Dubuque Rgnl AP Threshold Days by Year (USW00094908)

18 fixed thresholds counted per year at Dubuque Rgnl AP (USW00094908): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dubuque Rgnl AP Thresholds

Dubuque Rgnl AP: days with a maximum temperature at or above 30 C (86 F) in 74 years, most in 1988 with 59.
Dubuque Rgnl AP: days with a maximum temperature at or below 0 C (32 F) in 74 years, most in 1978 with 97.
Dubuque Rgnl AP: nights with a minimum temperature at or below 0 C (32 F) in 74 years, most in 2018 with 167.
Dubuque Rgnl AP: nights with a minimum temperature at or below -10 C (14 F) in 74 years, most in 1978 with 82.
18 fixed thresholds have at least one qualifying day at Dubuque Rgnl AP.

Days at or above 30 C (86 F)

74 years with a qualifying day

Days per year at Dubuque Rgnl AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 59 in 1988.

Days at or above 30 C (86 F) per year at Dubuque Rgnl AP
Year	Days	Decade average
1951	4	27.1
1952	38	27.1
1953	29	27.1
1954	35	27.1
1955	52	27.1
1956	27	27.1
1957	21	27.1
1958	13	27.1
1959	25	27.1
1960	22	20.9
1961	18	20.9
1962	14	20.9
1963	31	20.9
1964	32	20.9
1965	16	20.9
1966	25	20.9
1967	14	20.9
1968	21	20.9
1969	16	20.9
1970	26	24.2
1971	28	24.2
1972	29	24.2
1973	22	24.2
1974	17	24.2
1975	28	24.2
1976	28	24.2
1977	24	24.2
1978	30	24.2
1979	10	24.2
1980	41	33.3
1983	53	33.3
1984	26	33.3
1985	20	33.3
1986	12	33.3
1987	34	33.3
1988	59	33.3
1989	21	33.3
1990	13	20.6
1991	40	20.6
1992	8	20.6
1993	11	20.6
1994	20	20.6
1995	44	20.6
1996	11	20.6
1997	15	20.6
1998	20	20.6
1999	24	20.6
2000	15	20.2
2001	28	20.2
2002	28	20.2
2003	22	20.2
2004	5	20.2
2005	41	20.2
2006	22	20.2
2007	24	20.2
2008	10	20.2
2009	7	20.2
2010	20	22.5
2011	32	22.5
2012	50	22.5
2013	22	22.5
2014	4	22.5
2015	16	22.5
2016	20	22.5
2017	20	22.5
2018	25	22.5
2019	16	22.5
2020	25	29.4
2021	35	29.4
2022	26	29.4
2023	31	29.4
2024	24	29.4
2025	36	29.4
2026	29	29.4

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

First to last qualifying date each year at Dubuque Rgnl AP
Year	First date	Last date
1951	1951-07-24	1951-08-30
1952	1952-04-28	1952-09-30
1953	1953-05-29	1953-10-02
1954	1954-06-11	1954-09-27
1955	1955-05-23	1955-09-18
1956	1956-05-22	1956-08-27
1957	1957-06-16	1957-08-31
1958	1958-06-30	1958-08-30
1959	1959-05-04	1959-09-08
1960	1960-07-19	1960-09-08
1961	1961-05-31	1961-09-10
1962	1962-05-18	1962-09-12
1963	1963-05-08	1963-10-06
1964	1964-05-22	1964-09-09
1965	1965-06-22	1965-08-15
1966	1966-06-20	1966-09-01
1967	1967-05-18	1967-08-01
1968	1968-06-06	1968-08-23
1969	1969-06-26	1969-10-01
1970	1970-05-20	1970-08-29
1971	1971-05-17	1971-10-01
1972	1972-05-20	1972-08-29
1973	1973-06-08	1973-09-02
1974	1974-06-20	1974-08-26
1975	1975-05-19	1975-08-24
1976	1976-06-08	1976-10-01
1977	1977-05-19	1977-08-27
1978	1978-05-26	1978-09-11
1979	1979-06-06	1979-09-02
1980	1980-04-22	1980-09-08
1983	1983-06-12	1983-09-10
1984	1984-06-17	1984-09-24
1985	1985-04-18	1985-09-18
1986	1986-04-25	1986-07-24
1987	1987-04-20	1987-08-21
1988	1988-05-28	1988-09-17
1989	1989-05-24	1989-08-04
1990	1990-06-12	1990-09-06
1991	1991-05-13	1991-09-09
1992	1992-05-16	1992-08-09
1993	1993-06-17	1993-08-26
1994	1994-05-22	1994-09-15
1995	1995-06-07	1995-09-13
1996	1996-05-18	1996-09-04
1997	1997-06-20	1997-10-03
1998	1998-05-14	1998-09-26
1999	1999-06-05	1999-09-04
2000	2000-06-01	2000-09-18
2001	2001-05-15	2001-09-03
2002	2002-06-01	2002-09-09
2003	2003-06-18	2003-09-08
2004	2004-06-07	2004-09-14
2005	2005-06-06	2005-10-03
2006	2006-05-27	2006-10-03
2007	2007-05-14	2007-10-07
2008	2008-06-07	2008-09-02
2009	2009-06-22	2009-08-08
2010	2010-05-23	2010-08-29
2011	2011-05-10	2011-09-02
2012	2012-05-15	2012-09-04
2013	2013-04-30	2013-09-19
2014	2014-07-22	2014-09-04
2015	2015-06-09	2015-09-06
2016	2016-06-10	2016-09-19
2017	2017-06-03	2017-09-25
2018	2018-05-26	2018-09-20
2019	2019-06-27	2019-09-30
2020	2020-06-02	2020-08-28
2021	2021-05-01	2021-09-19
2022	2022-05-09	2022-09-20
2023	2023-05-30	2023-10-01
2024	2024-06-12	2024-09-21
2025	2025-05-15	2025-10-04
2026	2026-05-26	2026-10-12

Every Fixed Threshold

Fixed thresholds at Dubuque Rgnl AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	74	59	1988	29
35 C (95 F): Days	25	17	1988	1
90 F (32.2 C): Days	68	37	1988	13
100 F (37.8 C): Days	2	4	1988	1
0 C (32 F): Ice days (max	74	97	1978	32
0 C (32 F): Frost days (min	74	167	2018	83
-10 C (14 F): Days with min	74	82	1978	28
-20 C (-4 F): Days with min	74	40	1963	8
-30 C (-22 F): Days with min	20	4	1996	2
20 C (68 F): Tropical nights (min	74	32	1995	27
25 C (77 F): Days with min	3	1	2019	1
10 mm (0.39 in): Days with 10 mm or more rain	74	48	2018	32
25 mm (0.98 in): Days with 25 mm or more rain	74	18	1965	13
50 mm (1.97 in): Days with 50 mm or more rain	63	7	1961	5
100 mm (3.94 in): Days with 100 mm or more rain	8	3	1961	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1967	1
10 cm (3.9 in): Days with 10 cm or more snowfall	65	7	2000	2
25 cm (9.8 in): Days with 25 cm or more snowfall	14	1	1959	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

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Data for Dubuque Rgnl 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Dubuque Rgnl AP Threshold Days by Year (USW00094908)

Key Facts for Dubuque Rgnl AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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