Hamilton Research Station Weather Records (ASN00090103)

Record envelope, standing records and threshold days for Hamilton Research Station (ASN00090103), Australia, with 39 years of record.

Key Facts for Hamilton Research Station

Hamilton Research Station (ASN00090103) is a weather station in Australia at -37.83 latitude and 142.06 longitude, 200 m (656 ft) above sea level.
The station reports from 1962 to 2000, 39 years of record.
1,464 records set at Hamilton Research Station still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Hamilton Research Station set a daily record low maximum temperature of 9.7 C (49.5 F) on 4 June 2000.

About the Station

Location: Australia, -37.83 latitude, 142.06 longitude.
Elevation: 200 m (656 ft).
Period of record: 1962 to 2000, 39 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 Hamilton Research Station. 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 Hamilton Research Station, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	44.0 C (111.2 F)	1.2 C (34.2 F)	n/a	n/a
Feb	42.7 C (108.9 F)	-0.4 C (31.3 F)	n/a	n/a
Mar	39.6 C (103.3 F)	-1.1 C (30.0 F)	n/a	n/a
Apr	33.3 C (91.9 F)	-2.1 C (28.2 F)	n/a	n/a
May	27.0 C (80.6 F)	-3.4 C (25.9 F)	n/a	n/a
Jun	21.1 C (70.0 F)	-5.4 C (22.3 F)	n/a	n/a
Jul	20.4 C (68.7 F)	-5.4 C (22.3 F)	n/a	n/a
Aug	22.6 C (72.7 F)	-3.5 C (25.7 F)	n/a	n/a
Sep	28.1 C (82.6 F)	-3.6 C (25.5 F)	n/a	n/a
Oct	31.0 C (87.8 F)	-5.7 C (21.7 F)	n/a	n/a
Nov	38.0 C (100.4 F)	-2.4 C (27.7 F)	n/a	n/a
Dec	41.2 C (106.2 F)	0.0 C (32.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Hamilton Research Station still stand. 1982 holds the most, with 71.

Standing records at Hamilton Research Station by the year they were set
Year set	Standing records
1965	49
1966	33
1967	51
1968	41
1969	56
1970	40
1971	23
1972	57
1973	37
1974	42
1975	35
1976	28
1977	45
1978	38
1979	30
1980	47
1981	35
1982	71
1983	39
1984	36
1985	44
1986	25
1987	66
1988	40
1989	36
1990	42
1991	34
1992	25
1993	42
1994	62
1995	40
1996	41
1997	38
1998	49
1999	37
2000	10

Wettest Day of Each Month

Apr: 61.2 mm (2.4 in)

The wettest day on record for each calendar month at Hamilton Research Station. The most was 61.2 mm (2.4 in) on 6 April 1992.

Record daily precipitation for each month at Hamilton Research Station
Month	Record daily precipitation (mm)	Date
Jan	42.0 mm (1.7 in)	24 January 1991
Feb	60.0 mm (2.4 in)	9 February 1976
Mar	50.8 mm (2.0 in)	25 March 1984
Apr	61.2 mm (2.4 in)	6 April 1992
May	53.4 mm (2.1 in)	3 May 1983
Jun	26.0 mm (1.0 in)	5 June 1985
Jul	35.0 mm (1.4 in)	31 July 1975
Aug	27.2 mm (1.1 in)	23 August 1975
Sep	34.6 mm (1.4 in)	28 September 1979
Oct	40.2 mm (1.6 in)	16 October 1976
Nov	38.8 mm (1.5 in)	29 November 1977
Dec	44.7 mm (1.8 in)	15 December 1973

Period of Record Coverage

1965 to 2000

36 years of record at Hamilton Research Station, 1965 to 2000. 4 years have data for under 90 percent of days and are left out of rankings: 1965, 1966, 1967, 2000.

Days with data per year at Hamilton Research Station
Year	Days with data	Share of year	Complete
1965	318	87%	No
1966	306	84%	No
1967	318	87%	No
1968	359	98%	Yes
1969	363	99%	Yes
1970	357	98%	Yes
1971	362	99%	Yes
1972	360	98%	Yes
1973	363	99%	Yes
1974	363	99%	Yes
1975	362	99%	Yes
1976	363	99%	Yes
1977	360	99%	Yes
1978	361	99%	Yes
1979	360	99%	Yes
1980	364	99%	Yes
1981	362	99%	Yes
1982	362	99%	Yes
1983	365	100%	Yes
1984	364	99%	Yes
1985	364	100%	Yes
1986	360	99%	Yes
1987	360	99%	Yes
1988	365	100%	Yes
1989	359	98%	Yes
1990	359	98%	Yes
1991	364	100%	Yes
1992	366	100%	Yes
1993	363	99%	Yes
1994	356	98%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	361	99%	Yes
1998	363	99%	Yes
1999	340	93%	Yes
2000	162	44%	No

Latest Records

Latest records at Hamilton Research Station
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
4 June 2000	Hamilton Research Station, AU	daily low max	9.7 C (49.5 F)	0.3 C (0.5 F)	15 years	8 of 100 (Routine)
28 May 2000	Hamilton Research Station, AU	daily rain	19.7 mm (0.8 in)	7.3 mm (0.29 in)	12 years	19 of 100 (Routine)
27 May 2000	Hamilton Research Station, AU	monthly low max (Tie)	7.1 C (44.8 F)	tie	32 years	5 of 100 (Routine)
18 May 2000	Hamilton Research Station, AU	daily low min	-1.0 C (30.2 F)	0.7 C (1.3 F)	27 years	13 of 100 (Routine)
6 May 2000	Hamilton Research Station, AU	daily rain	20.2 mm (0.8 in)	9.4 mm (0.37 in)	18 years	20 of 100 (Routine)
3 May 2000	Hamilton Research Station, AU	daily low min	0.6 C (33.1 F)	0.1 C (0.2 F)	35 years	13 of 100 (Routine)
28 April 2000	Hamilton Research Station, AU	daily high max	25.8 C (78.4 F)	0.9 C (1.6 F)	3 years	5 of 100 (Routine)
7 April 2000	Hamilton Research Station, AU	daily low min	1.0 C (33.8 F)	2.1 C (3.8 F)	20 years	14 of 100 (Routine)
2 March 2000	Hamilton Research Station, AU	monthly high max	39.6 C (103.3 F)	0.6 C (1.1 F)	21 years	20 of 100 (Routine)
26 February 2000	Hamilton Research Station, AU	daily rain	3.3 mm (0.13 in)	0.1 mm (0.00 in)	22 years	9 of 100 (Routine)
10 February 2000	Hamilton Research Station, AU	daily high max	36.5 C (97.7 F)	3.1 C (5.6 F)	22 years	14 of 100 (Routine)
4 February 2000	Hamilton Research Station, AU	daily high max	37.5 C (99.5 F)	0.4 C (0.7 F)	2 years	3 of 100 (Routine)
21 January 2000	Hamilton Research Station, AU	daily low max	16.7 C (62.1 F)	0.1 C (0.2 F)	5 years	4 of 100 (Routine)
31 December 1999	Hamilton Research Station, AU	daily low max	15.6 C (60.1 F)	0.7 C (1.3 F)	12 years	7 of 100 (Routine)
27 December 1999	Hamilton Research Station, AU	daily rain	14.8 mm (0.6 in)	4.3 mm (0.17 in)	0 years	10 of 100 (Routine)
15 December 1999	Hamilton Research Station, AU	daily high max	35.6 C (96.1 F)	2.2 C (4.0 F)	2 years	6 of 100 (Routine)
8 December 1999	Hamilton Research Station, AU	daily high min	16.0 C (60.8 F)	3.6 C (6.5 F)	33 years	23 of 100 (Routine)
7 December 1999	Hamilton Research Station, AU	daily high max	32.5 C (90.5 F)	3.2 C (5.8 F)	20 years	14 of 100 (Routine)
2 December 1999	Hamilton Research Station, AU	daily high max	35.5 C (95.9 F)	2.5 C (4.5 F)	24 years	14 of 100 (Routine)
30 November 1999	Hamilton Research Station, AU	daily high max	32.0 C (89.6 F)	1.2 C (2.2 F)	5 years	6 of 100 (Routine)

Climate Trend

32 complete years, 1966 to 1999

One stripe for each of 32 complete years at Hamilton Research Station, 1966 to 1999. Blue stripes are years cooler than the station's own mean of 12.8 C (55.0 F); red stripes are warmer. The coolest year was 1995, at 12.4 C (54.2 F), and the warmest was 1988, at 13.8 C (56.8 F). The strongest colour marks a difference of 1.0 C (1.8 F).

Annual mean temperature at Hamilton Research Station as warming stripes, 1966 to 1999
Year	Annual mean temperature	Difference from the station mean
1966	12.4 C	-0.34 C
1968	12.8 C	+0.04 C
1969	12.5 C	-0.32 C
1971	12.7 C	-0.05 C
1972	12.6 C	-0.17 C
1973	12.8 C	+0.07 C
1974	13.0 C	+0.21 C
1975	12.9 C	+0.10 C
1976	12.5 C	-0.28 C
1977	12.5 C	-0.29 C
1978	12.5 C	-0.32 C
1979	12.8 C	+0.00 C
1980	13.1 C	+0.31 C
1981	13.3 C	+0.48 C
1982	13.1 C	+0.33 C
1983	12.8 C	+0.00 C
1984	12.4 C	-0.37 C
1985	12.8 C	+0.06 C
1986	12.4 C	-0.36 C
1987	12.5 C	-0.27 C
1988	13.8 C	+0.98 C
1989	13.1 C	+0.32 C
1990	13.3 C	+0.51 C
1991	12.8 C	+0.07 C
1992	12.6 C	-0.22 C
1993	12.9 C	+0.16 C
1994	12.6 C	-0.21 C
1995	12.4 C	-0.42 C
1996	12.4 C	-0.38 C
1997	13.0 C	+0.27 C
1998	12.6 C	-0.22 C
1999	13.0 C	+0.18 C

The fitted trend in annual mean temperature here over 1966 to 1999 is 0.04 C (-0.09 to 0.16) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.3) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Hamilton Research Station
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.04 C (-0.09 to 0.16) per decade	0.1 F (-0.2 to 0.3) per decade	1966 to 1999	32	Not clearly different from zero
Mean daily maximum	0.04 C (-0.15 to 0.23) per decade	0.1 F (-0.3 to 0.4) per decade	1966 to 1999	32	Not clearly different from zero
Mean daily minimum	0.04 C (-0.12 to 0.21) per decade	0.1 F (-0.2 to 0.4) per decade	1966 to 1999	32	Not clearly different from zero

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

1962 to 2000

Yearly extremes at Hamilton Research Station: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	44.0 C (111.2 F)	1982	39.5 C (103.1 F)	36
Coldest night (TNn)	-5.7 C (21.7 F)	1967	-2.5 C (27.5 F)	36
Wettest day (Rx1day)	61.2 mm (2.4 in)	1992	32.5 mm (1.3 in)	39
Wettest five days (Rx5day)	95.6 mm (3.8 in)	1983	53.0 mm (2.1 in)	39
Longest dry spell (CDD)	49 days	1965	21 days	39

Hottest day (TXx)

The hottest day of the year at Hamilton Research Station, 1962 to 2000. The record is 44.0 C (111.2 F) in 1982, marked on the chart; the median year is 39.5 C (103.1 F).

Hottest day (TXx) at Hamilton Research Station by year
Year	Hottest day (TXx)
1962	n/a
1963	n/a
1964	n/a
1965	39.5 C (103.1 F)
1966	38.6 C (101.5 F)
1967	41.1 C (106.0 F)
1968	42.8 C (109.0 F)
1969	38.0 C (100.4 F)
1970	40.7 C (105.3 F)
1971	37.7 C (99.9 F)
1972	39.1 C (102.4 F)
1973	40.7 C (105.3 F)
1974	35.2 C (95.4 F)
1975	39.4 C (102.9 F)
1976	38.5 C (101.3 F)
1977	39.7 C (103.5 F)
1978	39.0 C (102.2 F)
1979	40.5 C (104.9 F)
1980	41.2 C (106.2 F)
1981	40.8 C (105.4 F)
1982	44.0 C (111.2 F)
1983	42.7 C (108.9 F)
1984	35.4 C (95.7 F)
1985	40.6 C (105.1 F)
1986	38.0 C (100.4 F)
1987	37.9 C (100.2 F)
1988	39.5 C (103.1 F)
1989	38.2 C (100.8 F)
1990	37.0 C (98.6 F)
1991	40.2 C (104.4 F)
1992	38.3 C (100.9 F)
1993	38.9 C (102.0 F)
1994	38.4 C (101.1 F)
1995	39.6 C (103.3 F)
1996	40.5 C (104.9 F)
1997	41.6 C (106.9 F)
1998	41.5 C (106.7 F)
1999	38.8 C (101.8 F)
2000	39.6 C (103.3 F)

Coldest night (TNn)

The coldest night of the year at Hamilton Research Station, 1962 to 2000. The record is -5.7 C (21.7 F) in 1967, marked on the chart; the median year is -2.5 C (27.5 F).

Coldest night (TNn) at Hamilton Research Station by year
Year	Coldest night (TNn)
1962	n/a
1963	n/a
1964	n/a
1965	-3.8 C (25.2 F)
1966	-3.2 C (26.2 F)
1967	-5.7 C (21.7 F)
1968	-2.2 C (28.0 F)
1969	-4.4 C (24.1 F)
1970	-1.8 C (28.8 F)
1971	-2.4 C (27.7 F)
1972	-4.8 C (23.4 F)
1973	-3.4 C (25.9 F)
1974	-5.4 C (22.3 F)
1975	-4.4 C (24.1 F)
1976	-4.8 C (23.4 F)
1977	-2.0 C (28.4 F)
1978	-2.0 C (28.4 F)
1979	-3.1 C (26.4 F)
1980	-2.6 C (27.3 F)
1981	-1.8 C (28.8 F)
1982	-4.5 C (23.9 F)
1983	-0.9 C (30.4 F)
1984	-2.1 C (28.2 F)
1985	-3.0 C (26.6 F)
1986	-0.2 C (31.6 F)
1987	-1.7 C (28.9 F)
1988	-0.1 C (31.8 F)
1989	-1.8 C (28.8 F)
1990	-1.0 C (30.2 F)
1991	0.0 C (32.0 F)
1992	-1.3 C (29.7 F)
1993	-2.0 C (28.4 F)
1994	-3.0 C (26.6 F)
1995	-3.6 C (25.5 F)
1996	-3.8 C (25.2 F)
1997	-3.5 C (25.7 F)
1998	-3.1 C (26.4 F)
1999	-1.6 C (29.1 F)
2000	-1.2 C (29.8 F)

Wettest day (Rx1day)

The wettest day of the year at Hamilton Research Station, 1962 to 2000. The record is 61.2 mm (2.4 in) in 1992, marked on the chart; the median year is 32.5 mm (1.3 in).

Wettest day (Rx1day) at Hamilton Research Station by year
Year	Wettest day (Rx1day)
1962	16.3 mm (0.6 in)
1963	38.1 mm (1.5 in)
1964	24.4 mm (1.0 in)
1965	19.6 mm (0.8 in)
1966	26.9 mm (1.1 in)
1967	17.5 mm (0.7 in)
1968	41.9 mm (1.6 in)
1969	27.7 mm (1.1 in)
1970	34.8 mm (1.4 in)
1971	43.4 mm (1.7 in)
1972	32.5 mm (1.3 in)
1973	44.7 mm (1.8 in)
1974	39.2 mm (1.5 in)
1975	35.0 mm (1.4 in)
1976	60.0 mm (2.4 in)
1977	38.8 mm (1.5 in)
1978	30.8 mm (1.2 in)
1979	34.6 mm (1.4 in)
1980	30.5 mm (1.2 in)
1981	28.6 mm (1.1 in)
1982	20.8 mm (0.8 in)
1983	53.4 mm (2.1 in)
1984	50.8 mm (2.0 in)
1985	37.8 mm (1.5 in)
1986	24.4 mm (1.0 in)
1987	44.2 mm (1.7 in)
1988	22.6 mm (0.9 in)
1989	26.0 mm (1.0 in)
1990	43.8 mm (1.7 in)
1991	42.0 mm (1.7 in)
1992	61.2 mm (2.4 in)
1993	30.0 mm (1.2 in)
1994	23.4 mm (0.9 in)
1995	20.0 mm (0.8 in)
1996	19.8 mm (0.8 in)
1997	37.4 mm (1.5 in)
1998	33.8 mm (1.3 in)
1999	20.8 mm (0.8 in)
2000	20.2 mm (0.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Hamilton Research Station, 1962 to 2000. The record is 95.6 mm (3.8 in) in 1983, marked on the chart; the median year is 53.0 mm (2.1 in).

Wettest five days (Rx5day) at Hamilton Research Station by year
Year	Wettest five days (Rx5day)
1962	28.5 mm (1.1 in)
1963	74.1 mm (2.9 in)
1964	58.2 mm (2.3 in)
1965	39.1 mm (1.5 in)
1966	59.4 mm (2.3 in)
1967	35.0 mm (1.4 in)
1968	75.7 mm (3.0 in)
1969	36.4 mm (1.4 in)
1970	64.0 mm (2.5 in)
1971	75.9 mm (3.0 in)
1972	51.2 mm (2.0 in)
1973	48.1 mm (1.9 in)
1974	59.2 mm (2.3 in)
1975	48.6 mm (1.9 in)
1976	60.7 mm (2.4 in)
1977	53.0 mm (2.1 in)
1978	71.4 mm (2.8 in)
1979	52.4 mm (2.1 in)
1980	43.9 mm (1.7 in)
1981	61.7 mm (2.4 in)
1982	29.6 mm (1.2 in)
1983	95.6 mm (3.8 in)
1984	73.6 mm (2.9 in)
1985	61.2 mm (2.4 in)
1986	43.2 mm (1.7 in)
1987	68.4 mm (2.7 in)
1988	37.2 mm (1.5 in)
1989	54.2 mm (2.1 in)
1990	65.6 mm (2.6 in)
1991	61.0 mm (2.4 in)
1992	72.2 mm (2.8 in)
1993	46.4 mm (1.8 in)
1994	41.0 mm (1.6 in)
1995	44.8 mm (1.8 in)
1996	49.0 mm (1.9 in)
1997	63.0 mm (2.5 in)
1998	44.0 mm (1.7 in)
1999	29.3 mm (1.2 in)
2000	29.5 mm (1.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Hamilton Research Station, 1962 to 2000. The record is 49 days in 1965, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Hamilton Research Station by year
Year	Longest dry spell (CDD)
1962	14 days
1963	21 days
1964	20 days
1965	49 days
1966	16 days
1967	32 days
1968	29 days
1969	30 days
1970	33 days
1971	32 days
1972	25 days
1973	21 days
1974	29 days
1975	18 days
1976	18 days
1977	19 days
1978	15 days
1979	13 days
1980	22 days
1981	18 days
1982	20 days
1983	33 days
1984	19 days
1985	19 days
1986	32 days
1987	29 days
1988	22 days
1989	23 days
1990	17 days
1991	34 days
1992	22 days
1993	25 days
1994	33 days
1995	19 days
1996	33 days
1997	16 days
1998	16 days
1999	21 days
2000	18 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

30 years with a frost

Across 30 years with a frost, the median last spring frost at Hamilton Research Station falls on 19 October and the median first autumn frost on 19 May, which leaves a median of 225 days between them.

Fitted over all years, the growing season changes by -5.9 days per decade at this station.

Frost dates and growing season at Hamilton Research Station
Measure	Median, all years	Earliest period	Recent period (1966 to 1999)	Recent against earliest	Fitted trend
Last spring frost	19 October	n/a	19 October	n/a	+6.8 days per decade
First autumn frost	19 May	n/a	19 May	n/a	+0.9 days per decade
Growing days	225 days	n/a	225 days	n/a	-5.9 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

36 years, 1963 to 1998

A day with at least 33.1 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 67.3 mm (2.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Hamilton Research Station: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	33.1 mm (1.3 in)
5 years	43.4 mm (1.7 in)
10 years	49.8 mm (2.0 in)
25 years	57.2 mm (2.3 in)
50 years	62.4 mm (2.5 in)	Longer than the 36 years of record
100 years	67.3 mm (2.6 in)	Longer than the 36 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, 36 years of values from 1963 to 1998.

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: 61.2 mm (2.4 in) in 1992; 60.0 mm (2.4 in) in 1976; 53.4 mm (2.1 in) in 1983.

Download the Data

Data for Hamilton Research Station standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hamilton Research Station 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).