Danbury Threshold Days by Year (USC00312238)

15 fixed thresholds counted per year at Danbury (USC00312238): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Danbury Thresholds

Danbury: days with 10 mm (0.39 in) or more of precipitation in 73 years, most in 2018 with 54.
Danbury: days with 25 mm (0.98 in) or more of precipitation in 73 years, most in 2018 with 24.
Danbury: days with 50 mm (1.97 in) or more of precipitation in 66 years, most in 1987 with 7.
Danbury: days with a maximum temperature at or above 30 C (86 F) in 58 years, most in 2010 with 104.
15 fixed thresholds have at least one qualifying day at Danbury.

Days at or above 30 C (86 F)

58 years with a qualifying day

Days per year at Danbury with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 104 in 2010.

Days at or above 30 C (86 F) per year at Danbury
Year	Days	Decade average
1958	64	67
1959	70	67
1960	64	59.7
1961	61	59.7
1962	61	59.7
1963	68	59.7
1964	65	59.7
1967	38	59.7
1969	61	59.7
1970	75	58.2
1971	41	58.2
1972	56	58.2
1973	54	58.2
1974	46	58.2
1975	65	58.2
1976	55	58.2
1977	77	58.2
1978	67	58.2
1979	46	58.2
1980	83	63.8
1981	67	63.8
1982	49	63.8
1983	74	63.8
1984	58	63.8
1985	58	63.8
1986	84	63.8
1987	61	63.8
1988	64	63.8
1989	40	63.8
1990	59	54.9
1991	53	54.9
1992	25	54.9
1993	60	54.9
1994	40	54.9
1995	52	54.9
1997	54	54.9
1998	91	54.9
1999	60	54.9
2001	87	79
2007	87	79
2008	66	79
2009	76	79
2010	104	78
2011	86	78
2012	67	78
2014	48	78
2015	63	78
2016	81	78
2017	68	78
2018	89	78
2019	96	78
2020	67	60.6
2021	65	60.6
2022	61	60.6
2023	47	60.6
2024	53	60.6
2025	48	60.6
2026	83	60.6

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

First to last qualifying date each year at Danbury
Year	First date	Last date
1958	1958-04-25	1958-10-11
1959	1959-05-03	1959-10-05
1960	1960-04-24	1960-09-21
1961	1961-04-25	1961-09-26
1962	1962-05-02	1962-10-13
1963	1963-04-03	1963-10-09
1964	1964-04-20	1964-09-12
1967	1967-04-04	1967-09-01
1969	1969-05-05	1969-09-09
1970	1970-04-24	1970-09-28
1971	1971-05-19	1971-09-16
1972	1972-04-16	1972-09-27
1973	1973-06-04	1973-09-30
1974	1974-04-30	1974-09-14
1975	1975-05-21	1975-09-10
1976	1976-04-18	1976-09-13
1977	1977-04-12	1977-09-07
1978	1978-05-21	1978-09-23
1979	1979-06-03	1979-09-08
1980	1980-04-24	1980-09-24
1981	1981-04-28	1981-10-07
1982	1982-05-08	1982-09-18
1983	1983-06-14	1983-09-20
1984	1984-04-27	1984-09-26
1985	1985-03-31	1985-09-11
1986	1986-04-01	1986-10-06
1987	1987-05-04	1987-09-09
1988	1988-05-31	1988-09-15
1989	1989-04-27	1989-09-16
1990	1990-04-25	1990-09-11
1991	1991-05-16	1991-09-18
1992	1992-05-24	1992-08-26
1993	1993-05-30	1993-09-27
1994	1994-04-27	1994-09-16
1995	1995-04-20	1995-08-31
1997	1997-05-19	1997-10-07
1998	1998-05-17	1998-10-02
1999	1999-04-24	1999-09-09
2001	2001-04-08	2001-09-11
2007	2007-03-28	2007-10-10
2008	2008-06-01	2008-09-15
2009	2009-04-26	2009-09-25
2010	2010-04-03	2010-10-13
2011	2011-05-23	2011-09-15
2012	2012-05-02	2012-09-09
2014	2014-05-09	2014-09-12
2015	2015-05-12	2015-09-10
2016	2016-04-19	2016-10-20
2017	2017-04-22	2017-10-12
2018	2018-05-05	2018-10-08
2019	2019-04-25	2019-10-05
2020	2020-03-29	2020-09-12
2021	2021-05-23	2021-09-20
2022	2022-05-05	2022-09-23
2023	2023-06-04	2023-09-09
2024	2024-04-19	2024-08-31
2025	2025-04-05	2025-09-25
2026	2026-03-12	2026-10-15

Every Fixed Threshold

Fixed thresholds at Danbury
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	58	104	2010	83
35 C (95 F): Days	39	19	1983	9
90 F (32.2 C): Days	58	57	2010	45
100 F (37.8 C): Days	9	6	1977	2
0 C (32 F): Ice days (max	53	13	1989	9
0 C (32 F): Frost days (min	56	144	1960	48
-10 C (14 F): Days with min	53	36	1963	8
-20 C (-4 F): Days with min	3	1	1985	1
20 C (68 F): Tropical nights (min	55	77	2018	49
10 mm (0.39 in): Days with 10 mm or more rain	73	54	2018	18
25 mm (0.98 in): Days with 25 mm or more rain	73	24	2018	4
50 mm (1.97 in): Days with 50 mm or more rain	66	7	1987	3
100 mm (3.94 in): Days with 100 mm or more rain	19	2	1970	1
10 cm (3.9 in): Days with 10 cm or more snowfall	29	5	1982	1
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1960	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 Danbury 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).

Danbury Threshold Days by Year (USC00312238)

Key Facts for Danbury Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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