Walla Walla Rgnl AP Threshold Days by Year (USW00024160)

19 fixed thresholds counted per year at Walla Walla Rgnl AP (USW00024160): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Walla Walla Rgnl AP Thresholds

Walla Walla Rgnl AP: days with a maximum temperature at or above 30 C (86 F) in 74 years, most in 1994 with 86.
Walla Walla Rgnl AP: days with a maximum temperature at or above 35 C (95 F) in 74 years, most in 1961 with 35.
Walla Walla Rgnl AP: days with a maximum temperature at or above 90 F (32.2 C) in 74 years, most in 1958 with 67.
Walla Walla Rgnl AP: nights with a minimum temperature at or below 0 C (32 F) in 74 years, most in 1955 with 114.
19 fixed thresholds have at least one qualifying day at Walla Walla Rgnl AP.

Days at or above 30 C (86 F)

74 years with a qualifying day

Days per year at Walla Walla Rgnl AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 86 in 1994.

Days at or above 30 C (86 F) per year at Walla Walla Rgnl AP
Year	Days	Decade average
1949	56	56
1950	61	54.9
1951	57	54.9
1952	59	54.9
1953	49	54.9
1954	40	54.9
1955	50	54.9
1956	62	54.9
1957	48	54.9
1958	77	54.9
1959	46	54.9
1960	62	57.4
1961	70	57.4
1962	47	57.4
1963	59	57.4
1964	37	57.4
1965	53	57.4
1966	57	57.4
1967	82	57.4
1968	48	57.4
1969	59	57.4
1970	63	58.7
1971	54	58.7
1972	62	58.7
1973	63	58.7
1974	69	58.7
1975	56	58.7
1976	48	58.7
1977	62	58.7
1978	48	58.7
1979	62	58.7
1980	32	58.1
1981	61	58.1
1982	59	58.1
1983	51	58.1
1984	65	58.1
1985	65	58.1
1986	64	58.1
1987	70	58.1
1988	65	58.1
1989	49	58.1
1990	63	62.2
1991	63	62.2
1992	64	62.2
1993	44	62.2
1994	86	62.2
1999	53	62.2
2000	47	59.5
2001	64	59.5
2002	58	59.5
2003	69	59.5
2004	53	59.5
2005	58	59.5
2006	66	59.5
2007	61	59.5
2008	56	59.5
2009	63	59.5
2010	51	63.9
2011	52	63.9
2012	57	63.9
2013	84	63.9
2014	65	63.9
2015	80	63.9
2016	49	63.9
2017	79	63.9
2018	62	63.9
2019	60	63.9
2020	55	63.3
2021	68	63.3
2022	60	63.3
2023	68	63.3
2024	57	63.3
2025	77	63.3
2026	58	63.3

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

First to last qualifying date each year at Walla Walla Rgnl AP
Year	First date	Last date
1949	1949-05-08	1949-09-09
1950	1950-05-12	1950-09-23
1951	1951-05-10	1951-09-19
1952	1952-05-24	1952-09-26
1953	1953-05-05	1953-09-30
1954	1954-05-17	1954-09-10
1955	1955-06-08	1955-09-10
1956	1956-05-16	1956-09-19
1957	1957-04-29	1957-09-24
1958	1958-05-18	1958-10-04
1959	1959-05-13	1959-09-13
1960	1960-06-01	1960-09-19
1961	1961-05-25	1961-09-04
1962	1962-04-18	1962-09-26
1963	1963-05-20	1963-10-10
1964	1964-05-31	1964-09-16
1965	1965-05-27	1965-10-04
1966	1966-05-03	1966-09-22
1967	1967-06-14	1967-09-28
1968	1968-05-18	1968-09-10
1969	1969-05-11	1969-09-12
1970	1970-05-16	1970-08-31
1971	1971-05-11	1971-09-10
1972	1972-05-13	1972-09-15
1973	1973-05-13	1973-09-12
1974	1974-06-10	1974-10-01
1975	1975-05-13	1975-10-01
1976	1976-05-16	1976-10-01
1977	1977-04-07	1977-09-13
1978	1978-06-02	1978-09-26
1979	1979-05-14	1979-09-24
1980	1980-05-04	1980-10-07
1981	1981-06-24	1981-09-18
1982	1982-06-10	1982-09-09
1983	1983-05-23	1983-09-25
1984	1984-05-28	1984-10-10
1985	1985-05-16	1985-08-29
1986	1986-05-25	1986-09-05
1987	1987-04-27	1987-09-23
1988	1988-05-11	1988-09-14
1989	1989-06-01	1989-09-24
1990	1990-05-05	1990-09-29
1991	1991-06-10	1991-10-15
1992	1992-05-05	1992-10-01
1993	1993-05-10	1993-09-29
1994	1994-05-06	1994-09-28
1999	1999-05-23	1999-09-23
2000	2000-06-04	2000-09-18
2001	2001-05-12	2001-09-24
2002	2002-06-12	2002-09-15
2003	2003-05-23	2003-10-21
2004	2004-06-04	2004-08-31
2005	2005-05-27	2005-09-08
2006	2006-05-15	2006-09-29
2007	2007-05-08	2007-09-12
2008	2008-05-16	2008-10-01
2009	2009-05-17	2009-09-24
2010	2010-06-23	2010-09-28
2011	2011-06-22	2011-09-24
2012	2012-05-14	2012-09-19
2013	2013-05-06	2013-09-15
2014	2014-05-15	2014-10-07
2015	2015-05-28	2015-09-20
2016	2016-05-03	2016-09-16
2017	2017-05-04	2017-09-12
2018	2018-05-14	2018-09-07
2019	2019-06-01	2019-09-12
2020	2020-05-29	2020-10-06
2021	2021-05-16	2021-09-08
2022	2022-06-22	2022-09-27
2023	2023-05-14	2023-09-17
2024	2024-06-08	2024-09-25
2025	2025-05-02	2025-09-24
2026	2026-05-28	2026-09-21

Every Fixed Threshold

Fixed thresholds at Walla Walla Rgnl AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	74	86	1994	58
35 C (95 F): Days	74	35	1961	13
40 C (104 F): Days	50	8	1981	2
45 C (113 F): Days	4	2	1975	2
90 F (32.2 C): Days	74	67	1958	41
100 F (37.8 C): Days	69	17	1967	2
110 F (43.3 C): Days	9	3	2021	3
0 C (32 F): Ice days (max	73	72	1985	8
0 C (32 F): Frost days (min	74	114	1955	32
-10 C (14 F): Days with min	58	28	1949	4
-20 C (-4 F): Days with min	23	9	1950	1
-30 C (-22 F): Days with min	1	1	1968	1
20 C (68 F): Tropical nights (min	71	34	2021	10
25 C (77 F): Days with min	15	3	1977	1
10 mm (0.39 in): Days with 10 mm or more rain	74	27	1981	7
25 mm (0.98 in): Days with 25 mm or more rain	50	6	1991	2
50 mm (1.97 in): Days with 50 mm or more rain	1	2	1992	2
10 cm (3.9 in): Days with 10 cm or more snowfall	28	3	1950	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1994	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

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Data for Walla Walla 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).

Walla Walla Rgnl AP Threshold Days by Year (USW00024160)

Key Facts for Walla Walla Rgnl AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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