.5	37.0
2021	12	59.9	39.1
2020	28	58.7	38.8
2019	63	56.2	37.2
2018	58	56.9	37.8
2017	10	60.0	39.2
2016	6	60.2	40.4
2015	52	58.3	37.3
2014	76	54.8	34.3
2013	71	56.2	35.8
2012	1	62.4	40.5
2011	41	57.9	38.6
2010	22	59.3	38.8
2009	64	56.5	36.5
2008	70	56.7	35.3
2007	32	58.8	38.3
2006	14	59.2	39.7
2005	23	59.4	38.5
2004	49	58.3	37.7
2003	56	58.3	36.8
2001	24	59.1	38.8
2000	54	58.3	36.9
1999	25	59.7	37.9
1998	2	61.0	41.0
1997	67	56.7	36.2
1996	75	55.1	34.1
1995	65	57.0	35.9
1994	68	57.1	35.1
1993	72	55.3	36.6
1992	66	56.2	36.7
1991	51	58.5	37.2
1990	42	58.5	37.8
1989	74	57.2	33.7
1986	37	59.0	37.7
1985	57	58.5	36.3
1984	33	58.9	38.2
1983	17	59.1	39.6
1982	47	58.6	37.5
1980	34	58.8	38.2
1979	60	57.5	36.8
1978	61	57.9	36.2
1977	44	59.5	36.8
1976	53	60.2	35.3
1975	18	59.8	38.9
1974	27	58.7	38.9
1973	4	59.8	41.7
1972	62	56.6	37.4
1971	20	59.6	38.9
1970	30	58.7	38.7
1969	46	57.9	38.3
1968	15	59.7	39.1
1967	55	57.5	37.5
1966	45	58.7	37.5
1965	29	58.7	38.7
1964	9	60.6	39.4
1963	36	59.6	37.1
1962	40	58.5	38.0
1961	21	59.3	39.0
1960	48	57.7	38.2
1959	38	58.0	38.7
1958	50	58.5	37.4
1957	26	58.8	38.8
1956	13	60.3	38.7
1955	11	60.7	38.3
1954	8	60.4	39.9
1953	5	61.5	39.7
1952	19	59.9	38.7
1951	73	55.8	36.0
1950	69	56.3	35.8
1949	16	60.3	38.5
1948	31	59.5	37.6
1947	39	58.6	38.0
1946	3	62.7	39.0
1945	43	58.7	37.6
1894	35	59.0	37.9
1893	77	55.7	31.9

Weather Station Details

Years	Station	Coordinates
1987–2024	Afton-Janesville WWTP	location
1893–1987	Janesville	location