Mount Barker Weather Records (ASN00023733)

Record envelope, standing records and threshold days for Mount Barker (ASN00023733), Australia, with 157 years of record.

Key Facts for Mount Barker

Mount Barker (ASN00023733) is a weather station in Australia at -35.06 latitude and 138.85 longitude, 360 m (1,181 ft) above sea level.
The station reports from 1870 to 2026, 157 years of record.
1,464 records set at Mount Barker still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Mount Barker set a daily record high minimum temperature of 15.0 C (59.0 F) on 1 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Australia, -35.06 latitude, 138.85 longitude.
Elevation: 360 m (1,181 ft).
Period of record: 1870 to 2026, 157 years.
Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

9 days at or beyond a record

The band shows the record high and record low for each calendar day at Mount Barker. The lines show the 2026 daily maximum and minimum. 9 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Mount Barker, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	44.5 C (112.1 F)	3.6 C (38.5 F)	43.4 C (110.1 F)	7.6 C (45.7 F)
Feb	43.0 C (109.4 F)	3.3 C (37.9 F)	35.7 C (96.3 F)	7.1 C (44.8 F)
Mar	40.7 C (105.3 F)	1.7 C (35.1 F)	33.2 C (91.8 F)	8.1 C (46.6 F)
Apr	36.0 C (96.8 F)	-1.1 C (30.0 F)	29.0 C (84.2 F)	3.5 C (38.3 F)
May	28.9 C (84.0 F)	-3.7 C (25.3 F)	27.4 C (81.3 F)	3.7 C (38.7 F)
Jun	24.2 C (75.6 F)	-4.4 C (24.1 F)	20.5 C (68.9 F)	0.9 C (33.6 F)
Jul	23.8 C (74.8 F)	-5.6 C (21.9 F)	20.5 C (68.9 F)	0.0 C (32.0 F)
Aug	27.2 C (81.0 F)	-3.6 C (25.5 F)	20.8 C (69.4 F)	-0.4 C (31.3 F)
Sep	31.1 C (88.0 F)	-1.8 C (28.8 F)	31.5 C (88.7 F)	2.2 C (36.0 F)
Oct	35.3 C (95.5 F)	-1.2 C (29.8 F)	19.0 C (66.2 F)	11.1 C (52.0 F)
Nov	40.6 C (105.1 F)	-1.1 C (30.0 F)	n/a	n/a
Dec	42.5 C (108.5 F)	1.7 C (35.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mount Barker still stand. 1957 holds the most, with 42.

Standing records at Mount Barker by the year they were set
Year set	Standing records
1957	42
1958	40
1959	33
1960	40
1961	26
1962	21
1963	20
1964	28
1965	40
1966	22
1967	22
1968	26
1969	25
1970	36
1971	15
1972	23
1973	16
1974	9
1975	25
1976	22
1977	31
1978	18
1979	19
1980	21
1981	25
1982	39
1983	27
1984	18
1985	20
1986	20
1987	24
1988	12
1989	13
1990	14
1991	16
1992	13
1993	15
1994	33
1995	16
1996	9
1997	19
1998	13
1999	15
2000	16
2001	15
2002	17
2003	7
2004	13
2005	30
2006	18
2007	23
2008	16
2009	29
2010	18
2011	17
2012	17
2013	16
2014	27
2015	27
2016	14
2017	21
2018	18
2019	35
2020	12
2021	6
2022	6
2023	11
2024	19
2025	17
2026	18

All-Time Record Progression

4 new records

4 all-time records were set at Mount Barker between 25 January 1941 and 28 January 2009. Each dot is a new record.

When Mount Barker set new all-time records
Date	Kind	Detail
1941-01-25	Record daily precipitation	Record daily precipitation 94.2 mm (3.7 in)
1946-02-18	Record daily precipitation	Record daily precipitation 129.3 mm (5.1 in)
1970-04-10	Record daily precipitation	Record daily precipitation 129.8 mm (5.1 in)
2009-01-28	Record high maximum temperature	Record high maximum temperature 44.5 C (112.1 F)

Wettest Day of Each Month

Apr: 129.8 mm (5.1 in)

The wettest day on record for each calendar month at Mount Barker. The most was 129.8 mm (5.1 in) on 10 April 1970.

Record daily precipitation for each month at Mount Barker
Month	Record daily precipitation (mm)	Date
Jan	94.2 mm (3.7 in)	25 January 1941
Feb	129.3 mm (5.1 in)	18 February 1946
Mar	74.2 mm (2.9 in)	16 March 1985
Apr	129.8 mm (5.1 in)	10 April 1970
May	81.5 mm (3.2 in)	10 May 1911
Jun	56.8 mm (2.2 in)	7 June 1994
Jul	70.2 mm (2.8 in)	8 July 1993
Aug	57.2 mm (2.3 in)	30 August 1992
Sep	64.3 mm (2.5 in)	16 September 1935
Oct	97.0 mm (3.8 in)	27 October 1963
Nov	58.7 mm (2.3 in)	18 November 1964
Dec	76.0 mm (3.0 in)	28 December 2016

Period of Record Coverage

1957 to 2026

70 years of record at Mount Barker, 1957 to 2026. 4 years have data for under 90 percent of days and are left out of rankings: 1963, 1987, 1988, 2026.

Days with data per year at Mount Barker
Year	Days with data	Share of year	Complete
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	304	83%	No
1964	352	96%	Yes
1965	362	99%	Yes
1966	357	98%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	363	99%	Yes
1973	365	100%	Yes
1974	363	99%	Yes
1975	362	99%	Yes
1976	366	100%	Yes
1977	364	100%	Yes
1978	365	100%	Yes
1979	359	98%	Yes
1980	366	100%	Yes
1981	363	99%	Yes
1982	365	100%	Yes
1983	362	99%	Yes
1984	363	99%	Yes
1985	361	99%	Yes
1986	351	96%	Yes
1987	296	81%	No
1988	307	84%	No
1989	334	92%	Yes
1990	353	97%	Yes
1991	364	100%	Yes
1992	362	99%	Yes
1993	361	99%	Yes
1994	363	99%	Yes
1995	364	100%	Yes
1996	357	98%	Yes
1997	358	98%	Yes
1998	365	100%	Yes
1999	364	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	362	99%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	363	99%	Yes
2007	363	99%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	363	99%	Yes
2011	351	96%	Yes
2012	353	96%	Yes
2013	352	96%	Yes
2014	352	96%	Yes
2015	350	96%	Yes
2016	350	96%	Yes
2017	360	99%	Yes
2018	350	96%	Yes
2019	342	94%	Yes
2020	352	96%	Yes
2021	357	98%	Yes
2022	343	94%	Yes
2023	344	94%	Yes
2024	335	92%	Yes
2025	342	94%	Yes
2026	263	72%	No

Latest Records

Latest records at Mount Barker
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 October 2026	Mount Barker, AU	daily high min (Provisional)	15.0 C (59.0 F)	1.4 C (2.5 F)	28 years	19 of 100 (Routine)
30 September 2026	Mount Barker, AU	daily high min (Provisional)	14.9 C (58.8 F)	0.4 C (0.7 F)	16 years	13 of 100 (Routine)
29 September 2026	Mount Barker, AU	monthly high max (Provisional)	31.5 C (88.7 F)	0.4 C (0.7 F)	64 years	36 of 100 (Notable)
9 August 2026	Mount Barker, AU	daily high min (Tie)	10.8 C (51.4 F)	tie	9 years	2 of 100 (Routine)
18 July 2026	Mount Barker, AU	daily high max	19.1 C (66.4 F)	0.4 C (0.7 F)	44 years	21 of 100 (Routine)
17 July 2026	Mount Barker, AU	daily high max	20.5 C (68.9 F)	1.0 C (1.8 F)	25 years	18 of 100 (Routine)
16 July 2026	Mount Barker, AU	daily high max	18.4 C (65.1 F)	0.1 C (0.2 F)	36 years	17 of 100 (Routine)
11 July 2026	Mount Barker, AU	daily high min	10.3 C (50.5 F)	0.3 C (0.5 F)	16 years	12 of 100 (Routine)
2 July 2026	Mount Barker, AU	daily rain	56.6 mm (2.2 in)	22.4 mm (0.9 in)	44 years	53 of 100 (Notable)
17 June 2026	Mount Barker, AU	daily high min	14.0 C (57.2 F)	2.3 C (4.1 F)	64 years	32 of 100 (Routine)
13 June 2026	Mount Barker, AU	daily high min (Tie)	12.5 C (54.5 F)	tie	37 years	4 of 100 (Routine)
2 June 2026	Mount Barker, AU	daily high min	12.1 C (53.8 F)	0.9 C (1.6 F)	35 years	19 of 100 (Routine)
16 May 2026	Mount Barker, AU	daily high min (Tie)	13.5 C (56.3 F)	tie	12 years	2 of 100 (Routine)
15 May 2026	Mount Barker, AU	daily high min	14.8 C (58.6 F)	0.8 C (1.4 F)	12 years	12 of 100 (Routine)
2 May 2026	Mount Barker, AU	monthly high min	18.9 C (66.0 F)	1.3 C (2.3 F)	38 years	31 of 100 (Routine)
1 May 2026	Mount Barker, AU	daily high max	27.4 C (81.3 F)	0.8 C (1.4 F)	53 years	25 of 100 (Routine)
30 April 2026	Mount Barker, AU	daily high max	27.7 C (81.9 F)	1.8 C (3.2 F)	4 years	11 of 100 (Routine)
24 March 2026	Mount Barker, AU	daily high min	17.5 C (63.5 F)	0.8 C (1.4 F)	8 years	11 of 100 (Routine)
17 March 2026	Mount Barker, AU	daily rain	18.0 mm (0.7 in)	0.4 mm (0.02 in)	24 years	17 of 100 (Routine)
1 March 2026	Mount Barker, AU	daily high min	19.8 C (67.6 F)	1.9 C (3.4 F)	36 years	23 of 100 (Routine)

Climate Trend

67 complete years, 1957 to 2024

One stripe for each of 67 complete years at Mount Barker, 1957 to 2024. Blue stripes are years cooler than the station's own mean of 14.4 C (57.9 F); red stripes are warmer. The coolest year was 1958, at 13.1 C (55.6 F), and the warmest was 2019, at 15.6 C (60.1 F). The strongest colour marks a difference of 1.3 C (2.3 F).

Annual mean temperature at Mount Barker as warming stripes, 1957 to 2024
Year	Annual mean temperature	Difference from the station mean
1957	13.5 C	-0.87 C
1958	13.1 C	-1.27 C
1959	13.9 C	-0.47 C
1960	13.3 C	-1.06 C
1961	14.5 C	+0.07 C
1962	14.0 C	-0.38 C
1964	13.2 C	-1.18 C
1965	13.9 C	-0.54 C
1966	13.4 C	-1.05 C
1967	13.7 C	-0.69 C
1968	13.9 C	-0.46 C
1969	13.5 C	-0.94 C
1970	13.3 C	-1.11 C
1971	13.9 C	-0.53 C
1972	13.9 C	-0.51 C
1973	14.4 C	+0.04 C
1974	14.0 C	-0.37 C
1975	14.3 C	-0.10 C
1976	13.7 C	-0.75 C
1977	14.1 C	-0.32 C
1978	13.7 C	-0.67 C
1979	14.3 C	-0.11 C
1980	14.4 C	-0.05 C
1981	14.4 C	-0.04 C
1982	14.3 C	-0.10 C
1983	13.9 C	-0.49 C
1984	13.8 C	-0.63 C
1985	14.0 C	-0.45 C
1986	13.9 C	-0.49 C
1987	14.0 C	-0.40 C
1988	15.0 C	+0.62 C
1989	14.3 C	-0.08 C
1990	14.7 C	+0.34 C
1991	14.6 C	+0.21 C
1992	13.8 C	-0.64 C
1993	14.6 C	+0.22 C
1994	14.2 C	-0.20 C
1995	14.2 C	-0.21 C
1996	14.1 C	-0.31 C
1997	14.5 C	+0.07 C
1998	14.4 C	-0.02 C
1999	14.8 C	+0.38 C
2000	15.1 C	+0.72 C
2001	14.8 C	+0.36 C
2002	14.6 C	+0.22 C
2003	14.4 C	+0.01 C
2004	14.6 C	+0.15 C
2005	15.0 C	+0.56 C
2006	14.6 C	+0.16 C
2007	15.6 C	+1.18 C
2008	14.6 C	+0.20 C
2009	15.5 C	+1.07 C
2010	14.8 C	+0.36 C
2011	14.7 C	+0.25 C
2012	14.6 C	+0.21 C
2013	15.3 C	+0.94 C
2014	15.5 C	+1.08 C
2015	15.2 C	+0.76 C
2016	15.3 C	+0.86 C
2017	15.5 C	+1.14 C
2018	15.5 C	+1.10 C
2019	15.6 C	+1.22 C
2020	14.7 C	+0.27 C
2021	14.7 C	+0.27 C
2022	14.9 C	+0.51 C
2023	15.1 C	+0.67 C
2024	15.5 C	+1.14 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.3) per decade over 1957 to 2024. In Fahrenheit: 0.5 F (0.4 to 0.6) per decade. The slope is a straight line fitted to 67 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Mount Barker
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.2 to 0.3) per decade	0.5 F (0.4 to 0.6) per decade	1957 to 2024	67	Rise
Mean daily maximum	0.3 C (0.2 to 0.4) per decade	0.5 F (0.4 to 0.7) per decade	1957 to 2024	67	Rise
Mean daily minimum	0.2 C (0.2 to 0.3) per decade	0.4 F (0.4 to 0.5) per decade	1957 to 2024	67	Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1870 to 2026

Yearly extremes at Mount Barker: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	44.5 C (112.1 F)	2009	40.0 C (104.0 F)	70
Coldest night (TNn)	-5.6 C (21.9 F)	1959	-1.7 C (28.9 F)	70
Wettest day (Rx1day)	129.8 mm (5.1 in)	1970	41.3 mm (1.6 in)	146
Wettest five days (Rx5day)	173.5 mm (6.8 in)	1910	78.8 mm (3.1 in)	146
Longest dry spell (CDD)	89 days	1986	28 days	146

Hottest day (TXx)

The hottest day of the year at Mount Barker, 1870 to 2026. The record is 44.5 C (112.1 F) in 2009, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Mount Barker by year
Year	Hottest day (TXx)
1870	n/a
1878	n/a
1882	n/a
1884	n/a
1885	n/a
1886	n/a
1887	n/a
1888	n/a
1889	n/a
1890	n/a
1891	n/a
1892	n/a
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	39.4 C (102.9 F)
1958	36.7 C (98.1 F)
1959	41.7 C (107.1 F)
1960	39.4 C (102.9 F)
1961	40.6 C (105.1 F)
1962	40.6 C (105.1 F)
1963	37.8 C (100.0 F)
1964	38.9 C (102.0 F)
1965	37.8 C (100.0 F)
1966	37.8 C (100.0 F)
1967	39.4 C (102.9 F)
1968	41.8 C (107.2 F)
1969	38.9 C (102.0 F)
1970	40.1 C (104.2 F)
1971	39.1 C (102.4 F)
1972	39.4 C (102.9 F)
1973	39.8 C (103.6 F)
1974	35.9 C (96.6 F)
1975	39.4 C (102.9 F)
1976	39.7 C (103.5 F)
1977	39.9 C (103.8 F)
1978	37.7 C (99.9 F)
1979	40.6 C (105.1 F)
1980	40.8 C (105.4 F)
1981	41.8 C (107.2 F)
1982	43.0 C (109.4 F)
1983	41.8 C (107.2 F)
1984	36.5 C (97.7 F)
1985	41.0 C (105.8 F)
1986	40.7 C (105.3 F)
1987	38.2 C (100.8 F)
1988	38.3 C (100.9 F)
1989	38.2 C (100.8 F)
1990	39.9 C (103.8 F)
1991	40.0 C (104.0 F)
1992	38.5 C (101.3 F)
1993	39.7 C (103.5 F)
1994	40.0 C (104.0 F)
1995	38.4 C (101.1 F)
1996	41.2 C (106.2 F)
1997	40.1 C (104.2 F)
1998	38.8 C (101.8 F)
1999	39.3 C (102.7 F)
2000	39.9 C (103.8 F)
2001	41.8 C (107.2 F)
2002	40.0 C (104.0 F)
2003	42.7 C (108.9 F)
2004	41.5 C (106.7 F)
2005	39.5 C (103.1 F)
2006	40.8 C (105.4 F)
2007	41.3 C (106.3 F)
2008	40.5 C (104.9 F)
2009	44.5 C (112.1 F)
2010	41.0 C (105.8 F)
2011	40.0 C (104.0 F)
2012	40.5 C (104.9 F)
2013	42.7 C (108.9 F)
2014	43.0 C (109.4 F)
2015	41.2 C (106.2 F)
2016	38.7 C (101.7 F)
2017	40.0 C (104.0 F)
2018	42.1 C (107.8 F)
2019	44.5 C (112.1 F)
2020	41.0 C (105.8 F)
2021	41.0 C (105.8 F)
2022	37.9 C (100.2 F)
2023	37.9 C (100.2 F)
2024	38.7 C (101.7 F)
2025	40.8 C (105.4 F)
2026	43.4 C (110.1 F)

Coldest night (TNn)

The coldest night of the year at Mount Barker, 1870 to 2026. The record is -5.6 C (21.9 F) in 1959, marked on the chart; the median year is -1.7 C (28.9 F).

Coldest night (TNn) at Mount Barker by year
Year	Coldest night (TNn)
1870	n/a
1878	n/a
1882	n/a
1884	n/a
1885	n/a
1886	n/a
1887	n/a
1888	n/a
1889	n/a
1890	n/a
1891	n/a
1892	n/a
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	-3.9 C (25.0 F)
1958	-4.4 C (24.1 F)
1959	-5.6 C (21.9 F)
1960	-2.8 C (27.0 F)
1961	-3.3 C (26.1 F)
1962	-1.7 C (28.9 F)
1963	-3.6 C (25.5 F)
1964	-3.9 C (25.0 F)
1965	-3.9 C (25.0 F)
1966	-2.2 C (28.0 F)
1967	-3.3 C (26.1 F)
1968	-3.3 C (26.1 F)
1969	-2.2 C (28.0 F)
1970	-2.2 C (28.0 F)
1971	-2.4 C (27.7 F)
1972	-4.2 C (24.4 F)
1973	-3.7 C (25.3 F)
1974	-2.3 C (27.9 F)
1975	-2.3 C (27.9 F)
1976	-1.8 C (28.8 F)
1977	-2.8 C (27.0 F)
1978	-2.5 C (27.5 F)
1979	-2.1 C (28.2 F)
1980	-1.7 C (28.9 F)
1981	-0.6 C (30.9 F)
1982	-4.3 C (24.3 F)
1983	-2.8 C (27.0 F)
1984	-2.4 C (27.7 F)
1985	-2.4 C (27.7 F)
1986	-1.8 C (28.8 F)
1987	-1.7 C (28.9 F)
1988	-1.6 C (29.1 F)
1989	-2.8 C (27.0 F)
1990	-1.4 C (29.5 F)
1991	-1.6 C (29.1 F)
1992	-1.4 C (29.5 F)
1993	-0.8 C (30.6 F)
1994	-2.4 C (27.7 F)
1995	-1.3 C (29.7 F)
1996	-1.0 C (30.2 F)
1997	-1.3 C (29.7 F)
1998	-1.3 C (29.7 F)
1999	-1.4 C (29.5 F)
2000	-0.3 C (31.5 F)
2001	0.5 C (32.9 F)
2002	-2.2 C (28.0 F)
2003	-1.5 C (29.3 F)
2004	-0.6 C (30.9 F)
2005	-0.2 C (31.6 F)
2006	-3.0 C (26.6 F)
2007	-2.4 C (27.7 F)
2008	-1.9 C (28.6 F)
2009	-0.5 C (31.1 F)
2010	-1.2 C (29.8 F)
2011	-2.5 C (27.5 F)
2012	-0.3 C (31.5 F)
2013	1.2 C (34.2 F)
2014	-1.4 C (29.5 F)
2015	-1.7 C (28.9 F)
2016	0.0 C (32.0 F)
2017	0.5 C (32.9 F)
2018	-1.5 C (29.3 F)
2019	-1.7 C (28.9 F)
2020	-1.2 C (29.8 F)
2021	-0.3 C (31.5 F)
2022	-1.0 C (30.2 F)
2023	-0.3 C (31.5 F)
2024	-0.7 C (30.7 F)
2025	0.0 C (32.0 F)
2026	-0.4 C (31.3 F)

Wettest day (Rx1day)

The wettest day of the year at Mount Barker, 1870 to 2026. The record is 129.8 mm (5.1 in) in 1970, marked on the chart; the median year is 41.3 mm (1.6 in).

Wettest day (Rx1day) at Mount Barker by year
Year	Wettest day (Rx1day)
1870	0.0 mm (0.00 in)
1878	0.0 mm (0.00 in)
1882	0.0 mm (0.00 in)
1884	45.2 mm (1.8 in)
1885	33.0 mm (1.3 in)
1886	31.8 mm (1.3 in)
1887	40.6 mm (1.6 in)
1888	40.6 mm (1.6 in)
1889	72.4 mm (2.9 in)
1890	52.3 mm (2.1 in)
1891	37.1 mm (1.5 in)
1892	41.7 mm (1.6 in)
1893	45.5 mm (1.8 in)
1894	40.4 mm (1.6 in)
1895	31.8 mm (1.3 in)
1896	40.9 mm (1.6 in)
1897	34.3 mm (1.4 in)
1898	44.5 mm (1.8 in)
1899	27.9 mm (1.1 in)
1900	47.5 mm (1.9 in)
1901	52.3 mm (2.1 in)
1902	43.2 mm (1.7 in)
1903	43.2 mm (1.7 in)
1904	49.5 mm (1.9 in)
1905	38.1 mm (1.5 in)
1906	50.0 mm (2.0 in)
1907	31.0 mm (1.2 in)
1908	44.2 mm (1.7 in)
1909	51.3 mm (2.0 in)
1910	67.3 mm (2.6 in)
1911	81.5 mm (3.2 in)
1912	30.0 mm (1.2 in)
1913	52.8 mm (2.1 in)
1914	26.4 mm (1.0 in)
1915	52.8 mm (2.1 in)
1916	32.5 mm (1.3 in)
1917	41.7 mm (1.6 in)
1918	34.3 mm (1.4 in)
1919	36.1 mm (1.4 in)
1920	47.0 mm (1.9 in)
1921	57.4 mm (2.3 in)
1922	45.5 mm (1.8 in)
1923	45.7 mm (1.8 in)
1924	36.8 mm (1.4 in)
1925	35.1 mm (1.4 in)
1926	38.1 mm (1.5 in)
1927	44.7 mm (1.8 in)
1928	39.4 mm (1.6 in)
1929	48.5 mm (1.9 in)
1930	36.1 mm (1.4 in)
1931	28.2 mm (1.1 in)
1932	47.8 mm (1.9 in)
1933	48.3 mm (1.9 in)
1934	46.5 mm (1.8 in)
1935	64.3 mm (2.5 in)
1936	32.0 mm (1.3 in)
1937	33.0 mm (1.3 in)
1938	77.7 mm (3.1 in)
1939	40.9 mm (1.6 in)
1940	26.4 mm (1.0 in)
1941	94.2 mm (3.7 in)
1942	50.8 mm (2.0 in)
1943	34.5 mm (1.4 in)
1944	44.2 mm (1.7 in)
1945	34.5 mm (1.4 in)
1946	129.3 mm (5.1 in)
1947	36.8 mm (1.4 in)
1948	45.5 mm (1.8 in)
1949	33.0 mm (1.3 in)
1950	38.1 mm (1.5 in)
1951	37.6 mm (1.5 in)
1952	38.6 mm (1.5 in)
1953	39.4 mm (1.6 in)
1954	36.8 mm (1.4 in)
1955	41.7 mm (1.6 in)
1956	45.0 mm (1.8 in)
1957	36.6 mm (1.4 in)
1958	73.9 mm (2.9 in)
1959	34.8 mm (1.4 in)
1960	47.0 mm (1.9 in)
1961	42.2 mm (1.7 in)
1962	37.3 mm (1.5 in)
1963	97.0 mm (3.8 in)
1964	58.7 mm (2.3 in)
1965	29.2 mm (1.1 in)
1966	35.8 mm (1.4 in)
1967	27.7 mm (1.1 in)
1968	48.3 mm (1.9 in)
1969	113.8 mm (4.5 in)
1970	129.8 mm (5.1 in)
1971	78.5 mm (3.1 in)
1972	26.7 mm (1.1 in)
1973	52.1 mm (2.1 in)
1974	63.0 mm (2.5 in)
1975	51.8 mm (2.0 in)
1976	51.6 mm (2.0 in)
1977	36.8 mm (1.4 in)
1978	38.6 mm (1.5 in)
1979	29.6 mm (1.2 in)
1980	45.6 mm (1.8 in)
1981	34.2 mm (1.3 in)
1982	20.6 mm (0.8 in)
1983	37.2 mm (1.5 in)
1984	37.2 mm (1.5 in)
1985	74.2 mm (2.9 in)
1986	63.0 mm (2.5 in)
1987	54.8 mm (2.2 in)
1988	61.0 mm (2.4 in)
1989	45.2 mm (1.8 in)
1990	37.0 mm (1.5 in)
1991	34.4 mm (1.4 in)
1992	62.2 mm (2.4 in)
1993	70.2 mm (2.8 in)
1994	56.8 mm (2.2 in)
1995	31.6 mm (1.2 in)
1996	36.0 mm (1.4 in)
1997	54.8 mm (2.2 in)
1998	53.6 mm (2.1 in)
1999	35.0 mm (1.4 in)
2000	56.5 mm (2.2 in)
2001	38.4 mm (1.5 in)
2002	35.4 mm (1.4 in)
2003	40.0 mm (1.6 in)
2004	28.6 mm (1.1 in)
2005	34.6 mm (1.4 in)
2006	49.6 mm (2.0 in)
2007	52.2 mm (2.1 in)
2008	33.4 mm (1.3 in)
2009	38.6 mm (1.5 in)
2010	45.4 mm (1.8 in)
2011	59.8 mm (2.4 in)
2012	35.2 mm (1.4 in)
2013	34.0 mm (1.3 in)
2014	58.6 mm (2.3 in)
2015	27.4 mm (1.1 in)
2016	76.0 mm (3.0 in)
2017	33.6 mm (1.3 in)
2018	33.2 mm (1.3 in)
2019	44.6 mm (1.8 in)
2020	54.0 mm (2.1 in)
2021	33.4 mm (1.3 in)
2022	56.0 mm (2.2 in)
2023	42.2 mm (1.7 in)
2024	35.0 mm (1.4 in)
2025	36.6 mm (1.4 in)
2026	56.6 mm (2.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mount Barker, 1870 to 2026. The record is 173.5 mm (6.8 in) in 1910, marked on the chart; the median year is 78.8 mm (3.1 in).

Wettest five days (Rx5day) at Mount Barker by year
Year	Wettest five days (Rx5day)
1870	0.0 mm (0.00 in)
1878	0.0 mm (0.00 in)
1882	0.0 mm (0.00 in)
1884	97.5 mm (3.8 in)
1885	69.3 mm (2.7 in)
1886	62.3 mm (2.5 in)
1887	94.8 mm (3.7 in)
1888	100.3 mm (3.9 in)
1889	111.8 mm (4.4 in)
1890	133.1 mm (5.2 in)
1891	84.3 mm (3.3 in)
1892	84.3 mm (3.3 in)
1893	138.7 mm (5.5 in)
1894	94.3 mm (3.7 in)
1895	46.1 mm (1.8 in)
1896	73.7 mm (2.9 in)
1897	53.6 mm (2.1 in)
1898	91.3 mm (3.6 in)
1899	65.5 mm (2.6 in)
1900	108.7 mm (4.3 in)
1901	82.3 mm (3.2 in)
1902	86.4 mm (3.4 in)
1903	85.8 mm (3.4 in)
1904	76.9 mm (3.0 in)
1905	68.3 mm (2.7 in)
1906	73.6 mm (2.9 in)
1907	51.6 mm (2.0 in)
1908	78.2 mm (3.1 in)
1909	106.0 mm (4.2 in)
1910	173.5 mm (6.8 in)
1911	104.1 mm (4.1 in)
1912	81.3 mm (3.2 in)
1913	61.0 mm (2.4 in)
1914	53.9 mm (2.1 in)
1915	116.0 mm (4.6 in)
1916	95.8 mm (3.8 in)
1917	124.5 mm (4.9 in)
1918	69.1 mm (2.7 in)
1919	66.1 mm (2.6 in)
1920	80.3 mm (3.2 in)
1921	74.1 mm (2.9 in)
1922	113.1 mm (4.5 in)
1923	117.1 mm (4.6 in)
1924	65.0 mm (2.6 in)
1925	94.4 mm (3.7 in)
1926	80.1 mm (3.2 in)
1927	107.5 mm (4.2 in)
1928	91.9 mm (3.6 in)
1929	93.8 mm (3.7 in)
1930	58.4 mm (2.3 in)
1931	68.7 mm (2.7 in)
1932	87.1 mm (3.4 in)
1933	83.3 mm (3.3 in)
1934	67.6 mm (2.7 in)
1935	109.0 mm (4.3 in)
1936	48.0 mm (1.9 in)
1937	58.9 mm (2.3 in)
1938	123.0 mm (4.8 in)
1939	83.4 mm (3.3 in)
1940	60.6 mm (2.4 in)
1941	153.7 mm (6.1 in)
1942	84.4 mm (3.3 in)
1943	50.4 mm (2.0 in)
1944	68.6 mm (2.7 in)
1945	64.4 mm (2.5 in)
1946	143.0 mm (5.6 in)
1947	75.9 mm (3.0 in)
1948	81.0 mm (3.2 in)
1949	72.9 mm (2.9 in)
1950	71.8 mm (2.8 in)
1951	92.4 mm (3.6 in)
1952	71.8 mm (2.8 in)
1953	94.3 mm (3.7 in)
1954	58.2 mm (2.3 in)
1955	79.8 mm (3.1 in)
1956	105.6 mm (4.2 in)
1957	46.2 mm (1.8 in)
1958	103.4 mm (4.1 in)
1959	43.9 mm (1.7 in)
1960	112.6 mm (4.4 in)
1961	63.1 mm (2.5 in)
1962	95.5 mm (3.8 in)
1963	120.8 mm (4.8 in)
1964	109.7 mm (4.3 in)
1965	41.2 mm (1.6 in)
1966	76.0 mm (3.0 in)
1967	49.6 mm (2.0 in)
1968	74.4 mm (2.9 in)
1969	124.0 mm (4.9 in)
1970	136.1 mm (5.4 in)
1971	141.7 mm (5.6 in)
1972	63.7 mm (2.5 in)
1973	70.1 mm (2.8 in)
1974	99.6 mm (3.9 in)
1975	72.0 mm (2.8 in)
1976	75.9 mm (3.0 in)
1977	51.0 mm (2.0 in)
1978	72.6 mm (2.9 in)
1979	61.2 mm (2.4 in)
1980	55.4 mm (2.2 in)
1981	90.4 mm (3.6 in)
1982	56.2 mm (2.2 in)
1983	61.4 mm (2.4 in)
1984	65.6 mm (2.6 in)
1985	78.4 mm (3.1 in)
1986	95.8 mm (3.8 in)
1987	101.0 mm (4.0 in)
1988	54.6 mm (2.1 in)
1989	65.2 mm (2.6 in)
1990	78.4 mm (3.1 in)
1991	79.8 mm (3.1 in)
1992	130.2 mm (5.1 in)
1993	97.0 mm (3.8 in)
1994	78.6 mm (3.1 in)
1995	82.8 mm (3.3 in)
1996	79.0 mm (3.1 in)
1997	104.6 mm (4.1 in)
1998	67.4 mm (2.7 in)
1999	69.4 mm (2.7 in)
2000	101.9 mm (4.0 in)
2001	67.4 mm (2.7 in)
2002	54.0 mm (2.1 in)
2003	69.2 mm (2.7 in)
2004	75.0 mm (3.0 in)
2005	105.4 mm (4.1 in)
2006	83.6 mm (3.3 in)
2007	111.2 mm (4.4 in)
2008	49.2 mm (1.9 in)
2009	83.0 mm (3.3 in)
2010	71.6 mm (2.8 in)
2011	78.4 mm (3.1 in)
2012	75.4 mm (3.0 in)
2013	100.2 mm (3.9 in)
2014	81.8 mm (3.2 in)
2015	51.6 mm (2.0 in)
2016	114.8 mm (4.5 in)
2017	99.4 mm (3.9 in)
2018	63.0 mm (2.5 in)
2019	69.6 mm (2.7 in)
2020	61.2 mm (2.4 in)
2021	68.3 mm (2.7 in)
2022	90.8 mm (3.6 in)
2023	80.8 mm (3.2 in)
2024	44.6 mm (1.8 in)
2025	82.2 mm (3.2 in)
2026	82.0 mm (3.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mount Barker, 1870 to 2026. The record is 89 days in 1986, marked on the chart; the median year is 28 days.

Longest dry spell (CDD) at Mount Barker by year
Year	Longest dry spell (CDD)
1870	28 days
1878	31 days
1882	28 days
1884	25 days
1885	21 days
1886	22 days
1887	17 days
1888	34 days
1889	19 days
1890	20 days
1891	26 days
1892	25 days
1893	47 days
1894	49 days
1895	35 days
1896	28 days
1897	43 days
1898	39 days
1899	26 days
1900	26 days
1901	29 days
1902	28 days
1903	14 days
1904	52 days
1905	49 days
1906	46 days
1907	36 days
1908	29 days
1909	19 days
1910	25 days
1911	22 days
1912	33 days
1913	28 days
1914	17 days
1915	38 days
1916	29 days
1917	20 days
1918	16 days
1919	24 days
1920	28 days
1921	41 days
1922	40 days
1923	36 days
1924	12 days
1925	21 days
1926	31 days
1927	27 days
1928	47 days
1929	29 days
1930	48 days
1931	19 days
1932	29 days
1933	28 days
1934	37 days
1935	27 days
1936	23 days
1937	19 days
1938	22 days
1939	15 days
1940	20 days
1941	20 days
1942	33 days
1943	19 days
1944	28 days
1945	34 days
1946	18 days
1947	20 days
1948	36 days
1949	30 days
1950	35 days
1951	42 days
1952	34 days
1953	28 days
1954	43 days
1955	35 days
1956	41 days
1957	67 days
1958	26 days
1959	36 days
1960	15 days
1961	37 days
1962	22 days
1963	40 days
1964	22 days
1965	43 days
1966	25 days
1967	35 days
1968	29 days
1969	34 days
1970	49 days
1971	25 days
1972	27 days
1973	21 days
1974	35 days
1975	17 days
1976	35 days
1977	19 days
1978	27 days
1979	23 days
1980	39 days
1981	21 days
1982	21 days
1983	21 days
1984	32 days
1985	34 days
1986	89 days
1987	25 days
1988	31 days
1989	31 days
1990	44 days
1991	62 days
1992	18 days
1993	37 days
1994	32 days
1995	23 days
1996	24 days
1997	21 days
1998	25 days
1999	28 days
2000	27 days
2001	30 days
2002	43 days
2003	28 days
2004	24 days
2005	25 days
2006	37 days
2007	29 days
2008	30 days
2009	38 days
2010	18 days
2011	16 days
2012	24 days
2013	23 days
2014	25 days
2015	35 days
2016	21 days
2017	19 days
2018	20 days
2019	21 days
2020	19 days
2021	18 days
2022	19 days
2023	20 days
2024	47 days
2025	72 days
2026	32 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.

Frost Dates and Growing Season

61 years with a frost

Across 61 years with a frost, the median last spring frost at Mount Barker falls on 1 September and the median first autumn frost on 3 June, which leaves a median of 274 days between them.

In 1989 to 2024 the median growing season was 304 days. That is 56 days more than in 1957 to 1987.

Fitted over all years, the growing season changes by +20.0 days per decade at this station.

Frost dates and growing season at Mount Barker
Measure	Median, all years	Earliest period (1957 to 1987)	Recent period (1989 to 2024)	Recent against earliest	Fitted trend
Last spring frost	1 September	21 September	17 August	35 days earlier	-10.2 days per decade
First autumn frost	3 June	17 May	16 June	30 days later	+9.8 days per decade
Growing days	274 days	248 days	304 days	56 days more	+20.0 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

141 years, 1884 to 2025

A day with at least 41.5 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 117.1 mm (4.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Mount Barker: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	41.5 mm (1.6 in)
5 years	54.9 mm (2.2 in)
10 years	66.0 mm (2.6 in)
25 years	83.2 mm (3.3 in)
50 years	98.8 mm (3.9 in)
100 years	117.1 mm (4.6 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 141 years of values from 1884 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: 129.8 mm (5.1 in) in 1970; 129.3 mm (5.1 in) in 1946; 113.8 mm (4.5 in) in 1969.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Mount Barker, at 1986 and 2016. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1986 ran 0.2 C (0.3 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 2016 ran 0.1 C (0.2 F) higher than in the years before (possible change).

Suspected changes in the annual mean temperature at Mount Barker, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1986	+0.2	+0.3	likely	5
2016	+0.1	+0.2	possible	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2010 to 2024 against 1961 to 1990

Over 2010 to 2024, Mount Barker had a mean temperature of 15.1 C (59.2 F) and 734.3 mm (28.9 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Bega (Newtown Road) (Australia, 1,006 km away), Moorabbin Airport (Australia, 645 km away) and Bridgetown Comparison (Australia, 2,080 km away).

Climate twins of Mount Barker: stations whose 1961 to 1990 climate is closest to its 2010 to 2024 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
Bega (Newtown Road)	Australia	1,006 km (625 mi)	15.1 C (59.2 F)	803.4 mm (31.6 in)	0.53
Moorabbin Airport	Australia	645 km (401 mi)	14.9 C (58.8 F)	717.2 mm (28.2 in)	0.54
Bridgetown Comparison	Australia	2,080 km (1,292 mi)	15.3 C (59.6 F)	782.6 mm (30.8 in)	0.64

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Mount Barker standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mount Barker 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 2026-10-13 (13 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).