Gull Lake Biological STN Threshold Days by Year (USC00203504)

17 fixed thresholds counted per year at Gull Lake Biological STN (USC00203504): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Gull Lake Biological STN Thresholds

Gull Lake Biological STN: nights with a minimum temperature at or below 0 C (32 F) in 75 years, most in 1943 with 168.
Gull Lake Biological STN: nights with a minimum temperature at or below -10 C (14 F) in 75 years, most in 1978 with 61.
Gull Lake Biological STN: nights with a minimum temperature at or above 20 C (68 F) in 75 years, most in 1949 with 29.
Gull Lake Biological STN: days with a maximum temperature at or above 30 C (86 F) in 73 years, most in 1998 with 75.
17 fixed thresholds have at least one qualifying day at Gull Lake Biological STN.

Days at or above 30 C (86 F)

73 years with a qualifying day

Days per year at Gull Lake Biological STN with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 75 in 1998.

Days at or above 30 C (86 F) per year at Gull Lake Biological STN
Year	Days	Decade average
1931	64	47.4
1933	49	47.4
1934	70	47.4
1935	26	47.4
1936	60	47.4
1937	53	47.4
1938	36	47.4
1939	21	47.4
1940	14	37.9
1941	40	37.9
1942	26	37.9
1943	37	37.9
1944	56	37.9
1945	23	37.9
1946	51	37.9
1947	44	37.9
1948	41	37.9
1949	47	37.9
1950	28	35.1
1951	15	35.1
1952	44	35.1
1953	57	35.1
1954	31	35.1
1955	52	35.1
1956	30	35.1
1957	28	35.1
1958	11	35.1
1959	55	35.1
1960	27	31.8
1961	35	31.8
1962	35	31.8
1963	37	31.8
1964	53	31.8
1965	32	31.8
1966	29	31.8
1967	12	31.8
1968	30	31.8
1969	28	31.8
1970	31	29.4
1971	32	29.4
1972	28	29.4
1973	17	29.4
1974	29	29.4
1975	37	29.4
1976	37	29.4
1977	40	29.4
1978	29	29.4
1979	14	29.4
1980	20	25.4
1981	21	25.4
1982	17	25.4
1983	57	25.4
1984	38	25.4
1985	13	25.4
1986	14	25.4
1989	23	25.4
1990	19	42.9
1991	47	42.9
1992	16	42.9
1993	35	42.9
1994	35	42.9
1995	52	42.9
1996	42	42.9
1997	40	42.9
1998	75	42.9
1999	68	42.9
2000	25	44
2001	46	44
2002	65	44
2003	41	44
2004	39	44
2008	48	44
2026	23	23

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

First to last qualifying date each year at Gull Lake Biological STN
Year	First date	Last date
1931	1931-05-18	1931-09-22
1933	1933-06-06	1933-08-26
1934	1934-05-19	1934-10-17
1935	1935-07-04	1935-09-18
1936	1936-05-09	1936-09-15
1937	1937-05-30	1937-09-23
1938	1938-05-03	1938-10-17
1939	1939-06-06	1939-09-16
1940	1940-07-19	1940-08-17
1941	1941-05-28	1941-09-17
1942	1942-04-30	1942-08-31
1943	1943-06-12	1943-09-04
1944	1944-05-26	1944-09-03
1945	1945-06-24	1945-09-23
1946	1946-06-16	1946-09-19
1947	1947-06-10	1947-09-19
1948	1948-06-02	1948-09-19
1949	1949-05-04	1949-09-04
1950	1950-05-25	1950-08-28
1951	1951-06-01	1951-10-04
1952	1952-05-05	1952-09-14
1953	1953-05-25	1953-10-03
1954	1954-06-11	1954-09-07
1955	1955-06-05	1955-09-19
1956	1956-06-09	1956-09-13
1957	1957-06-16	1957-09-01
1958	1958-07-04	1958-08-31
1959	1959-05-02	1959-09-21
1960	1960-07-11	1960-09-09
1961	1961-05-14	1961-09-11
1962	1962-05-15	1962-09-13
1963	1963-06-02	1963-10-06
1964	1964-05-03	1964-09-11
1965	1965-05-07	1965-08-16
1966	1966-06-12	1966-09-01
1967	1967-06-03	1967-09-19
1968	1968-06-06	1968-08-25
1969	1969-06-12	1969-09-06
1970	1970-06-11	1970-09-02
1971	1971-06-04	1971-10-02
1972	1972-05-21	1972-09-17
1973	1973-06-10	1973-09-05
1974	1974-05-21	1974-08-27
1975	1975-05-20	1975-08-26
1976	1976-06-07	1976-09-09
1977	1977-05-16	1977-08-31
1978	1978-05-26	1978-09-12
1979	1979-07-12	1979-08-08
1980	1980-06-25	1980-08-29
1981	1981-06-15	1981-08-25
1982	1982-05-13	1982-09-13
1983	1983-06-12	1983-09-10
1984	1984-06-09	1984-08-30
1985	1985-06-08	1985-09-08
1986	1986-07-05	1986-08-18
1989	1989-06-23	1989-08-27
1990	1990-06-13	1990-09-06
1991	1991-05-14	1991-09-15
1992	1992-05-21	1992-08-25
1993	1993-05-09	1993-08-31
1994	1994-05-21	1994-09-16
1995	1995-06-06	1995-09-06
1996	1996-05-18	1996-09-09
1997	1997-06-10	1997-10-12
1998	1998-05-14	1998-09-29
1999	1999-05-16	1999-09-19
2000	2000-05-06	2000-09-02
2001	2001-05-17	2001-09-08
2002	2002-04-15	2002-10-01
2003	2003-06-18	2003-09-08
2004	2004-04-19	2004-09-23
2008	2008-06-02	2008-09-04
2026	2026-05-18	2026-08-11

Every Fixed Threshold

Fixed thresholds at Gull Lake Biological STN
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	73	75	1998	23
35 C (95 F): Days	42	22	1934	3
40 C (104 F): Days	3	4	1934	1
90 F (32.2 C): Days	69	50	1934	8
100 F (37.8 C): Days	13	11	1934	2
0 C (32 F): Ice days (max	73	80	1940	20
0 C (32 F): Frost days (min	75	168	1943	65
-10 C (14 F): Days with min	75	61	1978	17
-20 C (-4 F): Days with min	59	18	1963	3
20 C (68 F): Tropical nights (min	75	29	1949	10
25 C (77 F): Days with min	12	2	2008	2
10 mm (0.39 in): Days with 10 mm or more rain	72	47	2004	18
25 mm (0.98 in): Days with 25 mm or more rain	72	14	1985	4
50 mm (1.97 in): Days with 50 mm or more rain	43	4	1975	1
100 mm (3.94 in): Days with 100 mm or more rain	3	2	2008	2
10 cm (3.9 in): Days with 10 cm or more snowfall	56	9	1962	1
25 cm (9.8 in): Days with 25 cm or more snowfall	4	2	1967	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1931.

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Data for Gull Lake Biological STN 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Gull Lake Biological STN Threshold Days by Year (USC00203504)

Key Facts for Gull Lake Biological STN Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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