Pettibone Threshold Days by Year (USC00327047)

21 fixed thresholds counted per year at Pettibone (USC00327047): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Pettibone Thresholds

Pettibone: days with 10 mm (0.39 in) or more of precipitation in 64 years, most in 1994 with 24.
Pettibone: nights with a minimum temperature at or below 0 C (32 F) in 63 years, most in 1945 with 211.
Pettibone: nights with a minimum temperature at or below -10 C (14 F) in 63 years, most in 1950 with 124.
Pettibone: nights with a minimum temperature at or below -20 C (-4 F) in 63 years, most in 1936 with 70.
21 fixed thresholds have at least one qualifying day at Pettibone.

Days at or above 30 C (86 F)

60 years with a qualifying day

Days per year at Pettibone with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 69 in 1936.

Days at or above 30 C (86 F) per year at Pettibone
Year	Days	Decade average
1921	31	25.5
1923	17	25.5
1928	16	25.5
1929	38	25.5
1932	35	48.8
1933	49	48.8
1934	65	48.8
1935	41	48.8
1936	69	48.8
1937	49	48.8
1938	29	48.8
1939	53	48.8
1940	46	30.3
1941	33	30.3
1942	8	30.3
1943	27	30.3
1944	17	30.3
1945	31	30.3
1946	33	30.3
1947	31	30.3
1948	42	30.3
1949	35	30.3
1950	22	31.4
1951	12	31.4
1952	40	31.4
1953	31	31.4
1954	20	31.4
1955	46	31.4
1957	28	31.4
1958	37	31.4
1959	47	31.4
1960	35	30
1961	46	30
1962	14	30
1963	37	30
1964	25	30
1965	10	30
1966	30	30
1967	44	30
1968	23	30
1969	36	30
1971	20	24.5
1972	29	24.5
1980	42	40.4
1981	24	40.4
1982	36	40.4
1983	50	40.4
1984	43	40.4
1985	32	40.4
1986	25	40.4
1988	63	40.4
1989	49	40.4
1990	35	27.4
1991	37	27.4
1992	27	27.4
1993	8	27.4
1994	21	27.4
1995	30	27.4
1996	31	27.4
1997	30	27.4

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

First to last qualifying date each year at Pettibone
Year	First date	Last date
1921	1921-06-17	1921-09-01
1923	1923-06-01	1923-09-03
1928	1928-05-07	1928-08-14
1929	1929-06-09	1929-09-22
1932	1932-05-13	1932-09-09
1933	1933-05-17	1933-09-19
1934	1934-04-28	1934-10-13
1935	1935-06-13	1935-09-16
1936	1936-05-05	1936-10-08
1937	1937-05-28	1937-09-21
1938	1938-06-05	1938-10-11
1939	1939-05-05	1939-09-21
1940	1940-05-11	1940-09-19
1941	1941-05-18	1941-09-19
1942	1942-07-11	1942-09-10
1943	1943-06-18	1943-09-26
1944	1944-05-29	1944-08-12
1945	1945-06-11	1945-10-17
1946	1946-06-05	1946-09-15
1947	1947-07-03	1947-08-26
1948	1948-05-18	1948-09-18
1949	1949-04-30	1949-10-05
1950	1950-06-05	1950-10-30
1951	1951-07-13	1951-08-06
1952	1952-04-26	1952-09-27
1953	1953-06-11	1953-10-01
1954	1954-06-23	1954-09-01
1955	1955-05-02	1955-10-10
1957	1957-06-09	1957-08-13
1958	1958-05-29	1958-09-24
1959	1959-05-02	1959-09-13
1960	1960-05-13	1960-10-04
1961	1961-06-04	1961-09-08
1962	1962-04-24	1962-10-14
1963	1963-05-30	1963-10-04
1964	1964-05-20	1964-08-20
1965	1965-07-21	1965-08-16
1966	1966-05-21	1966-09-20
1967	1967-05-22	1967-09-07
1968	1968-06-02	1968-08-28
1969	1969-05-14	1969-09-12
1971	1971-07-02	1971-09-03
1972	1972-05-16	1972-09-19
1980	1980-04-20	1980-09-07
1981	1981-06-27	1981-09-12
1982	1982-05-03	1982-09-10
1983	1983-06-10	1983-09-27
1984	1984-05-16	1984-09-21
1985	1985-04-29	1985-08-09
1986	1986-05-04	1986-08-24
1988	1988-05-25	1988-08-24
1989	1989-06-06	1989-09-30
1990	1990-04-22	1990-09-12
1991	1991-06-11	1991-09-08
1992	1992-04-30	1992-10-02
1993	1993-06-20	1993-08-25
1994	1994-06-19	1994-09-10
1995	1995-06-13	1995-09-05
1996	1996-06-09	1996-09-06
1997	1997-05-31	1997-10-02

Every Fixed Threshold

Fixed thresholds at Pettibone
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	60	69	1936	30
35 C (95 F): Days	53	27	1936	6
40 C (104 F): Days	14	12	1936	3
45 C (113 F): Days	1	2	1936	2
90 F (32.2 C): Days	60	49	1988	16
100 F (37.8 C): Days	34	16	1936	3
110 F (43.3 C): Days	1	4	1936	4
0 C (32 F): Ice days (max	60	124	1950	110
0 C (32 F): Frost days (min	63	211	1945	181
-10 C (14 F): Days with min	63	124	1950	91
-20 C (-4 F): Days with min	63	70	1936	31
-30 C (-22 F): Days with min	60	37	1936	6
-40 C (-40 F): Days with min	8	3	1936	1
20 C (68 F): Tropical nights (min	49	9	1936	1
25 C (77 F): Days with min	1	1	1988	1
10 mm (0.39 in): Days with 10 mm or more rain	64	24	1994	10
25 mm (0.98 in): Days with 25 mm or more rain	63	8	1944	2
50 mm (1.97 in): Days with 50 mm or more rain	23	3	1990	1
100 mm (3.94 in): Days with 100 mm or more rain	2	2	1994	2
10 cm (3.9 in): Days with 10 cm or more snowfall	34	8	1993	3
25 cm (9.8 in): Days with 25 cm or more snowfall	2	2	1950	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1921.

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Data for Pettibone 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).

Pettibone Threshold Days by Year (USC00327047)

Key Facts for Pettibone Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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