Whyalla Aero Weather Records (ASN00018120)

Record envelope, standing records and threshold days for Whyalla Aero (ASN00018120), Australia, with 48 years of record.

Key Facts for Whyalla Aero

Whyalla Aero (ASN00018120) is a weather station in Australia at -33.05 latitude and 137.52 longitude, 7 m (21 ft) above sea level.
The station reports from 1979 to 2026, 48 years of record.
1,464 records set at Whyalla Aero still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Whyalla Aero set a daily record high maximum temperature of 36.9 C (98.4 F) on 29 September 2026 (provisional).

Provisional Records

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

About the Station

Location: Australia, -33.05 latitude, 137.52 longitude.
Elevation: 7 m (21 ft).
Period of record: 1979 to 2026, 48 years.
Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

10 days at or beyond a record

The band shows the record high and record low for each calendar day at Whyalla Aero. The lines show the 2026 daily maximum and minimum. 10 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Whyalla Aero, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	48.5 C (119.3 F)	5.9 C (42.6 F)	47.8 C (118.0 F)	12.3 C (54.1 F)
Feb	48.0 C (118.4 F)	8.6 C (47.5 F)	39.2 C (102.6 F)	10.8 C (51.4 F)
Mar	44.1 C (111.4 F)	5.5 C (41.9 F)	34.9 C (94.8 F)	10.8 C (51.4 F)
Apr	40.4 C (104.7 F)	2.2 C (36.0 F)	34.7 C (94.5 F)	8.5 C (47.3 F)
May	32.9 C (91.2 F)	-0.4 C (31.3 F)	30.7 C (87.3 F)	5.5 C (41.9 F)
Jun	26.3 C (79.3 F)	-3.2 C (26.2 F)	25.9 C (78.6 F)	2.0 C (35.6 F)
Jul	27.0 C (80.6 F)	-3.2 C (26.2 F)	20.4 C (68.7 F)	0.9 C (33.6 F)
Aug	32.4 C (90.3 F)	-2.0 C (28.4 F)	22.2 C (72.0 F)	-0.4 C (31.3 F)
Sep	38.0 C (100.4 F)	-0.7 C (30.7 F)	36.9 C (98.4 F)	3.4 C (38.1 F)
Oct	42.1 C (107.8 F)	0.3 C (32.5 F)	21.7 C (71.1 F)	12.5 C (54.5 F)
Nov	46.1 C (115.0 F)	4.4 C (39.9 F)	n/a	n/a
Dec	46.8 C (116.2 F)	4.7 C (40.5 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Whyalla Aero still stand. 2018 holds the most, with 49.

Standing records at Whyalla Aero by the year they were set
Year set	Standing records
1982	30
1983	19
1984	31
1985	41
1986	40
1987	41
1988	27
1989	36
1990	28
1991	2
1992	39
1993	33
1994	39
1995	45
1996	33
1997	34
1998	34
1999	33
2000	27
2001	33
2002	42
2003	27
2004	44
2005	36
2006	37
2007	39
2008	35
2009	34
2010	37
2011	27
2012	29
2013	33
2014	29
2015	29
2016	21
2017	35
2018	49
2019	44
2020	39
2021	31
2022	21
2023	27
2024	32
2025	23
2026	19

All-Time Record Progression

1 new records

1 all-time records were set at Whyalla Aero between 24 January 2019 and 24 January 2019. Each dot is a new record.

Wettest Day of Each Month

Feb: 101.6 mm (4.0 in)

The wettest day on record for each calendar month at Whyalla Aero. The most was 101.6 mm (4.0 in) on 24 February 1979.

Record daily precipitation for each month at Whyalla Aero
Month	Record daily precipitation (mm)	Date
Jan	62.8 mm (2.5 in)	15 January 1995
Feb	101.6 mm (4.0 in)	24 February 1979
Mar	50.0 mm (2.0 in)	20 March 2007
Apr	44.5 mm (1.8 in)	22 April 1980
May	31.2 mm (1.2 in)	24 May 1979
Jun	40.0 mm (1.6 in)	6 June 2001
Jul	40.0 mm (1.6 in)	1 July 1986
Aug	24.4 mm (1.0 in)	14 August 1986
Sep	52.0 mm (2.0 in)	27 September 1979
Oct	49.0 mm (1.9 in)	31 October 1997
Nov	53.0 mm (2.1 in)	4 November 2015
Dec	51.0 mm (2.0 in)	5 December 1995

Period of Record Coverage

1982 to 2026

45 years of record at Whyalla Aero, 1982 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1982, 1983, 1988, 1991, 1992, 1998, 2026.

Days with data per year at Whyalla Aero
Year	Days with data	Share of year	Complete
1982	209	57%	No
1983	260	71%	No
1984	365	100%	Yes
1985	365	100%	Yes
1986	361	99%	Yes
1987	364	100%	Yes
1988	322	88%	No
1989	364	100%	Yes
1990	363	99%	Yes
1991	8	2%	No
1992	302	83%	No
1993	359	98%	Yes
1994	334	92%	Yes
1995	338	93%	Yes
1996	350	96%	Yes
1997	358	98%	Yes
1998	328	90%	No
1999	352	96%	Yes
2000	355	97%	Yes
2001	333	91%	Yes
2002	365	100%	Yes
2003	353	97%	Yes
2004	365	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	364	100%	Yes
2008	365	100%	Yes
2009	365	100%	Yes
2010	364	100%	Yes
2011	365	100%	Yes
2012	366	100%	Yes
2013	364	100%	Yes
2014	365	100%	Yes
2015	361	99%	Yes
2016	366	100%	Yes
2017	364	100%	Yes
2018	365	100%	Yes
2019	360	99%	Yes
2020	355	97%	Yes
2021	364	100%	Yes
2022	364	100%	Yes
2023	362	99%	Yes
2024	362	99%	Yes
2025	364	100%	Yes
2026	272	75%	No

Latest Records

Latest records at Whyalla Aero
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 September 2026	Whyalla Aero, AU	daily high max (Provisional)	36.9 C (98.4 F)	3.9 C (7.0 F)	12 years	14 of 100 (Routine)
19 September 2026	Whyalla Aero, AU	daily high max (Provisional)	32.1 C (89.8 F)	0.4 C (0.7 F)	7 years	6 of 100 (Routine)
24 August 2026	Whyalla Aero, AU	daily high min (Provisional)	12.1 C (53.8 F)	1.0 C (1.8 F)	20 years	12 of 100 (Routine)
12 August 2026	Whyalla Aero, AU	daily rain	5.8 mm (0.23 in)	0.8 mm (0.03 in)	11 years	9 of 100 (Routine)
10 August 2026	Whyalla Aero, AU	daily rain	9.6 mm (0.38 in)	6.0 mm (0.24 in)	25 years	20 of 100 (Routine)
20 June 2026	Whyalla Aero, AU	daily rain	6.2 mm (0.24 in)	1.7 mm (0.07 in)	1 year	7 of 100 (Routine)
18 June 2026	Whyalla Aero, AU	daily rain	20.0 mm (0.8 in)	4.8 mm (0.19 in)	11 years	17 of 100 (Routine)
17 June 2026	Whyalla Aero, AU	daily high min	15.1 C (59.2 F)	3.5 C (6.3 F)	16 years	17 of 100 (Routine)
16 June 2026	Whyalla Aero, AU	daily high min	12.1 C (53.8 F)	0.2 C (0.4 F)	11 years	7 of 100 (Routine)
13 June 2026	Whyalla Aero, AU	daily high min	14.6 C (58.3 F)	1.4 C (2.5 F)	21 years	13 of 100 (Routine)
12 June 2026	Whyalla Aero, AU	daily high max	25.9 C (78.6 F)	3.1 C (5.6 F)	24 years	23 of 100 (Routine)
2 June 2026	Whyalla Aero, AU	daily high min	14.3 C (57.7 F)	0.8 C (1.4 F)	12 years	9 of 100 (Routine)
16 May 2026	Whyalla Aero, AU	daily rain	11.2 mm (0.4 in)	7.6 mm (0.30 in)	43 years	20 of 100 (Routine)
2 May 2026	Whyalla Aero, AU	monthly high min	19.8 C (67.6 F)	1.5 C (2.7 F)	37 years	29 of 100 (Routine)
30 April 2026	Whyalla Aero, AU	daily high max	30.2 C (86.4 F)	0.8 C (1.4 F)	9 years	7 of 100 (Routine)
6 April 2026	Whyalla Aero, AU	daily high max	34.7 C (94.5 F)	2.6 C (4.7 F)	24 years	16 of 100 (Routine)
26 March 2026	Whyalla Aero, AU	daily rain	2.2 mm (0.09 in)	1.2 mm (0.05 in)	15 years	9 of 100 (Routine)
25 March 2026	Whyalla Aero, AU	daily high min	19.2 C (66.6 F)	0.1 C (0.2 F)	0 years	4 of 100 (Routine)
24 March 2026	Whyalla Aero, AU	daily high min (Tie)	19.1 C (66.4 F)	tie	9 years	1 of 100 (Routine)
17 March 2026	Whyalla Aero, AU	daily rain	34.0 mm (1.3 in)	30.8 mm (1.2 in)	1 year	44 of 100 (Notable)

Climate Trend

39 complete years, 1984 to 2025

One stripe for each of 39 complete years at Whyalla Aero, 1984 to 2025. Blue stripes are years cooler than the station's own mean of 17.7 C (63.9 F); red stripes are warmer. The coolest year was 1984, at 16.8 C (62.3 F), and the warmest was 2013, at 18.6 C (65.4 F). The strongest colour marks a difference of 0.9 C (1.6 F).

Annual mean temperature at Whyalla Aero as warming stripes, 1984 to 2025
Year	Annual mean temperature	Difference from the station mean
1984	16.8 C	-0.88 C
1985	17.1 C	-0.64 C
1986	17.0 C	-0.71 C
1987	17.1 C	-0.65 C
1988	18.0 C	+0.24 C
1989	16.9 C	-0.79 C
1990	17.7 C	-0.05 C
1993	17.8 C	+0.08 C
1994	17.6 C	-0.11 C
1995	17.4 C	-0.28 C
1996	17.3 C	-0.42 C
1997	17.7 C	-0.06 C
1999	17.7 C	-0.01 C
2000	18.0 C	+0.33 C
2001	17.7 C	+0.01 C
2002	17.6 C	-0.09 C
2003	17.6 C	-0.13 C
2004	17.8 C	+0.05 C
2005	18.1 C	+0.35 C
2006	17.5 C	-0.20 C
2007	18.3 C	+0.58 C
2008	17.5 C	-0.17 C
2009	18.3 C	+0.60 C
2010	17.4 C	-0.32 C
2011	17.8 C	+0.09 C
2012	17.7 C	-0.05 C
2013	18.6 C	+0.87 C
2014	18.2 C	+0.50 C
2015	17.9 C	+0.20 C
2016	17.8 C	+0.09 C
2017	18.0 C	+0.24 C
2018	18.2 C	+0.50 C
2019	18.1 C	+0.43 C
2020	17.5 C	-0.17 C
2021	17.5 C	-0.22 C
2022	17.3 C	-0.40 C
2023	17.7 C	-0.04 C
2024	18.3 C	+0.57 C
2025	18.3 C	+0.63 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1984 to 2025. In Fahrenheit: 0.4 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Whyalla Aero
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.3) per decade	0.4 F (0.2 to 0.5) per decade	1984 to 2025	39	Rise
Mean daily maximum	0.2 C (0.1 to 0.3) per decade	0.3 F (0.1 to 0.5) per decade	1984 to 2025	39	Rise
Mean daily minimum	0.2 C (0.1 to 0.3) per decade	0.4 F (0.2 to 0.6) per decade	1984 to 2025	39	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

1979 to 2026

Yearly extremes at Whyalla Aero: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	48.5 C (119.3 F)	2019	44.8 C (112.6 F)	45
Coldest night (TNn)	-3.2 C (26.2 F)	1982	-0.9 C (30.4 F)	45
Wettest day (Rx1day)	101.6 mm (4.0 in)	1979	29.4 mm (1.2 in)	47
Wettest five days (Rx5day)	169.8 mm (6.7 in)	2022	40.0 mm (1.6 in)	47
Longest dry spell (CDD)	93 days	2025	41 days	47

Hottest day (TXx)

The hottest day of the year at Whyalla Aero, 1979 to 2026. The record is 48.5 C (119.3 F) in 2019, marked on the chart; the median year is 44.8 C (112.6 F).

Hottest day (TXx) at Whyalla Aero by year
Year	Hottest day (TXx)
1979	n/a
1980	n/a
1981	n/a
1982	43.6 C (110.5 F)
1983	43.6 C (110.5 F)
1984	42.8 C (109.0 F)
1985	46.5 C (115.7 F)
1986	44.1 C (111.4 F)
1987	42.3 C (108.1 F)
1988	44.1 C (111.4 F)
1989	41.4 C (106.5 F)
1990	46.4 C (115.5 F)
1991	42.5 C (108.5 F)
1992	37.7 C (99.9 F)
1993	46.1 C (115.0 F)
1994	45.7 C (114.3 F)
1995	40.2 C (104.4 F)
1996	46.4 C (115.5 F)
1997	44.6 C (112.3 F)
1998	45.1 C (113.2 F)
1999	44.9 C (112.8 F)
2000	44.6 C (112.3 F)
2001	46.9 C (116.4 F)
2002	43.2 C (109.8 F)
2003	47.1 C (116.8 F)
2004	45.9 C (114.6 F)
2005	45.4 C (113.7 F)
2006	45.7 C (114.3 F)
2007	44.0 C (111.2 F)
2008	43.5 C (110.3 F)
2009	48.0 C (118.4 F)
2010	44.5 C (112.1 F)
2011	44.5 C (112.1 F)
2012	44.9 C (112.8 F)
2013	47.2 C (117.0 F)
2014	45.7 C (114.3 F)
2015	45.8 C (114.4 F)
2016	42.0 C (107.6 F)
2017	43.6 C (110.5 F)
2018	46.8 C (116.2 F)
2019	48.5 C (119.3 F)
2020	45.1 C (113.2 F)
2021	43.7 C (110.7 F)
2022	43.0 C (109.4 F)
2023	44.2 C (111.6 F)
2024	44.9 C (112.8 F)
2025	44.8 C (112.6 F)
2026	47.8 C (118.0 F)

Coldest night (TNn)

The coldest night of the year at Whyalla Aero, 1979 to 2026. The record is -3.2 C (26.2 F) in 1982, marked on the chart; the median year is -0.9 C (30.4 F).

Coldest night (TNn) at Whyalla Aero by year
Year	Coldest night (TNn)
1979	n/a
1980	n/a
1981	n/a
1982	-3.2 C (26.2 F)
1983	-1.5 C (29.3 F)
1984	-3.2 C (26.2 F)
1985	-1.0 C (30.2 F)
1986	0.0 C (32.0 F)
1987	0.2 C (32.4 F)
1988	-0.8 C (30.6 F)
1989	-0.6 C (30.9 F)
1990	0.6 C (33.1 F)
1991	13.0 C (55.4 F)
1992	-0.8 C (30.6 F)
1993	0.6 C (33.1 F)
1994	-1.1 C (30.0 F)
1995	-2.5 C (27.5 F)
1996	0.1 C (32.2 F)
1997	-1.7 C (28.9 F)
1998	-2.1 C (28.2 F)
1999	-1.7 C (28.9 F)
2000	-0.5 C (31.1 F)
2001	0.5 C (32.9 F)
2002	-2.3 C (27.9 F)
2003	-0.4 C (31.3 F)
2004	-0.8 C (30.6 F)
2005	0.2 C (32.4 F)
2006	-2.6 C (27.3 F)
2007	-2.0 C (28.4 F)
2008	-1.8 C (28.8 F)
2009	0.3 C (32.5 F)
2010	-0.8 C (30.6 F)
2011	0.0 C (32.0 F)
2012	-1.4 C (29.5 F)
2013	0.8 C (33.4 F)
2014	-2.0 C (28.4 F)
2015	-2.3 C (27.9 F)
2016	-1.0 C (30.2 F)
2017	-1.4 C (29.5 F)
2018	-0.9 C (30.4 F)
2019	-0.9 C (30.4 F)
2020	-1.4 C (29.5 F)
2021	0.0 C (32.0 F)
2022	-0.9 C (30.4 F)
2023	-0.2 C (31.6 F)
2024	-1.8 C (28.8 F)
2025	0.4 C (32.7 F)
2026	-0.4 C (31.3 F)

Wettest day (Rx1day)

The wettest day of the year at Whyalla Aero, 1979 to 2026. The record is 101.6 mm (4.0 in) in 1979, marked on the chart; the median year is 29.4 mm (1.2 in).

Wettest day (Rx1day) at Whyalla Aero by year
Year	Wettest day (Rx1day)
1979	101.6 mm (4.0 in)
1980	44.5 mm (1.8 in)
1981	21.4 mm (0.8 in)
1982	25.0 mm (1.0 in)
1983	25.0 mm (1.0 in)
1984	14.8 mm (0.6 in)
1985	15.8 mm (0.6 in)
1986	40.0 mm (1.6 in)
1987	22.0 mm (0.9 in)
1988	19.2 mm (0.8 in)
1989	40.0 mm (1.6 in)
1990	19.4 mm (0.8 in)
1991	0.0 mm (0.00 in)
1992	n/a
1993	17.0 mm (0.7 in)
1994	22.4 mm (0.9 in)
1995	62.8 mm (2.5 in)
1996	21.0 mm (0.8 in)
1997	49.3 mm (1.9 in)
1998	41.4 mm (1.6 in)
1999	28.0 mm (1.1 in)
2000	38.0 mm (1.5 in)
2001	40.0 mm (1.6 in)
2002	13.6 mm (0.5 in)
2003	28.0 mm (1.1 in)
2004	16.0 mm (0.6 in)
2005	30.0 mm (1.2 in)
2006	23.0 mm (0.9 in)
2007	55.8 mm (2.2 in)
2008	29.4 mm (1.2 in)
2009	34.0 mm (1.3 in)
2010	50.0 mm (2.0 in)
2011	55.2 mm (2.2 in)
2012	35.0 mm (1.4 in)
2013	24.0 mm (0.9 in)
2014	33.0 mm (1.3 in)
2015	53.0 mm (2.1 in)
2016	23.0 mm (0.9 in)
2017	36.0 mm (1.4 in)
2018	14.2 mm (0.6 in)
2019	28.0 mm (1.1 in)
2020	53.0 mm (2.1 in)
2021	48.3 mm (1.9 in)
2022	55.0 mm (2.2 in)
2023	48.0 mm (1.9 in)
2024	16.0 mm (0.6 in)
2025	15.8 mm (0.6 in)
2026	34.0 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Whyalla Aero, 1979 to 2026. The record is 169.8 mm (6.7 in) in 2022, marked on the chart; the median year is 40.0 mm (1.6 in).

Wettest five days (Rx5day) at Whyalla Aero by year
Year	Wettest five days (Rx5day)
1979	128.6 mm (5.1 in)
1980	57.9 mm (2.3 in)
1981	25.4 mm (1.0 in)
1982	30.2 mm (1.2 in)
1983	36.0 mm (1.4 in)
1984	25.1 mm (1.0 in)
1985	26.4 mm (1.0 in)
1986	52.0 mm (2.0 in)
1987	31.8 mm (1.3 in)
1988	29.0 mm (1.1 in)
1989	71.2 mm (2.8 in)
1990	24.9 mm (1.0 in)
1991	0.0 mm (0.00 in)
1992	n/a
1993	33.5 mm (1.3 in)
1994	22.4 mm (0.9 in)
1995	76.8 mm (3.0 in)
1996	26.2 mm (1.0 in)
1997	50.2 mm (2.0 in)
1998	46.0 mm (1.8 in)
1999	28.2 mm (1.1 in)
2000	38.0 mm (1.5 in)
2001	53.9 mm (2.1 in)
2002	17.7 mm (0.7 in)
2003	64.0 mm (2.5 in)
2004	18.2 mm (0.7 in)
2005	30.0 mm (1.2 in)
2006	23.7 mm (0.9 in)
2007	91.8 mm (3.6 in)
2008	56.2 mm (2.2 in)
2009	61.0 mm (2.4 in)
2010	61.4 mm (2.4 in)
2011	58.0 mm (2.3 in)
2012	44.8 mm (1.8 in)
2013	48.0 mm (1.9 in)
2014	69.4 mm (2.7 in)
2015	84.2 mm (3.3 in)
2016	49.0 mm (1.9 in)
2017	36.0 mm (1.4 in)
2018	22.8 mm (0.9 in)
2019	33.0 mm (1.3 in)
2020	55.2 mm (2.2 in)
2021	65.3 mm (2.6 in)
2022	169.8 mm (6.7 in)
2023	93.4 mm (3.7 in)
2024	20.0 mm (0.8 in)
2025	20.0 mm (0.8 in)
2026	40.0 mm (1.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Whyalla Aero, 1979 to 2026. The record is 93 days in 2025, marked on the chart; the median year is 41 days.

Longest dry spell (CDD) at Whyalla Aero by year
Year	Longest dry spell (CDD)
1979	32 days
1980	52 days
1981	33 days
1982	59 days
1983	35 days
1984	44 days
1985	42 days
1986	47 days
1987	32 days
1988	61 days
1989	67 days
1990	35 days
1991	9 days
1992	n/a
1993	7 days
1994	35 days
1995	23 days
1996	45 days
1997	41 days
1998	33 days
1999	44 days
2000	42 days
2001	25 days
2002	43 days
2003	30 days
2004	45 days
2005	28 days
2006	54 days
2007	33 days
2008	52 days
2009	60 days
2010	37 days
2011	22 days
2012	34 days
2013	31 days
2014	46 days
2015	82 days
2016	38 days
2017	38 days
2018	72 days
2019	58 days
2020	50 days
2021	37 days
2022	39 days
2023	32 days
2024	74 days
2025	93 days
2026	42 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

20 years with a frost

Across 20 years with a frost, the median last spring frost at Whyalla Aero falls on 7 August and the median first autumn frost on 21 June, which leaves a median of 323 days between them.

Frost dates and growing season at Whyalla Aero
Measure	Median, all years	Earliest period	Recent period (1984 to 2023)	Recent against earliest	Fitted trend
Last spring frost	7 August	n/a	7 August	n/a	n/a
First autumn frost	21 June	n/a	21 June	n/a	n/a
Growing days	323 days	n/a	323 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

43 years, 1979 to 2025

A day with at least 31.3 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 92.8 mm (3.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Whyalla Aero: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	31.3 mm (1.2 in)
5 years	46.5 mm (1.8 in)
10 years	57.0 mm (2.2 in)
25 years	71.0 mm (2.8 in)
50 years	81.7 mm (3.2 in)	Longer than the 43 years of record
100 years	92.8 mm (3.7 in)	Longer than the 43 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, 43 years of values from 1979 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: 101.6 mm (4.0 in) in 1979; 62.8 mm (2.5 in) in 1995; 55.8 mm (2.2 in) in 2007.

Download the Data

Data for Whyalla Aero standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Whyalla Aero 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).