Mankato Threshold Days by Year (USC00144982)

19 fixed thresholds counted per year at Mankato (USC00144982): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mankato Thresholds

Mankato: days with 10 mm (0.39 in) or more of precipitation in 55 years, most in 1993 with 39.
Mankato: days with 25 mm (0.98 in) or more of precipitation in 54 years, most in 1973 with 16.
Mankato: days with 10 cm (3.9 in) or more of snowfall in 46 years, most in 1960 with 6.
Mankato: days with a maximum temperature at or above 30 C (86 F) in 44 years, most in 1959 with 101.
19 fixed thresholds have at least one qualifying day at Mankato.

Days at or above 30 C (86 F)

44 years with a qualifying day

Days per year at Mankato with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 101 in 1959.

Days at or above 30 C (86 F) per year at Mankato
Year	Days	Decade average
1893	74	74
1910	72	81.5
1911	91	81.5
1959	101	101
1960	73	70.2
1961	68	70.2
1962	72	70.2
1963	88	70.2
1964	82	70.2
1965	67	70.2
1966	79	70.2
1967	55	70.2
1968	68	70.2
1969	50	70.2
1970	89	71.8
1971	69	71.8
1972	67	71.8
1973	66	71.8
1974	56	71.8
1975	73	71.8
1976	76	71.8
1977	65	71.8
1978	80	71.8
1979	77	71.8
1980	93	69.7
1981	60	69.7
1982	38	69.7
1983	85	69.7
1984	77	69.7
1985	55	69.7
1988	80	69.7
1990	70	68.1
1991	92	68.1
1992	37	68.1
1993	55	68.1
1994	75	68.1
1995	71	68.1
1996	55	68.1
1997	71	68.1
1998	87	68.1
1999	68	68.1
2000	92	87.3
2002	98	87.3
2003	72	87.3

For each year, a bar from the first to the last day at Mankato meeting 30 C (86 F).

First to last qualifying date each year at Mankato
Year	First date	Last date
1893	1893-03-30	1893-10-09
1910	1910-03-05	1910-10-16
1911	1911-05-09	1911-09-28
1959	1959-04-30	1959-09-22
1960	1960-04-22	1960-10-01
1961	1961-04-19	1961-09-10
1962	1962-04-21	1962-10-11
1963	1963-04-15	1963-10-15
1964	1964-04-16	1964-09-09
1965	1965-04-20	1965-10-10
1966	1966-05-06	1966-10-14
1967	1967-03-24	1967-10-04
1968	1968-04-12	1968-10-15
1969	1969-05-29	1969-10-03
1970	1970-04-28	1970-09-21
1971	1971-04-01	1971-10-08
1972	1972-03-07	1972-10-02
1973	1973-05-19	1973-09-03
1974	1974-05-28	1974-09-27
1975	1975-06-14	1975-10-23
1976	1976-03-26	1976-10-12
1977	1977-05-17	1977-09-09
1978	1978-04-01	1978-10-21
1979	1979-05-17	1979-10-09
1980	1980-04-22	1980-10-14
1981	1981-04-26	1981-09-30
1982	1982-06-15	1982-09-11
1983	1983-05-25	1983-10-03
1984	1984-05-25	1984-09-24
1985	1985-04-19	1985-09-19
1988	1988-05-13	1988-09-22
1990	1990-04-22	1990-10-06
1991	1991-05-12	1991-10-17
1992	1992-04-14	1992-10-03
1993	1993-05-28	1993-10-07
1994	1994-04-18	1994-10-01
1995	1995-06-07	1995-10-17
1996	1996-04-12	1996-09-11
1997	1997-04-19	1997-10-07
1998	1998-05-14	1998-09-29
1999	1999-06-05	1999-10-28
2000	2000-04-06	2000-10-02
2002	2002-04-15	2002-10-02
2003	2003-04-15	2003-10-23

Every Fixed Threshold

Fixed thresholds at Mankato
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	44	101	1959	72
35 C (95 F): Days	43	62	2000	25
40 C (104 F): Days	29	14	2000	1
90 F (32.2 C): Days	44	82	2000	43
100 F (37.8 C): Days	39	26	2000	9
110 F (43.3 C): Days	5	2	1964	1
0 C (32 F): Ice days (max	44	67	1983	32
0 C (32 F): Frost days (min	41	167	1984	132
-10 C (14 F): Days with min	41	74	1982	42
-20 C (-4 F): Days with min	39	22	1979	3
-30 C (-22 F): Days with min	1	2	1982	2
20 C (68 F): Tropical nights (min	41	46	1983	21
25 C (77 F): Days with min	15	5	1964	1
10 mm (0.39 in): Days with 10 mm or more rain	55	39	1993	7
25 mm (0.98 in): Days with 25 mm or more rain	54	16	1973	3
50 mm (1.97 in): Days with 50 mm or more rain	37	7	1973	2
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1978	1
10 cm (3.9 in): Days with 10 cm or more snowfall	46	6	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	8	1	1968	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Mankato threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Mankato Threshold Days by Year (USC00144982)

Key Facts for Mankato Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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