Houlton AP Threshold Days by Year (USW00014609)

17 fixed thresholds counted per year at Houlton AP (USW00014609): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Houlton AP Thresholds

Houlton AP: days with a maximum temperature at or above 30 C (86 F) in 75 years, most in 1970 with 31.
Houlton AP: days with a maximum temperature at or below 0 C (32 F) in 75 years, most in 1965 with 104.
Houlton AP: nights with a minimum temperature at or below 0 C (32 F) in 75 years, most in 1978 with 213.
Houlton AP: nights with a minimum temperature at or below -10 C (14 F) in 75 years, most in 1978 with 114.
17 fixed thresholds have at least one qualifying day at Houlton AP.

Days at or above 30 C (86 F)

75 years with a qualifying day

Days per year at Houlton AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 31 in 1970.

Days at or above 30 C (86 F) per year at Houlton AP
Year	Days	Decade average
1949	20	20
1950	5	8.7
1951	7	8.7
1952	16	8.7
1953	16	8.7
1954	2	8.7
1955	13	8.7
1956	3	8.7
1957	6	8.7
1958	3	8.7
1959	16	8.7
1960	9	8.1
1961	5	8.1
1962	4	8.1
1963	15	8.1
1964	5	8.1
1965	5	8.1
1966	4	8.1
1967	6	8.1
1968	9	8.1
1969	19	8.1
1970	31	16.9
1971	12	16.9
1972	14	16.9
1973	22	16.9
1974	8	16.9
1975	18	16.9
1976	19	16.9
1977	12	16.9
1978	15	16.9
1979	18	16.9
1980	13	10.3
1981	7	10.3
1982	10	10.3
1983	9	10.3
1984	7	10.3
1988	19	10.3
1989	7	10.3
1990	10	12.2
1991	18	12.2
1992	4	12.2
1993	11	12.2
1994	7	12.2
1995	20	12.2
1996	6	12.2
1997	11	12.2
1998	8	12.2
1999	27	12.2
2000	3	7.6
2001	16	7.6
2002	15	7.6
2003	5	7.6
2004	5	7.6
2005	10	7.6
2006	5	7.6
2007	8	7.6
2008	3	7.6
2009	6	7.6
2010	18	9.4
2011	4	9.4
2012	8	9.4
2013	9	9.4
2014	10	9.4
2015	8	9.4
2016	7	9.4
2017	9	9.4
2018	12	9.4
2019	9	9.4
2020	21	12.1
2021	10	12.1
2022	12	12.1
2023	7	12.1
2024	10	12.1
2025	14	12.1
2026	11	12.1

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

First to last qualifying date each year at Houlton AP
Year	First date	Last date
1949	1949-06-03	1949-08-27
1950	1950-05-25	1950-08-09
1951	1951-05-20	1951-09-13
1952	1952-07-03	1952-08-28
1953	1953-05-10	1953-09-05
1954	1954-06-21	1954-06-22
1955	1955-05-22	1955-08-22
1956	1956-06-14	1956-08-18
1957	1957-06-11	1957-07-20
1958	1958-07-24	1958-08-06
1959	1959-05-26	1959-08-15
1960	1960-05-28	1960-09-09
1961	1961-06-13	1961-09-11
1962	1962-05-19	1962-06-30
1963	1963-06-02	1963-07-29
1964	1964-05-24	1964-07-28
1965	1965-06-20	1965-09-22
1966	1966-05-24	1966-07-03
1967	1967-06-03	1967-07-22
1968	1968-07-01	1968-09-21
1969	1969-05-17	1969-09-01
1970	1970-05-02	1970-08-17
1971	1971-06-18	1971-08-11
1972	1972-05-23	1972-07-16
1973	1973-06-21	1973-09-02
1974	1974-05-15	1974-08-22
1975	1975-06-18	1975-08-11
1976	1976-06-05	1976-08-22
1977	1977-05-22	1977-08-29
1978	1978-05-28	1978-08-22
1979	1979-05-09	1979-08-05
1980	1980-06-14	1980-08-24
1981	1981-07-03	1981-08-11
1982	1982-05-26	1982-07-19
1983	1983-06-21	1983-09-06
1984	1984-05-26	1984-08-06
1988	1988-06-14	1988-08-12
1989	1989-06-22	1989-07-27
1990	1990-04-27	1990-08-27
1991	1991-05-24	1991-08-30
1992	1992-05-21	1992-08-25
1993	1993-06-14	1993-08-27
1994	1994-06-16	1994-08-04
1995	1995-06-01	1995-08-21
1996	1996-06-11	1996-09-05
1997	1997-06-10	1997-08-11
1998	1998-07-14	1998-08-10
1999	1999-05-30	1999-09-05
2000	2000-06-16	2000-06-26
2001	2001-05-03	2001-09-09
2002	2002-06-21	2002-09-10
2003	2003-05-20	2003-07-05
2004	2004-05-15	2004-08-28
2005	2005-06-03	2005-08-10
2006	2006-07-08	2006-08-02
2007	2007-05-10	2007-08-03
2008	2008-06-08	2008-07-09
2009	2009-05-21	2009-08-18
2010	2010-05-25	2010-09-03
2011	2011-07-11	2011-07-23
2012	2012-06-20	2012-08-26
2013	2013-05-31	2013-08-21
2014	2014-06-28	2014-08-25
2015	2015-05-27	2015-09-07
2016	2016-06-26	2016-08-05
2017	2017-05-18	2017-09-26
2018	2018-05-31	2018-08-07
2019	2019-07-04	2019-08-02
2020	2020-05-27	2020-08-13
2021	2021-05-26	2021-08-26
2022	2022-05-13	2022-08-30
2023	2023-05-28	2023-07-07
2024	2024-06-18	2024-09-17
2025	2025-06-05	2025-08-16
2026	2026-05-20	2026-08-07

Every Fixed Threshold

Fixed thresholds at Houlton AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	75	31	1970	11
35 C (95 F): Days	13	2	1955	1
90 F (32.2 C): Days	62	17	1970	5
0 C (32 F): Ice days (max	75	104	1965	56
0 C (32 F): Frost days (min	75	213	1978	126
-10 C (14 F): Days with min	75	114	1978	53
-20 C (-4 F): Days with min	75	62	1989	18
-30 C (-22 F): Days with min	59	13	1971	1
-40 C (-40 F): Days with min	1	1	1981	1
20 C (68 F): Tropical nights (min	43	7	1973	1
10 mm (0.39 in): Days with 10 mm or more rain	75	48	2005	16
25 mm (0.98 in): Days with 25 mm or more rain	74	16	1976	2
50 mm (1.97 in): Days with 50 mm or more rain	43	4	1990	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1954	1
10 cm (3.9 in): Days with 10 cm or more snowfall	49	12	1977	7
25 cm (9.8 in): Days with 25 cm or more snowfall	34	2	1951	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1974	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

Data for Houlton AP 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).

Houlton AP Threshold Days by Year (USW00014609)

Key Facts for Houlton AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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