Waterville Trtmt Plt Threshold Days by Year (USC00179151)

17 fixed thresholds counted per year at Waterville Trtmt Plt (USC00179151): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Waterville Trtmt Plt Thresholds

Waterville Trtmt Plt: nights with a minimum temperature at or below 0 C (32 F) in 68 years, most in 1980 with 191.
Waterville Trtmt Plt: nights with a minimum temperature at or below -10 C (14 F) in 68 years, most in 1989 with 95.
Waterville Trtmt Plt: days with a maximum temperature at or above 30 C (86 F) in 67 years, most in 1983 with 41.
Waterville Trtmt Plt: days with a maximum temperature at or below 0 C (32 F) in 67 years, most in 2003 with 74.
17 fixed thresholds have at least one qualifying day at Waterville Trtmt Plt.

Days at or above 30 C (86 F)

67 years with a qualifying day

Days per year at Waterville Trtmt Plt with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 41 in 1983.

Days at or above 30 C (86 F) per year at Waterville Trtmt Plt
Year	Days	Decade average
1959	32	32
1960	14	16.7
1961	25	16.7
1962	10	16.7
1963	17	16.7
1965	23	16.7
1966	18	16.7
1967	10	16.7
1968	13	16.7
1969	20	16.7
1970	25	23.6
1971	17	23.6
1972	19	23.6
1973	32	23.6
1974	14	23.6
1975	20	23.6
1976	20	23.6
1977	24	23.6
1978	34	23.6
1979	31	23.6
1980	26	22.1
1981	13	22.1
1982	18	22.1
1983	41	22.1
1984	21	22.1
1985	16	22.1
1986	12	22.1
1987	15	22.1
1988	37	22.1
1989	22	22.1
1990	23	20.2
1991	40	20.2
1992	14	20.2
1993	21	20.2
1994	14	20.2
1995	20	20.2
1996	7	20.2
1997	17	20.2
1998	19	20.2
1999	27	20.2
2000	6	14.5
2001	33	14.5
2002	23	14.5
2003	11	14.5
2004	4	14.5
2005	21	14.5
2006	11	14.5
2007	20	14.5
2008	7	14.5
2009	9	14.5
2010	21	16
2011	12	16
2012	15	16
2013	18	16
2014	9	16
2015	14	16
2016	20	16
2017	15	16
2018	24	16
2019	12	16
2020	24	21.3
2021	14	21.3
2022	25	21.3
2023	15	21.3
2024	23	21.3
2025	27	21.3
2026	21	21.3

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

First to last qualifying date each year at Waterville Trtmt Plt
Year	First date	Last date
1959	1959-05-22	1959-09-08
1960	1960-06-26	1960-09-09
1961	1961-05-14	1961-09-27
1962	1962-05-19	1962-07-09
1963	1963-06-04	1963-07-28
1965	1965-06-08	1965-09-23
1966	1966-05-24	1966-08-30
1967	1967-06-03	1967-08-18
1968	1968-06-06	1968-08-25
1969	1969-05-17	1969-09-02
1970	1970-06-02	1970-09-22
1971	1971-06-18	1971-09-08
1972	1972-05-23	1972-09-01
1973	1973-04-22	1973-09-03
1974	1974-06-05	1974-08-22
1975	1975-05-20	1975-08-14
1976	1976-04-18	1976-08-23
1977	1977-05-17	1977-08-30
1978	1978-05-28	1978-09-21
1979	1979-05-09	1979-09-03
1980	1980-06-24	1980-09-02
1981	1981-05-25	1981-08-12
1982	1982-05-27	1982-08-17
1983	1983-06-12	1983-09-21
1984	1984-06-08	1984-08-16
1985	1985-07-04	1985-09-21
1986	1986-05-19	1986-07-26
1987	1987-05-31	1987-08-20
1988	1988-05-28	1988-08-14
1989	1989-05-18	1989-09-11
1990	1990-04-27	1990-08-28
1991	1991-05-23	1991-09-18
1992	1992-05-21	1992-09-18
1993	1993-06-15	1993-09-16
1994	1994-06-18	1994-08-05
1995	1995-06-02	1995-08-22
1996	1996-06-12	1996-09-06
1997	1997-06-11	1997-08-17
1998	1998-05-30	1998-09-07
1999	1999-05-31	1999-09-05
2000	2000-06-18	2000-09-02
2001	2001-05-04	2001-09-10
2002	2002-06-28	2002-09-11
2003	2003-05-21	2003-08-23
2004	2004-05-16	2004-08-29
2005	2005-06-05	2005-08-14
2006	2006-05-30	2006-08-03
2007	2007-05-11	2007-09-27
2008	2008-06-09	2008-09-05
2009	2009-04-29	2009-08-20
2010	2010-05-26	2010-09-04
2011	2011-06-10	2011-08-20
2012	2012-06-21	2012-08-10
2013	2013-06-01	2013-09-12
2014	2014-06-09	2014-08-28
2015	2015-05-11	2015-09-18
2016	2016-05-29	2016-09-10
2017	2017-05-19	2017-09-28
2018	2018-05-03	2018-09-06
2019	2019-06-11	2019-08-01
2020	2020-05-23	2020-08-26
2021	2021-05-27	2021-08-27
2022	2022-05-15	2022-08-31
2023	2023-05-29	2023-09-09
2024	2024-05-23	2024-09-18
2025	2025-06-05	2025-08-24
2026	2026-05-20	2026-08-10

Every Fixed Threshold

Fixed thresholds at Waterville Trtmt Plt
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	67	41	1983	21
35 C (95 F): Days	28	5	1977	3
90 F (32.2 C): Days	66	22	1988	7
100 F (37.8 C): Days	1	2	1975	2
0 C (32 F): Ice days (max	67	74	2003	36
0 C (32 F): Frost days (min	68	191	1980	96
-10 C (14 F): Days with min	68	95	1989	52
-20 C (-4 F): Days with min	66	33	1994	7
-30 C (-22 F): Days with min	18	5	1994	3
20 C (68 F): Tropical nights (min	52	12	2024	8
10 mm (0.39 in): Days with 10 mm or more rain	67	53	1973	24
25 mm (0.98 in): Days with 25 mm or more rain	67	22	1990	3
50 mm (1.97 in): Days with 50 mm or more rain	47	8	1990	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1999	1
10 cm (3.9 in): Days with 10 cm or more snowfall	56	11	1966	3
25 cm (9.8 in): Days with 25 cm or more snowfall	31	4	2008	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	2017	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1959.

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Data for Waterville Trtmt Plt 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).

Waterville Trtmt Plt Threshold Days by Year (USC00179151)

Key Facts for Waterville Trtmt Plt Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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