Walnut Grove Threshold Days by Year (USC00018648)

7 fixed thresholds counted per year at Walnut Grove (USC00018648): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Walnut Grove Thresholds

Walnut Grove: days with 10 mm (0.39 in) or more of precipitation in 55 years, most in 2009 with 69.
Walnut Grove: days with 25 mm (0.98 in) or more of precipitation in 55 years, most in 1989 with 30.
Walnut Grove: days with 50 mm (1.97 in) or more of precipitation in 54 years, most in 2009 with 12.
Walnut Grove: days with 100 mm (3.94 in) or more of precipitation in 18 years, most in 1951 with 2.
7 fixed thresholds have at least one qualifying day at Walnut Grove.

Days with 10 mm (0.39 in) or more of precipitation

55 years with a qualifying day

Days per year at Walnut Grove with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 69 in 2009.

Days with 10 mm (0.39 in) or more of precipitation per year at Walnut Grove
Year	Days	Decade average
1946	55	48.8
1947	45	48.8
1948	51	48.8
1949	44	48.8
1951	42	37
1952	29	37
1953	39	37
1954	35	37
1955	44	37
1956	35	37
1957	41	37
1958	30	37
1959	38	37
1961	52	43.6
1962	33	43.6
1963	40	43.6
1964	47	43.6
1965	38	43.6
1966	43	43.6
1967	54	43.6
1968	42	43.6
1970	48	46.7
1971	48	46.7
1972	52	46.7
1973	48	46.7
1974	45	46.7
1975	50	46.7
1976	51	46.7
1977	41	46.7
1978	36	46.7
1979	48	46.7
1980	42	48.5
1989	55	48.5
1990	45	39.5
1991	34	39.5
2000	33	53.6
2001	53	53.6
2002	61	53.6
2003	53	53.6
2004	68	53.6
2005	48	53.6
2007	37	53.6
2008	60	53.6
2009	69	53.6
2010	51	53
2017	49	53
2018	54	53
2019	58	53
2020	59	44
2021	44	44
2022	51	44
2023	42	44
2024	38	44
2025	42	44
2026	32	44

For each year, a bar from the first to the last day at Walnut Grove meeting 10 mm (0.39 in).

First to last qualifying date each year at Walnut Grove
Year	First date	Last date
1946	1946-01-06	1946-12-31
1947	1947-01-01	1947-12-15
1948	1948-01-01	1948-12-29
1949	1949-01-04	1949-12-23
1951	1951-01-04	1951-12-26
1952	1952-01-05	1952-12-31
1953	1953-01-10	1953-12-14
1954	1954-01-11	1954-12-30
1955	1955-01-22	1955-12-19
1956	1956-02-01	1956-12-14
1957	1957-01-05	1957-12-20
1958	1958-01-14	1958-12-24
1959	1959-01-16	1959-12-28
1961	1961-01-01	1961-12-28
1962	1962-01-06	1962-12-29
1963	1963-01-18	1963-12-23
1964	1964-01-01	1964-12-26
1965	1965-01-03	1965-12-25
1966	1966-01-03	1966-12-10
1967	1967-01-08	1967-12-28
1968	1968-01-04	1968-12-28
1970	1970-01-26	1970-12-31
1971	1971-01-05	1971-12-20
1972	1972-01-02	1972-12-31
1973	1973-01-06	1973-12-31
1974	1974-01-07	1974-12-30
1975	1975-02-03	1975-12-31
1976	1976-01-03	1976-12-26
1977	1977-01-07	1977-12-30
1978	1978-01-06	1978-12-21
1979	1979-01-01	1979-12-24
1980	1980-01-04	1980-12-10
1989	1989-01-03	1989-12-31
1990	1990-01-05	1990-12-31
1991	1991-02-14	1991-12-28
2000	2000-01-04	2000-12-17
2001	2001-01-18	2001-12-23
2002	2002-01-06	2002-12-24
2003	2003-01-01	2003-12-30
2004	2004-01-05	2004-12-23
2005	2005-02-14	2005-12-25
2007	2007-01-01	2007-12-30
2008	2008-01-09	2008-12-28
2009	2009-01-02	2009-12-25
2010	2010-01-08	2010-12-26
2017	2017-01-03	2017-12-24
2018	2018-01-11	2018-12-28
2019	2019-01-01	2019-12-23
2020	2020-01-02	2020-12-24
2021	2021-01-01	2021-12-30
2022	2022-01-02	2022-12-15
2023	2023-01-04	2023-12-26
2024	2024-01-09	2024-12-29
2025	2025-01-06	2025-12-19
2026	2026-01-03	2026-10-10

Every Fixed Threshold

Fixed thresholds at Walnut Grove
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	55	69	2009	32
25 mm (0.98 in): Days with 25 mm or more rain	55	30	1989	17
50 mm (1.97 in): Days with 50 mm or more rain	54	12	2009	6
100 mm (3.94 in): Days with 100 mm or more rain	18	2	1951	1
10 cm (3.9 in): Days with 10 cm or more snowfall	2	1	1964	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1993	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1993	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1946.

Download the Data

Data for Walnut Grove 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).

Walnut Grove Threshold Days by Year (USC00018648)

Key Facts for Walnut Grove Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

Related