Walnut Grove Weather Records (USC00029166)

Record envelope, standing records and threshold days for Walnut Grove (USC00029166), Arizona, United States, with 134 years of record.

Key Facts for Walnut Grove

Walnut Grove (USC00029166) is a weather station in Arizona, United States at 34.30 latitude and -112.56 longitude, 1,147 m (3,764 ft) above sea level.
The station reports from 1893 to 2026, 134 years of record.
0 records set at Walnut Grove still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Walnut Grove set a daily record precipitation of 34.3 mm (1.4 in) on 14 August 2026.

About the Station

Location: Arizona, United States, 34.30 latitude, -112.56 longitude.
Elevation: 1,147 m (3,764 ft).
Period of record: 1893 to 2026, 134 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Walnut Grove. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Walnut Grove, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at Walnut Grove still stand.

Wettest Day of Each Month

Jul: 101.6 mm (4.0 in)

The wettest day on record for each calendar month at Walnut Grove. The most was 101.6 mm (4.0 in) on 10 July 1916.

Record daily precipitation for each month at Walnut Grove
Month	Record daily precipitation (mm)	Date
Jan	71.1 mm (2.8 in)	21 January 2010
Feb	69.9 mm (2.8 in)	5 February 1976
Mar	64.8 mm (2.6 in)	1 March 1991
Apr	35.6 mm (1.4 in)	11 April 1912
May	53.3 mm (2.1 in)	20 May 2023
Jun	58.4 mm (2.3 in)	13 June 1955
Jul	101.6 mm (4.0 in)	10 July 1916
Aug	87.6 mm (3.4 in)	4 August 2016
Sep	92.7 mm (3.6 in)	5 September 1970
Oct	68.6 mm (2.7 in)	22 October 2000
Nov	82.0 mm (3.2 in)	11 November 1978
Dec	75.7 mm (3.0 in)	29 December 2004

Latest Records

Latest records at Walnut Grove
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
14 August 2026	Walnut Grove, US	daily rain	34.3 mm (1.4 in)	8.9 mm (0.35 in)	68 years	37 of 100 (Notable)
17 February 2026	Walnut Grove, US	daily rain	21.8 mm (0.9 in)	7.8 mm (0.31 in)	55 years	20 of 100 (Routine)
1 January 2026	Walnut Grove, US	daily rain	19.1 mm (0.8 in)	6.1 mm (0.24 in)	8 years	17 of 100 (Routine)
24 November 2025	Walnut Grove, US	daily rain (Tie)	13.0 mm (0.5 in)	tie	107 years	10 of 100 (Routine)
16 November 2025	Walnut Grove, US	daily rain	63.2 mm (2.5 in)	23.8 mm (0.9 in)	72 years	49 of 100 (Notable)
11 October 2025	Walnut Grove, US	daily rain	38.9 mm (1.5 in)	11.5 mm (0.5 in)	125 years	50 of 100 (Notable)
22 September 2025	Walnut Grove, US	daily rain	11.2 mm (0.4 in)	2.8 mm (0.11 in)	39 years	20 of 100 (Routine)
7 May 2025	Walnut Grove, US	daily rain	13.2 mm (0.5 in)	2.5 mm (0.10 in)	6 years	14 of 100 (Routine)
18 April 2025	Walnut Grove, US	daily rain (Tie)	8.4 mm (0.33 in)	tie	30 years	4 of 100 (Routine)
14 March 2025	Walnut Grove, US	daily rain	42.7 mm (1.7 in)	14.0 mm (0.6 in)	80 years	47 of 100 (Notable)
23 June 2024	Walnut Grove, US	daily rain	17.0 mm (0.7 in)	12.9 mm (0.5 in)	75 years	20 of 100 (Routine)
9 February 2024	Walnut Grove, US	daily snow depth	2.5 cm (1.0 in)	2.5 cm (1.0 in)	130 years	20 of 100 (Routine)
7 February 2024	Walnut Grove, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	130 years	47 of 100 (Notable)
7 February 2024	Walnut Grove, US	daily snow depth	5.1 cm (2.0 in)	5.1 cm (2.0 in)	130 years	20 of 100 (Routine)
7 February 2024	Walnut Grove, US	daily rain	55.9 mm (2.2 in)	17.3 mm (0.7 in)	32 years	33 of 100 (Routine)
3 February 2024	Walnut Grove, US	daily snow depth	2.5 cm (1.0 in)	2.5 cm (1.0 in)	130 years	20 of 100 (Routine)
2 February 2024	Walnut Grove, US	daily rain	34.5 mm (1.4 in)	9.1 mm (0.36 in)	118 years	47 of 100 (Notable)
2 February 2024	Walnut Grove, US	daily snow depth	5.1 cm (2.0 in)	5.1 cm (2.0 in)	130 years	20 of 100 (Routine)
11 December 2023	Walnut Grove, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	129 years	54 of 100 (Notable)
20 May 2023	Walnut Grove, US	monthly rain	53.3 mm (2.1 in)	13.9 mm (0.5 in)	88 years	70 of 100 (Major)

Extremes by Year

1893 to 2026

Yearly extremes at Walnut Grove: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	101.6 mm (4.0 in)	1916	44.5 mm (1.8 in)	133
Wettest five days (Rx5day)	179.5 mm (7.1 in)	1978	66.2 mm (2.6 in)	133
Longest dry spell (CDD)	197 days	1972	64 days	133

Wettest day (Rx1day)

The wettest day of the year at Walnut Grove, 1893 to 2026. The record is 101.6 mm (4.0 in) in 1916, marked on the chart; the median year is 44.5 mm (1.8 in).

Wettest day (Rx1day) at Walnut Grove by year
Year	Wettest day (Rx1day)
1893	25.7 mm (1.0 in)
1894	19.1 mm (0.8 in)
1896	44.5 mm (1.8 in)
1897	26.7 mm (1.1 in)
1898	52.8 mm (2.1 in)
1899	38.1 mm (1.5 in)
1900	26.2 mm (1.0 in)
1901	35.6 mm (1.4 in)
1902	27.7 mm (1.1 in)
1903	27.7 mm (1.1 in)
1904	76.2 mm (3.0 in)
1905	50.8 mm (2.0 in)
1906	55.9 mm (2.2 in)
1907	45.7 mm (1.8 in)
1908	55.9 mm (2.2 in)
1909	55.9 mm (2.2 in)
1910	25.4 mm (1.0 in)
1911	35.6 mm (1.4 in)
1912	62.2 mm (2.4 in)
1913	27.9 mm (1.1 in)
1914	50.5 mm (2.0 in)
1915	34.3 mm (1.4 in)
1916	101.6 mm (4.0 in)
1917	18.3 mm (0.7 in)
1918	35.6 mm (1.4 in)
1919	62.0 mm (2.4 in)
1920	31.2 mm (1.2 in)
1921	30.5 mm (1.2 in)
1922	88.9 mm (3.5 in)
1923	57.2 mm (2.3 in)
1924	55.9 mm (2.2 in)
1925	59.9 mm (2.4 in)
1926	54.6 mm (2.1 in)
1927	71.1 mm (2.8 in)
1928	18.3 mm (0.7 in)
1929	55.9 mm (2.2 in)
1930	38.1 mm (1.5 in)
1931	56.4 mm (2.2 in)
1932	38.1 mm (1.5 in)
1933	37.3 mm (1.5 in)
1934	43.2 mm (1.7 in)
1935	41.9 mm (1.6 in)
1936	44.5 mm (1.8 in)
1937	48.3 mm (1.9 in)
1938	43.2 mm (1.7 in)
1939	36.3 mm (1.4 in)
1940	49.3 mm (1.9 in)
1941	43.7 mm (1.7 in)
1942	29.7 mm (1.2 in)
1943	62.2 mm (2.4 in)
1944	50.8 mm (2.0 in)
1945	47.0 mm (1.9 in)
1946	36.8 mm (1.4 in)
1947	35.1 mm (1.4 in)
1948	50.8 mm (2.0 in)
1949	50.8 mm (2.0 in)
1950	30.0 mm (1.2 in)
1951	79.8 mm (3.1 in)
1952	39.9 mm (1.6 in)
1953	37.8 mm (1.5 in)
1954	50.8 mm (2.0 in)
1955	58.4 mm (2.3 in)
1956	26.7 mm (1.1 in)
1957	39.1 mm (1.5 in)
1958	63.5 mm (2.5 in)
1959	44.5 mm (1.8 in)
1960	35.6 mm (1.4 in)
1961	34.3 mm (1.4 in)
1962	31.8 mm (1.3 in)
1963	57.7 mm (2.3 in)
1964	22.9 mm (0.9 in)
1965	55.9 mm (2.2 in)
1966	33.5 mm (1.3 in)
1967	39.4 mm (1.6 in)
1968	39.4 mm (1.6 in)
1969	27.9 mm (1.1 in)
1970	92.7 mm (3.6 in)
1971	57.2 mm (2.3 in)
1972	49.5 mm (1.9 in)
1973	38.1 mm (1.5 in)
1974	27.9 mm (1.1 in)
1975	46.2 mm (1.8 in)
1976	69.9 mm (2.8 in)
1977	25.4 mm (1.0 in)
1978	82.0 mm (3.2 in)
1979	38.1 mm (1.5 in)
1980	52.8 mm (2.1 in)
1981	43.4 mm (1.7 in)
1982	50.8 mm (2.0 in)
1983	44.7 mm (1.8 in)
1984	48.3 mm (1.9 in)
1985	46.7 mm (1.8 in)
1986	33.8 mm (1.3 in)
1987	57.2 mm (2.3 in)
1988	44.7 mm (1.8 in)
1989	35.1 mm (1.4 in)
1990	30.5 mm (1.2 in)
1991	64.8 mm (2.6 in)
1992	60.5 mm (2.4 in)
1993	68.3 mm (2.7 in)
1994	52.1 mm (2.1 in)
1995	53.8 mm (2.1 in)
1996	26.4 mm (1.0 in)
1997	69.9 mm (2.8 in)
1998	37.8 mm (1.5 in)
1999	52.1 mm (2.1 in)
2000	68.6 mm (2.7 in)
2001	25.7 mm (1.0 in)
2002	27.7 mm (1.1 in)
2003	54.9 mm (2.2 in)
2004	75.7 mm (3.0 in)
2005	43.4 mm (1.7 in)
2006	43.9 mm (1.7 in)
2007	68.6 mm (2.7 in)
2008	42.2 mm (1.7 in)
2009	36.1 mm (1.4 in)
2010	71.1 mm (2.8 in)
2011	20.3 mm (0.8 in)
2012	52.1 mm (2.1 in)
2013	30.7 mm (1.2 in)
2014	47.0 mm (1.9 in)
2015	34.3 mm (1.4 in)
2016	87.6 mm (3.4 in)
2017	49.5 mm (1.9 in)
2018	38.1 mm (1.5 in)
2019	45.7 mm (1.8 in)
2020	61.0 mm (2.4 in)
2021	30.0 mm (1.2 in)
2022	34.3 mm (1.4 in)
2023	53.3 mm (2.1 in)
2024	55.9 mm (2.2 in)
2025	63.2 mm (2.5 in)
2026	34.3 mm (1.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Walnut Grove, 1893 to 2026. The record is 179.5 mm (7.1 in) in 1978, marked on the chart; the median year is 66.2 mm (2.6 in).

Wettest five days (Rx5day) at Walnut Grove by year
Year	Wettest five days (Rx5day)
1893	42.2 mm (1.7 in)
1894	19.1 mm (0.8 in)
1896	44.5 mm (1.8 in)
1897	30.3 mm (1.2 in)
1898	56.1 mm (2.2 in)
1899	38.1 mm (1.5 in)
1900	26.7 mm (1.1 in)
1901	36.4 mm (1.4 in)
1902	53.1 mm (2.1 in)
1903	53.9 mm (2.1 in)
1904	103.9 mm (4.1 in)
1905	158.7 mm (6.2 in)
1906	88.9 mm (3.5 in)
1907	61.0 mm (2.4 in)
1908	94.0 mm (3.7 in)
1909	68.6 mm (2.7 in)
1910	52.6 mm (2.1 in)
1911	54.1 mm (2.1 in)
1912	77.5 mm (3.1 in)
1913	43.9 mm (1.7 in)
1914	53.5 mm (2.1 in)
1915	64.0 mm (2.5 in)
1916	101.6 mm (4.0 in)
1917	33.5 mm (1.3 in)
1918	95.3 mm (3.8 in)
1919	85.1 mm (3.4 in)
1920	41.2 mm (1.6 in)
1921	56.1 mm (2.2 in)
1922	91.4 mm (3.6 in)
1923	57.2 mm (2.3 in)
1924	57.2 mm (2.3 in)
1925	90.4 mm (3.6 in)
1926	92.7 mm (3.6 in)
1927	173.9 mm (6.8 in)
1928	43.4 mm (1.7 in)
1929	63.8 mm (2.5 in)
1930	91.4 mm (3.6 in)
1931	123.9 mm (4.9 in)
1932	72.2 mm (2.8 in)
1933	58.4 mm (2.3 in)
1934	56.7 mm (2.2 in)
1935	94.0 mm (3.7 in)
1936	83.8 mm (3.3 in)
1937	83.8 mm (3.3 in)
1938	91.0 mm (3.6 in)
1939	85.3 mm (3.4 in)
1940	59.7 mm (2.4 in)
1941	68.1 mm (2.7 in)
1942	44.5 mm (1.8 in)
1943	76.4 mm (3.0 in)
1944	105.2 mm (4.1 in)
1945	64.6 mm (2.5 in)
1946	59.2 mm (2.3 in)
1947	41.9 mm (1.6 in)
1948	62.0 mm (2.4 in)
1949	83.9 mm (3.3 in)
1950	52.9 mm (2.1 in)
1951	155.5 mm (6.1 in)
1952	60.7 mm (2.4 in)
1953	63.3 mm (2.5 in)
1954	116.9 mm (4.6 in)
1955	76.3 mm (3.0 in)
1956	26.7 mm (1.1 in)
1957	77.8 mm (3.1 in)
1958	68.1 mm (2.7 in)
1959	65.5 mm (2.6 in)
1960	42.8 mm (1.7 in)
1961	41.2 mm (1.6 in)
1962	55.1 mm (2.2 in)
1963	83.1 mm (3.3 in)
1964	35.5 mm (1.4 in)
1965	98.8 mm (3.9 in)
1966	50.2 mm (2.0 in)
1967	97.3 mm (3.8 in)
1968	58.4 mm (2.3 in)
1969	41.6 mm (1.6 in)
1970	134.6 mm (5.3 in)
1971	90.7 mm (3.6 in)
1972	94.9 mm (3.7 in)
1973	66.2 mm (2.6 in)
1974	69.3 mm (2.7 in)
1975	58.4 mm (2.3 in)
1976	132.7 mm (5.2 in)
1977	52.3 mm (2.1 in)
1978	179.5 mm (7.1 in)
1979	81.8 mm (3.2 in)
1980	105.6 mm (4.2 in)
1981	67.5 mm (2.7 in)
1982	66.5 mm (2.6 in)
1983	106.6 mm (4.2 in)
1984	54.9 mm (2.2 in)
1985	73.6 mm (2.9 in)
1986	64.3 mm (2.5 in)
1987	99.7 mm (3.9 in)
1988	67.3 mm (2.6 in)
1989	42.7 mm (1.7 in)
1990	56.5 mm (2.2 in)
1991	116.9 mm (4.6 in)
1992	68.9 mm (2.7 in)
1993	98.3 mm (3.9 in)
1994	66.8 mm (2.6 in)
1995	75.6 mm (3.0 in)
1996	37.4 mm (1.5 in)
1997	83.6 mm (3.3 in)
1998	78.2 mm (3.1 in)
1999	56.6 mm (2.2 in)
2000	82.6 mm (3.3 in)
2001	52.8 mm (2.1 in)
2002	78.2 mm (3.1 in)
2003	80.3 mm (3.2 in)
2004	75.7 mm (3.0 in)
2005	80.5 mm (3.2 in)
2006	60.0 mm (2.4 in)
2007	96.0 mm (3.8 in)
2008	57.9 mm (2.3 in)
2009	63.0 mm (2.5 in)
2010	155.7 mm (6.1 in)
2011	45.2 mm (1.8 in)
2012	71.4 mm (2.8 in)
2013	61.2 mm (2.4 in)
2014	55.9 mm (2.2 in)
2015	56.1 mm (2.2 in)
2016	115.0 mm (4.5 in)
2017	59.7 mm (2.4 in)
2018	70.9 mm (2.8 in)
2019	64.5 mm (2.5 in)
2020	117.9 mm (4.6 in)
2021	35.8 mm (1.4 in)
2022	46.2 mm (1.8 in)
2023	75.7 mm (3.0 in)
2024	55.9 mm (2.2 in)
2025	63.2 mm (2.5 in)
2026	55.6 mm (2.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Walnut Grove, 1893 to 2026. The record is 197 days in 1972, marked on the chart; the median year is 64 days.

Longest dry spell (CDD) at Walnut Grove by year
Year	Longest dry spell (CDD)
1893	49 days
1894	49 days
1896	59 days
1897	69 days
1898	85 days
1899	143 days
1900	104 days
1901	70 days
1902	119 days
1903	92 days
1904	122 days
1905	89 days
1906	65 days
1907	51 days
1908	67 days
1909	93 days
1910	75 days
1911	84 days
1912	59 days
1913	73 days
1914	32 days
1915	47 days
1916	86 days
1917	48 days
1918	61 days
1919	38 days
1920	61 days
1921	35 days
1922	28 days
1923	62 days
1924	74 days
1925	65 days
1926	79 days
1927	53 days
1928	70 days
1929	95 days
1930	43 days
1931	27 days
1932	64 days
1933	51 days
1934	53 days
1935	61 days
1936	103 days
1937	54 days
1938	107 days
1939	48 days
1940	34 days
1941	28 days
1942	63 days
1943	116 days
1944	72 days
1945	88 days
1946	67 days
1947	72 days
1948	47 days
1949	28 days
1950	66 days
1951	58 days
1952	35 days
1953	54 days
1954	47 days
1955	40 days
1956	57 days
1957	41 days
1958	45 days
1959	62 days
1960	138 days
1961	69 days
1962	55 days
1963	96 days
1964	62 days
1965	59 days
1966	144 days
1967	79 days
1968	51 days
1969	66 days
1970	69 days
1971	53 days
1972	197 days
1973	73 days
1974	115 days
1975	83 days
1976	61 days
1977	51 days
1978	22 days
1979	50 days
1980	32 days
1981	55 days
1982	55 days
1983	69 days
1984	90 days
1985	77 days
1986	58 days
1987	55 days
1988	57 days
1989	69 days
1990	31 days
1991	64 days
1992	61 days
1993	69 days
1994	53 days
1995	55 days
1996	108 days
1997	60 days
1998	45 days
1999	99 days
2000	80 days
2001	45 days
2002	94 days
2003	95 days
2004	95 days
2005	74 days
2006	74 days
2007	113 days
2008	59 days
2009	60 days
2010	126 days
2011	40 days
2012	68 days
2013	97 days
2014	71 days
2015	38 days
2016	66 days
2017	109 days
2018	51 days
2019	51 days
2020	117 days
2021	56 days
2022	88 days
2023	68 days
2024	72 days
2025	68 days
2026	75 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

120 years, 1897 to 2025

A day with at least 44.9 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 89.8 mm (3.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Walnut Grove: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	44.9 mm (1.8 in)
5 years	58.7 mm (2.3 in)
10 years	67.0 mm (2.6 in)
25 years	76.8 mm (3.0 in)
50 years	83.5 mm (3.3 in)
100 years	89.8 mm (3.5 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 120 years of values from 1897 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 101.6 mm (4.0 in) in 1916; 92.7 mm (3.6 in) in 1970; 87.6 mm (3.4 in) in 2016.

Download the Data

Data for Walnut Grove standing records by year: CSV or JSON. Field meanings are on the data page.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-13. Last revised 13 October 2026 (2026-10-13).

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a