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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

Koah Weather Records (ASN00031035)

Record envelope, standing records and threshold days for Koah (ASN00031035), Australia, with 63 years of record.

Key Facts for Koah

  • Koah (ASN00031035) is a weather station in Australia at -16.84 latitude and 145.52 longitude, 366 m (1,201 ft) above sea level.
  • The station reports from 1936 to 1998, 63 years of record.
  • 0 records set at Koah still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Koah set a daily record precipitation of 75.0 mm (3.0 in) on 29 December 1997.

About the Station

  • Location: Australia, -16.84 latitude, 145.52 longitude.
  • Elevation: 366 m (1,201 ft).
  • Period of record: 1936 to 1998, 63 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Koah, with 2026 drawn through them The band shows the record high and record low for each calendar day at Koah. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Koah. 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 Koah, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
Febn/an/an/an/a
Marn/an/an/an/a
Aprn/an/an/an/a
Mayn/an/an/an/a
Junn/an/an/an/a
Juln/an/an/an/a
Augn/an/an/an/a
Sepn/an/an/an/a
Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Koah by the year they were set 0 records at Koah still stand. 00000000000
0 records at Koah still stand.
Standing records at Koah by the year they were set
Year setStanding records

All-Time Record Progression

1 new records
When Koah set new all-time records 1 all-time records were set at Koah between 12 March 1967 and 12 March 1967. Each dot is a new record. Record daily precipitation12 March 1967: Record daily precipitation 275.3 mm (10.8 in)
1 all-time records were set at Koah between 12 March 1967 and 12 March 1967. Each dot is a new record.
When Koah set new all-time records
DateKindDetail
1967-03-12Record daily precipitationRecord daily precipitation 275.3 mm (10.8 in)

Wettest Day of Each Month

Mar: 275.3 mm (10.8 in)
Record daily precipitation for each month at Koah The wettest day on record for each calendar month at Koah. The most was 275.3 mm (10.8 in) on 12 March 1967. 0100200300 Jan: 274.8 mm (10.8 in), 4 January 1979 Jan Feb: 253.8 mm (10.0 in), 11 February 1974 Feb Mar: 275.3 mm (10.8 in), 12 March 1967 Mar Apr: 100.3 mm (3.9 in), 9 April 1950 Apr May: 57.9 mm (2.3 in), 18 May 1964 May Jun: 78.7 mm (3.1 in), 17 June 1939 Jun Jul: 37.1 mm (1.5 in), 7 July 1944 Jul Aug: 78.0 mm (3.1 in), 6 August 1947 Aug Sep: 38.6 mm (1.5 in), 9 September 1975 Sep Oct: 58.0 mm (2.3 in), 10 October 1996 Oct Nov: 103.6 mm (4.1 in), 1 November 1957 Nov Dec: 109.8 mm (4.3 in), 31 December 1974 Dec
The wettest day on record for each calendar month at Koah. The most was 275.3 mm (10.8 in) on 12 March 1967.
Record daily precipitation for each month at Koah
MonthRecord daily precipitation (mm)Date
Jan274.8 mm (10.8 in)4 January 1979
Feb253.8 mm (10.0 in)11 February 1974
Mar275.3 mm (10.8 in)12 March 1967
Apr100.3 mm (3.9 in)9 April 1950
May57.9 mm (2.3 in)18 May 1964
Jun78.7 mm (3.1 in)17 June 1939
Jul37.1 mm (1.5 in)7 July 1944
Aug78.0 mm (3.1 in)6 August 1947
Sep38.6 mm (1.5 in)9 September 1975
Oct58.0 mm (2.3 in)10 October 1996
Nov103.6 mm (4.1 in)1 November 1957
Dec109.8 mm (4.3 in)31 December 1974

Latest Records

20
Latest records at Koah
DateStationRecordValueBeat old record byOld record stoodSignificance
29 December 1997Koah, AUdaily rain75.0 mm (3.0 in)32.3 mm (1.3 in)60 years45 of 100 (Notable)
28 December 1997Koah, AUdaily rain70.0 mm (2.8 in)17.8 mm (0.7 in)22 years23 of 100 (Routine)
3 October 1997Koah, AUdaily rain2.2 mm (0.09 in)0.4 mm (0.02 in)12 years9 of 100 (Routine)
2 September 1997Koah, AUdaily rain22.6 mm (0.9 in)12.9 mm (0.5 in)28 years20 of 100 (Routine)
31 August 1997Koah, AUdaily rain10.2 mm (0.4 in)5.6 mm (0.22 in)56 years20 of 100 (Routine)
3 August 1997Koah, AUdaily rain13.8 mm (0.5 in)2.0 mm (0.08 in)15 years12 of 100 (Routine)
24 July 1997Koah, AUdaily rain3.3 mm (0.13 in)2.3 mm (0.09 in)44 years20 of 100 (Routine)
23 March 1997Koah, AUdaily rain189.4 mm (7.5 in)15.2 mm (0.6 in)7 years13 of 100 (Routine)
16 October 1996Koah, AUdaily rain13.4 mm (0.5 in)5.8 mm (0.23 in)42 years20 of 100 (Routine)
10 October 1996Koah, AUmonthly rain58.0 mm (2.3 in)23.2 mm (0.9 in)31 years63 of 100 (Major)
9 October 1996Koah, AUdaily rain23.0 mm (0.9 in)19.6 mm (0.8 in)12 years20 of 100 (Routine)
8 July 1996Koah, AUdaily rain24.0 mm (0.9 in)1.6 mm (0.06 in)52 years20 of 100 (Routine)
3 June 1996Koah, AUdaily rain13.8 mm (0.5 in)7.0 mm (0.28 in)21 years20 of 100 (Routine)
4 October 1995Koah, AUdaily rain32.0 mm (1.3 in)23.9 mm (0.9 in)40 years58 of 100 (Notable)
18 August 1995Koah, AUdaily rain12.0 mm (0.5 in)5.4 mm (0.21 in)14 years17 of 100 (Routine)
13 August 1995Koah, AUdaily rain6.6 mm (0.26 in)1.8 mm (0.07 in)36 years19 of 100 (Routine)
7 August 1995Koah, AUdaily rain28.0 mm (1.1 in)6.7 mm (0.26 in)48 years29 of 100 (Routine)
4 August 1995Koah, AUdaily rain3.4 mm (0.13 in)0.6 mm (0.02 in)50 years20 of 100 (Routine)
14 March 1995Koah, AUdaily rain100.4 mm (4.0 in)24.7 mm (1.0 in)28 years22 of 100 (Routine)
12 August 1994Koah, AUdaily rain14.0 mm (0.6 in)11.7 mm (0.5 in)56 years20 of 100 (Routine)

Extremes by Year

1936 to 1998
Yearly extremes at Koah: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)275.3 mm (10.8 in)1967108.0 mm (4.3 in)63
Wettest five days (Rx5day)1,012.2 mm (39.9 in)1979227.1 mm (8.9 in)63
Longest dry spell (CDD)127 days199146 days63

Wettest day (Rx1day)

Wettest day (Rx1day) at Koah by year The wettest day of the year at Koah, 1936 to 1998. The record is 275.3 mm (10.8 in) in 1967, marked on the chart; the median year is 108.0 mm (4.3 in). 0100200300194019601980Record: 275.3 mm (10.8 in) in 1967
The wettest day of the year at Koah, 1936 to 1998. The record is 275.3 mm (10.8 in) in 1967, marked on the chart; the median year is 108.0 mm (4.3 in).
Wettest day (Rx1day) at Koah by year
YearWettest day (Rx1day)
193647.8 mm (1.9 in)
193755.9 mm (2.2 in)
1938175.0 mm (6.9 in)
1939141.0 mm (5.6 in)
1940147.3 mm (5.8 in)
1941115.6 mm (4.6 in)
194233.0 mm (1.3 in)
194343.2 mm (1.7 in)
1944120.1 mm (4.7 in)
1945154.2 mm (6.1 in)
1946114.8 mm (4.5 in)
194778.0 mm (3.1 in)
1948108.0 mm (4.3 in)
1949247.7 mm (9.8 in)
1950100.3 mm (3.9 in)
195149.5 mm (1.9 in)
195264.5 mm (2.5 in)
195397.3 mm (3.8 in)
195470.6 mm (2.8 in)
1955103.6 mm (4.1 in)
195673.4 mm (2.9 in)
1957103.6 mm (4.1 in)
1958117.9 mm (4.6 in)
1959109.7 mm (4.3 in)
1960109.7 mm (4.3 in)
196190.7 mm (3.6 in)
1962111.5 mm (4.4 in)
196377.5 mm (3.1 in)
1964156.2 mm (6.1 in)
196562.5 mm (2.5 in)
196637.1 mm (1.5 in)
1967275.3 mm (10.8 in)
1968119.6 mm (4.7 in)
1969106.9 mm (4.2 in)
197088.9 mm (3.5 in)
1971107.2 mm (4.2 in)
1972125.2 mm (4.9 in)
1973172.7 mm (6.8 in)
1974253.8 mm (10.0 in)
1975100.4 mm (4.0 in)
1976249.4 mm (9.8 in)
1977206.2 mm (8.1 in)
1978124.8 mm (4.9 in)
1979274.8 mm (10.8 in)
198086.0 mm (3.4 in)
1981128.2 mm (5.0 in)
198274.0 mm (2.9 in)
1983226.8 mm (8.9 in)
198471.6 mm (2.8 in)
1985249.0 mm (9.8 in)
198666.4 mm (2.6 in)
1987156.0 mm (6.1 in)
198891.8 mm (3.6 in)
1989126.6 mm (5.0 in)
1990174.2 mm (6.9 in)
199194.6 mm (3.7 in)
199260.1 mm (2.4 in)
199376.2 mm (3.0 in)
1994230.0 mm (9.1 in)
1995104.0 mm (4.1 in)
1996145.0 mm (5.7 in)
1997189.4 mm (7.5 in)
199850.0 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Koah by year The wettest five days of the year at Koah, 1936 to 1998. The record is 1,012.2 mm (39.9 in) in 1979, marked on the chart; the median year is 227.1 mm (8.9 in). 02505007501,0001,250194019601980Record: 1,012.2 mm (39.9 in) in 1979
The wettest five days of the year at Koah, 1936 to 1998. The record is 1,012.2 mm (39.9 in) in 1979, marked on the chart; the median year is 227.1 mm (8.9 in).
Wettest five days (Rx5day) at Koah by year
YearWettest five days (Rx5day)
193677.3 mm (3.0 in)
1937150.1 mm (5.9 in)
1938282.9 mm (11.1 in)
1939448.2 mm (17.6 in)
1940310.9 mm (12.2 in)
1941247.2 mm (9.7 in)
194266.8 mm (2.6 in)
194362.0 mm (2.4 in)
1944287.0 mm (11.3 in)
1945315.8 mm (12.4 in)
1946161.3 mm (6.4 in)
1947205.9 mm (8.1 in)
1948212.8 mm (8.4 in)
1949588.5 mm (23.2 in)
1950267.4 mm (10.5 in)
1951113.0 mm (4.4 in)
1952175.5 mm (6.9 in)
1953221.0 mm (8.7 in)
195496.0 mm (3.8 in)
1955258.3 mm (10.2 in)
1956243.0 mm (9.6 in)
1957224.3 mm (8.8 in)
1958251.9 mm (9.9 in)
1959272.6 mm (10.7 in)
1960370.8 mm (14.6 in)
1961162.3 mm (6.4 in)
1962193.5 mm (7.6 in)
1963153.2 mm (6.0 in)
1964289.3 mm (11.4 in)
196591.9 mm (3.6 in)
196661.2 mm (2.4 in)
1967551.9 mm (21.7 in)
1968263.1 mm (10.4 in)
1969234.6 mm (9.2 in)
1970176.5 mm (6.9 in)
1971214.3 mm (8.4 in)
1972269.5 mm (10.6 in)
1973227.1 mm (8.9 in)
1974396.2 mm (15.6 in)
1975192.0 mm (7.6 in)
1976276.8 mm (10.9 in)
1977548.4 mm (21.6 in)
1978141.6 mm (5.6 in)
19791,012.2 mm (39.9 in)
1980164.2 mm (6.5 in)
1981454.9 mm (17.9 in)
1982111.4 mm (4.4 in)
1983442.8 mm (17.4 in)
1984121.6 mm (4.8 in)
1985343.4 mm (13.5 in)
1986180.0 mm (7.1 in)
1987248.0 mm (9.8 in)
1988151.2 mm (6.0 in)
1989235.2 mm (9.3 in)
1990405.4 mm (16.0 in)
1991223.2 mm (8.8 in)
199287.4 mm (3.4 in)
1993106.2 mm (4.2 in)
1994337.6 mm (13.3 in)
1995342.6 mm (13.5 in)
1996308.6 mm (12.1 in)
1997213.0 mm (8.4 in)
1998185.0 mm (7.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Koah by year The longest dry spell of the year at Koah, 1936 to 1998. The record is 127 days in 1991, marked on the chart; the median year is 46 days. 255075100125150194019601980Record: 127 days in 1991
The longest dry spell of the year at Koah, 1936 to 1998. The record is 127 days in 1991, marked on the chart; the median year is 46 days.
Longest dry spell (CDD) at Koah by year
YearLongest dry spell (CDD)
193644 days
193769 days
193827 days
193980 days
194027 days
194161 days
194231 days
194364 days
194445 days
194544 days
194670 days
194736 days
194892 days
194949 days
195045 days
195138 days
195233 days
195339 days
195433 days
195546 days
195630 days
195775 days
195846 days
195958 days
196058 days
196155 days
196252 days
196334 days
196429 days
196573 days
196635 days
196756 days
196834 days
196943 days
197071 days
197151 days
197267 days
197335 days
197462 days
197527 days
197639 days
197746 days
197830 days
197954 days
198044 days
198147 days
198261 days
198335 days
198473 days
198532 days
198631 days
198737 days
198836 days
198949 days
199058 days
1991127 days
199283 days
199353 days
199448 days
199534 days
199692 days
199732 days
199842 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

59 years, 1937 to 1997

A day with at least 114.1 mm (4.5 in) of rain is expected about once in 2 years. A day with at least 353.5 mm (13.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Koah: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years114.1 mm (4.5 in)
5 years167.5 mm (6.6 in)
10 years206.8 mm (8.1 in)
25 years261.4 mm (10.3 in)
50 years305.8 mm (12.0 in)
100 years353.5 mm (13.9 in)Longer than the 59 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, 59 years of values from 1937 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: 275.3 mm (10.8 in) in 1967; 274.8 mm (10.8 in) in 1979; 253.8 mm (10.0 in) in 1974.

Download the Data

  • Data for Koah standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Koah 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 . Last revised (2025-12-31).