Swan Falls Ph Threshold Days by Year

16 fixed thresholds counted per year at Swan Falls Ph (USC00108928): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Swan Falls Ph Thresholds

Swan Falls Ph: nights with a minimum temperature at or below 0 C (32 F) in 86 years, most in 1985 with 139.
Swan Falls Ph: nights with a minimum temperature at or above 20 C (68 F) in 86 years, most in 2021 with 43.
Swan Falls Ph: days with a maximum temperature at or above 30 C (86 F) in 83 years, most in 1988 with 119.
Swan Falls Ph: days with a maximum temperature at or above 35 C (95 F) in 83 years, most in 1967 with 70.
16 fixed thresholds have at least one qualifying day at Swan Falls Ph.

Days at or above 30 C (86 F)

83 years with a qualifying day

Days per year at Swan Falls Ph with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 119 in 1988.

Days at or above 30 C (86 F) per year at Swan Falls Ph
Year	Days	Decade average
1936	99	90.3
1937	86	90.3
1938	84	90.3
1939	92	90.3
1940	96	84.8
1941	68	84.8
1942	81	84.8
1943	81	84.8
1944	81	84.8
1945	78	84.8
1946	90	84.8
1947	86	84.8
1948	81	84.8
1949	106	84.8
1950	86	95.4
1951	92	95.4
1952	108	95.4
1953	89	95.4
1954	91	95.4
1955	86	95.4
1956	101	95.4
1957	105	95.4
1958	104	95.4
1959	92	95.4
1960	110	98.4
1961	102	98.4
1962	99	98.4
1963	102	98.4
1964	84	98.4
1965	77	98.4
1966	102	98.4
1967	111	98.4
1968	87	98.4
1969	110	98.4
1970	91	93.6
1971	88	93.6
1972	99	93.6
1973	99	93.6
1974	104	93.6
1975	89	93.6
1976	80	93.6
1977	94	93.6
1978	83	93.6
1979	109	93.6
1980	91	98.2
1981	98	98.2
1983	87	98.2
1984	86	98.2
1985	93	98.2
1986	97	98.2
1987	106	98.2
1988	119	98.2
1989	107	98.2
1990	96	90.4
1991	95	90.4
1992	107	90.4
1993	73	90.4
1994	111	90.4
1995	79	90.4
1999	72	90.4
2001	88	84.9
2003	98	84.9
2004	79	84.9
2005	75	84.9
2006	88	84.9
2008	82	84.9
2009	84	84.9
2010	60	83
2011	76	83
2012	89	83
2013	93	83
2015	85	83
2016	88	83
2017	98	83
2018	77	83
2019	81	83
2020	95	84.3
2021	91	84.3
2022	95	84.3
2023	70	84.3
2024	79	84.3
2025	87	84.3
2026	73	84.3

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

First to last qualifying date each year at Swan Falls Ph
Year	First date	Last date
1936	1936-04-13	1936-09-25
1937	1937-05-14	1937-09-19
1938	1938-05-24	1938-09-27
1939	1939-04-22	1939-09-25
1940	1940-05-10	1940-09-13
1941	1941-05-11	1941-09-19
1942	1942-04-21	1942-10-10
1943	1943-05-27	1943-10-09
1944	1944-05-06	1944-10-13
1945	1945-05-03	1945-10-16
1946	1946-04-17	1946-10-01
1947	1947-05-02	1947-10-05
1948	1948-05-16	1948-10-14
1949	1949-04-12	1949-09-27
1950	1950-05-22	1950-10-14
1951	1951-05-10	1951-09-25
1952	1952-04-24	1952-10-10
1953	1953-04-21	1953-10-09
1954	1954-05-04	1954-09-28
1955	1955-05-19	1955-10-09
1956	1956-04-21	1956-10-02
1957	1957-05-26	1957-10-01
1958	1958-05-05	1958-10-14
1959	1959-04-05	1959-09-13
1960	1960-04-05	1960-10-05
1961	1961-05-09	1961-10-05
1962	1962-04-14	1962-09-26
1963	1963-05-18	1963-10-03
1964	1964-05-12	1964-09-24
1965	1965-05-16	1965-10-09
1966	1966-04-02	1966-09-24
1967	1967-05-08	1967-09-29
1968	1968-04-29	1968-09-18
1969	1969-04-22	1969-09-29
1970	1970-05-03	1970-10-03
1971	1971-05-01	1971-09-13
1972	1972-05-13	1972-09-18
1973	1973-05-12	1973-09-14
1974	1974-05-25	1974-09-26
1975	1975-05-14	1975-10-06
1976	1976-05-09	1976-09-30
1977	1977-04-22	1977-09-14
1978	1978-05-21	1978-09-30
1979	1979-05-15	1979-10-09
1980	1980-04-17	1980-10-08
1981	1981-05-29	1981-09-19
1983	1983-05-23	1983-10-06
1984	1984-04-16	1984-10-09
1985	1985-04-14	1985-09-05
1986	1986-04-22	1986-09-08
1987	1987-05-05	1987-10-03
1988	1988-04-02	1988-10-11
1989	1989-04-19	1989-10-12
1990	1990-04-15	1990-10-05
1991	1991-04-22	1991-10-16
1992	1992-04-26	1992-10-01
1993	1993-05-11	1993-10-04
1994	1994-04-17	1994-09-28
1995	1995-05-20	1995-09-18
1999	1999-05-22	1999-09-23
2001	2001-04-25	2001-10-01
2003	2003-05-22	2003-10-08
2004	2004-04-27	2004-10-08
2005	2005-05-28	2005-10-02
2006	2006-05-14	2006-09-13
2008	2008-05-16	2008-10-02
2009	2009-04-21	2009-09-28
2010	2010-06-14	2010-10-04
2011	2011-06-22	2011-10-04
2012	2012-04-23	2012-09-21
2013	2013-05-10	2013-09-17
2015	2015-05-05	2015-10-11
2016	2016-04-21	2016-10-10
2017	2017-05-11	2017-09-14
2018	2018-04-28	2018-09-10
2019	2019-05-13	2019-09-16
2020	2020-04-30	2020-10-07
2021	2021-05-01	2021-10-05
2022	2022-05-26	2022-10-07
2023	2023-05-01	2023-09-18
2024	2024-05-17	2024-10-05
2025	2025-05-10	2025-09-29
2026	2026-05-11	2026-10-05

Every Fixed Threshold

Fixed thresholds at Swan Falls Ph
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	83	119	1988	73
35 C (95 F): Days	83	70	1967	37
40 C (104 F): Days	77	19	1961	2
45 C (113 F): Days	1	2	1990	2
90 F (32.2 C): Days	83	97	1988	59
100 F (37.8 C): Days	83	43	1961	11
110 F (43.3 C): Days	16	4	1990	2
0 C (32 F): Ice days (max	80	45	1985	4
0 C (32 F): Frost days (min	86	139	1985	48
-10 C (14 F): Days with min	78	52	1985	8
-20 C (-4 F): Days with min	13	6	1937	2
20 C (68 F): Tropical nights (min	86	43	2021	34
25 C (77 F): Days with min	27	7	2015	1
10 mm (0.39 in): Days with 10 mm or more rain	82	8	1941	1
25 mm (0.98 in): Days with 25 mm or more rain	15	2	1981	1
10 cm (3.9 in): Days with 10 cm or more snowfall	8	2	1951	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1936.

Download the Data

Data for Swan Falls Ph 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).

Swan Falls Ph Threshold Days by Year

Key Facts for Swan Falls Ph Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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