North Mankato Threshold Days by Year (USC00216007)

17 fixed thresholds counted per year at North Mankato (USC00216007): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for North Mankato Thresholds

North Mankato: nights with a minimum temperature at or below 0 C (32 F) in 29 years, most in 1956 with 180.
North Mankato: nights with a minimum temperature at or below -10 C (14 F) in 29 years, most in 1978 with 99.
North Mankato: nights with a minimum temperature at or below -20 C (-4 F) in 29 years, most in 1978 with 48.
North Mankato: nights with a minimum temperature at or above 20 C (68 F) in 29 years, most in 1959 with 27.
17 fixed thresholds have at least one qualifying day at North Mankato.

Days at or above 30 C (86 F)

27 years with a qualifying day

Days per year at North Mankato with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 66 in 1976.

Days at or above 30 C (86 F) per year at North Mankato
Year	Days	Decade average
1955	60	42.6
1956	34	42.6
1957	32	42.6
1958	33	42.6
1959	54	42.6
1960	37	35.4
1961	40	35.4
1962	31	35.4
1963	40	35.4
1964	51	35.4
1965	21	35.4
1966	42	35.4
1967	23	35.4
1968	35	35.4
1969	34	35.4
1970	60	49.4
1971	42	49.4
1972	40	49.4
1973	46	49.4
1974	39	49.4
1975	57	49.4
1976	66	49.4
1977	56	49.4
1978	54	49.4
1979	34	49.4
1980	62	46
1981	30	46

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

First to last qualifying date each year at North Mankato
Year	First date	Last date
1955	1955-05-02	1955-09-18
1956	1956-05-12	1956-10-12
1957	1957-04-30	1957-09-01
1958	1958-05-10	1958-10-15
1959	1959-05-01	1959-09-08
1960	1960-04-22	1960-09-07
1961	1961-05-11	1961-09-10
1962	1962-04-24	1962-10-11
1963	1963-05-07	1963-10-06
1964	1964-04-16	1964-09-09
1965	1965-05-02	1965-08-17
1966	1966-05-26	1966-09-01
1967	1967-05-18	1967-10-01
1968	1968-04-30	1968-10-15
1969	1969-05-15	1969-10-04
1970	1970-04-26	1970-10-05
1971	1971-05-14	1971-09-30
1972	1972-05-16	1972-09-16
1973	1973-06-01	1973-09-10
1974	1974-05-20	1974-09-26
1975	1975-05-17	1975-10-13
1976	1976-06-05	1976-10-11
1977	1977-04-09	1977-09-08
1978	1978-05-19	1978-09-12
1979	1979-05-17	1979-09-04
1980	1980-04-20	1980-09-19
1981	1981-04-27	1981-09-13

Every Fixed Threshold

Fixed thresholds at North Mankato
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	27	66	1976	30
35 C (95 F): Days	24	17	1955	1
90 F (32.2 C): Days	27	39	1976	9
100 F (37.8 C): Days	5	2	1955	1
0 C (32 F): Ice days (max	27	94	1978	56
0 C (32 F): Frost days (min	29	180	1956	150
-10 C (14 F): Days with min	29	99	1978	55
-20 C (-4 F): Days with min	29	48	1978	19
-30 C (-22 F): Days with min	21	9	1979	6
20 C (68 F): Tropical nights (min	29	27	1959	28
25 C (77 F): Days with min	9	2	1955	2
10 mm (0.39 in): Days with 10 mm or more rain	29	32	1965	30
25 mm (0.98 in): Days with 25 mm or more rain	29	12	1977	8
50 mm (1.97 in): Days with 50 mm or more rain	14	3	1968	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1968	1
10 cm (3.9 in): Days with 10 cm or more snowfall	21	5	1965	2
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1966	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

Download the Data

Data for North 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).

North Mankato Threshold Days by Year (USC00216007)

Key Facts for North Mankato Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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