Francis Threshold Days by Year (CA004012720)

18 fixed thresholds counted per year at Francis (CA004012720): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Francis Thresholds

Francis: days with a maximum temperature at or above 30 C (86 F) in 51 years, most in 1936 with 38.
Francis: days with a maximum temperature at or below 0 C (32 F) in 51 years, most in 1935 with 143.
Francis: days with a maximum temperature at or above 90 F (32.2 C) in 49 years, most in 1936 with 25.
Francis: nights with a minimum temperature at or below 0 C (32 F) in 49 years, most in 1965 with 240.
18 fixed thresholds have at least one qualifying day at Francis.

Days at or above 30 C (86 F)

51 years with a qualifying day

Days per year at Francis with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 38 in 1936.

Days at or above 30 C (86 F) per year at Francis
Year	Days	Decade average
1924	9	14.7
1925	17	14.7
1926	13	14.7
1927	8	14.7
1928	11	14.7
1929	30	14.7
1930	25	26.5
1931	29	26.5
1932	20	26.5
1933	28	26.5
1934	31	26.5
1935	8	26.5
1936	38	26.5
1937	33	26.5
1938	26	26.5
1939	27	26.5
1940	30	14.8
1941	18	14.8
1942	8	14.8
1943	5	14.8
1944	4	14.8
1945	12	14.8
1946	16	14.8
1947	19	14.8
1948	21	14.8
1954	2	14.3
1955	17	14.3
1956	11	14.3
1957	15	14.3
1958	17	14.3
1959	24	14.3
1960	21	17.4
1962	8	17.4
1963	13	17.4
1964	16	17.4
1965	8	17.4
1966	20	17.4
1967	28	17.4
1969	25	17.4
1970	24	17.2
1971	19	17.2
1972	17	17.2
1973	22	17.2
1974	13	17.2
1975	20	17.2
1976	4	17.2
1977	7	17.2
1978	20	17.2
1979	26	17.2
1980	34	28.5
1981	23	28.5

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

First to last qualifying date each year at Francis
Year	First date	Last date
1924	1924-07-05	1924-09-02
1925	1925-05-19	1925-09-02
1926	1926-06-27	1926-08-26
1927	1927-07-24	1927-09-07
1928	1928-05-06	1928-09-18
1929	1929-06-09	1929-09-01
1930	1930-05-03	1930-08-30
1931	1931-05-13	1931-09-06
1932	1932-05-12	1932-09-08
1933	1933-06-03	1933-09-04
1934	1934-05-08	1934-10-12
1935	1935-07-03	1935-08-14
1936	1936-05-15	1936-09-03
1937	1937-05-28	1937-08-27
1938	1938-06-17	1938-09-22
1939	1939-04-29	1939-09-21
1940	1940-05-11	1940-09-04
1941	1941-05-24	1941-09-18
1942	1942-04-22	1942-09-09
1943	1943-07-07	1943-10-04
1944	1944-07-01	1944-07-29
1945	1945-06-21	1945-09-04
1946	1946-06-21	1946-09-16
1947	1947-07-02	1947-08-04
1948	1948-05-18	1948-09-11
1954	1954-07-20	1954-08-30
1955	1955-06-15	1955-09-02
1956	1956-05-21	1956-09-26
1957	1957-05-29	1957-08-24
1958	1958-05-12	1958-09-01
1959	1959-06-03	1959-08-28
1960	1960-05-12	1960-09-03
1962	1962-06-25	1962-08-21
1963	1963-05-30	1963-10-03
1964	1964-05-17	1964-10-13
1965	1965-07-03	1965-08-23
1966	1966-05-21	1966-09-11
1967	1967-06-27	1967-09-10
1969	1969-05-26	1969-09-13
1970	1970-06-03	1970-09-04
1971	1971-05-13	1971-09-11
1972	1972-05-17	1972-08-30
1973	1973-06-23	1973-08-30
1974	1974-06-19	1974-08-06
1975	1975-06-24	1975-09-25
1976	1976-07-26	1976-09-06
1977	1977-04-29	1977-07-23
1978	1978-05-22	1978-09-05
1979	1979-06-11	1979-09-16
1980	1980-04-20	1980-09-07
1981	1981-05-20	1981-09-12

Every Fixed Threshold

Fixed thresholds at Francis
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	51	38	1936	23
35 C (95 F): Days	41	10	1931	3
40 C (104 F): Days	2	1	1937	1
90 F (32.2 C): Days	49	25	1936	9
100 F (37.8 C): Days	9	4	1936	1
110 F (43.3 C): Days	1	1	1937	1
0 C (32 F): Ice days (max	51	143	1935	83
0 C (32 F): Frost days (min	49	240	1965	197
-10 C (14 F): Days with min	49	154	1948	89
-20 C (-4 F): Days with min	49	93	1978	37
-30 C (-22 F): Days with min	49	40	1978	9
-40 C (-40 F): Days with min	26	5	1972	2
20 C (68 F): Tropical nights (min	6	3	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	48	22	1933	10
25 mm (0.98 in): Days with 25 mm or more rain	41	5	1935	4
50 mm (1.97 in): Days with 50 mm or more rain	8	2	1970	1
10 cm (3.9 in): Days with 10 cm or more snowfall	34	5	1925	2
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1925	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1924.

Download the Data

Data for Francis 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Francis Threshold Days by Year (CA004012720)

Key Facts for Francis Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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