Mackay Post Office Weather Records (ASN00033046)

Record envelope, standing records and threshold days for Mackay Post Office (ASN00033046), Australia, with 80 years of record.

Key Facts for Mackay Post Office

Mackay Post Office (ASN00033046) is a weather station in Australia at -21.15 latitude and 149.18 longitude, 11 m (36 ft) above sea level.
The station reports from 1871 to 1950, 80 years of record.
1,464 records set at Mackay Post Office still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Mackay Post Office set a daily record precipitation of 61.7 mm (2.4 in) on 17 April 1950.

About the Station

Location: Australia, -21.15 latitude, 149.18 longitude.
Elevation: 11 m (36 ft).
Period of record: 1871 to 1950, 80 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 Mackay 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 Mackay Post Office, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	37.7 C (99.9 F)	15.6 C (60.1 F)	n/a	n/a
Feb	37.9 C (100.2 F)	15.7 C (60.3 F)	n/a	n/a
Mar	36.7 C (98.1 F)	13.3 C (55.9 F)	n/a	n/a
Apr	35.0 C (95.0 F)	9.4 C (48.9 F)	n/a	n/a
May	31.6 C (88.9 F)	5.3 C (41.5 F)	n/a	n/a
Jun	29.9 C (85.8 F)	2.8 C (37.0 F)	n/a	n/a
Jul	30.0 C (86.0 F)	1.7 C (35.1 F)	n/a	n/a
Aug	31.1 C (88.0 F)	2.2 C (36.0 F)	n/a	n/a
Sep	33.3 C (91.9 F)	4.2 C (39.6 F)	n/a	n/a
Oct	36.1 C (97.0 F)	6.7 C (44.1 F)	n/a	n/a
Nov	36.4 C (97.5 F)	8.1 C (46.6 F)	n/a	n/a
Dec	37.7 C (99.9 F)	15.6 C (60.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mackay Post Office still stand. 1899 holds the most, with 46.

Standing records at Mackay Post Office by the year they were set
Year set	Standing records
1889	1
1890	17
1891	23
1892	28
1893	27
1894	18
1895	17
1896	32
1897	35
1898	18
1899	46
1900	27
1901	24
1902	25
1903	27
1904	13
1905	46
1906	14
1907	17
1908	33
1909	25
1910	28
1911	16
1912	10
1913	23
1914	11
1915	37
1916	31
1917	34
1918	16
1919	10
1920	28
1921	26
1922	19
1923	20
1924	22
1925	24
1926	22
1927	25
1928	25
1929	38
1930	10
1931	23
1932	24
1933	30
1934	16
1935	20
1936	27
1937	19
1938	35
1939	40
1940	23
1941	7
1942	31
1943	30
1944	13
1945	21
1946	33
1947	34
1948	31
1949	16
1950	3

All-Time Record Progression

6 new records

6 all-time records were set at Mackay Post Office between 22 January 1918 and 28 January 1947. Each dot is a new record.

When Mackay Post Office set new all-time records
Date	Kind	Detail
1918-01-22	Record daily precipitation	Record daily precipitation 627.4 mm (24.7 in)
1922-07-02	Record low maximum temperature	Record low maximum temperature 14.1 C (57.4 F)
1922-07-08	Record low maximum temperature	Record low maximum temperature 13.9 C (57.0 F)
1927-07-23	Record low maximum temperature	Record low maximum temperature 12.9 C (55.2 F)
1938-07-03	Record low maximum temperature	Record low maximum temperature 10.0 C (50.0 F)
1947-01-28	Record high minimum temperature	Record high minimum temperature 30.0 C (86.0 F)

Wettest Day of Each Month

Jan: 627.4 mm (24.7 in)

The wettest day on record for each calendar month at Mackay Post Office. The most was 627.4 mm (24.7 in) on 22 January 1918.

Record daily precipitation for each month at Mackay Post Office
Month	Record daily precipitation (mm)	Date
Jan	627.4 mm (24.7 in)	22 January 1918
Feb	303.5 mm (11.9 in)	3 February 1898
Mar	294.6 mm (11.6 in)	26 March 1928
Apr	179.6 mm (7.1 in)	3 April 1929
May	133.4 mm (5.3 in)	22 May 1906
Jun	110.7 mm (4.4 in)	7 June 1891
Jul	135.1 mm (5.3 in)	1 July 1921
Aug	115.3 mm (4.5 in)	22 August 1893
Sep	206.8 mm (8.1 in)	30 September 1904
Oct	128.0 mm (5.0 in)	24 October 1912
Nov	129.5 mm (5.1 in)	30 November 1931
Dec	354.6 mm (14.0 in)	23 December 1909

Period of Record Coverage

1889 to 1950

62 years of record at Mackay Post Office, 1889 to 1950. 5 years have data for under 90 percent of days and are left out of rankings: 1889, 1893, 1894, 1941, 1950.

Days with data per year at Mackay Post Office
Year	Days with data	Share of year	Complete
1889	58	16%	No
1890	363	99%	Yes
1891	358	98%	Yes
1892	334	91%	Yes
1893	313	86%	No
1894	293	80%	No
1895	347	95%	Yes
1896	364	99%	Yes
1897	365	100%	Yes
1898	364	100%	Yes
1899	365	100%	Yes
1900	363	99%	Yes
1901	365	100%	Yes
1902	365	100%	Yes
1903	365	100%	Yes
1904	353	96%	Yes
1905	363	99%	Yes
1906	359	98%	Yes
1907	361	99%	Yes
1908	366	100%	Yes
1909	364	100%	Yes
1910	363	99%	Yes
1911	364	100%	Yes
1912	366	100%	Yes
1913	365	100%	Yes
1914	365	100%	Yes
1915	365	100%	Yes
1916	366	100%	Yes
1917	364	100%	Yes
1918	364	100%	Yes
1919	365	100%	Yes
1920	365	100%	Yes
1921	364	100%	Yes
1922	361	99%	Yes
1923	364	100%	Yes
1924	364	99%	Yes
1925	365	100%	Yes
1926	364	100%	Yes
1927	364	100%	Yes
1928	366	100%	Yes
1929	363	99%	Yes
1930	365	100%	Yes
1931	363	99%	Yes
1932	366	100%	Yes
1933	365	100%	Yes
1934	364	100%	Yes
1935	364	100%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	363	99%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	184	50%	No
1942	364	100%	Yes
1943	365	100%	Yes
1944	362	99%	Yes
1945	365	100%	Yes
1946	358	98%	Yes
1947	356	98%	Yes
1948	365	100%	Yes
1949	364	100%	Yes
1950	120	33%	No

Latest Records

Latest records at Mackay Post Office
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1950	Mackay Post Office, AU	daily rain	61.7 mm (2.4 in)	27.4 mm (1.1 in)	48 years	36 of 100 (Notable)
17 April 1950	Mackay Post Office, AU	daily low max	23.3 C (73.9 F)	0.6 C (1.1 F)	32 years	18 of 100 (Routine)
15 April 1950	Mackay Post Office, AU	daily low max	24.4 C (75.9 F)	0.7 C (1.3 F)	59 years	26 of 100 (Routine)
23 March 1950	Mackay Post Office, AU	daily high max (Tie)	33.9 C (93.0 F)	tie	4 years	1 of 100 (Routine)
4 March 1950	Mackay Post Office, AU	daily rain	141.0 mm (5.6 in)	11.5 mm (0.5 in)	4 years	12 of 100 (Routine)
2 March 1950	Mackay Post Office, AU	daily rain	117.3 mm (4.6 in)	49.5 mm (1.9 in)	50 years	38 of 100 (Notable)
19 February 1950	Mackay Post Office, AU	daily high min	25.6 C (78.1 F)	0.6 C (1.1 F)	18 years	14 of 100 (Routine)
18 February 1950	Mackay Post Office, AU	daily high min (Tie)	25.6 C (78.1 F)	tie	26 years	3 of 100 (Routine)
17 January 1950	Mackay Post Office, AU	daily rain	90.4 mm (3.6 in)	34.5 mm (1.4 in)	55 years	31 of 100 (Routine)
11 January 1950	Mackay Post Office, AU	daily high min (Tie)	26.1 C (79.0 F)	tie	28 years	3 of 100 (Routine)
27 December 1949	Mackay Post Office, AU	daily high min (Tie)	26.1 C (79.0 F)	tie	26 years	3 of 100 (Routine)
4 November 1949	Mackay Post Office, AU	daily high max (Tie)	31.7 C (89.1 F)	tie	44 years	4 of 100 (Routine)
3 November 1949	Mackay Post Office, AU	daily high max	35.6 C (96.1 F)	3.9 C (7.0 F)	44 years	41 of 100 (Notable)
17 October 1949	Mackay Post Office, AU	daily high min (Tie)	23.3 C (73.9 F)	tie	42 years	4 of 100 (Routine)
16 October 1949	Mackay Post Office, AU	daily high min	23.9 C (75.0 F)	0.5 C (0.9 F)	56 years	24 of 100 (Routine)
15 October 1949	Mackay Post Office, AU	daily high min (Tie)	23.3 C (73.9 F)	tie	6 years	1 of 100 (Routine)
14 October 1949	Mackay Post Office, AU	daily high min (Tie)	23.3 C (73.9 F)	tie	56 years	5 of 100 (Routine)
13 October 1949	Mackay Post Office, AU	daily high min	23.9 C (75.0 F)	0.2 C (0.4 F)	6 years	7 of 100 (Routine)
12 October 1949	Mackay Post Office, AU	daily high min (Tie)	22.8 C (73.0 F)	tie	48 years	5 of 100 (Routine)
10 October 1949	Mackay Post Office, AU	daily rain	18.8 mm (0.7 in)	10.2 mm (0.4 in)	22 years	18 of 100 (Routine)

Climate Trend

56 complete years, 1890 to 1949

One stripe for each of 56 complete years at Mackay Post Office, 1890 to 1949. Blue stripes are years cooler than the station's own mean of 22.5 C (72.4 F); red stripes are warmer. The coolest year was 1925, at 21.1 C (70.1 F), and the warmest was 1947, at 23.6 C (74.4 F). The strongest colour marks a difference of 1.4 C (2.5 F).

Annual mean temperature at Mackay Post Office as warming stripes, 1890 to 1949
Year	Annual mean temperature	Difference from the station mean
1890	22.2 C	-0.28 C
1891	21.8 C	-0.63 C
1892	23.0 C	+0.49 C
1893	22.7 C	+0.21 C
1896	21.7 C	-0.80 C
1897	22.9 C	+0.41 C
1898	22.2 C	-0.30 C
1899	21.7 C	-0.74 C
1900	22.8 C	+0.36 C
1901	22.3 C	-0.13 C
1902	22.4 C	-0.08 C
1903	22.4 C	-0.08 C
1904	22.2 C	-0.25 C
1905	22.2 C	-0.29 C
1906	22.9 C	+0.43 C
1907	22.9 C	+0.42 C
1908	22.1 C	-0.41 C
1909	22.4 C	-0.05 C
1910	22.6 C	+0.09 C
1911	22.2 C	-0.27 C
1912	22.6 C	+0.14 C
1913	22.0 C	-0.50 C
1914	22.4 C	-0.04 C
1915	23.0 C	+0.49 C
1916	22.5 C	-0.02 C
1917	21.7 C	-0.73 C
1918	21.8 C	-0.64 C
1919	22.1 C	-0.40 C
1920	22.4 C	-0.11 C
1921	22.5 C	+0.06 C
1922	22.3 C	-0.19 C
1923	22.1 C	-0.34 C
1924	22.3 C	-0.19 C
1925	21.1 C	-1.33 C
1926	22.7 C	+0.23 C
1927	22.1 C	-0.38 C
1928	22.1 C	-0.33 C
1929	22.1 C	-0.37 C
1930	22.1 C	-0.34 C
1931	23.1 C	+0.61 C
1932	22.3 C	-0.18 C
1933	22.5 C	-0.02 C
1934	22.3 C	-0.15 C
1935	22.6 C	+0.13 C
1936	22.8 C	+0.28 C
1937	22.3 C	-0.13 C
1938	22.9 C	+0.38 C
1939	23.1 C	+0.60 C
1940	23.2 C	+0.69 C
1942	23.4 C	+0.97 C
1943	23.1 C	+0.64 C
1944	22.8 C	+0.30 C
1945	23.3 C	+0.87 C
1946	22.8 C	+0.29 C
1947	23.6 C	+1.08 C
1949	23.0 C	+0.52 C

The annual mean temperature here has risen by 0.12 C (0.05 to 0.19) per decade over 1890 to 1949. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Mackay Post Office
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.12 C (0.05 to 0.19) per decade	0.2 F (0.1 to 0.3) per decade	1890 to 1949	56	Rise
Mean daily maximum	0.05 C (-0.05 to 0.15) per decade	0.1 F (-0.1 to 0.3) per decade	1890 to 1949	56	Not clearly different from zero
Mean daily minimum	0.2 C (0.1 to 0.3) per decade	0.3 F (0.2 to 0.5) per decade	1890 to 1949	56	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

1871 to 1950

Yearly extremes at Mackay Post Office: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.9 C (100.2 F)	1904	35.1 C (95.2 F)	62
Coldest night (TNn)	1.7 C (35.1 F)	1899	5.0 C (41.0 F)	62
Wettest day (Rx1day)	627.4 mm (24.7 in)	1918	141.0 mm (5.6 in)	73
Wettest five days (Rx5day)	1,440.8 mm (56.7 in)	1918	314.2 mm (12.4 in)	73
Longest dry spell (CDD)	84 days	1928	33 days	73

Hottest day (TXx)

The hottest day of the year at Mackay Post Office, 1871 to 1950. The record is 37.9 C (100.2 F) in 1904, marked on the chart; the median year is 35.1 C (95.2 F).

Hottest day (TXx) at Mackay Post Office by year
Year	Hottest day (TXx)
1871	n/a
1874	n/a
1875	n/a
1876	n/a
1877	n/a
1880	n/a
1881	n/a
1882	n/a
1883	n/a
1887	n/a
1888	n/a
1889	31.2 C (88.2 F)
1890	35.1 C (95.2 F)
1891	34.4 C (93.9 F)
1892	33.9 C (93.0 F)
1893	36.4 C (97.5 F)
1894	35.8 C (96.4 F)
1895	35.6 C (96.1 F)
1896	32.8 C (91.0 F)
1897	36.1 C (97.0 F)
1898	33.3 C (91.9 F)
1899	36.7 C (98.1 F)
1900	35.0 C (95.0 F)
1901	34.2 C (93.6 F)
1902	37.2 C (99.0 F)
1903	35.0 C (95.0 F)
1904	37.9 C (100.2 F)
1905	35.4 C (95.7 F)
1906	33.1 C (91.6 F)
1907	34.4 C (93.9 F)
1908	34.2 C (93.6 F)
1909	35.0 C (95.0 F)
1910	34.4 C (93.9 F)
1911	34.4 C (93.9 F)
1912	33.9 C (93.0 F)
1913	35.6 C (96.1 F)
1914	34.3 C (93.7 F)
1915	37.7 C (99.9 F)
1916	34.4 C (93.9 F)
1917	35.2 C (95.4 F)
1918	34.1 C (93.4 F)
1919	35.0 C (95.0 F)
1920	33.9 C (93.0 F)
1921	36.1 C (97.0 F)
1922	36.6 C (97.9 F)
1923	35.2 C (95.4 F)
1924	36.6 C (97.9 F)
1925	33.7 C (92.7 F)
1926	34.0 C (93.2 F)
1927	35.3 C (95.5 F)
1928	35.4 C (95.7 F)
1929	36.0 C (96.8 F)
1930	34.2 C (93.6 F)
1931	36.4 C (97.5 F)
1932	34.4 C (93.9 F)
1933	34.7 C (94.5 F)
1934	35.8 C (96.4 F)
1935	37.4 C (99.3 F)
1936	34.1 C (93.4 F)
1937	35.0 C (95.0 F)
1938	36.6 C (97.9 F)
1939	37.3 C (99.1 F)
1940	37.7 C (99.9 F)
1941	32.9 C (91.2 F)
1942	35.1 C (95.2 F)
1943	34.4 C (93.9 F)
1944	35.0 C (95.0 F)
1945	36.7 C (98.1 F)
1946	36.7 C (98.1 F)
1947	35.6 C (96.1 F)
1948	36.7 C (98.1 F)
1949	37.8 C (100.0 F)
1950	35.6 C (96.1 F)

Coldest night (TNn)

The coldest night of the year at Mackay Post Office, 1871 to 1950. The record is 1.7 C (35.1 F) in 1899, marked on the chart; the median year is 5.0 C (41.0 F).

Coldest night (TNn) at Mackay Post Office by year
Year	Coldest night (TNn)
1871	n/a
1874	n/a
1875	n/a
1876	n/a
1877	n/a
1880	n/a
1881	n/a
1882	n/a
1883	n/a
1887	n/a
1888	n/a
1889	18.8 C (65.8 F)
1890	4.4 C (39.9 F)
1891	3.9 C (39.0 F)
1892	4.8 C (40.6 F)
1893	2.2 C (36.0 F)
1894	3.3 C (37.9 F)
1895	3.3 C (37.9 F)
1896	2.5 C (36.5 F)
1897	3.9 C (39.0 F)
1898	5.0 C (41.0 F)
1899	1.7 C (35.1 F)
1900	5.1 C (41.2 F)
1901	2.2 C (36.0 F)
1902	4.2 C (39.6 F)
1903	5.3 C (41.5 F)
1904	3.6 C (38.5 F)
1905	3.9 C (39.0 F)
1906	5.6 C (42.1 F)
1907	4.7 C (40.5 F)
1908	3.3 C (37.9 F)
1909	5.0 C (41.0 F)
1910	4.4 C (39.9 F)
1911	5.0 C (41.0 F)
1912	6.0 C (42.8 F)
1913	4.1 C (39.4 F)
1914	3.3 C (37.9 F)
1915	6.1 C (43.0 F)
1916	2.8 C (37.0 F)
1917	5.6 C (42.1 F)
1918	2.4 C (36.3 F)
1919	3.9 C (39.0 F)
1920	4.3 C (39.7 F)
1921	5.0 C (41.0 F)
1922	5.2 C (41.4 F)
1923	5.0 C (41.0 F)
1924	5.2 C (41.4 F)
1925	3.3 C (37.9 F)
1926	4.4 C (39.9 F)
1927	4.4 C (39.9 F)
1928	5.7 C (42.3 F)
1929	3.9 C (39.0 F)
1930	4.4 C (39.9 F)
1931	5.8 C (42.4 F)
1932	5.0 C (41.0 F)
1933	6.1 C (43.0 F)
1934	6.6 C (43.9 F)
1935	6.8 C (44.2 F)
1936	6.6 C (43.9 F)
1937	5.4 C (41.7 F)
1938	5.3 C (41.5 F)
1939	5.3 C (41.5 F)
1940	5.9 C (42.6 F)
1941	4.2 C (39.6 F)
1942	6.2 C (43.2 F)
1943	3.3 C (37.9 F)
1944	5.6 C (42.1 F)
1945	5.6 C (42.1 F)
1946	5.6 C (42.1 F)
1947	5.0 C (41.0 F)
1948	6.1 C (43.0 F)
1949	5.0 C (41.0 F)
1950	14.4 C (57.9 F)

Wettest day (Rx1day)

The wettest day of the year at Mackay Post Office, 1871 to 1950. The record is 627.4 mm (24.7 in) in 1918, marked on the chart; the median year is 141.0 mm (5.6 in).

Wettest day (Rx1day) at Mackay Post Office by year
Year	Wettest day (Rx1day)
1871	0.0 mm (0.00 in)
1874	0.0 mm (0.00 in)
1875	0.0 mm (0.00 in)
1876	0.0 mm (0.00 in)
1877	0.0 mm (0.00 in)
1880	0.0 mm (0.00 in)
1881	0.0 mm (0.00 in)
1882	0.0 mm (0.00 in)
1883	0.0 mm (0.00 in)
1887	97.8 mm (3.9 in)
1888	256.5 mm (10.1 in)
1889	140.7 mm (5.5 in)
1890	181.4 mm (7.1 in)
1891	164.8 mm (6.5 in)
1892	124.0 mm (4.9 in)
1893	265.7 mm (10.5 in)
1894	159.3 mm (6.3 in)
1895	149.9 mm (5.9 in)
1896	194.8 mm (7.7 in)
1897	73.7 mm (2.9 in)
1898	303.5 mm (11.9 in)
1899	121.7 mm (4.8 in)
1900	144.8 mm (5.7 in)
1901	250.4 mm (9.9 in)
1902	114.8 mm (4.5 in)
1903	128.3 mm (5.1 in)
1904	265.4 mm (10.4 in)
1905	184.2 mm (7.3 in)
1906	133.4 mm (5.3 in)
1907	103.1 mm (4.1 in)
1908	165.1 mm (6.5 in)
1909	354.6 mm (14.0 in)
1910	261.9 mm (10.3 in)
1911	167.9 mm (6.6 in)
1912	128.0 mm (5.0 in)
1913	254.8 mm (10.0 in)
1914	178.3 mm (7.0 in)
1915	105.4 mm (4.1 in)
1916	102.9 mm (4.1 in)
1917	119.4 mm (4.7 in)
1918	627.4 mm (24.7 in)
1919	85.6 mm (3.4 in)
1920	127.8 mm (5.0 in)
1921	242.1 mm (9.5 in)
1922	102.1 mm (4.0 in)
1923	75.7 mm (3.0 in)
1924	128.3 mm (5.1 in)
1925	168.9 mm (6.6 in)
1926	125.2 mm (4.9 in)
1927	286.5 mm (11.3 in)
1928	294.6 mm (11.6 in)
1929	179.6 mm (7.1 in)
1930	155.4 mm (6.1 in)
1931	129.5 mm (5.1 in)
1932	335.0 mm (13.2 in)
1933	133.4 mm (5.3 in)
1934	107.7 mm (4.2 in)
1935	240.0 mm (9.4 in)
1936	198.1 mm (7.8 in)
1937	167.6 mm (6.6 in)
1938	144.8 mm (5.7 in)
1939	70.6 mm (2.8 in)
1940	185.2 mm (7.3 in)
1941	178.8 mm (7.0 in)
1942	139.7 mm (5.5 in)
1943	200.7 mm (7.9 in)
1944	96.0 mm (3.8 in)
1945	118.9 mm (4.7 in)
1946	172.7 mm (6.8 in)
1947	141.5 mm (5.6 in)
1948	87.6 mm (3.4 in)
1949	265.2 mm (10.4 in)
1950	141.0 mm (5.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mackay Post Office, 1871 to 1950. The record is 1,440.8 mm (56.7 in) in 1918, marked on the chart; the median year is 314.2 mm (12.4 in).

Wettest five days (Rx5day) at Mackay Post Office by year
Year	Wettest five days (Rx5day)
1871	0.0 mm (0.00 in)
1874	0.0 mm (0.00 in)
1875	0.0 mm (0.00 in)
1876	0.0 mm (0.00 in)
1877	0.0 mm (0.00 in)
1880	0.0 mm (0.00 in)
1881	0.0 mm (0.00 in)
1882	0.0 mm (0.00 in)
1883	0.0 mm (0.00 in)
1887	176.3 mm (6.9 in)
1888	491.9 mm (19.4 in)
1889	218.0 mm (8.6 in)
1890	486.9 mm (19.2 in)
1891	390.8 mm (15.4 in)
1892	219.0 mm (8.6 in)
1893	314.2 mm (12.4 in)
1894	319.1 mm (12.6 in)
1895	473.7 mm (18.6 in)
1896	403.6 mm (15.9 in)
1897	181.4 mm (7.1 in)
1898	551.6 mm (21.7 in)
1899	208.6 mm (8.2 in)
1900	380.7 mm (15.0 in)
1901	530.6 mm (20.9 in)
1902	210.1 mm (8.3 in)
1903	231.7 mm (9.1 in)
1904	344.1 mm (13.5 in)
1905	333.5 mm (13.1 in)
1906	299.2 mm (11.8 in)
1907	168.7 mm (6.6 in)
1908	352.3 mm (13.9 in)
1909	541.5 mm (21.3 in)
1910	415.4 mm (16.4 in)
1911	330.2 mm (13.0 in)
1912	183.9 mm (7.2 in)
1913	508.3 mm (20.0 in)
1914	427.4 mm (16.8 in)
1915	179.3 mm (7.1 in)
1916	284.3 mm (11.2 in)
1917	333.0 mm (13.1 in)
1918	1,440.8 mm (56.7 in)
1919	154.0 mm (6.1 in)
1920	309.1 mm (12.2 in)
1921	534.7 mm (21.1 in)
1922	226.0 mm (8.9 in)
1923	174.2 mm (6.9 in)
1924	313.0 mm (12.3 in)
1925	213.1 mm (8.4 in)
1926	146.0 mm (5.7 in)
1927	499.8 mm (19.7 in)
1928	359.9 mm (14.2 in)
1929	413.8 mm (16.3 in)
1930	365.0 mm (14.4 in)
1931	172.0 mm (6.8 in)
1932	586.0 mm (23.1 in)
1933	273.6 mm (10.8 in)
1934	158.0 mm (6.2 in)
1935	406.1 mm (16.0 in)
1936	486.1 mm (19.1 in)
1937	404.1 mm (15.9 in)
1938	394.7 mm (15.5 in)
1939	199.1 mm (7.8 in)
1940	446.2 mm (17.6 in)
1941	256.1 mm (10.1 in)
1942	397.7 mm (15.7 in)
1943	340.6 mm (13.4 in)
1944	258.6 mm (10.2 in)
1945	242.7 mm (9.6 in)
1946	488.1 mm (19.2 in)
1947	395.3 mm (15.6 in)
1948	226.0 mm (8.9 in)
1949	325.7 mm (12.8 in)
1950	318.0 mm (12.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mackay Post Office, 1871 to 1950. The record is 84 days in 1928, marked on the chart; the median year is 33 days.

Longest dry spell (CDD) at Mackay Post Office by year
Year	Longest dry spell (CDD)
1871	31 days
1874	31 days
1875	31 days
1876	61 days
1877	31 days
1880	31 days
1881	31 days
1882	31 days
1883	61 days
1887	38 days
1888	31 days
1889	42 days
1890	44 days
1891	28 days
1892	29 days
1893	54 days
1894	25 days
1895	35 days
1896	36 days
1897	23 days
1898	76 days
1899	40 days
1900	27 days
1901	22 days
1902	48 days
1903	31 days
1904	48 days
1905	27 days
1906	42 days
1907	32 days
1908	35 days
1909	27 days
1910	23 days
1911	37 days
1912	57 days
1913	69 days
1914	33 days
1915	37 days
1916	20 days
1917	52 days
1918	39 days
1919	25 days
1920	26 days
1921	17 days
1922	40 days
1923	71 days
1924	24 days
1925	35 days
1926	50 days
1927	18 days
1928	84 days
1929	46 days
1930	26 days
1931	34 days
1932	36 days
1933	25 days
1934	27 days
1935	32 days
1936	25 days
1937	26 days
1938	36 days
1939	41 days
1940	48 days
1941	72 days
1942	22 days
1943	64 days
1944	29 days
1945	33 days
1946	82 days
1947	28 days
1948	39 days
1949	53 days
1950	8 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

63 years, 1887 to 1949

A day with at least 154.7 mm (6.1 in) of rain is expected about once in 2 years. A day with at least 509.1 mm (20.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Mackay 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	154.7 mm (6.1 in)
5 years	224.4 mm (8.8 in)
10 years	279.3 mm (11.0 in)
25 years	360.3 mm (14.2 in)
50 years	430.2 mm (16.9 in)
100 years	509.1 mm (20.0 in)	Longer than the 63 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, 63 years of values from 1887 to 1949.

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: 627.4 mm (24.7 in) in 1918; 354.6 mm (14.0 in) in 1909; 335.0 mm (13.2 in) in 1932.

Download the Data

Data for Mackay Post Office standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mackay 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 2026-10-13 (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).