Lake St Clair (Hec) Weather Records (ASN00096015)

Record envelope, standing records and threshold days for Lake St Clair (Hec) (ASN00096015), Australia, with 52 years of record.

Key Facts for Lake St Clair (Hec)

Lake St Clair (Hec) (ASN00096015) is a weather station in Australia at -42.10 latitude and 146.22 longitude, 735 m (2,411 ft) above sea level.
The station reports from 1938 to 1989, 52 years of record.
1,464 records set at Lake St Clair (Hec) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Lake St Clair (Hec) set a daily record precipitation of 24.2 mm (1.0 in) on 31 October 1989.

About the Station

Location: Australia, -42.10 latitude, 146.22 longitude.
Elevation: 735 m (2,411 ft).
Period of record: 1938 to 1989, 52 years.
Eligible elements: tmax, tmin, 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 Lake St Clair (Hec). 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 Lake St Clair (Hec), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	33.0 C (91.4 F)	-2.0 C (28.4 F)	n/a	n/a
Feb	35.0 C (95.0 F)	-1.1 C (30.0 F)	n/a	n/a
Mar	30.5 C (86.9 F)	-3.5 C (25.7 F)	n/a	n/a
Apr	24.5 C (76.1 F)	-4.4 C (24.1 F)	n/a	n/a
May	20.5 C (68.9 F)	-5.3 C (22.5 F)	n/a	n/a
Jun	16.5 C (61.7 F)	-11.5 C (11.3 F)	n/a	n/a
Jul	13.5 C (56.3 F)	-10.0 C (14.0 F)	n/a	n/a
Aug	17.0 C (62.6 F)	-8.5 C (16.7 F)	n/a	n/a
Sep	22.2 C (72.0 F)	-6.5 C (20.3 F)	n/a	n/a
Oct	27.3 C (81.1 F)	-4.7 C (23.5 F)	n/a	n/a
Nov	27.8 C (82.0 F)	-4.0 C (24.8 F)	n/a	n/a
Dec	31.7 C (89.1 F)	-2.2 C (28.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Lake St Clair (Hec) still stand. 1980 holds the most, with 68.

Standing records at Lake St Clair (Hec) by the year they were set
Year set	Standing records
1957	61
1958	44
1959	46
1960	36
1961	58
1962	35
1963	57
1964	42
1965	42
1966	52
1967	40
1968	41
1969	53
1970	27
1971	38
1972	56
1973	53
1974	30
1975	56
1976	45
1977	42
1978	52
1979	43
1980	68
1981	43
1982	64
1983	62
1984	39
1985	50
1986	34
1987	33
1988	18
1989	4

Wettest Day of Each Month

Jun: 92.7 mm (3.6 in)

The wettest day on record for each calendar month at Lake St Clair (Hec). The most was 92.7 mm (3.6 in) on 16 June 1947.

Record daily precipitation for each month at Lake St Clair (Hec)
Month	Record daily precipitation (mm)	Date
Jan	47.5 mm (1.9 in)	10 January 1972
Feb	72.6 mm (2.9 in)	19 February 1946
Mar	55.9 mm (2.2 in)	24 March 1964
Apr	87.6 mm (3.4 in)	23 April 1960
May	73.4 mm (2.9 in)	18 May 1975
Jun	92.7 mm (3.6 in)	16 June 1947
Jul	84.0 mm (3.3 in)	26 July 1988
Aug	69.9 mm (2.8 in)	5 August 1947
Sep	54.6 mm (2.1 in)	9 September 1971
Oct	70.6 mm (2.8 in)	13 October 1984
Nov	60.4 mm (2.4 in)	10 November 1982
Dec	61.4 mm (2.4 in)	4 December 1976

Period of Record Coverage

1957 to 1989

33 years of record at Lake St Clair (Hec), 1957 to 1989. 7 years have data for under 90 percent of days and are left out of rankings: 1960, 1968, 1970, 1974, 1987, 1988, 1989.

Days with data per year at Lake St Clair (Hec)
Year	Days with data	Share of year	Complete
1957	351	96%	Yes
1958	355	97%	Yes
1959	359	98%	Yes
1960	323	88%	No
1961	358	98%	Yes
1962	350	96%	Yes
1963	358	98%	Yes
1964	362	99%	Yes
1965	364	100%	Yes
1966	363	99%	Yes
1967	363	99%	Yes
1968	273	75%	No
1969	363	99%	Yes
1970	245	67%	No
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	242	66%	No
1975	334	92%	Yes
1976	341	93%	Yes
1977	364	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	364	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	360	99%	Yes
1987	250	68%	No
1988	154	42%	No
1989	53	15%	No

Latest Records

Latest records at Lake St Clair (Hec)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 October 1989	Lake St Clair (Hec), AU	daily rain	24.2 mm (1.0 in)	0.6 mm (0.02 in)	28 years	13 of 100 (Routine)
31 May 1989	Lake St Clair (Hec), AU	daily rain	21.0 mm (0.8 in)	4.5 mm (0.18 in)	20 years	16 of 100 (Routine)
4 April 1989	Lake St Clair (Hec), AU	daily high max	23.0 C (73.4 F)	0.6 C (1.1 F)	2 years	4 of 100 (Routine)
2 March 1989	Lake St Clair (Hec), AU	daily high min	16.5 C (61.7 F)	3.5 C (6.3 F)	8 years	15 of 100 (Routine)
2 March 1989	Lake St Clair (Hec), AU	daily high max	28.5 C (83.3 F)	0.9 C (1.6 F)	0 years	4 of 100 (Routine)
1 March 1989	Lake St Clair (Hec), AU	monthly high max	30.5 C (86.9 F)	0.5 C (0.9 F)	22 years	20 of 100 (Routine)
5 January 1989	Lake St Clair (Hec), AU	daily rain	34.4 mm (1.4 in)	9.0 mm (0.35 in)	43 years	29 of 100 (Routine)
15 November 1988	Lake St Clair (Hec), AU	daily rain	39.2 mm (1.5 in)	13.0 mm (0.5 in)	20 years	28 of 100 (Routine)
15 November 1988	Lake St Clair (Hec), AU	daily low min (Tie)	0.0 C (32.0 F)	tie	28 years	2 of 100 (Routine)
1 November 1988	Lake St Clair (Hec), AU	daily low min (Tie)	-1.0 C (30.2 F)	tie	10 years	1 of 100 (Routine)
18 October 1988	Lake St Clair (Hec), AU	daily rain	18.6 mm (0.7 in)	0.3 mm (0.01 in)	33 years	14 of 100 (Routine)
6 October 1988	Lake St Clair (Hec), AU	daily rain	29.6 mm (1.2 in)	10.0 mm (0.4 in)	26 years	24 of 100 (Routine)
4 October 1988	Lake St Clair (Hec), AU	daily rain	42.2 mm (1.7 in)	28.5 mm (1.1 in)	46 years	54 of 100 (Notable)
27 September 1988	Lake St Clair (Hec), AU	daily high max	15.5 C (59.9 F)	0.5 C (0.9 F)	22 years	10 of 100 (Routine)
22 September 1988	Lake St Clair (Hec), AU	daily high min (Tie)	5.5 C (41.9 F)	tie	8 years	1 of 100 (Routine)
2 September 1988	Lake St Clair (Hec), AU	daily high min (Tie)	6.0 C (42.8 F)	tie	5 years	1 of 100 (Routine)
1 August 1988	Lake St Clair (Hec), AU	daily rain	23.0 mm (0.9 in)	0.1 mm (0.00 in)	44 years	18 of 100 (Routine)
26 July 1988	Lake St Clair (Hec), AU	monthly rain	84.0 mm (3.3 in)	32.9 mm (1.3 in)	35 years	64 of 100 (Major)
12 July 1988	Lake St Clair (Hec), AU	daily rain	48.0 mm (1.9 in)	26.2 mm (1.0 in)	24 years	43 of 100 (Notable)
23 June 1988	Lake St Clair (Hec), AU	daily high max	10.5 C (50.9 F)	0.5 C (0.9 F)	9 years	6 of 100 (Routine)

Climate Trend

24 complete years, 1957 to 1986

One stripe for each of 24 complete years at Lake St Clair (Hec), 1957 to 1986. Blue stripes are years cooler than the station's own mean of 8.2 C (46.8 F); red stripes are warmer. The coolest year was 1964, at 7.1 C (44.7 F), and the warmest was 1981, at 9.3 C (48.8 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Lake St Clair (Hec) as warming stripes, 1957 to 1986
Year	Annual mean temperature	Difference from the station mean
1957	7.5 C	-0.69 C
1958	7.7 C	-0.55 C
1959	8.5 C	+0.30 C
1961	9.1 C	+0.86 C
1962	8.0 C	-0.22 C
1963	7.7 C	-0.50 C
1964	7.1 C	-1.15 C
1965	7.8 C	-0.48 C
1966	8.0 C	-0.19 C
1967	7.8 C	-0.44 C
1969	8.1 C	-0.17 C
1971	8.5 C	+0.22 C
1972	8.5 C	+0.30 C
1973	7.9 C	-0.31 C
1977	8.2 C	-0.07 C
1978	8.3 C	+0.09 C
1979	8.6 C	+0.33 C
1980	8.9 C	+0.65 C
1981	9.3 C	+1.08 C
1982	8.7 C	+0.44 C
1983	8.6 C	+0.32 C
1984	8.5 C	+0.25 C
1985	8.5 C	+0.30 C
1986	7.9 C	-0.32 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

1938 to 1989

Yearly extremes at Lake St Clair (Hec): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.0 C (95.0 F)	1982	30.0 C (86.0 F)	33
Coldest night (TNn)	-11.5 C (11.3 F)	1983	-5.6 C (21.9 F)	33
Wettest day (Rx1day)	92.7 mm (3.6 in)	1947	47.7 mm (1.9 in)	52
Wettest five days (Rx5day)	222.0 mm (8.7 in)	1947	117.7 mm (4.6 in)	52
Longest dry spell (CDD)	25 days	1954	13 days	52

Hottest day (TXx)

The hottest day of the year at Lake St Clair (Hec), 1938 to 1989. The record is 35.0 C (95.0 F) in 1982, marked on the chart; the median year is 30.0 C (86.0 F).

Hottest day (TXx) at Lake St Clair (Hec) by year
Year	Hottest day (TXx)
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	26.7 C (80.1 F)
1958	25.6 C (78.1 F)
1959	31.1 C (88.0 F)
1960	31.7 C (89.1 F)
1961	32.2 C (90.0 F)
1962	31.1 C (88.0 F)
1963	26.7 C (80.1 F)
1964	27.8 C (82.0 F)
1965	27.8 C (82.0 F)
1966	30.0 C (86.0 F)
1967	29.4 C (84.9 F)
1968	29.4 C (84.9 F)
1969	27.8 C (82.0 F)
1970	24.4 C (75.9 F)
1971	30.6 C (87.1 F)
1972	28.1 C (82.6 F)
1973	31.5 C (88.7 F)
1974	30.5 C (86.9 F)
1975	30.5 C (86.9 F)
1976	30.0 C (86.0 F)
1977	31.0 C (87.8 F)
1978	29.5 C (85.1 F)
1979	29.0 C (84.2 F)
1980	31.0 C (87.8 F)
1981	32.5 C (90.5 F)
1982	35.0 C (95.0 F)
1983	30.0 C (86.0 F)
1984	26.5 C (79.7 F)
1985	27.5 C (81.5 F)
1986	26.5 C (79.7 F)
1987	27.7 C (81.9 F)
1988	31.0 C (87.8 F)
1989	30.5 C (86.9 F)

Coldest night (TNn)

The coldest night of the year at Lake St Clair (Hec), 1938 to 1989. The record is -11.5 C (11.3 F) in 1983, marked on the chart; the median year is -5.6 C (21.9 F).

Coldest night (TNn) at Lake St Clair (Hec) by year
Year	Coldest night (TNn)
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	-6.7 C (19.9 F)
1959	-5.0 C (23.0 F)
1960	-5.6 C (21.9 F)
1961	-5.0 C (23.0 F)
1962	-6.7 C (19.9 F)
1963	-6.7 C (19.9 F)
1964	-7.8 C (18.0 F)
1965	-3.9 C (25.0 F)
1966	-5.6 C (21.9 F)
1967	-4.4 C (24.1 F)
1968	-5.0 C (23.0 F)
1969	-5.8 C (21.6 F)
1970	-3.9 C (25.0 F)
1971	-6.4 C (20.5 F)
1972	-6.7 C (19.9 F)
1973	-7.0 C (19.4 F)
1974	-8.5 C (16.7 F)
1975	-5.5 C (22.1 F)
1976	-6.5 C (20.3 F)
1977	-4.0 C (24.8 F)
1978	-7.5 C (18.5 F)
1979	-5.0 C (23.0 F)
1980	-3.5 C (25.7 F)
1981	-6.5 C (20.3 F)
1982	-6.5 C (20.3 F)
1983	-11.5 C (11.3 F)
1984	-5.5 C (22.1 F)
1985	-5.5 C (22.1 F)
1986	-6.0 C (21.2 F)
1987	-4.6 C (23.7 F)
1988	-4.5 C (23.9 F)
1989	2.0 C (35.6 F)

Wettest day (Rx1day)

The wettest day of the year at Lake St Clair (Hec), 1938 to 1989. The record is 92.7 mm (3.6 in) in 1947, marked on the chart; the median year is 47.7 mm (1.9 in).

Wettest day (Rx1day) at Lake St Clair (Hec) by year
Year	Wettest day (Rx1day)
1938	49.5 mm (1.9 in)
1939	32.3 mm (1.3 in)
1940	38.9 mm (1.5 in)
1941	48.8 mm (1.9 in)
1942	46.7 mm (1.8 in)
1943	41.1 mm (1.6 in)
1944	51.6 mm (2.0 in)
1945	43.9 mm (1.7 in)
1946	72.6 mm (2.9 in)
1947	92.7 mm (3.6 in)
1948	53.3 mm (2.1 in)
1949	35.8 mm (1.4 in)
1950	31.0 mm (1.2 in)
1951	34.5 mm (1.4 in)
1952	62.5 mm (2.5 in)
1953	51.1 mm (2.0 in)
1954	41.1 mm (1.6 in)
1955	32.0 mm (1.3 in)
1956	48.5 mm (1.9 in)
1957	39.9 mm (1.6 in)
1958	47.8 mm (1.9 in)
1959	43.2 mm (1.7 in)
1960	87.6 mm (3.4 in)
1961	39.6 mm (1.6 in)
1962	66.0 mm (2.6 in)
1963	43.2 mm (1.7 in)
1964	69.6 mm (2.7 in)
1965	40.9 mm (1.6 in)
1966	35.8 mm (1.4 in)
1967	32.8 mm (1.3 in)
1968	55.9 mm (2.2 in)
1969	49.0 mm (1.9 in)
1970	55.9 mm (2.2 in)
1971	54.6 mm (2.1 in)
1972	47.5 mm (1.9 in)
1973	43.7 mm (1.7 in)
1974	64.6 mm (2.5 in)
1975	73.4 mm (2.9 in)
1976	61.4 mm (2.4 in)
1977	38.2 mm (1.5 in)
1978	36.4 mm (1.4 in)
1979	53.6 mm (2.1 in)
1980	54.0 mm (2.1 in)
1981	38.8 mm (1.5 in)
1982	60.4 mm (2.4 in)
1983	44.2 mm (1.7 in)
1984	70.6 mm (2.8 in)
1985	43.0 mm (1.7 in)
1986	44.8 mm (1.8 in)
1987	56.2 mm (2.2 in)
1988	84.0 mm (3.3 in)
1989	34.4 mm (1.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Lake St Clair (Hec), 1938 to 1989. The record is 222.0 mm (8.7 in) in 1947, marked on the chart; the median year is 117.7 mm (4.6 in).

Wettest five days (Rx5day) at Lake St Clair (Hec) by year
Year	Wettest five days (Rx5day)
1938	136.2 mm (5.4 in)
1939	88.4 mm (3.5 in)
1940	109.6 mm (4.3 in)
1941	149.8 mm (5.9 in)
1942	106.7 mm (4.2 in)
1943	128.0 mm (5.0 in)
1944	126.3 mm (5.0 in)
1945	118.3 mm (4.7 in)
1946	135.6 mm (5.3 in)
1947	222.0 mm (8.7 in)
1948	156.4 mm (6.2 in)
1949	103.9 mm (4.1 in)
1950	73.5 mm (2.9 in)
1951	84.8 mm (3.3 in)
1952	181.6 mm (7.1 in)
1953	138.3 mm (5.4 in)
1954	84.1 mm (3.3 in)
1955	80.6 mm (3.2 in)
1956	123.4 mm (4.9 in)
1957	78.0 mm (3.1 in)
1958	130.2 mm (5.1 in)
1959	101.0 mm (4.0 in)
1960	166.1 mm (6.5 in)
1961	123.5 mm (4.9 in)
1962	126.5 mm (5.0 in)
1963	130.3 mm (5.1 in)
1964	105.7 mm (4.2 in)
1965	126.0 mm (5.0 in)
1966	69.5 mm (2.7 in)
1967	97.5 mm (3.8 in)
1968	156.3 mm (6.2 in)
1969	135.1 mm (5.3 in)
1970	121.5 mm (4.8 in)
1971	110.5 mm (4.4 in)
1972	101.9 mm (4.0 in)
1973	134.3 mm (5.3 in)
1974	139.2 mm (5.5 in)
1975	201.4 mm (7.9 in)
1976	118.4 mm (4.7 in)
1977	92.6 mm (3.6 in)
1978	105.4 mm (4.1 in)
1979	77.0 mm (3.0 in)
1980	124.4 mm (4.9 in)
1981	112.0 mm (4.4 in)
1982	107.8 mm (4.2 in)
1983	98.4 mm (3.9 in)
1984	121.8 mm (4.8 in)
1985	85.8 mm (3.4 in)
1986	117.0 mm (4.6 in)
1987	117.0 mm (4.6 in)
1988	98.0 mm (3.9 in)
1989	42.6 mm (1.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Lake St Clair (Hec), 1938 to 1989. The record is 25 days in 1954, marked on the chart; the median year is 13 days.

Longest dry spell (CDD) at Lake St Clair (Hec) by year
Year	Longest dry spell (CDD)
1938	10 days
1939	18 days
1940	16 days
1941	11 days
1942	12 days
1943	18 days
1944	9 days
1945	13 days
1946	8 days
1947	10 days
1948	16 days
1949	9 days
1950	24 days
1951	13 days
1952	12 days
1953	10 days
1954	25 days
1955	12 days
1956	24 days
1957	11 days
1958	11 days
1959	17 days
1960	15 days
1961	19 days
1962	11 days
1963	22 days
1964	12 days
1965	15 days
1966	16 days
1967	21 days
1968	16 days
1969	13 days
1970	17 days
1971	16 days
1972	20 days
1973	8 days
1974	11 days
1975	15 days
1976	9 days
1977	12 days
1978	10 days
1979	9 days
1980	10 days
1981	12 days
1982	15 days
1983	11 days
1984	12 days
1985	15 days
1986	12 days
1987	10 days
1988	15 days
1989	16 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

24 years with a frost

Across 24 years with a frost, the median last spring frost at Lake St Clair (Hec) falls on 2 December and the median first autumn frost on 11 March, which leaves a median of 100 days between them.

Frost dates and growing season at Lake St Clair (Hec)
Measure	Median, all years	Earliest period	Recent period (1957 to 1986)	Recent against earliest	Fitted trend
Last spring frost	2 December	n/a	2 December	n/a	n/a
First autumn frost	11 March	n/a	11 March	n/a	n/a
Growing days	100 days	n/a	100 days	n/a	n/a

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

48 years, 1939 to 1986

A day with at least 46.9 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 100.7 mm (4.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Lake St Clair (Hec): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	46.9 mm (1.8 in)
5 years	59.4 mm (2.3 in)
10 years	68.4 mm (2.7 in)
25 years	80.7 mm (3.2 in)
50 years	90.4 mm (3.6 in)	Longer than the 48 years of record
100 years	100.7 mm (4.0 in)	Longer than the 48 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, 48 years of values from 1939 to 1986.

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: 92.7 mm (3.6 in) in 1947; 87.6 mm (3.4 in) in 1960; 73.4 mm (2.9 in) in 1975.

Download the Data

Data for Lake St Clair (Hec) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lake St Clair (Hec) 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 2026-10-14. Last revised 14 October 2026 (2026-10-14).