Longwood Threshold Days by Year (USC00315116)

17 fixed thresholds counted per year at Longwood (USC00315116): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Longwood Thresholds

Longwood: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 1975 with 59.
Longwood: days with 25 mm (0.98 in) or more of precipitation in 52 years, most in 2015 with 24.
Longwood: days with a maximum temperature at or above 30 C (86 F) in 50 years, most in 1980 with 111.
Longwood: days with a maximum temperature at or above 90 F (32.2 C) in 50 years, most in 1980 with 68.
17 fixed thresholds have at least one qualifying day at Longwood.

Days at or above 30 C (86 F)

50 years with a qualifying day

Days per year at Longwood with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 111 in 1980.

Days at or above 30 C (86 F) per year at Longwood
Year	Days	Decade average
1973	106	91.9
1974	82	91.9
1975	98	91.9
1976	78	91.9
1977	104	91.9
1978	98	91.9
1979	77	91.9
1980	111	97.4
1981	97	97.4
1982	84	97.4
1983	98	97.4
1984	107	97.4
1985	105	97.4
1986	97	97.4
1987	106	97.4
1988	87	97.4
1989	82	97.4
1990	106	87
1991	91	87
1992	70	87
1993	96	87
1994	80	87
1995	86	87
1996	75	87
1997	85	87
1998	111	87
1999	70	87
2000	91	77.6
2002	92	77.6
2003	71	77.6
2004	69	77.6
2006	77	77.6
2008	73	77.6
2009	70	77.6
2010	102	78.9
2011	102	78.9
2012	67	78.9
2013	53	78.9
2014	63	78.9
2015	75	78.9
2016	87	78.9
2017	64	78.9
2018	84	78.9
2019	92	78.9
2020	61	67
2021	60	67
2022	57	67
2023	65	67
2024	63	67
2026	96	67

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

First to last qualifying date each year at Longwood
Year	First date	Last date
1973	1973-03-16	1973-10-06
1974	1974-03-09	1974-11-03
1975	1975-04-29	1975-09-22
1976	1976-03-07	1976-09-29
1977	1977-04-09	1977-10-03
1978	1978-04-03	1978-09-23
1979	1979-05-12	1979-09-29
1980	1980-04-24	1980-09-27
1981	1981-04-19	1981-10-07
1982	1982-03-22	1982-10-07
1983	1983-05-24	1983-10-06
1984	1984-04-29	1984-10-31
1985	1985-03-15	1985-10-21
1986	1986-04-08	1986-10-06
1987	1987-05-01	1987-09-21
1988	1988-05-17	1988-09-25
1989	1989-04-26	1989-10-15
1990	1990-03-13	1990-10-16
1991	1991-04-30	1991-09-20
1992	1992-05-04	1992-09-28
1993	1993-05-07	1993-11-17
1994	1994-05-02	1994-09-17
1995	1995-03-23	1995-09-23
1996	1996-05-06	1996-09-26
1997	1997-05-20	1997-10-09
1998	1998-05-17	1998-10-02
1999	1999-04-09	1999-09-09
2000	2000-05-07	2000-10-07
2002	2002-04-18	2002-10-06
2003	2003-05-08	2003-09-21
2004	2004-05-07	2004-09-17
2006	2006-04-16	2006-09-25
2008	2008-05-11	2008-09-16
2009	2009-06-01	2009-10-11
2010	2010-05-08	2010-09-26
2011	2011-04-21	2011-09-29
2012	2012-03-30	2012-09-07
2013	2013-05-17	2013-09-17
2014	2014-05-07	2014-09-13
2015	2015-05-20	2015-09-21
2016	2016-03-17	2016-09-19
2017	2017-05-11	2017-09-29
2018	2018-05-12	2018-10-06
2019	2019-05-18	2019-10-05
2020	2020-04-10	2020-09-15
2021	2021-05-05	2021-09-17
2022	2022-05-19	2022-09-23
2023	2023-05-10	2023-09-13
2024	2024-04-19	2024-09-02
2026	2026-03-24	2026-10-03

Every Fixed Threshold

Fixed thresholds at Longwood
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	50	111	1980	96
35 C (95 F): Days	39	25	1983	15
90 F (32.2 C): Days	50	68	1980	55
100 F (37.8 C): Days	10	5	1983	1
0 C (32 F): Ice days (max	25	5	1989	2
0 C (32 F): Frost days (min	50	93	1981	44
-10 C (14 F): Days with min	20	8	1981	2
-20 C (-4 F): Days with min	1	1	1989	1
20 C (68 F): Tropical nights (min	50	125	2018	99
25 C (77 F): Days with min	29	15	2010	9
10 mm (0.39 in): Days with 10 mm or more rain	52	59	1975	26
25 mm (0.98 in): Days with 25 mm or more rain	52	24	2015	3
50 mm (1.97 in): Days with 50 mm or more rain	50	9	2019	7
100 mm (3.94 in): Days with 100 mm or more rain	21	3	1979	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1999	1
10 cm (3.9 in): Days with 10 cm or more snowfall	5	2	1989	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1980	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1973.

Download the Data

Data for Longwood 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).

Longwood Threshold Days by Year (USC00315116)

Key Facts for Longwood Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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