Derby Post Office Weather Records (ASN00091024)

Record envelope, standing records and threshold days for Derby Post Office (ASN00091024), Australia, with 60 years of record.

Key Facts for Derby Post Office

Derby Post Office (ASN00091024) is a weather station in Australia at -41.15 latitude and 147.80 longitude, 160 m (525 ft) above sea level.
The station reports from 1936 to 1995, 60 years of record.
0 records set at Derby Post Office still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Derby Post Office set a daily record precipitation of 24.0 mm (0.9 in) on 13 October 1995.

About the Station

Location: Australia, -41.15 latitude, 147.80 longitude.
Elevation: 160 m (525 ft).
Period of record: 1936 to 1995, 60 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 Derby Post Office. 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 Derby Post Office, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at Derby Post Office still stand.

Wettest Day of Each Month

Aug: 107.7 mm (4.2 in)

The wettest day on record for each calendar month at Derby Post Office. The most was 107.7 mm (4.2 in) on 24 August 1936.

Record daily precipitation for each month at Derby Post Office
Month	Record daily precipitation (mm)	Date
Jan	70.2 mm (2.8 in)	16 January 1977
Feb	91.4 mm (3.6 in)	15 February 1959
Mar	64.8 mm (2.6 in)	31 March 1975
Apr	76.2 mm (3.0 in)	2 April 1959
May	77.5 mm (3.1 in)	29 May 1969
Jun	63.5 mm (2.5 in)	5 June 1936
Jul	53.3 mm (2.1 in)	20 July 1946
Aug	107.7 mm (4.2 in)	24 August 1936
Sep	84.8 mm (3.3 in)	13 September 1974
Oct	56.1 mm (2.2 in)	11 October 1958
Nov	58.0 mm (2.3 in)	18 November 1978
Dec	102.9 mm (4.1 in)	16 December 1961

Latest Records

Latest records at Derby Post Office
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
13 October 1995	Derby Post Office, AU	daily rain	24.0 mm (0.9 in)	5.8 mm (0.23 in)	5 years	14 of 100 (Routine)
3 February 1995	Derby Post Office, AU	daily rain	15.4 mm (0.6 in)	2.7 mm (0.11 in)	56 years	20 of 100 (Routine)
9 February 1994	Derby Post Office, AU	daily rain	14.2 mm (0.6 in)	1.4 mm (0.06 in)	16 years	10 of 100 (Routine)
2 February 1994	Derby Post Office, AU	daily rain	25.6 mm (1.0 in)	9.3 mm (0.37 in)	40 years	23 of 100 (Routine)
9 January 1994	Derby Post Office, AU	daily rain	37.6 mm (1.5 in)	13.2 mm (0.5 in)	44 years	30 of 100 (Routine)
23 November 1993	Derby Post Office, AU	daily rain	53.4 mm (2.1 in)	28.0 mm (1.1 in)	24 years	43 of 100 (Notable)
15 November 1993	Derby Post Office, AU	daily rain	18.8 mm (0.7 in)	3.3 mm (0.13 in)	56 years	20 of 100 (Routine)
9 July 1993	Derby Post Office, AU	daily rain	39.8 mm (1.6 in)	21.5 mm (0.8 in)	44 years	38 of 100 (Notable)
22 June 1993	Derby Post Office, AU	daily rain	44.4 mm (1.7 in)	19.0 mm (0.7 in)	22 years	28 of 100 (Routine)
27 February 1993	Derby Post Office, AU	daily rain	19.6 mm (0.8 in)	5.0 mm (0.20 in)	18 years	13 of 100 (Routine)
19 November 1992	Derby Post Office, AU	daily rain	55.8 mm (2.2 in)	37.5 mm (1.5 in)	36 years	55 of 100 (Notable)
29 September 1992	Derby Post Office, AU	daily rain	38.8 mm (1.5 in)	17.5 mm (0.7 in)	33 years	33 of 100 (Routine)
1 September 1992	Derby Post Office, AU	daily rain	67.4 mm (2.7 in)	35.1 mm (1.4 in)	50 years	59 of 100 (Notable)
11 August 1992	Derby Post Office, AU	daily rain	34.4 mm (1.4 in)	2.4 mm (0.09 in)	14 years	11 of 100 (Routine)
26 May 1992	Derby Post Office, AU	daily rain	56.0 mm (2.2 in)	23.0 mm (0.9 in)	42 years	36 of 100 (Notable)
9 May 1992	Derby Post Office, AU	daily rain	27.2 mm (1.1 in)	4.8 mm (0.19 in)	31 years	18 of 100 (Routine)
3 January 1992	Derby Post Office, AU	daily rain	42.0 mm (1.7 in)	16.3 mm (0.6 in)	22 years	26 of 100 (Routine)
21 December 1991	Derby Post Office, AU	daily rain	45.4 mm (1.8 in)	15.2 mm (0.6 in)	5 years	20 of 100 (Routine)
19 December 1991	Derby Post Office, AU	daily rain	31.8 mm (1.3 in)	8.2 mm (0.32 in)	48 years	26 of 100 (Routine)
30 August 1991	Derby Post Office, AU	daily rain	19.8 mm (0.8 in)	4.6 mm (0.18 in)	0 years	9 of 100 (Routine)

Extremes by Year

1936 to 1995

Yearly extremes at Derby Post Office: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	107.7 mm (4.2 in)	1936	54.6 mm (2.1 in)	57
Wettest five days (Rx5day)	162.8 mm (6.4 in)	1956	92.0 mm (3.6 in)	57
Longest dry spell (CDD)	35 days	1965	19 days	57

Wettest day (Rx1day)

The wettest day of the year at Derby Post Office, 1936 to 1995. The record is 107.7 mm (4.2 in) in 1936, marked on the chart; the median year is 54.6 mm (2.1 in).

Wettest day (Rx1day) at Derby Post Office by year
Year	Wettest day (Rx1day)
1936	107.7 mm (4.2 in)
1937	50.8 mm (2.0 in)
1938	57.7 mm (2.3 in)
1939	57.7 mm (2.3 in)
1940	48.8 mm (1.9 in)
1941	54.6 mm (2.1 in)
1942	51.6 mm (2.0 in)
1943	69.1 mm (2.7 in)
1944	66.0 mm (2.6 in)
1945	76.2 mm (3.0 in)
1946	86.9 mm (3.4 in)
1947	26.2 mm (1.0 in)
1948	48.0 mm (1.9 in)
1949	64.0 mm (2.5 in)
1950	45.7 mm (1.8 in)
1951	45.7 mm (1.8 in)
1952	62.2 mm (2.4 in)
1953	36.1 mm (1.4 in)
1954	55.4 mm (2.2 in)
1955	52.1 mm (2.1 in)
1956	67.8 mm (2.7 in)
1957	74.9 mm (2.9 in)
1958	63.0 mm (2.5 in)
1959	91.4 mm (3.6 in)
1960	49.5 mm (1.9 in)
1961	102.9 mm (4.1 in)
1962	47.5 mm (1.9 in)
1963	45.5 mm (1.8 in)
1964	64.8 mm (2.6 in)
1965	48.3 mm (1.9 in)
1966	39.6 mm (1.6 in)
1967	63.5 mm (2.5 in)
1968	52.1 mm (2.1 in)
1969	77.5 mm (3.1 in)
1970	63.2 mm (2.5 in)
1971	53.1 mm (2.1 in)
1972	37.1 mm (1.5 in)
1973	46.0 mm (1.8 in)
1974	84.8 mm (3.3 in)
1975	64.8 mm (2.6 in)
1976	35.8 mm (1.4 in)
1977	70.2 mm (2.8 in)
1978	58.0 mm (2.3 in)
1982	64.0 mm (2.5 in)
1983	32.0 mm (1.3 in)
1984	59.2 mm (2.3 in)
1985	35.4 mm (1.4 in)
1986	63.0 mm (2.5 in)
1987	31.6 mm (1.2 in)
1988	30.2 mm (1.2 in)
1989	60.0 mm (2.4 in)
1990	43.6 mm (1.7 in)
1991	46.8 mm (1.8 in)
1992	67.4 mm (2.7 in)
1993	53.4 mm (2.1 in)
1994	37.6 mm (1.5 in)
1995	24.0 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Derby Post Office, 1936 to 1995. The record is 162.8 mm (6.4 in) in 1956, marked on the chart; the median year is 92.0 mm (3.6 in).

Wettest five days (Rx5day) at Derby Post Office by year
Year	Wettest five days (Rx5day)
1936	160.1 mm (6.3 in)
1937	68.6 mm (2.7 in)
1938	82.3 mm (3.2 in)
1939	109.2 mm (4.3 in)
1940	68.4 mm (2.7 in)
1941	82.0 mm (3.2 in)
1942	126.8 mm (5.0 in)
1943	92.0 mm (3.6 in)
1944	138.8 mm (5.5 in)
1945	161.6 mm (6.4 in)
1946	157.7 mm (6.2 in)
1947	26.7 mm (1.1 in)
1948	75.7 mm (3.0 in)
1949	70.0 mm (2.8 in)
1950	81.0 mm (3.2 in)
1951	86.6 mm (3.4 in)
1952	88.9 mm (3.5 in)
1953	50.3 mm (2.0 in)
1954	88.6 mm (3.5 in)
1955	84.4 mm (3.3 in)
1956	162.8 mm (6.4 in)
1957	112.8 mm (4.4 in)
1958	140.8 mm (5.5 in)
1959	143.0 mm (5.6 in)
1960	92.7 mm (3.6 in)
1961	140.2 mm (5.5 in)
1962	96.6 mm (3.8 in)
1963	101.3 mm (4.0 in)
1964	95.3 mm (3.8 in)
1965	139.5 mm (5.5 in)
1966	95.0 mm (3.7 in)
1967	135.4 mm (5.3 in)
1968	101.6 mm (4.0 in)
1969	144.3 mm (5.7 in)
1970	130.8 mm (5.1 in)
1971	118.6 mm (4.7 in)
1972	61.2 mm (2.4 in)
1973	78.2 mm (3.1 in)
1974	112.0 mm (4.4 in)
1975	89.2 mm (3.5 in)
1976	75.3 mm (3.0 in)
1977	114.4 mm (4.5 in)
1978	79.0 mm (3.1 in)
1982	106.0 mm (4.2 in)
1983	103.0 mm (4.1 in)
1984	59.2 mm (2.3 in)
1985	48.4 mm (1.9 in)
1986	77.4 mm (3.0 in)
1987	55.0 mm (2.2 in)
1988	35.6 mm (1.4 in)
1989	105.8 mm (4.2 in)
1990	38.8 mm (1.5 in)
1991	84.2 mm (3.3 in)
1992	100.2 mm (3.9 in)
1993	63.6 mm (2.5 in)
1994	38.6 mm (1.5 in)
1995	31.2 mm (1.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Derby Post Office, 1936 to 1995. The record is 35 days in 1965, marked on the chart; the median year is 19 days.

Longest dry spell (CDD) at Derby Post Office by year
Year	Longest dry spell (CDD)
1936	8 days
1937	19 days
1938	11 days
1939	29 days
1940	21 days
1941	21 days
1942	16 days
1943	22 days
1944	15 days
1945	17 days
1946	10 days
1947	8 days
1948	29 days
1949	18 days
1950	21 days
1951	20 days
1952	17 days
1953	11 days
1954	26 days
1955	27 days
1956	24 days
1957	17 days
1958	21 days
1959	22 days
1960	23 days
1961	32 days
1962	23 days
1963	21 days
1964	19 days
1965	35 days
1966	19 days
1967	23 days
1968	19 days
1969	20 days
1970	22 days
1971	14 days
1972	22 days
1973	14 days
1974	22 days
1975	27 days
1976	26 days
1977	17 days
1978	13 days
1982	14 days
1983	21 days
1984	17 days
1985	15 days
1986	17 days
1987	21 days
1988	25 days
1989	13 days
1990	15 days
1991	14 days
1992	11 days
1993	11 days
1994	22 days
1995	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.

Rainfall Return Levels

38 years, 1937 to 1978

A day with at least 57.6 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 109.3 mm (4.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Derby Post Office: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	57.6 mm (2.3 in)
5 years	71.4 mm (2.8 in)
10 years	80.6 mm (3.2 in)
25 years	92.2 mm (3.6 in)
50 years	100.8 mm (4.0 in)	Longer than the 38 years of record
100 years	109.3 mm (4.3 in)	Longer than the 38 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, 38 years of values from 1937 to 1978.

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: 102.9 mm (4.1 in) in 1961; 91.4 mm (3.6 in) in 1959; 86.9 mm (3.4 in) in 1946.

Download the Data

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

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a