Walla Walla Post Office Weather Records (ASN00074117)

Record envelope, standing records and threshold days for Walla Walla Post Office (ASN00074117), Australia, with 93 years of record.

Key Facts for Walla Walla Post Office

Walla Walla Post Office (ASN00074117) is a weather station in Australia at -35.77 latitude and 146.90 longitude, 213 m (699 ft) above sea level.
The station reports from 1925 to 2017, 93 years of record.
0 records set at Walla Walla Post Office still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Walla Walla Post Office set a daily record precipitation of 44.8 mm (1.8 in) on 2 December 2017.

About the Station

Location: Australia, -35.77 latitude, 146.90 longitude.
Elevation: 213 m (699 ft).
Period of record: 1925 to 2017, 93 years.
Eligible elements: prcp.

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 Walla Walla Post Office. 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 Walla Walla Post Office, 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 Walla Walla Post Office still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Walla Walla Post Office between 8 November 2012 and 8 November 2012. Each dot is a new record.

Wettest Day of Each Month

Nov: 127.0 mm (5.0 in)

The wettest day on record for each calendar month at Walla Walla Post Office. The most was 127.0 mm (5.0 in) on 8 November 2012.

Record daily precipitation for each month at Walla Walla Post Office
Month	Record daily precipitation (mm)	Date
Jan	91.4 mm (3.6 in)	14 January 1925
Feb	99.8 mm (3.9 in)	28 February 1939
Mar	83.0 mm (3.3 in)	8 March 2010
Apr	108.0 mm (4.3 in)	28 April 1992
May	101.6 mm (4.0 in)	1 May 1942
Jun	53.3 mm (2.1 in)	24 June 1936
Jul	43.2 mm (1.7 in)	24 July 2003
Aug	60.8 mm (2.4 in)	26 August 1983
Sep	49.0 mm (1.9 in)	30 September 1963
Oct	114.6 mm (4.5 in)	21 October 1935
Nov	127.0 mm (5.0 in)	8 November 2012
Dec	78.2 mm (3.1 in)	18 December 1961

Latest Records

Latest records at Walla Walla Post Office
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
2 December 2017	Walla Walla Post Office, AU	daily rain	44.8 mm (1.8 in)	11.3 mm (0.4 in)	70 years	41 of 100 (Notable)
12 October 2017	Walla Walla Post Office, AU	daily rain	25.2 mm (1.0 in)	1.8 mm (0.07 in)	66 years	29 of 100 (Routine)
9 May 2016	Walla Walla Post Office, AU	daily rain	45.4 mm (1.8 in)	24.3 mm (1.0 in)	85 years	61 of 100 (Major)
1 February 2016	Walla Walla Post Office, AU	daily rain	22.6 mm (0.9 in)	14.2 mm (0.6 in)	21 years	20 of 100 (Routine)
27 January 2016	Walla Walla Post Office, AU	daily rain	28.8 mm (1.1 in)	16.9 mm (0.7 in)	46 years	36 of 100 (Notable)
6 November 2015	Walla Walla Post Office, AU	daily rain	26.0 mm (1.0 in)	0.3 mm (0.01 in)	72 years	30 of 100 (Routine)
1 November 2015	Walla Walla Post Office, AU	daily rain	33.8 mm (1.3 in)	11.8 mm (0.5 in)	17 years	25 of 100 (Routine)
3 September 2015	Walla Walla Post Office, AU	daily rain	26.0 mm (1.0 in)	3.4 mm (0.13 in)	68 years	33 of 100 (Routine)
19 June 2015	Walla Walla Post Office, AU	daily rain	26.2 mm (1.0 in)	6.4 mm (0.25 in)	84 years	42 of 100 (Notable)
18 April 2015	Walla Walla Post Office, AU	daily rain	29.4 mm (1.2 in)	5.5 mm (0.22 in)	82 years	38 of 100 (Notable)
10 September 2014	Walla Walla Post Office, AU	daily rain	10.6 mm (0.4 in)	2.0 mm (0.08 in)	28 years	19 of 100 (Routine)
11 April 2014	Walla Walla Post Office, AU	daily rain	49.2 mm (1.9 in)	30.2 mm (1.2 in)	40 years	49 of 100 (Notable)
25 January 2014	Walla Walla Post Office, AU	daily rain	31.5 mm (1.2 in)	4.3 mm (0.17 in)	72 years	33 of 100 (Routine)
5 December 2013	Walla Walla Post Office, AU	daily rain	29.6 mm (1.2 in)	6.5 mm (0.26 in)	47 years	28 of 100 (Routine)
2 June 2013	Walla Walla Post Office, AU	daily rain	44.8 mm (1.8 in)	27.5 mm (1.1 in)	40 years	58 of 100 (Notable)
8 November 2012	Walla Walla Post Office, AU	all-time rain	127.0 mm (5.0 in)	12.4 mm (0.5 in)	77 years	65 of 100 (Major)
25 May 2012	Walla Walla Post Office, AU	daily rain	32.2 mm (1.3 in)	8.6 mm (0.34 in)	8 years	19 of 100 (Routine)
4 March 2012	Walla Walla Post Office, AU	daily rain	78.7 mm (3.1 in)	46.9 mm (1.8 in)	53 years	63 of 100 (Major)
18 August 2011	Walla Walla Post Office, AU	daily rain	26.6 mm (1.0 in)	13.5 mm (0.5 in)	25 years	35 of 100 (Notable)
10 March 2011	Walla Walla Post Office, AU	daily rain	15.2 mm (0.6 in)	3.0 mm (0.12 in)	52 years	20 of 100 (Routine)

Extremes by Year

1925 to 2017

Yearly extremes at Walla Walla Post Office: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	127.0 mm (5.0 in)	2012	42.9 mm (1.7 in)	93
Wettest five days (Rx5day)	199.3 mm (7.8 in)	1925	70.6 mm (2.8 in)	93
Longest dry spell (CDD)	64 days	1926	31 days	93

Wettest day (Rx1day)

The wettest day of the year at Walla Walla Post Office, 1925 to 2017. The record is 127.0 mm (5.0 in) in 2012, marked on the chart; the median year is 42.9 mm (1.7 in).

Wettest day (Rx1day) at Walla Walla Post Office by year
Year	Wettest day (Rx1day)
1925	91.4 mm (3.6 in)
1926	50.3 mm (2.0 in)
1927	34.8 mm (1.4 in)
1928	42.9 mm (1.7 in)
1929	39.9 mm (1.6 in)
1930	50.0 mm (2.0 in)
1931	58.2 mm (2.3 in)
1932	27.2 mm (1.1 in)
1933	35.8 mm (1.4 in)
1934	49.8 mm (2.0 in)
1935	114.6 mm (4.5 in)
1936	53.3 mm (2.1 in)
1937	31.0 mm (1.2 in)
1938	33.5 mm (1.3 in)
1939	99.8 mm (3.9 in)
1940	35.3 mm (1.4 in)
1941	27.2 mm (1.1 in)
1942	101.6 mm (4.0 in)
1943	35.6 mm (1.4 in)
1944	25.7 mm (1.0 in)
1945	33.0 mm (1.3 in)
1946	44.7 mm (1.8 in)
1947	34.0 mm (1.3 in)
1948	80.8 mm (3.2 in)
1949	45.2 mm (1.8 in)
1950	28.7 mm (1.1 in)
1951	34.8 mm (1.4 in)
1952	34.3 mm (1.4 in)
1953	64.5 mm (2.5 in)
1954	90.9 mm (3.6 in)
1955	47.0 mm (1.9 in)
1956	56.4 mm (2.2 in)
1957	42.7 mm (1.7 in)
1958	53.1 mm (2.1 in)
1959	36.3 mm (1.4 in)
1960	72.9 mm (2.9 in)
1961	78.2 mm (3.1 in)
1962	31.8 mm (1.3 in)
1963	49.0 mm (1.9 in)
1964	44.7 mm (1.8 in)
1965	40.6 mm (1.6 in)
1966	37.3 mm (1.5 in)
1967	24.9 mm (1.0 in)
1968	43.7 mm (1.7 in)
1969	64.5 mm (2.5 in)
1970	54.4 mm (2.1 in)
1971	30.0 mm (1.2 in)
1972	34.0 mm (1.3 in)
1973	53.8 mm (2.1 in)
1974	66.8 mm (2.6 in)
1975	36.2 mm (1.4 in)
1976	30.8 mm (1.2 in)
1977	31.2 mm (1.2 in)
1978	48.4 mm (1.9 in)
1979	38.8 mm (1.5 in)
1980	27.3 mm (1.1 in)
1981	41.6 mm (1.6 in)
1982	34.2 mm (1.3 in)
1983	60.8 mm (2.4 in)
1984	57.8 mm (2.3 in)
1985	31.6 mm (1.2 in)
1986	33.6 mm (1.3 in)
1987	30.1 mm (1.2 in)
1988	37.6 mm (1.5 in)
1989	66.1 mm (2.6 in)
1990	53.0 mm (2.1 in)
1991	46.4 mm (1.8 in)
1992	108.0 mm (4.3 in)
1993	39.2 mm (1.5 in)
1994	29.4 mm (1.2 in)
1995	42.4 mm (1.7 in)
1996	42.8 mm (1.7 in)
1997	29.8 mm (1.2 in)
1998	34.4 mm (1.4 in)
1999	36.4 mm (1.4 in)
2000	61.3 mm (2.4 in)
2001	63.8 mm (2.5 in)
2002	44.0 mm (1.7 in)
2003	43.2 mm (1.7 in)
2004	32.0 mm (1.3 in)
2005	48.0 mm (1.9 in)
2006	23.0 mm (0.9 in)
2007	52.6 mm (2.1 in)
2008	32.8 mm (1.3 in)
2009	22.0 mm (0.9 in)
2010	83.0 mm (3.3 in)
2011	53.0 mm (2.1 in)
2012	127.0 mm (5.0 in)
2013	44.8 mm (1.8 in)
2014	49.2 mm (1.9 in)
2015	33.8 mm (1.3 in)
2016	45.4 mm (1.8 in)
2017	44.8 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Walla Walla Post Office, 1925 to 2017. The record is 199.3 mm (7.8 in) in 1925, marked on the chart; the median year is 70.6 mm (2.8 in).

Wettest five days (Rx5day) at Walla Walla Post Office by year
Year	Wettest five days (Rx5day)
1925	199.3 mm (7.8 in)
1926	86.6 mm (3.4 in)
1927	58.5 mm (2.3 in)
1928	83.5 mm (3.3 in)
1929	97.1 mm (3.8 in)
1930	90.4 mm (3.6 in)
1931	100.1 mm (3.9 in)
1932	53.9 mm (2.1 in)
1933	85.1 mm (3.4 in)
1934	116.6 mm (4.6 in)
1935	167.0 mm (6.6 in)
1936	67.0 mm (2.6 in)
1937	68.8 mm (2.7 in)
1938	33.8 mm (1.3 in)
1939	145.3 mm (5.7 in)
1940	43.4 mm (1.7 in)
1941	41.1 mm (1.6 in)
1942	164.1 mm (6.5 in)
1943	57.7 mm (2.3 in)
1944	51.8 mm (2.0 in)
1945	77.2 mm (3.0 in)
1946	82.0 mm (3.2 in)
1947	46.7 mm (1.8 in)
1948	99.1 mm (3.9 in)
1949	59.7 mm (2.4 in)
1950	75.2 mm (3.0 in)
1951	61.4 mm (2.4 in)
1952	47.2 mm (1.9 in)
1953	76.7 mm (3.0 in)
1954	90.9 mm (3.6 in)
1955	74.2 mm (2.9 in)
1956	77.8 mm (3.1 in)
1957	60.2 mm (2.4 in)
1958	54.4 mm (2.1 in)
1959	65.6 mm (2.6 in)
1960	72.9 mm (2.9 in)
1961	109.2 mm (4.3 in)
1962	52.3 mm (2.1 in)
1963	66.3 mm (2.6 in)
1964	76.0 mm (3.0 in)
1965	47.7 mm (1.9 in)
1966	73.4 mm (2.9 in)
1967	29.5 mm (1.2 in)
1968	71.6 mm (2.8 in)
1969	74.9 mm (2.9 in)
1970	88.5 mm (3.5 in)
1971	62.0 mm (2.4 in)
1972	45.9 mm (1.8 in)
1973	97.1 mm (3.8 in)
1974	100.1 mm (3.9 in)
1975	63.4 mm (2.5 in)
1976	64.5 mm (2.5 in)
1977	54.0 mm (2.1 in)
1978	63.4 mm (2.5 in)
1979	63.9 mm (2.5 in)
1980	41.9 mm (1.6 in)
1981	67.8 mm (2.7 in)
1982	40.8 mm (1.6 in)
1983	55.2 mm (2.2 in)
1984	72.8 mm (2.9 in)
1985	50.2 mm (2.0 in)
1986	82.5 mm (3.2 in)
1987	96.8 mm (3.8 in)
1988	84.2 mm (3.3 in)
1989	102.7 mm (4.0 in)
1990	59.6 mm (2.3 in)
1991	76.2 mm (3.0 in)
1992	120.3 mm (4.7 in)
1993	92.6 mm (3.6 in)
1994	42.3 mm (1.7 in)
1995	71.8 mm (2.8 in)
1996	65.4 mm (2.6 in)
1997	47.6 mm (1.9 in)
1998	55.4 mm (2.2 in)
1999	77.2 mm (3.0 in)
2000	65.5 mm (2.6 in)
2001	73.4 mm (2.9 in)
2002	54.4 mm (2.1 in)
2003	61.0 mm (2.4 in)
2004	45.2 mm (1.8 in)
2005	76.0 mm (3.0 in)
2006	31.8 mm (1.3 in)
2007	70.6 mm (2.8 in)
2008	47.8 mm (1.9 in)
2009	48.8 mm (1.9 in)
2010	137.0 mm (5.4 in)
2011	112.8 mm (4.4 in)
2012	153.0 mm (6.0 in)
2013	78.4 mm (3.1 in)
2014	67.2 mm (2.6 in)
2015	76.4 mm (3.0 in)
2016	70.4 mm (2.8 in)
2017	86.8 mm (3.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Walla Walla Post Office, 1925 to 2017. The record is 64 days in 1926, marked on the chart; the median year is 31 days.

Longest dry spell (CDD) at Walla Walla Post Office by year
Year	Longest dry spell (CDD)
1925	41 days
1926	64 days
1927	23 days
1928	22 days
1929	30 days
1930	43 days
1931	27 days
1932	26 days
1933	32 days
1934	38 days
1935	28 days
1936	22 days
1937	31 days
1938	50 days
1939	38 days
1940	43 days
1941	29 days
1942	24 days
1943	24 days
1944	38 days
1945	37 days
1946	29 days
1947	27 days
1948	54 days
1949	25 days
1950	34 days
1951	37 days
1952	44 days
1953	32 days
1954	22 days
1955	24 days
1956	31 days
1957	38 days
1958	27 days
1959	23 days
1960	21 days
1961	45 days
1962	36 days
1963	29 days
1964	31 days
1965	46 days
1966	26 days
1967	33 days
1968	37 days
1969	18 days
1970	37 days
1971	19 days
1972	30 days
1973	16 days
1974	15 days
1975	24 days
1976	20 days
1977	27 days
1978	50 days
1979	20 days
1980	39 days
1981	30 days
1982	38 days
1983	38 days
1984	21 days
1985	44 days
1986	51 days
1987	37 days
1988	34 days
1989	26 days
1990	27 days
1991	37 days
1992	32 days
1993	37 days
1994	34 days
1995	57 days
1996	24 days
1997	24 days
1998	29 days
1999	20 days
2000	26 days
2001	31 days
2002	27 days
2003	50 days
2004	44 days
2005	38 days
2006	47 days
2007	29 days
2008	25 days
2009	48 days
2010	30 days
2011	21 days
2012	35 days
2013	24 days
2014	29 days
2015	35 days
2016	44 days
2017	21 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

88 years, 1925 to 2015

A day with at least 41.9 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 128.2 mm (5.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Walla Walla Post Office: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	41.9 mm (1.6 in)
5 years	58.1 mm (2.3 in)
10 years	71.1 mm (2.8 in)
25 years	90.9 mm (3.6 in)
50 years	108.2 mm (4.3 in)
100 years	128.2 mm (5.0 in)	Longer than the 88 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 88 years of values from 1925 to 2015.

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: 114.6 mm (4.5 in) in 1935; 108.0 mm (4.3 in) in 1992; 101.6 mm (4.0 in) in 1942.

Download the Data

Data for Walla Walla Post Office standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Walla Walla Post Office 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

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