Rochester Weather Records (ASN00080049)

Record envelope, standing records and threshold days for Rochester (ASN00080049), Australia, with 123 years of record.

Key Facts for Rochester

Rochester (ASN00080049) is a weather station in Australia at -36.36 latitude and 144.71 longitude, 114 m (374 ft) above sea level.
The station reports from 1904 to 2026, 123 years of record.
1,464 records set at Rochester still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Rochester set a daily record precipitation of 13.2 mm (0.5 in) on 25 August 2026 (provisional).

Provisional Records

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

About the Station

Location: Australia, -36.36 latitude, 144.71 longitude.
Elevation: 114 m (374 ft).
Period of record: 1904 to 2026, 123 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 Rochester. 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 Rochester, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	45.0 C (113.0 F)	5.6 C (42.1 F)	n/a	n/a
Feb	42.9 C (109.2 F)	7.2 C (45.0 F)	n/a	n/a
Mar	40.0 C (104.0 F)	4.0 C (39.2 F)	n/a	n/a
Apr	31.7 C (89.1 F)	1.0 C (33.8 F)	n/a	n/a
May	26.4 C (79.5 F)	-0.8 C (30.6 F)	n/a	n/a
Jun	20.1 C (68.2 F)	-2.8 C (27.0 F)	n/a	n/a
Jul	23.7 C (74.7 F)	-2.5 C (27.5 F)	n/a	n/a
Aug	23.3 C (73.9 F)	-2.5 C (27.5 F)	n/a	n/a
Sep	29.4 C (84.9 F)	-1.3 C (29.7 F)	n/a	n/a
Oct	36.7 C (98.1 F)	-0.6 C (30.9 F)	n/a	n/a
Nov	39.0 C (102.2 F)	2.1 C (35.8 F)	n/a	n/a
Dec	40.4 C (104.7 F)	4.6 C (40.3 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Rochester still stand. 1965 holds the most, with 173.

All-Time Record Progression

4 new records

4 all-time records were set at Rochester between 4 January 1941 and 21 February 1973. Each dot is a new record.

When Rochester set new all-time records
Date	Kind	Detail
1941-01-04	Record daily precipitation	Record daily precipitation 64.3 mm (2.5 in)
1950-03-18	Record daily precipitation	Record daily precipitation 82.6 mm (3.3 in)
1951-02-20	Record daily precipitation	Record daily precipitation 88.1 mm (3.5 in)
1973-02-21	Record daily precipitation	Record daily precipitation 97.5 mm (3.8 in)

Wettest Day of Each Month

Feb: 97.5 mm (3.8 in)

The wettest day on record for each calendar month at Rochester. The most was 97.5 mm (3.8 in) on 21 February 1973.

Record daily precipitation for each month at Rochester
Month	Record daily precipitation (mm)	Date
Jan	64.3 mm (2.5 in)	4 January 1941
Feb	97.5 mm (3.8 in)	21 February 1973
Mar	82.6 mm (3.3 in)	18 March 1950
Apr	53.1 mm (2.1 in)	4 April 1929
May	64.8 mm (2.6 in)	24 May 1951
Jun	58.8 mm (2.3 in)	8 June 2023
Jul	45.5 mm (1.8 in)	26 July 1936
Aug	43.2 mm (1.7 in)	26 August 1924
Sep	68.1 mm (2.7 in)	25 September 2014
Oct	70.2 mm (2.8 in)	13 October 2022
Nov	78.0 mm (3.1 in)	12 November 1998
Dec	57.9 mm (2.3 in)	7 December 1930

Period of Record Coverage

1965 to 1975

11 years of record at Rochester, 1965 to 1975. 1 years have data for under 90 percent of days and are left out of rankings: 1975.

Days with data per year at Rochester
Year	Days with data	Share of year	Complete
1965	364	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	363	99%	Yes
1974	365	100%	Yes
1975	212	58%	No

Latest Records

Latest records at Rochester
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 August 2026	Rochester, AU	daily rain (Provisional)	13.2 mm (0.5 in)	2.3 mm (0.09 in)	60 years	20 of 100 (Routine)
10 August 2026	Rochester, AU	daily rain	33.4 mm (1.3 in)	14.4 mm (0.6 in)	16 years	41 of 100 (Notable)
1 July 2026	Rochester, AU	daily rain	15.4 mm (0.6 in)	3.6 mm (0.14 in)	23 years	20 of 100 (Routine)
30 June 2026	Rochester, AU	daily rain	27.0 mm (1.1 in)	6.0 mm (0.24 in)	35 years	30 of 100 (Routine)
2 March 2026	Rochester, AU	daily rain	73.6 mm (2.9 in)	58.4 mm (2.3 in)	4 years	51 of 100 (Notable)
23 February 2026	Rochester, AU	daily rain	20.0 mm (0.8 in)	1.2 mm (0.05 in)	56 years	20 of 100 (Routine)
25 November 2024	Rochester, AU	daily rain	23.4 mm (0.9 in)	0.5 mm (0.02 in)	59 years	20 of 100 (Routine)
11 May 2024	Rochester, AU	daily rain	23.0 mm (0.9 in)	0.1 mm (0.00 in)	104 years	20 of 100 (Routine)
8 January 2024	Rochester, AU	daily rain	36.0 mm (1.4 in)	23.8 mm (0.9 in)	97 years	62 of 100 (Major)
3 January 2024	Rochester, AU	daily rain	42.0 mm (1.7 in)	18.6 mm (0.7 in)	102 years	58 of 100 (Notable)
4 October 2023	Rochester, AU	daily rain	51.0 mm (2.0 in)	1.0 mm (0.04 in)	29 years	19 of 100 (Routine)
8 June 2023	Rochester, AU	monthly rain	58.8 mm (2.3 in)	2.4 mm (0.09 in)	112 years	54 of 100 (Notable)
16 April 2023	Rochester, AU	daily rain	27.0 mm (1.1 in)	5.4 mm (0.21 in)	53 years	33 of 100 (Routine)
14 October 2022	Rochester, AU	daily rain	30.0 mm (1.2 in)	9.6 mm (0.38 in)	0 years	23 of 100 (Routine)
13 October 2022	Rochester, AU	monthly rain	70.2 mm (2.8 in)	20.2 mm (0.8 in)	29 years	56 of 100 (Notable)
6 October 2022	Rochester, AU	daily rain	15.4 mm (0.6 in)	0.2 mm (0.01 in)	92 years	20 of 100 (Routine)
13 August 2022	Rochester, AU	daily rain	26.6 mm (1.0 in)	19.0 mm (0.7 in)	80 years	70 of 100 (Major)
19 April 2022	Rochester, AU	daily rain	47.6 mm (1.9 in)	26.2 mm (1.0 in)	48 years	60 of 100 (Major)
2 March 2022	Rochester, AU	daily rain	15.2 mm (0.6 in)	1.0 mm (0.04 in)	75 years	20 of 100 (Routine)
14 October 2021	Rochester, AU	daily rain	20.4 mm (0.8 in)	2.4 mm (0.09 in)	75 years	20 of 100 (Routine)

Climate Trend

10 complete years, 1965 to 1974

One stripe for each of 10 complete years at Rochester, 1965 to 1974. Blue stripes are years cooler than the station's own mean of 15.4 C (59.7 F); red stripes are warmer. The coolest year was 1970, at 14.9 C (58.9 F), and the warmest was 1972, at 15.9 C (60.6 F). The strongest colour marks a difference of 0.6 C (1.1 F).

Annual mean temperature at Rochester as warming stripes, 1965 to 1974
Year	Annual mean temperature	Difference from the station mean
1965	15.3 C	-0.07 C
1966	15.0 C	-0.44 C
1967	15.6 C	+0.15 C
1968	15.4 C	-0.01 C
1969	15.2 C	-0.22 C
1970	14.9 C	-0.48 C
1971	15.5 C	+0.12 C
1972	15.9 C	+0.50 C
1973	15.8 C	+0.36 C
1974	15.5 C	+0.05 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

1904 to 2026

Yearly extremes at Rochester: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	45.0 C (113.0 F)	1968	40.4 C (104.7 F)	11
Coldest night (TNn)	-2.8 C (27.0 F)	1965	-1.7 C (28.9 F)	11
Wettest day (Rx1day)	97.5 mm (3.8 in)	1973	35.0 mm (1.4 in)	122
Wettest five days (Rx5day)	170.0 mm (6.7 in)	1950	57.5 mm (2.3 in)	122
Longest dry spell (CDD)	72 days	1926	32 days	122

Hottest day (TXx)

The hottest day of the year at Rochester, 1904 to 2026. The record is 45.0 C (113.0 F) in 1968, marked on the chart; the median year is 40.4 C (104.7 F).

Hottest day (TXx) at Rochester by year
Year	Hottest day (TXx)
1904	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	42.2 C (108.0 F)
1966	39.0 C (102.2 F)
1967	40.0 C (104.0 F)
1968	45.0 C (113.0 F)
1969	41.1 C (106.0 F)
1970	40.0 C (104.0 F)
1971	41.7 C (107.1 F)
1972	40.4 C (104.7 F)
1973	43.0 C (109.4 F)
1974	36.5 C (97.7 F)
1975	39.1 C (102.4 F)
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
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
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Rochester, 1904 to 2026. The record is -2.8 C (27.0 F) in 1965, marked on the chart; the median year is -1.7 C (28.9 F).

Coldest night (TNn) at Rochester by year
Year	Coldest night (TNn)
1904	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	-2.8 C (27.0 F)
1966	-2.7 C (27.1 F)
1967	-1.6 C (29.1 F)
1968	-1.7 C (28.9 F)
1969	-1.7 C (28.9 F)
1970	-1.7 C (28.9 F)
1971	-1.7 C (28.9 F)
1972	-2.7 C (27.1 F)
1973	-0.6 C (30.9 F)
1974	-2.5 C (27.5 F)
1975	-1.2 C (29.8 F)
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
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
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Rochester, 1904 to 2026. The record is 97.5 mm (3.8 in) in 1973, marked on the chart; the median year is 35.0 mm (1.4 in).

Wettest day (Rx1day) at Rochester by year
Year	Wettest day (Rx1day)
1904	0.0 mm (0.00 in)
1906	18.5 mm (0.7 in)
1907	35.6 mm (1.4 in)
1908	27.2 mm (1.1 in)
1909	27.2 mm (1.1 in)
1910	56.4 mm (2.2 in)
1911	35.8 mm (1.4 in)
1912	34.3 mm (1.4 in)
1913	36.3 mm (1.4 in)
1914	26.2 mm (1.0 in)
1915	40.6 mm (1.6 in)
1916	45.2 mm (1.8 in)
1917	35.6 mm (1.4 in)
1918	39.1 mm (1.5 in)
1919	47.8 mm (1.9 in)
1920	36.1 mm (1.4 in)
1921	46.5 mm (1.8 in)
1922	29.7 mm (1.2 in)
1923	25.4 mm (1.0 in)
1924	43.2 mm (1.7 in)
1925	23.4 mm (0.9 in)
1926	54.6 mm (2.1 in)
1927	18.3 mm (0.7 in)
1928	53.1 mm (2.1 in)
1929	53.1 mm (2.1 in)
1930	57.9 mm (2.3 in)
1931	38.1 mm (1.5 in)
1932	25.4 mm (1.0 in)
1933	42.7 mm (1.7 in)
1934	25.4 mm (1.0 in)
1935	35.1 mm (1.4 in)
1936	45.5 mm (1.8 in)
1937	19.1 mm (0.8 in)
1938	21.6 mm (0.9 in)
1939	48.3 mm (1.9 in)
1940	29.5 mm (1.2 in)
1941	64.3 mm (2.5 in)
1942	34.3 mm (1.4 in)
1943	26.4 mm (1.0 in)
1944	18.3 mm (0.7 in)
1945	30.5 mm (1.2 in)
1946	28.7 mm (1.1 in)
1947	21.8 mm (0.9 in)
1948	31.5 mm (1.2 in)
1949	56.4 mm (2.2 in)
1950	82.6 mm (3.3 in)
1951	88.1 mm (3.5 in)
1952	26.2 mm (1.0 in)
1953	30.2 mm (1.2 in)
1954	49.5 mm (1.9 in)
1955	44.5 mm (1.8 in)
1956	33.8 mm (1.3 in)
1957	38.6 mm (1.5 in)
1958	45.2 mm (1.8 in)
1959	70.1 mm (2.8 in)
1960	27.2 mm (1.1 in)
1961	26.4 mm (1.0 in)
1962	36.8 mm (1.4 in)
1963	33.0 mm (1.3 in)
1964	38.1 mm (1.5 in)
1965	22.9 mm (0.9 in)
1966	27.9 mm (1.1 in)
1967	32.3 mm (1.3 in)
1968	39.6 mm (1.6 in)
1969	26.4 mm (1.0 in)
1970	32.5 mm (1.3 in)
1971	31.5 mm (1.2 in)
1972	82.8 mm (3.3 in)
1973	97.5 mm (3.8 in)
1974	49.0 mm (1.9 in)
1975	45.4 mm (1.8 in)
1976	12.8 mm (0.5 in)
1977	31.8 mm (1.3 in)
1978	34.4 mm (1.4 in)
1979	30.4 mm (1.2 in)
1980	34.8 mm (1.4 in)
1981	29.2 mm (1.1 in)
1982	13.4 mm (0.5 in)
1983	33.0 mm (1.3 in)
1984	53.6 mm (2.1 in)
1985	34.8 mm (1.4 in)
1986	27.0 mm (1.1 in)
1987	29.8 mm (1.2 in)
1988	59.6 mm (2.3 in)
1989	27.6 mm (1.1 in)
1990	22.0 mm (0.9 in)
1991	46.4 mm (1.8 in)
1992	42.0 mm (1.7 in)
1993	50.0 mm (2.0 in)
1994	21.4 mm (0.8 in)
1995	35.4 mm (1.4 in)
1996	22.0 mm (0.9 in)
1997	26.6 mm (1.0 in)
1998	78.0 mm (3.1 in)
1999	39.2 mm (1.5 in)
2000	45.6 mm (1.8 in)
2001	27.4 mm (1.1 in)
2002	18.0 mm (0.7 in)
2003	39.8 mm (1.6 in)
2004	59.0 mm (2.3 in)
2005	56.0 mm (2.2 in)
2006	16.8 mm (0.7 in)
2007	35.8 mm (1.4 in)
2008	47.5 mm (1.9 in)
2009	22.2 mm (0.9 in)
2010	44.0 mm (1.7 in)
2011	55.2 mm (2.2 in)
2012	75.0 mm (3.0 in)
2013	26.2 mm (1.0 in)
2014	68.1 mm (2.7 in)
2015	30.0 mm (1.2 in)
2016	32.6 mm (1.3 in)
2017	54.0 mm (2.1 in)
2018	19.2 mm (0.8 in)
2019	19.2 mm (0.8 in)
2020	59.0 mm (2.3 in)
2021	28.0 mm (1.1 in)
2022	70.2 mm (2.8 in)
2023	58.8 mm (2.3 in)
2024	42.0 mm (1.7 in)
2025	21.0 mm (0.8 in)
2026	73.6 mm (2.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Rochester, 1904 to 2026. The record is 170.0 mm (6.7 in) in 1950, marked on the chart; the median year is 57.5 mm (2.3 in).

Wettest five days (Rx5day) at Rochester by year
Year	Wettest five days (Rx5day)
1904	0.0 mm (0.00 in)
1906	29.3 mm (1.2 in)
1907	69.1 mm (2.7 in)
1908	36.0 mm (1.4 in)
1909	78.8 mm (3.1 in)
1910	94.8 mm (3.7 in)
1911	87.9 mm (3.5 in)
1912	58.5 mm (2.3 in)
1913	48.0 mm (1.9 in)
1914	30.3 mm (1.2 in)
1915	58.0 mm (2.3 in)
1916	75.6 mm (3.0 in)
1917	52.6 mm (2.1 in)
1918	63.5 mm (2.5 in)
1919	49.6 mm (2.0 in)
1920	64.3 mm (2.5 in)
1921	62.0 mm (2.4 in)
1922	39.8 mm (1.6 in)
1923	46.0 mm (1.8 in)
1924	65.0 mm (2.6 in)
1925	32.3 mm (1.3 in)
1926	60.2 mm (2.4 in)
1927	34.6 mm (1.4 in)
1928	123.2 mm (4.9 in)
1929	94.6 mm (3.7 in)
1930	103.0 mm (4.1 in)
1931	65.3 mm (2.6 in)
1932	43.7 mm (1.7 in)
1933	58.2 mm (2.3 in)
1934	53.1 mm (2.1 in)
1935	70.0 mm (2.8 in)
1936	83.3 mm (3.3 in)
1937	37.1 mm (1.5 in)
1938	36.8 mm (1.4 in)
1939	75.7 mm (3.0 in)
1940	31.0 mm (1.2 in)
1941	64.3 mm (2.5 in)
1942	36.1 mm (1.4 in)
1943	27.7 mm (1.1 in)
1944	18.8 mm (0.7 in)
1945	48.5 mm (1.9 in)
1946	54.9 mm (2.2 in)
1947	38.0 mm (1.5 in)
1948	71.7 mm (2.8 in)
1949	112.5 mm (4.4 in)
1950	170.0 mm (6.7 in)
1951	121.6 mm (4.8 in)
1952	38.2 mm (1.5 in)
1953	41.7 mm (1.6 in)
1954	113.2 mm (4.5 in)
1955	88.1 mm (3.5 in)
1956	61.5 mm (2.4 in)
1957	43.7 mm (1.7 in)
1958	67.6 mm (2.7 in)
1959	92.5 mm (3.6 in)
1960	48.1 mm (1.9 in)
1961	31.3 mm (1.2 in)
1962	47.8 mm (1.9 in)
1963	68.6 mm (2.7 in)
1964	57.4 mm (2.3 in)
1965	30.8 mm (1.2 in)
1966	39.7 mm (1.6 in)
1967	39.1 mm (1.5 in)
1968	51.1 mm (2.0 in)
1969	42.9 mm (1.7 in)
1970	72.4 mm (2.9 in)
1971	60.0 mm (2.4 in)
1972	120.2 mm (4.7 in)
1973	149.4 mm (5.9 in)
1974	108.2 mm (4.3 in)
1975	79.8 mm (3.1 in)
1976	22.0 mm (0.9 in)
1977	33.6 mm (1.3 in)
1978	38.2 mm (1.5 in)
1979	46.8 mm (1.8 in)
1980	64.6 mm (2.5 in)
1981	49.6 mm (2.0 in)
1982	25.4 mm (1.0 in)
1983	57.6 mm (2.3 in)
1984	72.6 mm (2.9 in)
1985	96.0 mm (3.8 in)
1986	44.0 mm (1.7 in)
1987	36.6 mm (1.4 in)
1988	66.6 mm (2.6 in)
1989	47.8 mm (1.9 in)
1990	29.0 mm (1.1 in)
1991	51.0 mm (2.0 in)
1992	77.8 mm (3.1 in)
1993	68.0 mm (2.7 in)
1994	33.2 mm (1.3 in)
1995	69.2 mm (2.7 in)
1996	31.8 mm (1.3 in)
1997	38.8 mm (1.5 in)
1998	95.8 mm (3.8 in)
1999	57.0 mm (2.2 in)
2000	65.6 mm (2.6 in)
2001	41.4 mm (1.6 in)
2002	18.0 mm (0.7 in)
2003	45.6 mm (1.8 in)
2004	84.9 mm (3.3 in)
2005	101.4 mm (4.0 in)
2006	37.4 mm (1.5 in)
2007	58.6 mm (2.3 in)
2008	58.7 mm (2.3 in)
2009	36.0 mm (1.4 in)
2010	59.4 mm (2.3 in)
2011	111.6 mm (4.4 in)
2012	169.6 mm (6.7 in)
2013	35.0 mm (1.4 in)
2014	68.1 mm (2.7 in)
2015	46.2 mm (1.8 in)
2016	46.6 mm (1.8 in)
2017	82.8 mm (3.3 in)
2018	26.8 mm (1.1 in)
2019	26.0 mm (1.0 in)
2020	61.0 mm (2.4 in)
2021	74.6 mm (2.9 in)
2022	100.2 mm (3.9 in)
2023	68.6 mm (2.7 in)
2024	42.0 mm (1.7 in)
2025	34.8 mm (1.4 in)
2026	88.8 mm (3.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Rochester, 1904 to 2026. The record is 72 days in 1926, marked on the chart; the median year is 32 days.

Longest dry spell (CDD) at Rochester by year
Year	Longest dry spell (CDD)
1904	60 days
1906	30 days
1907	31 days
1908	55 days
1909	49 days
1910	48 days
1911	31 days
1912	47 days
1913	42 days
1914	52 days
1915	31 days
1916	26 days
1917	27 days
1918	24 days
1919	33 days
1920	67 days
1921	41 days
1922	49 days
1923	53 days
1924	27 days
1925	50 days
1926	72 days
1927	36 days
1928	47 days
1929	31 days
1930	50 days
1931	30 days
1932	23 days
1933	32 days
1934	46 days
1935	27 days
1936	57 days
1937	28 days
1938	32 days
1939	25 days
1940	30 days
1941	28 days
1942	24 days
1943	31 days
1944	47 days
1945	37 days
1946	25 days
1947	23 days
1948	47 days
1949	30 days
1950	38 days
1951	20 days
1952	54 days
1953	56 days
1954	34 days
1955	28 days
1956	22 days
1957	42 days
1958	27 days
1959	25 days
1960	28 days
1961	38 days
1962	34 days
1963	29 days
1964	31 days
1965	39 days
1966	24 days
1967	42 days
1968	55 days
1969	22 days
1970	34 days
1971	28 days
1972	38 days
1973	15 days
1974	21 days
1975	33 days
1976	30 days
1977	35 days
1978	29 days
1979	32 days
1980	40 days
1981	27 days
1982	27 days
1983	61 days
1984	38 days
1985	27 days
1986	55 days
1987	27 days
1988	32 days
1989	26 days
1990	23 days
1991	56 days
1992	33 days
1993	22 days
1994	22 days
1995	29 days
1996	20 days
1997	40 days
1998	34 days
1999	38 days
2000	34 days
2001	31 days
2002	26 days
2003	38 days
2004	35 days
2005	38 days
2006	43 days
2007	31 days
2008	49 days
2009	62 days
2010	19 days
2011	21 days
2012	33 days
2013	38 days
2014	22 days
2015	45 days
2016	38 days
2017	24 days
2018	33 days
2019	38 days
2020	23 days
2021	36 days
2022	24 days
2023	24 days
2024	25 days
2025	46 days
2026	30 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

115 years, 1907 to 2025

A day with at least 35.8 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 97.4 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Rochester: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	35.8 mm (1.4 in)
5 years	50.5 mm (2.0 in)
10 years	60.9 mm (2.4 in)
25 years	74.9 mm (2.9 in)
50 years	85.9 mm (3.4 in)
100 years	97.4 mm (3.8 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 115 years of values from 1907 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: 97.5 mm (3.8 in) in 1973; 88.1 mm (3.5 in) in 1951; 82.8 mm (3.3 in) in 1972.

Download the Data

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