Sisseton, SD: Summer

31 August 2026: Summer 2026 averaged 70.5°F in Sisseton, SD, the warmest summer since 2023, tied 29th warmest of 93 (with 1995 and 1964).

Summer 2026

Mean temperature: 70.5°F; Warmest since 2023; 29th warmest of 93
Precipitation: 10.39 in; Wettest since 2025; 36th wettest of 93

A normal summer in Sisseton, SD (1991 to 2020): a mean temperature of 69.6°F, between 65.5°F and 70.7°F in eight years of ten and 8.63 in of precipitation, between 6.73 in and 12.65 in in eight years of ten.

The mean temperature of every summer in Sisseton, SD since 1932: 70.5°F in 2026; the highest is 74.6°F, in 1976.

Normal range, 65.5 to 70.7°F

Every year, ranked, as a table

Every summer in Sisseton, SD from 1932 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	70.5	29	82	40	59	21	10.39	36	0
2025	68.8	74	79	83	58.5	34	13.70	4	0
2024	70	39	80.5	73	59.6	11	9.23	49	0
2023	70.8	23	83.1	28	58.4	36	11.97	20	0
2022	73.4	4	84.8	14	62.1	1	7.12	71	0
2021	72.9	7	85.5	11	60.3	4	11.90	22	0
2020	71.7	15	83.6	21	59.7	9	6.04	84	0
2019	68.4	77	78.6	85	58.1	42	12.48	11	0
2018	70.4	32	81.3	50	59.6	11	10.76	34	0
2017	69.3	60	82	40	56.5	76	8.55	54	0
2016	70	39	82.5	32	57.6	52	10.40	35	0
2015	69.2	63	81.5	48	57	68	6.74	75	0
2014	67.7	84	77.9	87	57.4	59	12.59	9	0
2013	69	68	80.6	69	57.5	56	9.33	48	0
2012	70.7	25	83.3	25	58	44	5.99	85	0
2011	70.4	32	80.7	63	60	6	11.06	32	1
2010	70.3	35	81.1	54	59.5	14	8.29	55	0
2009	65.5	89	76.4	91	54.6	89	7.91	61	0
2008	68.2	79	79.9	78	56.4	77	10.19	39	0
2007	69.7	49	80.8	62	58.6	29	8.67	52	0
2006	71	19	83.1	28	58.9	23	7.13	70	0
2005	69.5	54	80.4	75	58.6	29	13.19	7	0
2004	65	92	76.3	92	53.8	91	6.91	74	0
2003	69.8	45	81.4	49	58.3	40	8.07	58	3
2002	69.7	49	81.1	54	58.4	36	11.13	30	3
2001	69.6	51	81.1	54	58.1	42	7.45	67	2
2000	68.1	81	80.3	76	55.9	86	10.16	40	1
1999	69	68	80.7	63	57.4	59	7.50	65	8
1998	69.6	51	80.5	73	58.7	27	8.20	57	3
1997	69.6	51	80.7	63	58.5	34	7.40	68	9
1996	68.9	72	80.2	77	57.6	52	6.63	77	6
1995	70.5	29	80.9	61	60	6	9.56	45	2
1994	67.8	83	78.6	85	57.2	64	8.58	53	4
1993	65.4	91	75.6	93	55.2	88	15.68	1	4
1992	64.6	93	75.5	94	53.7	92	9.50	46	0
1991	70.7	25	81.3	50	60.2	5	13.56	5	1
1990	69	68	80.7	63	57.2	64	9.50	46	1
1989	70	39	82.3	36	57.7	51	11.21	29	2
1988	74.5	2	88.2	4	60.9	3	7.52	64	0
1987	71.1	18	83.5	23	58.6	29	4.81	89	1
1986	69.8	45	80.7	63	58.8	25	12.95	8	3
1985	67.6	85	79.9	78	56.1	84	6.92	72	7
1984	71.4	17	83.2	26	60	6	12.27	15	5
1983	74	3	86.3	7	61.9	2	8.90	51	1
1982	69.5	54	82.7	31	56.3	81	3.90	92	1
1981	69.3	60	81.2	52	57.3	61	7.98	59	1
1980	69.5	54	82.2	37	56.8	73	10.13	42	1
1979	67.9	82	79.4	82	56.4	77	12.24	16	1
1978	69.9	42	81.9	43	58	44	12.38	12	1
1977	69.2	63	81.6	46	56.9	72	6.92	72	2
1976	74.6	1	90.5	1	58.9	23	2.79	93	2
1975	71.8	14	84.4	15	59.1	18	11.78	25	7
1974	71	19	85.5	11	56.7	75	4.29	91	1
1973	72.6	10	86	10	59.3	17	5.29	86	0
1972	71	19	83.2	26	58.8	25	7.47	66	0
1971	70.8	23	84	18	57.5	56	11.28	28	0
1970	72.7	9	86.2	9	59.1	18	6.19	82	1
1969	68.9	72	82	40	56.1	84	5.17	87	3
1968	69.4	59	82.5	32	56.2	82	6.44	79	0
1967	68.5	76	81.6	46	55.7	87	11.05	33	7
1966	70.3	35	82.4	34	58.2	41	9.99	43	0
1965	69	68	80.7	63	57.3	61	7.55	63	0
1964	70.5	29	83.1	28	57.8	50	11.70	27	0
1963	71	19	82.4	34	59.5	14	10.21	38	0
1962	69.5	54	80.6	69	58.4	36	12.01	19	0
1961	72.5	11	85.1	13	59.7	9	7.27	69	5
1960	69.9	42	82.2	37	57.6	52	9.62	44	0
1959	73.2	6	86.8	6	59.6	11	7.92	60	1
1958	67.3	87	80.6	69	54.1	90	6.39	80	3
1957	69.2	63	80.6	69	57.9	47	11.84	24	0
1956	69.2	63	81.9	43	56.4	77	8.97	50	0
1955	71.9	13	84.1	17	59.5	14	11.10	31	2
1954	69.2	63	81.1	54	57.2	64	6.51	78	1
1953	69.3	60	81	60	57.6	52	12.37	14	0
1952	70.3	35	83.7	20	57	68	4.47	90	0
1951	65.5	89	77.6	89	53.3	93	13.28	6	2
1950									47
1949	71.7	15	84.4	15	59	21	7.62	62	1
1948	68.8	74	79.8	80	57.9	47	14.28	3	0
1947	69.8	45	81.1	54	58.4	36	6.29	81	0
1946	68.2	79	79.8	80	56.8	73	10.36	37	1
1945	66.5	88	76.8	90	56.2	82	12.06	18	0
1944	68.3	78	79	83	57.5	56	12.38	12	0
1943	69.9	42	81.1	54	58.6	29	11.85	23	2
1942	67.5	86	77.8	88	57.1	67	11.96	21	0
1941	70.3	35	81.2	52	59.1	18	15.34	2	2
1940	69.8	45	82.2	37	57.3	61	8.23	56	1
1939	70.7	25	83.4	24	58	44	12.49	10	0
1938	70.7	25	83.6	21	57.9	47			1
1937	70.4	32	83.8	19	57	68	12.17	17	0
1936	73.4	4	88.2	4	58.7	27	5.01	88	0
1935	69.5	54	81.8	45	57	68	11.76	26	2
1934	72.9	7	89.3	2	56.4	77	6.69	76	0
1933			88.6	3			6.14	83	31
1932	72.4	12	86.3	7	58.6	29	10.14	41	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1976	74.6
1988	74.5
1983	74
2022	73.4
1936	73.4
1959	73.2
2021	72.9
1934	72.9
1970	72.7
1973	72.6

Coldest
Year	Mean, °F
1992	64.6
2004	65
1993	65.4
2009	65.5
1951	65.5
1945	66.5
1958	67.3
1942	67.5
1985	67.6
2014	67.7

Wettest
Year	Precipitation, in
1993	15.68
1941	15.34
1948	14.28
2025	13.70
1991	13.56
1951	13.28
2005	13.19
1986	12.95
2014	12.59
1939	12.49

Driest
Year	Precipitation, in
1976	2.79
1982	3.90
1974	4.29
1952	4.47
1987	4.81
1936	5.01
1969	5.17
1973	5.29
2012	5.99
2020	6.04

The hottest, coldest and wettest days

Hottest day: 94°F; 26 July 2026
Coldest night: 44°F; 14 June 2026
Wettest day: 2.89 in; 30 July 2026

Every month, season and year

Months

Seasons

Years

Sisseton, SD the day's answers

All-time records

Every answer in words

Summer 2026 brought 10.39 in of precipitation in Sisseton, SD, the wettest summer since 2025, 36th wettest of 93.
The hottest day of summer 2026 in Sisseton, SD: 94°F on Sunday 26 July 2026.
The coldest night of summer 2026 in Sisseton, SD: a low of 44°F on Sunday 14 June 2026.
The wettest day of summer 2026 in Sisseton, SD: 2.89 in on Thursday 30 July 2026.