Colac (Shire Office) Weather Records (ASN00090147)

Record envelope, standing records and threshold days for Colac (Shire Office) (ASN00090147), Australia, with 129 years of record.

Key Facts for Colac (Shire Office)

Colac (Shire Office) (ASN00090147) is a weather station in Australia at -38.34 latitude and 143.58 longitude, 134 m (440 ft) above sea level.
The station reports from 1898 to 2026, 129 years of record.
1,464 records set at Colac (Shire Office) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Colac (Shire Office) set a daily record precipitation of 30.0 mm (1.2 in) on 28 July 2025.

About the Station

Location: Australia, -38.34 latitude, 143.58 longitude.
Elevation: 134 m (440 ft).
Period of record: 1898 to 2026, 129 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 Colac (Shire 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 Colac (Shire Office), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	42.6 C (108.7 F)	0.6 C (33.1 F)	n/a	n/a
Feb	41.3 C (106.3 F)	1.1 C (34.0 F)	n/a	n/a
Mar	38.6 C (101.5 F)	0.0 C (32.0 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-3.9 C (25.0 F)	n/a	n/a
May	26.4 C (79.5 F)	-3.3 C (26.1 F)	n/a	n/a
Jun	21.7 C (71.1 F)	-4.7 C (23.5 F)	n/a	n/a
Jul	21.2 C (70.2 F)	-5.0 C (23.0 F)	n/a	n/a
Aug	25.2 C (77.4 F)	-3.9 C (25.0 F)	n/a	n/a
Sep	28.3 C (82.9 F)	-3.9 C (25.0 F)	n/a	n/a
Oct	33.6 C (92.5 F)	-3.3 C (26.1 F)	n/a	n/a
Nov	36.9 C (98.4 F)	-2.8 C (27.0 F)	n/a	n/a
Dec	41.8 C (107.2 F)	-0.6 C (30.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Colac (Shire Office) still stand. 1957 holds the most, with 97.

Standing records at Colac (Shire Office) by the year they were set
Year set	Standing records
1957	97
1958	90
1959	68
1960	68
1961	68
1962	66
1963	59
1964	60
1965	74
1966	62
1967	71
1968	37
1969	5
1970	38
1971	37
1972	50
1973	37
1974	46
1975	50
1976	41
1977	42
1978	57
1979	30
1980	66
1981	51
1982	70
1983	24

All-Time Record Progression

5 new records

5 all-time records were set at Colac (Shire Office) between 30 November 1933 and 23 April 1980. Each dot is a new record.

When Colac (Shire Office) set new all-time records
Date	Kind	Detail
1933-11-30	Record daily precipitation	Record daily precipitation 61.0 mm (2.4 in)
1941-01-23	Record daily precipitation	Record daily precipitation 69.1 mm (2.7 in)
1946-02-19	Record daily precipitation	Record daily precipitation 81.3 mm (3.2 in)
1973-02-06	Record daily precipitation	Record daily precipitation 102.9 mm (4.1 in)
1980-04-23	Record daily precipitation	Record daily precipitation 104.6 mm (4.1 in)

Wettest Day of Each Month

Apr: 104.6 mm (4.1 in)

The wettest day on record for each calendar month at Colac (Shire Office). The most was 104.6 mm (4.1 in) on 23 April 1980.

Record daily precipitation for each month at Colac (Shire Office)
Month	Record daily precipitation (mm)	Date
Jan	91.0 mm (3.6 in)	24 January 1991
Feb	102.9 mm (4.1 in)	6 February 1973
Mar	60.5 mm (2.4 in)	2 March 1972
Apr	104.6 mm (4.1 in)	23 April 1980
May	55.1 mm (2.2 in)	31 May 1933
Jun	37.4 mm (1.5 in)	29 June 1980
Jul	37.6 mm (1.5 in)	6 July 2018
Aug	51.1 mm (2.0 in)	20 August 1951
Sep	65.0 mm (2.6 in)	14 September 2016
Oct	49.5 mm (1.9 in)	25 October 1975
Nov	61.0 mm (2.4 in)	30 November 1933
Dec	55.9 mm (2.2 in)	27 December 1907

Period of Record Coverage

1957 to 1983

27 years of record at Colac (Shire Office), 1957 to 1983. 4 years have data for under 90 percent of days and are left out of rankings: 1959, 1968, 1969, 1983.

Days with data per year at Colac (Shire Office)
Year	Days with data	Share of year	Complete
1957	362	99%	Yes
1958	353	97%	Yes
1959	302	83%	No
1960	352	96%	Yes
1961	363	99%	Yes
1962	364	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	361	99%	Yes
1968	213	58%	No
1969	31	8%	No
1970	362	99%	Yes
1971	362	99%	Yes
1972	362	99%	Yes
1973	364	100%	Yes
1974	365	100%	Yes
1975	364	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	364	100%	Yes
1979	365	100%	Yes
1980	365	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	120	33%	No

Latest Records

Latest records at Colac (Shire Office)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 July 2025	Colac (Shire Office), AU	daily rain	30.0 mm (1.2 in)	14.3 mm (0.6 in)	66 years	60 of 100 (Major)
18 October 2024	Colac (Shire Office), AU	daily rain	23.4 mm (0.9 in)	1.6 mm (0.06 in)	87 years	20 of 100 (Routine)
27 February 2023	Colac (Shire Office), AU	daily rain	21.0 mm (0.8 in)	14.1 mm (0.6 in)	79 years	20 of 100 (Routine)
14 October 2022	Colac (Shire Office), AU	daily rain	30.2 mm (1.2 in)	13.7 mm (0.5 in)	73 years	54 of 100 (Notable)
27 September 2022	Colac (Shire Office), AU	daily rain	26.8 mm (1.1 in)	10.2 mm (0.4 in)	40 years	40 of 100 (Notable)
31 January 2022	Colac (Shire Office), AU	daily rain	41.0 mm (1.6 in)	25.6 mm (1.0 in)	0 years	43 of 100 (Notable)
7 January 2022	Colac (Shire Office), AU	daily rain	17.2 mm (0.7 in)	9.6 mm (0.38 in)	119 years	20 of 100 (Routine)
9 June 2021	Colac (Shire Office), AU	daily rain	25.2 mm (1.0 in)	4.4 mm (0.17 in)	80 years	42 of 100 (Notable)
17 May 2021	Colac (Shire Office), AU	daily rain	18.0 mm (0.7 in)	2.2 mm (0.09 in)	19 years	18 of 100 (Routine)
31 January 2021	Colac (Shire Office), AU	daily rain	15.4 mm (0.6 in)	1.0 mm (0.04 in)	18 years	16 of 100 (Routine)
29 January 2021	Colac (Shire Office), AU	daily rain	43.2 mm (1.7 in)	17.3 mm (0.7 in)	58 years	50 of 100 (Notable)
26 October 2020	Colac (Shire Office), AU	daily rain	13.4 mm (0.5 in)	1.0 mm (0.04 in)	26 years	18 of 100 (Routine)
28 September 2020	Colac (Shire Office), AU	daily rain	20.0 mm (0.8 in)	1.5 mm (0.06 in)	109 years	20 of 100 (Routine)
24 August 2020	Colac (Shire Office), AU	daily rain	30.2 mm (1.2 in)	2.3 mm (0.09 in)	96 years	42 of 100 (Notable)
17 August 2020	Colac (Shire Office), AU	daily rain	25.2 mm (1.0 in)	10.0 mm (0.4 in)	19 years	34 of 100 (Routine)
2 May 2019	Colac (Shire Office), AU	daily rain	24.2 mm (1.0 in)	2.4 mm (0.09 in)	92 years	20 of 100 (Routine)
6 July 2018	Colac (Shire Office), AU	monthly rain	37.6 mm (1.5 in)	3.1 mm (0.12 in)	114 years	56 of 100 (Notable)
6 September 2017	Colac (Shire Office), AU	daily rain	35.0 mm (1.4 in)	23.6 mm (0.9 in)	71 years	71 of 100 (Major)
25 April 2017	Colac (Shire Office), AU	daily rain	39.6 mm (1.6 in)	23.3 mm (0.9 in)	88 years	70 of 100 (Major)
29 September 2016	Colac (Shire Office), AU	daily rain	24.0 mm (0.9 in)	4.0 mm (0.16 in)	24 years	20 of 100 (Routine)

Climate Trend

23 complete years, 1957 to 1982

One stripe for each of 23 complete years at Colac (Shire Office), 1957 to 1982. Blue stripes are years cooler than the station's own mean of 13.2 C (55.8 F); red stripes are warmer. The coolest year was 1957, at 12.1 C (53.7 F), and the warmest was 1981, at 14.4 C (57.9 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Colac (Shire Office) as warming stripes, 1957 to 1982
Year	Annual mean temperature	Difference from the station mean
1957	12.1 C	-1.17 C
1958	12.2 C	-0.99 C
1960	12.5 C	-0.72 C
1961	13.6 C	+0.37 C
1962	12.8 C	-0.46 C
1963	12.8 C	-0.44 C
1964	12.2 C	-1.04 C
1965	12.4 C	-0.79 C
1966	12.2 C	-1.01 C
1967	12.5 C	-0.74 C
1970	13.1 C	-0.12 C
1971	13.6 C	+0.33 C
1972	13.3 C	+0.04 C
1973	13.6 C	+0.36 C
1974	13.7 C	+0.45 C
1975	13.7 C	+0.50 C
1976	13.8 C	+0.61 C
1977	13.7 C	+0.43 C
1978	13.7 C	+0.43 C
1979	14.0 C	+0.80 C
1980	14.2 C	+0.93 C
1981	14.4 C	+1.19 C
1982	14.2 C	+0.97 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1898 to 2026

Yearly extremes at Colac (Shire Office): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	42.6 C (108.7 F)	1959	39.3 C (102.7 F)	27
Coldest night (TNn)	-5.0 C (23.0 F)	1960	-1.7 C (28.9 F)	27
Wettest day (Rx1day)	104.6 mm (4.1 in)	1980	34.5 mm (1.4 in)	129
Wettest five days (Rx5day)	135.0 mm (5.3 in)	1980	55.6 mm (2.2 in)	129
Longest dry spell (CDD)	54 days	2009	21 days	129

Hottest day (TXx)

The hottest day of the year at Colac (Shire Office), 1898 to 2026. The record is 42.6 C (108.7 F) in 1959, marked on the chart; the median year is 39.3 C (102.7 F).

Hottest day (TXx) at Colac (Shire Office) by year
Year	Hottest day (TXx)
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	37.2 C (99.0 F)
1958	36.7 C (98.1 F)
1959	42.6 C (108.7 F)
1960	38.3 C (100.9 F)
1961	41.7 C (107.1 F)
1962	37.2 C (99.0 F)
1963	36.1 C (97.0 F)
1964	40.0 C (104.0 F)
1965	38.3 C (100.9 F)
1966	38.3 C (100.9 F)
1967	39.3 C (102.7 F)
1968	40.5 C (104.9 F)
1969	35.3 C (95.5 F)
1970	39.3 C (102.7 F)
1971	36.7 C (98.1 F)
1972	38.5 C (101.3 F)
1973	41.0 C (105.8 F)
1974	35.5 C (95.9 F)
1975	39.3 C (102.7 F)
1976	39.0 C (102.2 F)
1977	40.1 C (104.2 F)
1978	38.6 C (101.5 F)
1979	40.8 C (105.4 F)
1980	41.8 C (107.2 F)
1981	41.2 C (106.2 F)
1982	41.7 C (107.1 F)
1983	41.6 C (106.9 F)
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Colac (Shire Office), 1898 to 2026. The record is -5.0 C (23.0 F) in 1960, marked on the chart; the median year is -1.7 C (28.9 F).

Coldest night (TNn) at Colac (Shire Office) by year
Year	Coldest night (TNn)
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	-2.8 C (27.0 F)
1959	-4.7 C (23.5 F)
1960	-5.0 C (23.0 F)
1961	-2.8 C (27.0 F)
1962	-2.8 C (27.0 F)
1963	-4.4 C (24.1 F)
1964	-2.2 C (28.0 F)
1965	-4.4 C (24.1 F)
1966	-2.8 C (27.0 F)
1967	-3.3 C (26.1 F)
1968	-1.7 C (28.9 F)
1969	4.4 C (39.9 F)
1970	-0.8 C (30.6 F)
1971	-0.8 C (30.6 F)
1972	-1.7 C (28.9 F)
1973	0.0 C (32.0 F)
1974	-1.0 C (30.2 F)
1975	-0.9 C (30.4 F)
1976	-1.7 C (28.9 F)
1977	-0.7 C (30.7 F)
1978	0.1 C (32.2 F)
1979	-1.2 C (29.8 F)
1980	-0.8 C (30.6 F)
1981	0.2 C (32.4 F)
1982	-1.0 C (30.2 F)
1983	2.5 C (36.5 F)
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Colac (Shire Office), 1898 to 2026. The record is 104.6 mm (4.1 in) in 1980, marked on the chart; the median year is 34.5 mm (1.4 in).

Wettest day (Rx1day) at Colac (Shire Office) by year
Year	Wettest day (Rx1day)
1898	41.4 mm (1.6 in)
1899	41.4 mm (1.6 in)
1900	30.7 mm (1.2 in)
1901	32.3 mm (1.3 in)
1902	26.4 mm (1.0 in)
1903	34.5 mm (1.4 in)
1904	46.2 mm (1.8 in)
1905	41.1 mm (1.6 in)
1906	39.9 mm (1.6 in)
1907	55.9 mm (2.2 in)
1908	30.5 mm (1.2 in)
1909	47.2 mm (1.9 in)
1910	47.8 mm (1.9 in)
1911	34.0 mm (1.3 in)
1912	34.0 mm (1.3 in)
1913	40.1 mm (1.6 in)
1914	24.9 mm (1.0 in)
1915	44.7 mm (1.8 in)
1916	47.2 mm (1.9 in)
1917	27.9 mm (1.1 in)
1918	27.2 mm (1.1 in)
1919	26.7 mm (1.1 in)
1920	26.7 mm (1.1 in)
1921	37.6 mm (1.5 in)
1922	35.3 mm (1.4 in)
1923	31.0 mm (1.2 in)
1924	46.5 mm (1.8 in)
1925	38.9 mm (1.5 in)
1926	33.8 mm (1.3 in)
1927	23.4 mm (0.9 in)
1928	42.4 mm (1.7 in)
1929	35.6 mm (1.4 in)
1930	39.1 mm (1.5 in)
1931	41.9 mm (1.6 in)
1932	34.3 mm (1.4 in)
1933	61.0 mm (2.4 in)
1934	35.1 mm (1.4 in)
1935	24.9 mm (1.0 in)
1936	24.1 mm (0.9 in)
1937	34.5 mm (1.4 in)
1938	32.0 mm (1.3 in)
1939	37.6 mm (1.5 in)
1940	25.7 mm (1.0 in)
1941	69.1 mm (2.7 in)
1942	36.6 mm (1.4 in)
1943	19.8 mm (0.8 in)
1944	22.1 mm (0.9 in)
1945	22.4 mm (0.9 in)
1946	81.3 mm (3.2 in)
1947	38.1 mm (1.5 in)
1948	36.3 mm (1.4 in)
1949	32.3 mm (1.3 in)
1950	31.0 mm (1.2 in)
1951	51.1 mm (2.0 in)
1952	34.8 mm (1.4 in)
1953	52.1 mm (2.1 in)
1954	50.0 mm (2.0 in)
1955	25.4 mm (1.0 in)
1956	22.4 mm (0.9 in)
1957	30.2 mm (1.2 in)
1958	32.3 mm (1.3 in)
1959	39.9 mm (1.6 in)
1960	40.1 mm (1.6 in)
1961	31.2 mm (1.2 in)
1962	27.4 mm (1.1 in)
1963	38.9 mm (1.5 in)
1964	55.9 mm (2.2 in)
1965	40.9 mm (1.6 in)
1966	45.7 mm (1.8 in)
1967	19.1 mm (0.8 in)
1968	24.6 mm (1.0 in)
1969	7.4 mm (0.29 in)
1970	24.6 mm (1.0 in)
1971	34.5 mm (1.4 in)
1972	60.5 mm (2.4 in)
1973	102.9 mm (4.1 in)
1974	46.6 mm (1.8 in)
1975	49.5 mm (1.9 in)
1976	23.0 mm (0.9 in)
1977	38.8 mm (1.5 in)
1978	48.4 mm (1.9 in)
1979	28.6 mm (1.1 in)
1980	104.6 mm (4.1 in)
1981	27.6 mm (1.1 in)
1982	25.4 mm (1.0 in)
1983	34.6 mm (1.4 in)
1984	17.0 mm (0.7 in)
1985	48.2 mm (1.9 in)
1986	30.8 mm (1.2 in)
1987	43.8 mm (1.7 in)
1988	26.2 mm (1.0 in)
1989	36.0 mm (1.4 in)
1990	50.4 mm (2.0 in)
1991	91.0 mm (3.6 in)
1992	39.2 mm (1.5 in)
1993	40.0 mm (1.6 in)
1994	25.2 mm (1.0 in)
1995	39.4 mm (1.6 in)
1996	31.0 mm (1.2 in)
1997	25.4 mm (1.0 in)
1998	32.2 mm (1.3 in)
1999	24.8 mm (1.0 in)
2000	30.4 mm (1.2 in)
2001	27.4 mm (1.1 in)
2002	59.6 mm (2.3 in)
2003	19.6 mm (0.8 in)
2004	24.2 mm (1.0 in)
2005	52.0 mm (2.0 in)
2006	22.6 mm (0.9 in)
2007	24.0 mm (0.9 in)
2008	13.6 mm (0.5 in)
2009	16.6 mm (0.7 in)
2010	41.2 mm (1.6 in)
2011	42.0 mm (1.7 in)
2012	13.6 mm (0.5 in)
2013	21.4 mm (0.8 in)
2014	18.4 mm (0.7 in)
2015	38.2 mm (1.5 in)
2016	65.0 mm (2.6 in)
2017	39.6 mm (1.6 in)
2018	37.6 mm (1.5 in)
2019	24.6 mm (1.0 in)
2020	30.2 mm (1.2 in)
2021	43.2 mm (1.7 in)
2022	41.0 mm (1.6 in)
2023	24.2 mm (1.0 in)
2024	23.4 mm (0.9 in)
2025	30.0 mm (1.2 in)
2026	28.0 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Colac (Shire Office), 1898 to 2026. The record is 135.0 mm (5.3 in) in 1980, marked on the chart; the median year is 55.6 mm (2.2 in).

Wettest five days (Rx5day) at Colac (Shire Office) by year
Year	Wettest five days (Rx5day)
1898	63.0 mm (2.5 in)
1899	67.5 mm (2.7 in)
1900	61.6 mm (2.4 in)
1901	75.0 mm (3.0 in)
1902	60.5 mm (2.4 in)
1903	72.0 mm (2.8 in)
1904	55.6 mm (2.2 in)
1905	44.0 mm (1.7 in)
1906	69.3 mm (2.7 in)
1907	92.8 mm (3.7 in)
1908	46.8 mm (1.8 in)
1909	64.8 mm (2.6 in)
1910	98.1 mm (3.9 in)
1911	97.0 mm (3.8 in)
1912	55.8 mm (2.2 in)
1913	49.9 mm (2.0 in)
1914	46.5 mm (1.8 in)
1915	51.6 mm (2.0 in)
1916	94.5 mm (3.7 in)
1917	55.3 mm (2.2 in)
1918	70.6 mm (2.8 in)
1919	53.3 mm (2.1 in)
1920	63.6 mm (2.5 in)
1921	56.3 mm (2.2 in)
1922	48.0 mm (1.9 in)
1923	63.2 mm (2.5 in)
1924	69.4 mm (2.7 in)
1925	52.9 mm (2.1 in)
1926	76.8 mm (3.0 in)
1927	43.2 mm (1.7 in)
1928	88.9 mm (3.5 in)
1929	55.1 mm (2.2 in)
1930	68.6 mm (2.7 in)
1931	71.0 mm (2.8 in)
1932	65.2 mm (2.6 in)
1933	99.1 mm (3.9 in)
1934	66.5 mm (2.6 in)
1935	49.8 mm (2.0 in)
1936	72.4 mm (2.9 in)
1937	54.0 mm (2.1 in)
1938	42.4 mm (1.7 in)
1939	80.2 mm (3.2 in)
1940	32.1 mm (1.3 in)
1941	115.8 mm (4.6 in)
1942	64.5 mm (2.5 in)
1943	49.8 mm (2.0 in)
1944	48.5 mm (1.9 in)
1945	52.7 mm (2.1 in)
1946	124.0 mm (4.9 in)
1947	51.3 mm (2.0 in)
1948	55.7 mm (2.2 in)
1949	74.6 mm (2.9 in)
1950	55.5 mm (2.2 in)
1951	82.3 mm (3.2 in)
1952	56.4 mm (2.2 in)
1953	78.8 mm (3.1 in)
1954	94.0 mm (3.7 in)
1955	59.1 mm (2.3 in)
1956	47.3 mm (1.9 in)
1957	50.8 mm (2.0 in)
1958	76.5 mm (3.0 in)
1959	60.7 mm (2.4 in)
1960	86.5 mm (3.4 in)
1961	53.7 mm (2.1 in)
1962	48.0 mm (1.9 in)
1963	63.8 mm (2.5 in)
1964	73.3 mm (2.9 in)
1965	47.1 mm (1.9 in)
1966	84.4 mm (3.3 in)
1967	39.3 mm (1.5 in)
1968	80.7 mm (3.2 in)
1969	15.5 mm (0.6 in)
1970	57.1 mm (2.2 in)
1971	69.4 mm (2.7 in)
1972	75.1 mm (3.0 in)
1973	106.5 mm (4.2 in)
1974	66.0 mm (2.6 in)
1975	72.7 mm (2.9 in)
1976	50.7 mm (2.0 in)
1977	75.7 mm (3.0 in)
1978	52.4 mm (2.1 in)
1979	55.2 mm (2.2 in)
1980	135.0 mm (5.3 in)
1981	47.6 mm (1.9 in)
1982	31.6 mm (1.2 in)
1983	52.6 mm (2.1 in)
1984	21.2 mm (0.8 in)
1985	51.8 mm (2.0 in)
1986	57.6 mm (2.3 in)
1987	53.6 mm (2.1 in)
1988	32.6 mm (1.3 in)
1989	48.0 mm (1.9 in)
1990	72.4 mm (2.9 in)
1991	91.0 mm (3.6 in)
1992	39.3 mm (1.5 in)
1993	54.4 mm (2.1 in)
1994	36.8 mm (1.4 in)
1995	49.6 mm (2.0 in)
1996	36.5 mm (1.4 in)
1997	53.6 mm (2.1 in)
1998	40.4 mm (1.6 in)
1999	28.2 mm (1.1 in)
2000	38.4 mm (1.5 in)
2001	31.6 mm (1.2 in)
2002	59.6 mm (2.3 in)
2003	32.6 mm (1.3 in)
2004	28.6 mm (1.1 in)
2005	73.2 mm (2.9 in)
2006	27.8 mm (1.1 in)
2007	56.6 mm (2.2 in)
2008	20.2 mm (0.8 in)
2009	20.4 mm (0.8 in)
2010	42.6 mm (1.7 in)
2011	78.0 mm (3.1 in)
2012	24.8 mm (1.0 in)
2013	44.2 mm (1.7 in)
2014	17.2 mm (0.7 in)
2015	9.0 mm (0.35 in)
2016	65.0 mm (2.6 in)
2017	42.3 mm (1.7 in)
2018	37.6 mm (1.5 in)
2019	53.4 mm (2.1 in)
2020	55.8 mm (2.2 in)
2021	77.6 mm (3.1 in)
2022	66.0 mm (2.6 in)
2023	43.8 mm (1.7 in)
2024	42.9 mm (1.7 in)
2025	36.8 mm (1.4 in)
2026	64.5 mm (2.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Colac (Shire Office), 1898 to 2026. The record is 54 days in 2009, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Colac (Shire Office) by year
Year	Longest dry spell (CDD)
1898	19 days
1899	29 days
1900	30 days
1901	28 days
1902	29 days
1903	22 days
1904	22 days
1905	27 days
1906	51 days
1907	15 days
1908	14 days
1909	24 days
1910	26 days
1911	18 days
1912	26 days
1913	26 days
1914	33 days
1915	25 days
1916	34 days
1917	23 days
1918	20 days
1919	18 days
1920	18 days
1921	22 days
1922	20 days
1923	41 days
1924	14 days
1925	15 days
1926	19 days
1927	28 days
1928	26 days
1929	17 days
1930	19 days
1931	20 days
1932	22 days
1933	19 days
1934	19 days
1935	21 days
1936	22 days
1937	19 days
1938	18 days
1939	22 days
1940	19 days
1941	20 days
1942	17 days
1943	31 days
1944	20 days
1945	20 days
1946	13 days
1947	18 days
1948	24 days
1949	14 days
1950	25 days
1951	36 days
1952	21 days
1953	18 days
1954	25 days
1955	27 days
1956	25 days
1957	18 days
1958	25 days
1959	24 days
1960	20 days
1961	28 days
1962	24 days
1963	27 days
1964	18 days
1965	34 days
1966	16 days
1967	25 days
1968	18 days
1969	8 days
1970	28 days
1971	32 days
1972	19 days
1973	14 days
1974	15 days
1975	20 days
1976	24 days
1977	24 days
1978	15 days
1979	16 days
1980	15 days
1981	20 days
1982	21 days
1983	30 days
1984	17 days
1985	12 days
1986	27 days
1987	17 days
1988	19 days
1989	20 days
1990	25 days
1991	43 days
1992	10 days
1993	19 days
1994	27 days
1995	18 days
1996	11 days
1997	26 days
1998	20 days
1999	19 days
2000	40 days
2001	27 days
2002	20 days
2003	24 days
2004	15 days
2005	25 days
2006	21 days
2007	15 days
2008	30 days
2009	54 days
2010	18 days
2011	12 days
2012	15 days
2013	22 days
2014	28 days
2015	16 days
2016	33 days
2017	25 days
2018	41 days
2019	19 days
2020	29 days
2021	20 days
2022	29 days
2023	24 days
2024	30 days
2025	23 days
2026	26 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

86 years, 1899 to 2025

A day with at least 34.5 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 94.2 mm (3.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Colac (Shire 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	34.5 mm (1.4 in)
5 years	46.3 mm (1.8 in)
10 years	55.6 mm (2.2 in)
25 years	69.3 mm (2.7 in)
50 years	81.0 mm (3.2 in)
100 years	94.2 mm (3.7 in)	Longer than the 86 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, 86 years of values from 1899 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: 104.6 mm (4.1 in) in 1980; 102.9 mm (4.1 in) in 1973; 81.3 mm (3.2 in) in 1946.

Download the Data

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