Waterville Threshold Days by Year (USC00459012)

16 fixed thresholds counted per year at Waterville (USC00459012): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Waterville Thresholds

Waterville: nights with a minimum temperature at or below 0 C (32 F) in 106 years, most in 1964 with 192.
Waterville: nights with a minimum temperature at or below -10 C (14 F) in 106 years, most in 1897 with 77.
Waterville: days with 10 mm (0.39 in) or more of precipitation in 104 years, most in 1948 with 24.
Waterville: days with a maximum temperature at or above 30 C (86 F) in 100 years, most in 1994 with 53.
16 fixed thresholds have at least one qualifying day at Waterville.

Days at or above 30 C (86 F)

100 years with a qualifying day

Days per year at Waterville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 53 in 1994.

Days at or above 30 C (86 F) per year at Waterville
Year	Days	Decade average
1893	33	36.2
1894	49	36.2
1896	41	36.2
1897	34	36.2
1899	24	36.2
1900	27	31.5
1901	41	31.5
1902	35	31.5
1903	32	31.5
1904	37	31.5
1905	24	31.5
1906	39	31.5
1907	17	31.5
1911	34	27.9
1912	24	27.9
1915	31	27.9
1916	18	27.9
1917	35	27.9
1918	25	27.9
1919	28	27.9
1920	37	33.6
1921	24	33.6
1922	44	33.6
1923	39	33.6
1924	39	33.6
1925	37	33.6
1927	28	33.6
1928	30	33.6
1929	24	33.6
1930	21	24.5
1931	33	24.5
1932	19	24.5
1933	23	24.5
1934	32	24.5
1935	29	24.5
1936	27	24.5
1937	14	24.5
1938	22	24.5
1939	25	24.5
1940	15	11.4
1941	12	11.4
1942	22	11.4
1943	9	11.4
1944	11	11.4
1945	12	11.4
1946	11	11.4
1947	5	11.4
1948	2	11.4
1949	15	11.4
1950	13	22.6
1951	9	22.6
1952	18	22.6
1953	20	22.6
1954	12	22.6
1955	31	22.6
1956	31	22.6
1957	16	22.6
1958	52	22.6
1959	24	22.6
1960	32	27.9
1961	28	27.9
1962	15	27.9
1964	14	27.9
1965	30	27.9
1966	22	27.9
1967	51	27.9
1968	28	27.9
1969	31	27.9
1970	47	34.4
1971	39	34.4
1972	31	34.4
1973	40	34.4
1974	39	34.4
1975	26	34.4
1976	14	34.4
1977	42	34.4
1978	32	34.4
1980	18	32.6
1981	37	32.6
1982	31	32.6
1983	22	32.6
1984	29	32.6
1985	40	32.6
1986	51	32.6
1993	7	30.7
1994	53	30.7
1995	32	30.7
2003	22	34.3
2004	48	34.3
2005	25	34.3
2006	41	34.3
2007	31	34.3
2009	39	34.3
2011	22	34.1
2012	34	34.1
2013	28	34.1
2014	40	34.1
2015	47	34.1
2016	28	34.1
2017	40	34.1

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

First to last qualifying date each year at Waterville
Year	First date	Last date
1893	1893-07-16	1893-09-06
1894	1894-05-24	1894-09-08
1896	1896-06-25	1896-09-06
1897	1897-05-12	1897-08-30
1899	1899-07-01	1899-09-11
1900	1900-05-02	1900-08-19
1901	1901-05-24	1901-08-31
1902	1902-05-26	1902-09-09
1903	1903-05-30	1903-08-18
1904	1904-06-28	1904-09-07
1905	1905-06-11	1905-08-26
1906	1906-05-09	1906-08-30
1907	1907-06-26	1907-09-30
1911	1911-05-31	1911-09-02
1912	1912-06-07	1912-09-12
1915	1915-06-30	1915-08-29
1916	1916-06-15	1916-09-01
1917	1917-06-15	1917-09-20
1918	1918-06-06	1918-09-19
1919	1919-07-04	1919-08-26
1920	1920-06-21	1920-09-03
1921	1921-06-23	1921-08-29
1922	1922-06-01	1922-09-12
1923	1923-06-28	1923-09-13
1924	1924-05-11	1924-09-15
1925	1925-06-20	1925-09-03
1927	1927-06-05	1927-08-23
1928	1928-05-25	1928-09-05
1929	1929-07-01	1929-09-13
1930	1930-07-09	1930-09-05
1931	1931-05-13	1931-08-25
1932	1932-06-13	1932-09-08
1933	1933-06-14	1933-08-24
1934	1934-05-28	1934-09-06
1935	1935-06-05	1935-09-11
1936	1936-05-26	1936-08-21
1937	1937-06-03	1937-09-16
1938	1938-06-22	1938-09-17
1939	1939-06-29	1939-08-25
1940	1940-06-12	1940-09-12
1941	1941-07-07	1941-08-22
1942	1942-07-01	1942-08-24
1943	1943-07-20	1943-08-17
1944	1944-07-19	1944-09-13
1945	1945-07-08	1945-08-16
1946	1946-05-08	1946-08-24
1947	1947-07-15	1947-08-03
1948	1948-06-28	1948-06-29
1949	1949-05-12	1949-09-02
1950	1950-07-04	1950-09-04
1951	1951-07-14	1951-08-22
1952	1952-07-08	1952-09-20
1953	1953-07-06	1953-09-12
1954	1954-05-18	1954-08-01
1955	1955-06-10	1955-09-06
1956	1956-05-17	1956-08-22
1957	1957-05-31	1957-09-15
1958	1958-05-21	1958-09-07
1959	1959-07-05	1959-08-09
1960	1960-07-05	1960-09-14
1961	1961-06-03	1961-08-29
1962	1962-07-20	1962-08-20
1964	1964-07-07	1964-08-23
1965	1965-06-09	1965-08-19
1966	1966-05-05	1966-09-23
1967	1967-06-16	1967-09-22
1968	1968-06-19	1968-09-11
1969	1969-06-03	1969-09-13
1970	1970-06-03	1970-09-01
1971	1971-06-23	1971-08-30
1972	1972-05-29	1972-09-04
1973	1973-05-15	1973-09-12
1974	1974-06-12	1974-09-26
1975	1975-07-03	1975-09-16
1976	1976-06-29	1976-09-02
1977	1977-04-24	1977-08-21
1978	1978-06-03	1978-08-10
1980	1980-07-08	1980-08-13
1981	1981-06-25	1981-09-19
1982	1982-06-16	1982-09-02
1983	1983-05-24	1983-08-17
1984	1984-05-29	1984-08-27
1985	1985-06-18	1985-08-27
1986	1986-05-28	1986-09-05
1993	1993-08-05	1993-09-11
1994	1994-05-07	1994-09-28
1995	1995-05-29	1995-09-17
2003	2003-06-07	2003-09-05
2004	2004-06-04	2004-08-31
2005	2005-05-28	2005-08-28
2006	2006-05-16	2006-09-05
2007	2007-06-01	2007-09-12
2009	2009-05-29	2009-09-23
2011	2011-07-05	2011-09-14
2012	2012-07-07	2012-09-22
2013	2013-07-01	2013-09-15
2014	2014-06-24	2014-08-29
2015	2015-05-29	2015-09-13
2016	2016-06-05	2016-08-30
2017	2017-06-26	2017-09-07

Every Fixed Threshold

Fixed thresholds at Waterville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	100	53	1994	40
35 C (95 F): Days	81	20	2004	3
40 C (104 F): Days	5	2	1994	2
90 F (32.2 C): Days	97	38	2004	17
100 F (37.8 C): Days	28	4	1897	3
0 C (32 F): Ice days (max	100	85	1985	66
0 C (32 F): Frost days (min	106	192	1964	172
-10 C (14 F): Days with min	106	77	1897	45
-20 C (-4 F): Days with min	76	22	1950	3
-30 C (-22 F): Days with min	7	3	1893	1
20 C (68 F): Tropical nights (min	49	8	2004	2
10 mm (0.39 in): Days with 10 mm or more rain	104	24	1948	10
25 mm (0.98 in): Days with 25 mm or more rain	46	3	1912	1
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1948	1
10 cm (3.9 in): Days with 10 cm or more snowfall	52	9	1902	5
25 cm (9.8 in): Days with 25 cm or more snowfall	8	3	1971	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Waterville 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).

Waterville Threshold Days by Year (USC00459012)

Key Facts for Waterville Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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