W Allis Threshold Days by Year (USC00479046)

19 fixed thresholds counted per year at W Allis (USC00479046): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for W Allis Thresholds

W Allis: days with a maximum temperature at or above 30 C (86 F) in 50 years, most in 2010 with 60.
W Allis: days with a maximum temperature at or above 90 F (32.2 C) in 50 years, most in 2002 with 38.
W Allis: days with a maximum temperature at or below 0 C (32 F) in 50 years, most in 1960 with 75.
W Allis: days with 10 mm (0.39 in) or more of precipitation in 50 years, most in 1960 with 37.
19 fixed thresholds have at least one qualifying day at W Allis.

Days at or above 30 C (86 F)

50 years with a qualifying day

Days per year at W Allis with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 60 in 2010.

Days at or above 30 C (86 F) per year at W Allis
Year	Days	Decade average
1952	41	38.1
1953	49	38.1
1954	32	38.1
1955	49	38.1
1956	29	38.1
1957	28	38.1
1958	24	38.1
1959	53	38.1
1960	24	33
1961	33	33
1962	29	33
1963	36	33
1964	44	33
1965	41	33
1966	44	33
1967	17	33
1968	33	33
1969	29	33
1970	43	32.1
1971	40	32.1
1972	25	32.1
1973	31	32.1
1974	21	32.1
1975	31	32.1
1976	38	32.1
1977	30	32.1
1978	33	32.1
1979	29	32.1
1980	33	27.6
1981	18	27.6
1982	18	27.6
1983	52	27.6
1984	29	27.6
1985	27	27.6
1986	16	27.6
1999	37	37
2000	22	39.2
2001	51	39.2
2002	54	39.2
2003	49	39.2
2004	30	39.2
2005	58	39.2
2006	30	39.2
2007	47	39.2
2008	27	39.2
2009	24	39.2
2010	60	60
2024	33	36
2025	39	36
2026	36	36

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

First to last qualifying date each year at W Allis
Year	First date	Last date
1952	1952-05-01	1952-09-28
1953	1953-05-09	1953-09-29
1954	1954-05-31	1954-09-06
1955	1955-05-03	1955-09-18
1956	1956-05-22	1956-08-28
1957	1957-06-15	1957-09-01
1958	1958-05-17	1958-09-03
1959	1959-05-02	1959-09-22
1960	1960-04-22	1960-09-08
1961	1961-05-13	1961-09-10
1962	1962-05-13	1962-09-12
1963	1963-05-08	1963-10-06
1964	1964-05-07	1964-10-25
1965	1965-05-06	1965-09-19
1966	1966-06-02	1966-10-08
1967	1967-05-18	1967-10-04
1968	1968-06-05	1968-09-03
1969	1969-05-16	1969-08-31
1970	1970-05-21	1970-09-21
1971	1971-06-04	1971-10-02
1972	1972-05-20	1972-08-31
1973	1973-06-08	1973-09-03
1974	1974-05-21	1974-09-11
1975	1975-05-18	1975-10-13
1976	1976-06-07	1976-09-13
1977	1977-05-13	1977-08-31
1978	1978-05-26	1978-09-19
1979	1979-05-08	1979-09-12
1980	1980-04-22	1980-09-03
1981	1981-06-05	1981-09-11
1982	1982-05-11	1982-09-30
1983	1983-06-11	1983-09-10
1984	1984-06-05	1984-09-24
1985	1985-04-18	1985-09-19
1986	1986-06-11	1986-09-25
1999	1999-05-30	1999-09-06
2000	2000-05-06	2000-09-19
2001	2001-05-01	2001-09-08
2002	2002-04-16	2002-10-01
2003	2003-04-15	2003-09-12
2004	2004-04-19	2004-09-24
2005	2005-06-06	2005-10-06
2006	2006-04-15	2006-08-23
2007	2007-04-30	2007-10-09
2008	2008-06-03	2008-09-03
2009	2009-04-25	2009-09-15
2010	2010-04-02	2010-10-11
2024	2024-06-13	2024-09-22
2025	2025-05-17	2025-10-05
2026	2026-05-17	2026-10-13

Every Fixed Threshold

Fixed thresholds at W Allis
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	50	60	2010	36
35 C (95 F): Days	43	15	1955	5
40 C (104 F): Days	1	0	n/a	1
90 F (32.2 C): Days	50	38	2002	15
100 F (37.8 C): Days	12	2	1953	1
0 C (32 F): Ice days (max	50	75	1960	35
0 C (32 F): Frost days (min	48	154	2002	78
-10 C (14 F): Days with min	48	61	1963	31
-20 C (-4 F): Days with min	45	29	1963	5
-30 C (-22 F): Days with min	4	2	1982	2
20 C (68 F): Tropical nights (min	48	56	1983	31
25 C (77 F): Days with min	19	3	1968	2
10 mm (0.39 in): Days with 10 mm or more rain	50	37	1960	27
25 mm (0.98 in): Days with 25 mm or more rain	50	14	2000	10
50 mm (1.97 in): Days with 50 mm or more rain	36	5	1999	2
100 mm (3.94 in): Days with 100 mm or more rain	3	1	2008	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	2025	1
10 cm (3.9 in): Days with 10 cm or more snowfall	37	10	2007	1
25 cm (9.8 in): Days with 25 cm or more snowfall	8	3	2008	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 W Allis 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).

W Allis Threshold Days by Year (USC00479046)

Key Facts for W Allis Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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