Koombooloomba Dam Weather Records (ASN00031083)

Record envelope, standing records and threshold days for Koombooloomba Dam (ASN00031083), Australia, with 52 years of record.

Key Facts for Koombooloomba Dam

Koombooloomba Dam (ASN00031083) is a weather station in Australia at -17.84 latitude and 145.60 longitude, 760 m (2,493 ft) above sea level.
The station reports from 1960 to 2011, 52 years of record.
1,464 records set at Koombooloomba Dam still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Koombooloomba Dam set a daily record precipitation of 59.0 mm (2.3 in) on 29 December 2011.

About the Station

Location: Australia, -17.84 latitude, 145.60 longitude.
Elevation: 760 m (2,493 ft).
Period of record: 1960 to 2011, 52 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 Koombooloomba Dam. 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 Koombooloomba Dam, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	37.6 C (99.7 F)	14.0 C (57.2 F)	n/a	n/a
Feb	35.0 C (95.0 F)	12.0 C (53.6 F)	n/a	n/a
Mar	34.0 C (93.2 F)	11.2 C (52.2 F)	n/a	n/a
Apr	30.8 C (87.4 F)	7.5 C (45.5 F)	n/a	n/a
May	29.0 C (84.2 F)	3.0 C (37.4 F)	n/a	n/a
Jun	27.0 C (80.6 F)	0.0 C (32.0 F)	n/a	n/a
Jul	28.6 C (83.5 F)	-1.2 C (29.8 F)	n/a	n/a
Aug	29.6 C (85.3 F)	0.5 C (32.9 F)	n/a	n/a
Sep	33.8 C (92.8 F)	2.5 C (36.5 F)	n/a	n/a
Oct	34.1 C (93.4 F)	5.0 C (41.0 F)	n/a	n/a
Nov	39.8 C (103.6 F)	7.1 C (44.8 F)	n/a	n/a
Dec	38.8 C (101.8 F)	11.0 C (51.8 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Koombooloomba Dam still stand. 1973 holds the most, with 108.

Standing records at Koombooloomba Dam by the year they were set
Year set	Standing records
1973	108
1974	76
1975	71
1976	59
1977	70
1978	60
1979	49
1980	46
1981	70
1982	60
1983	72
1984	41
1985	54
1986	51
1987	45
1988	56
1989	47
1990	104
1991	54
1992	79
1993	18
1994	47
1995	57
1996	53
1997	17

Wettest Day of Each Month

Mar: 500.9 mm (19.7 in)

The wettest day on record for each calendar month at Koombooloomba Dam. The most was 500.9 mm (19.7 in) on 14 March 1967.

Record daily precipitation for each month at Koombooloomba Dam
Month	Record daily precipitation (mm)	Date
Jan	285.0 mm (11.2 in)	6 January 1979
Feb	450.0 mm (17.7 in)	28 February 2011
Mar	500.9 mm (19.7 in)	14 March 1967
Apr	155.2 mm (6.1 in)	11 April 1971
May	96.0 mm (3.8 in)	11 May 1990
Jun	174.0 mm (6.9 in)	30 June 2011
Jul	108.0 mm (4.3 in)	30 July 1975
Aug	66.6 mm (2.6 in)	18 August 1995
Sep	97.0 mm (3.8 in)	3 September 2010
Oct	116.0 mm (4.6 in)	31 October 1988
Nov	125.4 mm (4.9 in)	23 November 1989
Dec	138.0 mm (5.4 in)	30 December 1997

Period of Record Coverage

1973 to 1997

25 years of record at Koombooloomba Dam, 1973 to 1997. 1 years have data for under 90 percent of days and are left out of rankings: 1997.

Days with data per year at Koombooloomba Dam
Year	Days with data	Share of year	Complete
1973	363	99%	Yes
1974	362	99%	Yes
1975	365	100%	Yes
1976	365	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	359	98%	Yes
1988	353	96%	Yes
1989	361	99%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	365	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	364	100%	Yes
1996	366	100%	Yes
1997	170	47%	No

Latest Records

Latest records at Koombooloomba Dam
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 December 2011	Koombooloomba Dam, AU	daily rain	59.0 mm (2.3 in)	28.0 mm (1.1 in)	4 years	20 of 100 (Routine)
20 December 2011	Koombooloomba Dam, AU	daily rain	78.0 mm (3.1 in)	41.6 mm (1.6 in)	18 years	31 of 100 (Routine)
6 December 2011	Koombooloomba Dam, AU	daily rain	53.0 mm (2.1 in)	18.0 mm (0.7 in)	8 years	16 of 100 (Routine)
2 December 2011	Koombooloomba Dam, AU	daily rain	45.0 mm (1.8 in)	22.2 mm (0.9 in)	20 years	22 of 100 (Routine)
27 October 2011	Koombooloomba Dam, AU	daily rain	36.4 mm (1.4 in)	16.4 mm (0.6 in)	29 years	24 of 100 (Routine)
5 August 2011	Koombooloomba Dam, AU	daily rain	45.0 mm (1.8 in)	20.9 mm (0.8 in)	44 years	37 of 100 (Notable)
5 July 2011	Koombooloomba Dam, AU	daily rain	60.0 mm (2.4 in)	19.4 mm (0.8 in)	16 years	25 of 100 (Routine)
30 June 2011	Koombooloomba Dam, AU	monthly rain	174.0 mm (6.9 in)	83.0 mm (3.3 in)	21 years	61 of 100 (Major)
27 June 2011	Koombooloomba Dam, AU	daily rain	38.0 mm (1.5 in)	3.6 mm (0.14 in)	17 years	12 of 100 (Routine)
20 May 2011	Koombooloomba Dam, AU	daily rain	71.0 mm (2.8 in)	12.6 mm (0.5 in)	46 years	27 of 100 (Routine)
28 February 2011	Koombooloomba Dam, AU	monthly rain	450.0 mm (17.7 in)	50.0 mm (2.0 in)	34 years	39 of 100 (Notable)
24 February 2011	Koombooloomba Dam, AU	daily rain	186.0 mm (7.3 in)	95.8 mm (3.8 in)	39 years	44 of 100 (Notable)
1 December 2010	Koombooloomba Dam, AU	daily rain	30.0 mm (1.2 in)	12.0 mm (0.5 in)	44 years	24 of 100 (Routine)
30 November 2010	Koombooloomba Dam, AU	daily rain	55.0 mm (2.2 in)	6.4 mm (0.25 in)	8 years	11 of 100 (Routine)
22 October 2010	Koombooloomba Dam, AU	daily rain	51.0 mm (2.0 in)	7.1 mm (0.28 in)	45 years	23 of 100 (Routine)
15 October 2010	Koombooloomba Dam, AU	daily rain	82.0 mm (3.2 in)	33.0 mm (1.3 in)	44 years	42 of 100 (Notable)
7 October 2010	Koombooloomba Dam, AU	daily rain	88.0 mm (3.5 in)	59.4 mm (2.3 in)	24 years	52 of 100 (Notable)
24 September 2010	Koombooloomba Dam, AU	daily rain	60.0 mm (2.4 in)	41.0 mm (1.6 in)	23 years	44 of 100 (Notable)
3 September 2010	Koombooloomba Dam, AU	monthly rain	97.0 mm (3.8 in)	17.0 mm (0.7 in)	26 years	37 of 100 (Notable)
27 August 2010	Koombooloomba Dam, AU	daily rain	14.0 mm (0.6 in)	2.6 mm (0.10 in)	15 years	11 of 100 (Routine)

Climate Trend

24 complete years, 1973 to 1996

One stripe for each of 24 complete years at Koombooloomba Dam, 1973 to 1996. Blue stripes are years cooler than the station's own mean of 20.0 C (68.0 F); red stripes are warmer. The coolest year was 1982, at 19.0 C (66.2 F), and the warmest was 1973, at 21.0 C (69.8 F). The strongest colour marks a difference of 1.0 C (1.8 F).

Annual mean temperature at Koombooloomba Dam as warming stripes, 1973 to 1996
Year	Annual mean temperature	Difference from the station mean
1973	21.0 C	+0.96 C
1974	19.9 C	-0.10 C
1975	20.1 C	+0.09 C
1976	20.0 C	+0.02 C
1977	19.5 C	-0.57 C
1978	19.8 C	-0.21 C
1979	19.9 C	-0.09 C
1980	20.2 C	+0.18 C
1981	20.2 C	+0.14 C
1982	19.0 C	-1.00 C
1983	20.3 C	+0.32 C
1984	19.9 C	-0.16 C
1985	19.8 C	-0.19 C
1986	20.4 C	+0.40 C
1987	20.4 C	+0.37 C
1988	20.2 C	+0.20 C
1989	19.9 C	-0.14 C
1990	20.0 C	-0.05 C
1991	19.9 C	-0.15 C
1992	20.6 C	+0.53 C
1993	19.8 C	-0.25 C
1994	19.5 C	-0.51 C
1995	20.1 C	+0.12 C
1996	20.0 C	+0.00 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

1960 to 2011

Yearly extremes at Koombooloomba Dam: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	39.8 C (103.6 F)	1990	35.0 C (95.0 F)	25
Coldest night (TNn)	-1.2 C (29.8 F)	1984	2.2 C (36.0 F)	25
Wettest day (Rx1day)	500.9 mm (19.7 in)	1967	121.1 mm (4.8 in)	52
Wettest five days (Rx5day)	1,225.1 mm (48.2 in)	1967	284.8 mm (11.2 in)	52
Longest dry spell (CDD)	78 days	1991	28 days	52

Hottest day (TXx)

The hottest day of the year at Koombooloomba Dam, 1960 to 2011. The record is 39.8 C (103.6 F) in 1990, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Koombooloomba Dam by year
Year	Hottest day (TXx)
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	35.0 C (95.0 F)
1974	33.5 C (92.3 F)
1975	33.5 C (92.3 F)
1976	34.0 C (93.2 F)
1977	34.0 C (93.2 F)
1978	35.0 C (95.0 F)
1979	36.0 C (96.8 F)
1980	35.0 C (95.0 F)
1981	34.5 C (94.1 F)
1982	34.0 C (93.2 F)
1983	35.5 C (95.9 F)
1984	33.5 C (92.3 F)
1985	34.0 C (93.2 F)
1986	35.6 C (96.1 F)
1987	36.1 C (97.0 F)
1988	34.0 C (93.2 F)
1989	36.0 C (96.8 F)
1990	39.8 C (103.6 F)
1991	38.8 C (101.8 F)
1992	37.2 C (99.0 F)
1993	34.9 C (94.8 F)
1994	37.6 C (99.7 F)
1995	35.5 C (95.9 F)
1996	33.8 C (92.8 F)
1997	31.2 C (88.2 F)
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

Coldest night (TNn)

The coldest night of the year at Koombooloomba Dam, 1960 to 2011. The record is -1.2 C (29.8 F) in 1984, marked on the chart; the median year is 2.2 C (36.0 F).

Coldest night (TNn) at Koombooloomba Dam by year
Year	Coldest night (TNn)
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	7.0 C (44.6 F)
1974	1.0 C (33.8 F)
1975	1.5 C (34.7 F)
1976	1.5 C (34.7 F)
1977	1.0 C (33.8 F)
1978	0.5 C (32.9 F)
1979	2.5 C (36.5 F)
1980	3.0 C (37.4 F)
1981	4.5 C (40.1 F)
1982	0.0 C (32.0 F)
1983	-0.5 C (31.1 F)
1984	-1.2 C (29.8 F)
1985	0.8 C (33.4 F)
1986	2.5 C (36.5 F)
1987	4.5 C (40.1 F)
1988	3.8 C (38.8 F)
1989	2.2 C (36.0 F)
1990	0.5 C (32.9 F)
1991	3.0 C (37.4 F)
1992	2.8 C (37.0 F)
1993	5.1 C (41.2 F)
1994	2.2 C (36.0 F)
1995	0.5 C (32.9 F)
1996	2.8 C (37.0 F)
1997	2.4 C (36.3 F)
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

Wettest day (Rx1day)

The wettest day of the year at Koombooloomba Dam, 1960 to 2011. The record is 500.9 mm (19.7 in) in 1967, marked on the chart; the median year is 121.1 mm (4.8 in).

Wettest day (Rx1day) at Koombooloomba Dam by year
Year	Wettest day (Rx1day)
1960	42.7 mm (1.7 in)
1961	85.6 mm (3.4 in)
1962	66.3 mm (2.6 in)
1963	135.1 mm (5.3 in)
1964	121.2 mm (4.8 in)
1965	83.8 mm (3.3 in)
1966	106.7 mm (4.2 in)
1967	500.9 mm (19.7 in)
1968	112.3 mm (4.4 in)
1969	198.1 mm (7.8 in)
1970	133.4 mm (5.3 in)
1971	188.5 mm (7.4 in)
1972	177.3 mm (7.0 in)
1973	163.3 mm (6.4 in)
1974	155.0 mm (6.1 in)
1975	191.0 mm (7.5 in)
1976	129.0 mm (5.1 in)
1977	400.0 mm (15.7 in)
1978	59.0 mm (2.3 in)
1979	285.0 mm (11.2 in)
1980	209.0 mm (8.2 in)
1981	154.0 mm (6.1 in)
1982	113.0 mm (4.4 in)
1983	80.0 mm (3.1 in)
1984	110.0 mm (4.3 in)
1985	139.0 mm (5.5 in)
1986	121.0 mm (4.8 in)
1987	80.8 mm (3.2 in)
1988	116.0 mm (4.6 in)
1989	219.2 mm (8.6 in)
1990	178.0 mm (7.0 in)
1991	152.0 mm (6.0 in)
1992	88.0 mm (3.5 in)
1993	92.0 mm (3.6 in)
1994	180.4 mm (7.1 in)
1995	109.4 mm (4.3 in)
1996	315.6 mm (12.4 in)
1997	278.0 mm (10.9 in)
1998	118.0 mm (4.6 in)
1999	176.0 mm (6.9 in)
2000	113.0 mm (4.4 in)
2001	89.0 mm (3.5 in)
2002	44.0 mm (1.7 in)
2003	65.0 mm (2.6 in)
2004	109.0 mm (4.3 in)
2005	63.0 mm (2.5 in)
2006	51.0 mm (2.0 in)
2007	285.0 mm (11.2 in)
2008	99.0 mm (3.9 in)
2009	152.0 mm (6.0 in)
2010	98.0 mm (3.9 in)
2011	450.0 mm (17.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Koombooloomba Dam, 1960 to 2011. The record is 1,225.1 mm (48.2 in) in 1967, marked on the chart; the median year is 284.8 mm (11.2 in).

Wettest five days (Rx5day) at Koombooloomba Dam by year
Year	Wettest five days (Rx5day)
1960	109.5 mm (4.3 in)
1961	178.6 mm (7.0 in)
1962	161.6 mm (6.4 in)
1963	355.5 mm (14.0 in)
1964	329.1 mm (13.0 in)
1965	254.2 mm (10.0 in)
1966	285.0 mm (11.2 in)
1967	1,225.1 mm (48.2 in)
1968	326.0 mm (12.8 in)
1969	315.5 mm (12.4 in)
1970	265.5 mm (10.5 in)
1971	321.6 mm (12.7 in)
1972	532.2 mm (21.0 in)
1973	391.7 mm (15.4 in)
1974	284.6 mm (11.2 in)
1975	335.0 mm (13.2 in)
1976	205.1 mm (8.1 in)
1977	785.8 mm (30.9 in)
1978	183.2 mm (7.2 in)
1979	1,146.2 mm (45.1 in)
1980	496.4 mm (19.5 in)
1981	340.0 mm (13.4 in)
1982	318.9 mm (12.6 in)
1983	205.8 mm (8.1 in)
1984	310.0 mm (12.2 in)
1985	306.3 mm (12.1 in)
1986	255.6 mm (10.1 in)
1987	228.4 mm (9.0 in)
1988	307.8 mm (12.1 in)
1989	422.0 mm (16.6 in)
1990	514.4 mm (20.3 in)
1991	373.0 mm (14.7 in)
1992	223.4 mm (8.8 in)
1993	178.8 mm (7.0 in)
1994	303.6 mm (12.0 in)
1995	315.8 mm (12.4 in)
1996	514.8 mm (20.3 in)
1997	399.8 mm (15.7 in)
1998	127.0 mm (5.0 in)
1999	130.0 mm (5.1 in)
2000	91.9 mm (3.6 in)
2001	48.6 mm (1.9 in)
2002	23.0 mm (0.9 in)
2003	60.4 mm (2.4 in)
2004	164.7 mm (6.5 in)
2005	57.6 mm (2.3 in)
2006	107.0 mm (4.2 in)
2007	156.0 mm (6.1 in)
2008	34.0 mm (1.3 in)
2009	163.0 mm (6.4 in)
2010	114.0 mm (4.5 in)
2011	636.0 mm (25.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Koombooloomba Dam, 1960 to 2011. The record is 78 days in 1991, marked on the chart; the median year is 28 days.

Longest dry spell (CDD) at Koombooloomba Dam by year
Year	Longest dry spell (CDD)
1960	9 days
1961	31 days
1962	30 days
1963	30 days
1964	18 days
1965	21 days
1966	35 days
1967	45 days
1968	32 days
1969	28 days
1970	24 days
1971	33 days
1972	51 days
1973	17 days
1974	27 days
1975	19 days
1976	30 days
1977	19 days
1978	18 days
1979	19 days
1980	37 days
1981	36 days
1982	29 days
1983	22 days
1984	55 days
1985	21 days
1986	28 days
1987	22 days
1988	18 days
1989	18 days
1990	51 days
1991	78 days
1992	19 days
1993	21 days
1994	42 days
1995	22 days
1996	39 days
1997	19 days
1998	10 days
1999	19 days
2000	31 days
2001	32 days
2002	61 days
2003	34 days
2004	13 days
2005	37 days
2006	15 days
2007	26 days
2008	31 days
2009	28 days
2010	13 days
2011	51 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

37 years, 1961 to 1997

A day with at least 136.5 mm (5.4 in) of rain is expected about once in 2 years. A day with at least 555.7 mm (21.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Koombooloomba Dam: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	136.5 mm (5.4 in)
5 years	208.3 mm (8.2 in)
10 years	268.9 mm (10.6 in)
25 years	364.2 mm (14.3 in)
50 years	451.7 mm (17.8 in)	Longer than the 37 years of record
100 years	555.7 mm (21.9 in)	Longer than the 37 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, 37 years of values from 1961 to 1997.

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: 500.9 mm (19.7 in) in 1967; 400.0 mm (15.7 in) in 1977; 315.6 mm (12.4 in) in 1996.

Download the Data

Data for Koombooloomba Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Koombooloomba Dam 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).