Redstone Threshold Days by Year (USC00246927)

17 fixed thresholds counted per year at Redstone (USC00246927): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Redstone Thresholds

Redstone: days with 10 mm (0.39 in) or more of precipitation in 53 years, most in 1972 with 19.
Redstone: days with a maximum temperature at or above 30 C (86 F) in 51 years, most in 1961 with 68.
Redstone: days with a maximum temperature at or above 90 F (32.2 C) in 51 years, most in 1961 with 49.
Redstone: days with a maximum temperature at or below 0 C (32 F) in 51 years, most in 1978 with 105.
17 fixed thresholds have at least one qualifying day at Redstone.

Days at or above 30 C (86 F)

51 years with a qualifying day

Days per year at Redstone with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 68 in 1961.

Days at or above 30 C (86 F) per year at Redstone
Year	Days	Decade average
1952	23	32.6
1953	27	32.6
1954	23	32.6
1955	34	32.6
1956	38	32.6
1957	37	32.6
1958	38	32.6
1959	41	32.6
1960	35	40.4
1961	68	40.4
1962	19	40.4
1963	42	40.4
1964	40	40.4
1965	28	40.4
1966	45	40.4
1967	45	40.4
1968	37	40.4
1969	45	40.4
1970	57	39.2
1971	50	39.2
1972	26	39.2
1973	53	39.2
1974	32	39.2
1975	30	39.2
1976	29	39.2
1977	36	39.2
1978	34	39.2
1979	45	39.2
1980	47	46.5
1981	53	46.5
1982	26	46.5
1983	61	46.5
1984	56	46.5
1985	33	46.5
1986	36	46.5
1987	44	46.5
1988	59	46.5
1989	50	46.5
1990	48	35.1
1991	35	35.1
1992	26	35.1
1993	8	35.1
1994	39	35.1
1995	38	35.1
1996	33	35.1
1997	41	35.1
1998	51	35.1
1999	32	35.1
2006	59	41.7
2007	38	41.7
2008	28	41.7

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

First to last qualifying date each year at Redstone
Year	First date	Last date
1952	1952-04-26	1952-09-26
1953	1953-05-06	1953-10-01
1954	1954-05-19	1954-09-03
1955	1955-06-28	1955-10-10
1956	1956-05-19	1956-09-26
1957	1957-05-30	1957-09-28
1958	1958-05-11	1958-09-12
1959	1959-06-02	1959-09-13
1960	1960-05-12	1960-09-19
1961	1961-05-28	1961-10-16
1962	1962-04-24	1962-09-06
1963	1963-05-30	1963-10-03
1964	1964-05-17	1964-09-17
1965	1965-07-03	1965-08-23
1966	1966-05-21	1966-09-20
1967	1967-06-17	1967-09-29
1968	1968-04-30	1968-09-12
1969	1969-05-25	1969-09-19
1970	1970-05-17	1970-09-18
1971	1971-05-13	1971-09-11
1972	1972-05-16	1972-09-09
1973	1973-05-31	1973-09-30
1974	1974-06-13	1974-08-06
1975	1975-06-24	1975-09-25
1976	1976-06-02	1976-09-18
1977	1977-04-26	1977-08-25
1978	1978-05-15	1978-09-11
1979	1979-05-16	1979-09-28
1980	1980-04-20	1980-09-07
1981	1981-05-20	1981-09-18
1982	1982-07-03	1982-09-09
1983	1983-05-25	1983-09-26
1984	1984-05-29	1984-09-18
1985	1985-05-03	1985-08-30
1986	1986-05-29	1986-08-30
1987	1987-04-28	1987-10-03
1988	1988-05-24	1988-09-07
1989	1989-04-22	1989-09-30
1990	1990-04-21	1990-09-25
1991	1991-06-11	1991-09-07
1992	1992-05-06	1992-10-02
1993	1993-05-13	1993-09-11
1994	1994-05-27	1994-09-23
1995	1995-05-31	1995-09-04
1996	1996-06-08	1996-09-01
1997	1997-05-31	1997-10-02
1998	1998-05-03	1998-09-17
1999	1999-06-21	1999-09-23
2006	2006-05-17	2006-09-13
2007	2007-05-19	2007-09-16
2008	2008-06-30	2008-09-18

Every Fixed Threshold

Fixed thresholds at Redstone
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	51	68	1961	28
35 C (95 F): Days	49	25	1983	5
40 C (104 F): Days	11	4	1983	2
90 F (32.2 C): Days	51	49	1961	14
100 F (37.8 C): Days	36	12	1988	6
110 F (43.3 C): Days	2	1	1983	1
0 C (32 F): Ice days (max	51	105	1978	58
0 C (32 F): Frost days (min	49	228	1965	182
-10 C (14 F): Days with min	49	130	1955	84
-20 C (-4 F): Days with min	49	69	1978	52
-30 C (-22 F): Days with min	48	26	1996	11
-40 C (-40 F): Days with min	14	4	1954	1
20 C (68 F): Tropical nights (min	16	5	1988	5
10 mm (0.39 in): Days with 10 mm or more rain	53	19	1972	12
25 mm (0.98 in): Days with 25 mm or more rain	40	6	2008	6
50 mm (1.97 in): Days with 50 mm or more rain	7	2	2007	2
10 cm (3.9 in): Days with 10 cm or more snowfall	14	5	1999	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.

Download the Data

Data for Redstone 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).

Redstone Threshold Days by Year (USC00246927)

Key Facts for Redstone Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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