Platteville Threshold Days by Year (USC00476646)

17 fixed thresholds counted per year at Platteville (USC00476646): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Platteville Thresholds

Platteville: days with 10 mm (0.39 in) or more of precipitation in 70 years, most in 1991 with 44.
Platteville: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 2007 with 16.
Platteville: days with a maximum temperature at or above 30 C (86 F) in 64 years, most in 1952 with 69.
Platteville: days with a maximum temperature at or below 0 C (32 F) in 64 years, most in 1945 with 100.
17 fixed thresholds have at least one qualifying day at Platteville.

Days at or above 30 C (86 F)

64 years with a qualifying day

Days per year at Platteville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 69 in 1952.

Days at or above 30 C (86 F) per year at Platteville
Year	Days	Decade average
1945	16	23
1946	15	23
1948	38	23
1950	35	46.3
1951	36	46.3
1952	69	46.3
1953	50	46.3
1954	49	46.3
1955	68	46.3
1956	46	46.3
1957	35	46.3
1958	22	46.3
1959	53	46.3
1960	37	28.8
1961	44	28.8
1962	23	28.8
1963	38	28.8
1964	37	28.8
1965	19	28.8
1966	28	28.8
1967	16	28.8
1968	27	28.8
1969	19	28.8
1970	29	30.8
1971	36	30.8
1972	31	30.8
1973	27	30.8
1974	20	30.8
1975	43	30.8
1976	47	30.8
1977	32	30.8
1978	29	30.8
1979	14	30.8
1980	34	33.2
1981	15	33.2
1982	4	33.2
1983	57	33.2
1984	33	33.2
1985	34	33.2
1986	22	33.2
1987	41	33.2
1988	65	33.2
1989	27	33.2
1990	20	22.6
1991	35	22.6
1992	10	22.6
1993	13	22.6
1994	19	22.6
1995	40	22.6
1996	13	22.6
1997	19	22.6
1998	24	22.6
1999	33	22.6
2000	11	21.5
2001	24	21.5
2002	33	21.5
2003	26	21.5
2004	5	21.5
2005	42	21.5
2006	22	21.5
2007	29	21.5
2008	14	21.5
2009	9	21.5
2010	24	24

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

First to last qualifying date each year at Platteville
Year	First date	Last date
1945	1945-07-19	1945-09-05
1946	1946-06-16	1946-07-29
1948	1948-05-20	1948-09-18
1950	1950-06-06	1950-10-18
1951	1951-05-01	1951-09-12
1952	1952-04-28	1952-09-29
1953	1953-05-25	1953-10-18
1954	1954-06-09	1954-09-27
1955	1955-05-03	1955-09-18
1956	1956-05-22	1956-09-03
1957	1957-06-06	1957-09-01
1958	1958-05-14	1958-08-30
1959	1959-05-02	1959-09-20
1960	1960-04-23	1960-09-08
1961	1961-05-13	1961-09-09
1962	1962-05-04	1962-09-13
1963	1963-05-08	1963-10-06
1964	1964-05-18	1964-09-09
1965	1965-06-12	1965-08-17
1966	1966-06-21	1966-08-31
1967	1967-05-18	1967-08-01
1968	1968-06-04	1968-08-24
1969	1969-05-28	1969-08-31
1970	1970-05-21	1970-09-07
1971	1971-05-17	1971-10-01
1972	1972-05-19	1972-08-29
1973	1973-06-08	1973-09-02
1974	1974-06-20	1974-08-26
1975	1975-05-18	1975-10-13
1976	1976-06-07	1976-10-03
1977	1977-05-15	1977-08-27
1978	1978-05-26	1978-09-12
1979	1979-06-06	1979-08-30
1980	1980-04-22	1980-09-09
1981	1981-06-05	1981-07-19
1982	1982-08-01	1982-08-04
1983	1983-06-21	1983-09-10
1984	1984-06-05	1984-09-24
1985	1985-04-18	1985-09-19
1986	1986-04-25	1986-09-26
1987	1987-04-20	1987-08-20
1988	1988-05-29	1988-09-18
1989	1989-06-21	1989-08-23
1990	1990-06-12	1990-09-07
1991	1991-05-13	1991-09-08
1992	1992-06-12	1992-08-26
1993	1993-06-23	1993-08-27
1994	1994-04-19	1994-09-16
1995	1995-06-17	1995-09-05
1996	1996-05-18	1996-08-22
1997	1997-06-24	1997-10-06
1998	1998-05-15	1998-09-27
1999	1999-06-06	1999-09-05
2000	2000-06-02	2000-09-03
2001	2001-05-16	2001-08-10
2002	2002-06-02	2002-09-10
2003	2003-06-19	2003-09-09
2004	2004-06-08	2004-07-21
2005	2005-06-07	2005-10-04
2006	2006-05-29	2006-08-05
2007	2007-05-15	2007-10-08
2008	2008-06-08	2008-09-03
2009	2009-06-23	2009-08-15
2010	2010-05-24	2010-10-10

Every Fixed Threshold

Fixed thresholds at Platteville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	64	69	1952	24
35 C (95 F): Days	28	21	1988	3
90 F (32.2 C): Days	62	50	1955	4
100 F (37.8 C): Days	4	6	1955	5
0 C (32 F): Ice days (max	64	100	1945	73
0 C (32 F): Frost days (min	62	180	1952	129
-10 C (14 F): Days with min	62	83	1978	58
-20 C (-4 F): Days with min	62	36	1963	10
-30 C (-22 F): Days with min	22	6	1994	3
20 C (68 F): Tropical nights (min	61	35	1983	18
25 C (77 F): Days with min	6	3	1988	1
10 mm (0.39 in): Days with 10 mm or more rain	70	44	1991	33
25 mm (0.98 in): Days with 25 mm or more rain	70	16	2007	13
50 mm (1.97 in): Days with 50 mm or more rain	62	6	1961	4
100 mm (3.94 in): Days with 100 mm or more rain	8	1	1942	1
10 cm (3.9 in): Days with 10 cm or more snowfall	53	8	2000	2
25 cm (9.8 in): Days with 25 cm or more snowfall	12	1	1961	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1945.

Download the Data

Data for Platteville 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).

Platteville Threshold Days by Year (USC00476646)

Key Facts for Platteville Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related