Mt Sunapee Threshold Days by Year (USC00275629)

17 fixed thresholds counted per year at Mt Sunapee (USC00275629): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mt Sunapee Thresholds

Mt Sunapee: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 2005 with 54.
Mt Sunapee: days with 25 mm (0.98 in) or more of precipitation in 52 years, most in 2006 with 22.
Mt Sunapee: nights with a minimum temperature at or below 0 C (32 F) in 50 years, most in 1965 with 184.
Mt Sunapee: nights with a minimum temperature at or below -10 C (14 F) in 50 years, most in 1978 with 77.
17 fixed thresholds have at least one qualifying day at Mt Sunapee.

Days at or above 30 C (86 F)

47 years with a qualifying day

Days per year at Mt Sunapee with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 1988.

Days at or above 30 C (86 F) per year at Mt Sunapee
Year	Days	Decade average
1958	3	4.5
1959	6	4.5
1961	1	7
1962	1	7
1963	16	7
1964	11	7
1965	8	7
1966	6	7
1967	3	7
1968	10	7
1969	7	7
1970	12	8.2
1971	5	8.2
1972	5	8.2
1973	11	8.2
1975	8	8.2
1976	8	8.2
1977	7	8.2
1978	11	8.2
1979	7	8.2
1980	9	11.6
1981	4	11.6
1987	12	11.6
1988	26	11.6
1989	7	11.6
1990	3	9.6
1991	10	9.6
1992	5	9.6
1993	10	9.6
1994	8	9.6
1995	19	9.6
1996	3	9.6
1997	10	9.6
1998	6	9.6
1999	22	9.6
2003	11	8.7
2004	2	8.7
2005	16	8.7
2006	10	8.7
2007	9	8.7
2008	7	8.7
2009	6	8.7
2010	17	13
2011	11	13
2012	18	13
2013	15	13
2014	4	13

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

First to last qualifying date each year at Mt Sunapee
Year	First date	Last date
1958	1958-07-01	1958-08-03
1959	1959-06-10	1959-08-17
1961	1961-07-24	1961-07-24
1962	1962-05-19	1962-05-19
1963	1963-06-25	1963-07-30
1964	1964-05-24	1964-07-29
1965	1965-06-08	1965-09-23
1966	1966-06-27	1966-08-07
1967	1967-06-12	1967-08-22
1968	1968-06-06	1968-08-25
1969	1969-06-13	1969-08-24
1970	1970-07-24	1970-09-22
1971	1971-06-07	1971-07-09
1972	1972-07-12	1972-08-25
1973	1973-06-11	1973-09-03
1975	1975-05-20	1975-08-03
1976	1976-04-18	1976-08-22
1977	1977-05-22	1977-08-29
1978	1978-05-27	1978-08-15
1979	1979-05-09	1979-07-23
1980	1980-06-25	1980-08-09
1981	1981-06-16	1981-07-09
1987	1987-05-30	1987-08-18
1988	1988-06-13	1988-08-15
1989	1989-05-20	1989-09-10
1990	1990-07-05	1990-08-05
1991	1991-06-27	1991-08-30
1992	1992-05-21	1992-08-27
1993	1993-06-18	1993-08-27
1994	1994-06-17	1994-07-23
1995	1995-06-18	1995-08-17
1996	1996-08-06	1996-08-08
1997	1997-06-10	1997-08-16
1998	1998-05-29	1998-07-22
1999	1999-05-31	1999-09-04
2003	2003-06-24	2003-07-09
2004	2004-04-20	2004-06-10
2005	2005-06-09	2005-08-22
2006	2006-06-19	2006-08-03
2007	2007-05-26	2007-09-08
2008	2008-06-08	2008-07-20
2009	2009-04-26	2009-08-19
2010	2010-05-26	2010-09-04
2011	2011-05-28	2011-07-24
2012	2012-04-16	2012-08-06
2013	2013-06-01	2013-09-12
2014	2014-07-02	2014-07-24

Every Fixed Threshold

Fixed thresholds at Mt Sunapee
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	47	26	1988	4
35 C (95 F): Days	1	1	1988	1
90 F (32.2 C): Days	25	8	1963	3
0 C (32 F): Ice days (max	48	81	1978	67
0 C (32 F): Frost days (min	50	184	1965	145
-10 C (14 F): Days with min	50	77	1978	61
-20 C (-4 F): Days with min	49	17	1968	9
-30 C (-22 F): Days with min	2	6	1968	1
20 C (68 F): Tropical nights (min	48	16	1988	4
25 C (77 F): Days with min	2	1	1998	1
10 mm (0.39 in): Days with 10 mm or more rain	52	54	2005	46
25 mm (0.98 in): Days with 25 mm or more rain	52	22	2006	14
50 mm (1.97 in): Days with 50 mm or more rain	42	7	1996	2
100 mm (3.94 in): Days with 100 mm or more rain	5	1	1960	1
10 cm (3.9 in): Days with 10 cm or more snowfall	45	18	1971	7
25 cm (9.8 in): Days with 25 cm or more snowfall	37	5	1972	3
50 cm (19.7 in): Days with 50 cm or more snowfall	2	1	1969	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1958.

Download the Data

Data for Mt Sunapee 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).

Mt Sunapee Threshold Days by Year (USC00275629)

Key Facts for Mt Sunapee Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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