Roosevelt Radio Threshold Days by Year (USC00427395)

17 fixed thresholds counted per year at Roosevelt Radio (USC00427395): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Roosevelt Radio Thresholds

Roosevelt Radio: nights with a minimum temperature at or below 0 C (32 F) in 71 years, most in 1970 with 209.
Roosevelt Radio: nights with a minimum temperature at or below -10 C (14 F) in 71 years, most in 1952 with 104.
Roosevelt Radio: days with a maximum temperature at or above 30 C (86 F) in 70 years, most in 2018 with 109.
Roosevelt Radio: days with a maximum temperature at or above 35 C (95 F) in 70 years, most in 2003 with 45.
17 fixed thresholds have at least one qualifying day at Roosevelt Radio.

Days at or above 30 C (86 F)

70 years with a qualifying day

Days per year at Roosevelt Radio with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 109 in 2018.

Days at or above 30 C (86 F) per year at Roosevelt Radio
Year	Days	Decade average
1950	70	76.7
1951	66	76.7
1952	76	76.7
1953	75	76.7
1954	77	76.7
1955	43	76.7
1956	96	76.7
1957	77	76.7
1958	99	76.7
1959	88	76.7
1960	88	67.6
1961	79	67.6
1962	59	67.6
1963	64	67.6
1964	70	67.6
1965	42	67.6
1966	81	67.6
1967	68	67.6
1968	57	67.6
1969	68	67.6
1970	72	77.1
1971	79	77.1
1972	60	77.1
1973	66	77.1
1974	94	77.1
1975	61	77.1
1976	80	77.1
1977	89	77.1
1978	86	77.1
1979	84	77.1
1980	71	74
1981	76	74
1982	56	74
1983	70	74
1984	81	74
1987	60	74
1988	97	74
1989	81	74
1990	96	76.5
1991	72	76.5
1992	66	76.5
1993	59	76.5
1994	99	76.5
1995	68	76.5
1996	93	76.5
1997	69	76.5
1998	81	76.5
1999	62	76.5
2000	97	89.8
2001	97	89.8
2002	90	89.8
2003	94	89.8
2004	74	89.8
2005	89	89.8
2006	92	89.8
2007	98	89.8
2008	77	89.8
2010	78	89.1
2011	68	89.1
2012	107	89.1
2013	90	89.1
2014	76	89.1
2015	98	89.1
2016	91	89.1
2017	92	89.1
2018	109	89.1
2019	82	89.1
2020	97	92.7
2021	91	92.7
2022	90	92.7

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

First to last qualifying date each year at Roosevelt Radio
Year	First date	Last date
1950	1950-05-31	1950-09-06
1951	1951-05-26	1951-09-08
1952	1952-06-05	1952-09-18
1953	1953-06-09	1953-09-26
1954	1954-05-08	1954-09-02
1955	1955-06-06	1955-09-14
1956	1956-05-17	1956-09-26
1957	1957-06-02	1957-10-01
1958	1958-05-18	1958-09-11
1959	1959-05-12	1959-09-14
1960	1960-05-10	1960-10-01
1961	1961-05-27	1961-09-06
1962	1962-06-10	1962-08-29
1963	1963-05-20	1963-09-30
1964	1964-05-15	1964-09-11
1965	1965-06-22	1965-08-28
1966	1966-05-03	1966-09-23
1967	1967-05-22	1967-09-24
1968	1968-05-29	1968-09-11
1969	1969-05-17	1969-09-28
1970	1970-05-16	1970-09-03
1971	1971-05-26	1971-09-14
1972	1972-05-15	1972-08-30
1973	1973-05-17	1973-09-20
1974	1974-05-08	1974-09-26
1975	1975-05-14	1975-09-07
1976	1976-05-14	1976-09-05
1977	1977-05-31	1977-09-29
1978	1978-05-14	1978-09-28
1979	1979-05-21	1979-09-30
1980	1980-05-21	1980-09-18
1981	1981-04-29	1981-09-19
1982	1982-05-26	1982-09-04
1983	1983-05-26	1983-09-18
1984	1984-05-12	1984-09-18
1987	1987-06-04	1987-09-23
1988	1988-05-13	1988-09-09
1989	1989-04-20	1989-09-29
1990	1990-05-22	1990-09-16
1991	1991-06-08	1991-09-06
1992	1992-04-27	1992-09-25
1993	1993-05-26	1993-09-12
1994	1994-05-23	1994-09-29
1995	1995-06-12	1995-09-16
1996	1996-05-12	1996-09-10
1997	1997-05-15	1997-09-10
1998	1998-06-02	1998-09-18
1999	1999-05-23	1999-08-27
2000	2000-05-03	2000-09-16
2001	2001-05-12	2001-09-28
2002	2002-05-18	2002-09-05
2003	2003-05-23	2003-10-02
2004	2004-05-04	2004-09-18
2005	2005-05-20	2005-09-21
2006	2006-05-17	2006-09-15
2007	2007-05-11	2007-09-23
2008	2008-05-18	2008-09-26
2010	2010-06-04	2010-09-30
2011	2011-06-05	2011-09-06
2012	2012-04-23	2012-09-17
2013	2013-05-13	2013-09-07
2014	2014-05-18	2014-09-22
2015	2015-05-31	2015-10-02
2016	2016-06-02	2016-09-20
2017	2017-05-31	2017-09-12
2018	2018-05-07	2018-09-29
2019	2019-06-07	2019-09-26
2020	2020-05-18	2020-09-26
2021	2021-05-28	2021-09-18
2022	2022-05-15	2022-09-13

Every Fixed Threshold

Fixed thresholds at Roosevelt Radio
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	70	109	2018	90
35 C (95 F): Days	70	45	2003	32
40 C (104 F): Days	7	2	1958	1
90 F (32.2 C): Days	70	78	2012	67
100 F (37.8 C): Days	42	17	2002	7
0 C (32 F): Ice days (max	70	84	2013	29
0 C (32 F): Frost days (min	71	209	1970	191
-10 C (14 F): Days with min	71	104	1952	93
-20 C (-4 F): Days with min	68	62	2013	11
-30 C (-22 F): Days with min	23	10	2013	1
-40 C (-40 F): Days with min	2	3	1989	2
20 C (68 F): Tropical nights (min	18	4	1969	1
10 mm (0.39 in): Days with 10 mm or more rain	62	11	1965	4
25 mm (0.98 in): Days with 25 mm or more rain	13	1	1951	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	2016	1
10 cm (3.9 in): Days with 10 cm or more snowfall	29	6	1978	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1950	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1950.

Download the Data

Data for Roosevelt Radio 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).

Roosevelt Radio Threshold Days by Year (USC00427395)

Key Facts for Roosevelt Radio Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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