Riverview Observatory Weather Records (ASN00066131)

Record envelope, standing records and threshold days for Riverview Observatory (ASN00066131), Australia, with 111 years of record.

Key Facts for Riverview Observatory

Riverview Observatory (ASN00066131) is a weather station in Australia at -33.83 latitude and 151.16 longitude, 40 m (131 ft) above sea level.
The station reports from 1905 to 2015, 111 years of record.
1,464 records set at Riverview Observatory still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Riverview Observatory set a daily record precipitation of 75.6 mm (3.0 in) on 15 October 2014.

About the Station

Location: Australia, -33.83 latitude, 151.16 longitude.
Elevation: 40 m (131 ft).
Period of record: 1905 to 2015, 111 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 Riverview Observatory. 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 Riverview Observatory, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	45.4 C (113.7 F)	11.3 C (52.3 F)	n/a	n/a
Feb	41.3 C (106.3 F)	11.1 C (52.0 F)	n/a	n/a
Mar	40.2 C (104.4 F)	7.4 C (45.3 F)	n/a	n/a
Apr	32.7 C (90.9 F)	5.7 C (42.3 F)	n/a	n/a
May	28.5 C (83.3 F)	3.4 C (38.1 F)	n/a	n/a
Jun	24.9 C (76.8 F)	1.2 C (34.2 F)	n/a	n/a
Jul	24.5 C (76.1 F)	-1.7 C (28.9 F)	n/a	n/a
Aug	30.2 C (86.4 F)	1.4 C (34.5 F)	n/a	n/a
Sep	34.8 C (94.6 F)	1.7 C (35.1 F)	n/a	n/a
Oct	38.0 C (100.4 F)	5.6 C (42.1 F)	n/a	n/a
Nov	40.5 C (104.9 F)	6.9 C (44.4 F)	n/a	n/a
Dec	43.5 C (110.3 F)	8.3 C (46.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Riverview Observatory still stand. 1965 holds the most, with 83.

Standing records at Riverview Observatory by the year they were set
Year set	Standing records
1962	20
1963	11
1964	71
1965	83
1966	67
1967	62
1968	57
1969	66
1970	68
1971	50
1972	6
1993	6
1994	49
1995	72
1996	57
1997	50
1998	63
1999	35
2000	42
2001	33
2002	32
2003	35
2004	42
2005	40
2006	46
2007	38
2008	47
2009	44
2010	30
2011	51
2012	31
2013	29
2014	30
2015	1

All-Time Record Progression

1 new records

1 all-time records were set at Riverview Observatory between 28 March 1942 and 28 March 1942. Each dot is a new record.

Wettest Day of Each Month

Mar: 289.8 mm (11.4 in)

The wettest day on record for each calendar month at Riverview Observatory. The most was 289.8 mm (11.4 in) on 28 March 1942.

Record daily precipitation for each month at Riverview Observatory
Month	Record daily precipitation (mm)	Date
Jan	210.6 mm (8.3 in)	13 January 1911
Feb	195.6 mm (7.7 in)	10 February 1956
Mar	289.8 mm (11.4 in)	28 March 1942
Apr	141.6 mm (5.6 in)	11 April 1998
May	161.5 mm (6.4 in)	1 May 1955
Jun	128.0 mm (5.0 in)	15 June 1952
Jul	192.8 mm (7.6 in)	7 July 1931
Aug	134.9 mm (5.3 in)	30 August 1963
Sep	114.8 mm (4.5 in)	2 September 1970
Oct	111.3 mm (4.4 in)	22 October 1960
Nov	196.6 mm (7.7 in)	19 November 1961
Dec	105.9 mm (4.2 in)	13 December 1910

Period of Record Coverage

1962 to 2015

34 years of record at Riverview Observatory, 1962 to 2015. 14 years have data for under 90 percent of days and are left out of rankings: 1962, 1963, 1972, 1993, 2006, 2007, 2008, 2009 and others.

Days with data per year at Riverview Observatory
Year	Days with data	Share of year	Complete
1962	161	44%	No
1963	68	19%	No
1964	366	100%	Yes
1965	364	100%	Yes
1966	365	100%	Yes
1967	362	99%	Yes
1968	336	92%	Yes
1969	365	100%	Yes
1970	334	92%	Yes
1971	365	100%	Yes
1972	60	16%	No
1993	61	17%	No
1994	365	100%	Yes
1995	365	100%	Yes
1996	361	99%	Yes
1997	359	98%	Yes
1998	358	98%	Yes
1999	354	97%	Yes
2000	348	95%	Yes
2001	361	99%	Yes
2002	347	95%	Yes
2003	331	91%	Yes
2004	344	94%	Yes
2005	347	95%	Yes
2006	325	89%	No
2007	318	87%	No
2008	286	78%	No
2009	276	76%	No
2010	302	83%	No
2011	328	90%	No
2012	286	78%	No
2013	232	64%	No
2014	229	63%	No
2015	4	1%	No

Latest Records

Latest records at Riverview Observatory
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 October 2014	Riverview Observatory, AU	daily rain	75.6 mm (3.0 in)	34.2 mm (1.3 in)	68 years	60 of 100 (Major)
19 August 2014	Riverview Observatory, AU	daily rain	57.6 mm (2.3 in)	33.2 mm (1.3 in)	108 years	66 of 100 (Major)
17 September 2013	Riverview Observatory, AU	daily rain	32.6 mm (1.3 in)	6.9 mm (0.27 in)	72 years	38 of 100 (Notable)
24 May 2013	Riverview Observatory, AU	daily rain	40.0 mm (1.6 in)	0.6 mm (0.02 in)	70 years	31 of 100 (Routine)
23 May 2013	Riverview Observatory, AU	daily rain (Tie)	23.8 mm (0.9 in)	tie	4 years	2 of 100 (Routine)
21 April 2013	Riverview Observatory, AU	daily rain	42.8 mm (1.7 in)	3.8 mm (0.15 in)	39 years	23 of 100 (Routine)
29 January 2013	Riverview Observatory, AU	daily rain	105.6 mm (4.2 in)	36.0 mm (1.4 in)	35 years	43 of 100 (Notable)
18 April 2012	Riverview Observatory, AU	daily rain	83.2 mm (3.3 in)	25.0 mm (1.0 in)	86 years	52 of 100 (Notable)
8 March 2012	Riverview Observatory, AU	daily rain	85.2 mm (3.4 in)	2.1 mm (0.08 in)	76 years	33 of 100 (Routine)
3 February 2012	Riverview Observatory, AU	daily rain	53.2 mm (2.1 in)	6.0 mm (0.24 in)	56 years	30 of 100 (Routine)
9 January 2012	Riverview Observatory, AU	daily rain	42.8 mm (1.7 in)	16.6 mm (0.7 in)	62 years	38 of 100 (Notable)
23 November 2011	Riverview Observatory, AU	daily rain	43.1 mm (1.7 in)	25.3 mm (1.0 in)	64 years	49 of 100 (Notable)
23 July 2011	Riverview Observatory, AU	daily rain	47.2 mm (1.9 in)	7.8 mm (0.31 in)	92 years	42 of 100 (Notable)
22 July 2011	Riverview Observatory, AU	daily rain	106.8 mm (4.2 in)	70.0 mm (2.8 in)	92 years	77 of 100 (Major)
20 July 2011	Riverview Observatory, AU	daily rain	73.5 mm (2.9 in)	32.4 mm (1.3 in)	100 years	62 of 100 (Major)
15 September 2010	Riverview Observatory, AU	daily rain	54.8 mm (2.2 in)	34.7 mm (1.4 in)	88 years	72 of 100 (Major)
4 June 2010	Riverview Observatory, AU	daily rain	45.0 mm (1.8 in)	19.9 mm (0.8 in)	68 years	44 of 100 (Notable)
27 May 2010	Riverview Observatory, AU	daily rain	41.2 mm (1.6 in)	11.0 mm (0.4 in)	55 years	33 of 100 (Routine)
13 February 2010	Riverview Observatory, AU	daily rain	61.4 mm (2.4 in)	19.8 mm (0.8 in)	12 years	26 of 100 (Routine)
26 October 2009	Riverview Observatory, AU	daily rain	76.4 mm (3.0 in)	41.3 mm (1.6 in)	70 years	67 of 100 (Major)

Climate Trend

20 complete years, 1964 to 2011

One stripe for each of 20 complete years at Riverview Observatory, 1964 to 2011. 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 1966, at 17.0 C (62.6 F), and the warmest was 2005, at 18.3 C (65.0 F). The strongest colour marks a difference of 0.8 C (1.4 F).

Annual mean temperature at Riverview Observatory as warming stripes, 1964 to 2011
Year	Annual mean temperature	Difference from the station mean
1964	17.7 C	+0.00 C
1965	17.4 C	-0.36 C
1966	17.0 C	-0.72 C
1967	17.3 C	-0.45 C
1969	17.7 C	-0.04 C
1971	17.4 C	-0.36 C
1994	17.6 C	-0.10 C
1995	17.2 C	-0.56 C
1996	17.4 C	-0.29 C
1997	17.8 C	+0.06 C
1998	18.2 C	+0.50 C
1999	17.7 C	-0.07 C
2000	17.9 C	+0.14 C
2001	18.0 C	+0.24 C
2002	18.0 C	+0.27 C
2003	17.8 C	+0.06 C
2004	18.2 C	+0.51 C
2005	18.3 C	+0.60 C
2006	18.2 C	+0.47 C
2011	17.8 C	+0.09 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

1905 to 2015

Yearly extremes at Riverview Observatory: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	45.4 C (113.7 F)	2013	38.2 C (100.8 F)	34
Coldest night (TNn)	-1.7 C (28.9 F)	1968	2.9 C (37.2 F)	34
Wettest day (Rx1day)	289.8 mm (11.4 in)	1942	86.8 mm (3.4 in)	97
Wettest five days (Rx5day)	435.5 mm (17.1 in)	1961	168.4 mm (6.6 in)	97
Longest dry spell (CDD)	57 days	1995	24 days	97

Hottest day (TXx)

The hottest day of the year at Riverview Observatory, 1905 to 2015. The record is 45.4 C (113.7 F) in 2013, marked on the chart; the median year is 38.2 C (100.8 F).

Hottest day (TXx) at Riverview Observatory by year
Year	Hottest day (TXx)
1905	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	34.4 C (93.9 F)
1963	36.6 C (97.9 F)
1964	40.6 C (105.1 F)
1965	40.2 C (104.4 F)
1966	38.0 C (100.4 F)
1967	39.7 C (103.5 F)
1968	38.7 C (101.7 F)
1969	40.2 C (104.4 F)
1970	37.4 C (99.3 F)
1971	36.1 C (97.0 F)
1972	32.4 C (90.3 F)
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1993	35.7 C (96.3 F)
1994	43.5 C (110.3 F)
1995	37.7 C (99.9 F)
1996	34.8 C (94.6 F)
1997	38.1 C (100.6 F)
1998	39.2 C (102.6 F)
1999	35.2 C (95.4 F)
2000	38.3 C (100.9 F)
2001	36.1 C (97.0 F)
2002	40.5 C (104.9 F)
2003	44.0 C (111.2 F)
2004	40.7 C (105.3 F)
2005	38.9 C (102.0 F)
2006	44.0 C (111.2 F)
2007	34.5 C (94.1 F)
2008	33.6 C (92.5 F)
2009	41.8 C (107.2 F)
2010	37.5 C (99.5 F)
2011	41.3 C (106.3 F)
2012	33.5 C (92.3 F)
2013	45.4 C (113.7 F)
2014	39.7 C (103.5 F)
2015	32.4 C (90.3 F)

Coldest night (TNn)

The coldest night of the year at Riverview Observatory, 1905 to 2015. The record is -1.7 C (28.9 F) in 1968, marked on the chart; the median year is 2.9 C (37.2 F).

Coldest night (TNn) at Riverview Observatory by year
Year	Coldest night (TNn)
1905	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	1.7 C (35.1 F)
1963	2.9 C (37.2 F)
1964	1.4 C (34.5 F)
1965	1.2 C (34.2 F)
1966	1.4 C (34.5 F)
1967	1.7 C (35.1 F)
1968	-1.7 C (28.9 F)
1969	2.0 C (35.6 F)
1970	-0.9 C (30.4 F)
1971	0.7 C (33.3 F)
1972	11.1 C (52.0 F)
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1993	8.9 C (48.0 F)
1994	3.8 C (38.8 F)
1995	1.4 C (34.5 F)
1996	3.0 C (37.4 F)
1997	3.8 C (38.8 F)
1998	3.7 C (38.7 F)
1999	3.3 C (37.9 F)
2000	3.3 C (37.9 F)
2001	3.9 C (39.0 F)
2002	1.8 C (35.2 F)
2003	2.5 C (36.5 F)
2004	3.5 C (38.3 F)
2005	2.9 C (37.2 F)
2006	3.8 C (38.8 F)
2007	0.6 C (33.1 F)
2008	3.0 C (37.4 F)
2009	3.5 C (38.3 F)
2010	1.2 C (34.2 F)
2011	2.9 C (37.2 F)
2012	3.0 C (37.4 F)
2013	2.6 C (36.7 F)
2014	3.4 C (38.1 F)
2015	20.0 C (68.0 F)

Wettest day (Rx1day)

The wettest day of the year at Riverview Observatory, 1905 to 2015. The record is 289.8 mm (11.4 in) in 1942, marked on the chart; the median year is 86.8 mm (3.4 in).

Wettest day (Rx1day) at Riverview Observatory by year
Year	Wettest day (Rx1day)
1905	72.1 mm (2.8 in)
1906	99.1 mm (3.9 in)
1907	78.7 mm (3.1 in)
1908	140.2 mm (5.5 in)
1909	59.4 mm (2.3 in)
1910	105.9 mm (4.2 in)
1911	210.6 mm (8.3 in)
1912	85.6 mm (3.4 in)
1913	149.9 mm (5.9 in)
1914	95.5 mm (3.8 in)
1915	65.0 mm (2.6 in)
1916	88.6 mm (3.5 in)
1917	79.0 mm (3.1 in)
1918	128.0 mm (5.0 in)
1919	59.2 mm (2.3 in)
1920	82.8 mm (3.3 in)
1921	95.0 mm (3.7 in)
1922	96.3 mm (3.8 in)
1923	69.6 mm (2.7 in)
1924	50.0 mm (2.0 in)
1925	88.4 mm (3.5 in)
1926	103.4 mm (4.1 in)
1927	113.3 mm (4.5 in)
1928	55.1 mm (2.2 in)
1929	61.7 mm (2.4 in)
1930	70.9 mm (2.8 in)
1931	192.8 mm (7.6 in)
1932	52.6 mm (2.1 in)
1933	97.3 mm (3.8 in)
1934	78.5 mm (3.1 in)
1935	73.7 mm (2.9 in)
1936	83.1 mm (3.3 in)
1937	79.2 mm (3.1 in)
1938	117.9 mm (4.6 in)
1939	50.0 mm (2.0 in)
1940	79.5 mm (3.1 in)
1941	36.3 mm (1.4 in)
1942	289.8 mm (11.4 in)
1943	75.7 mm (3.0 in)
1944	56.1 mm (2.2 in)
1945	61.0 mm (2.4 in)
1946	114.6 mm (4.5 in)
1947	63.2 mm (2.5 in)
1948	78.5 mm (3.1 in)
1949	154.9 mm (6.1 in)
1950	118.4 mm (4.7 in)
1951	98.6 mm (3.9 in)
1952	153.9 mm (6.1 in)
1953	133.1 mm (5.2 in)
1954	134.9 mm (5.3 in)
1955	161.5 mm (6.4 in)
1956	195.6 mm (7.7 in)
1957	57.2 mm (2.3 in)
1958	151.1 mm (5.9 in)
1959	138.4 mm (5.4 in)
1960	111.3 mm (4.4 in)
1961	196.6 mm (7.7 in)
1962	129.3 mm (5.1 in)
1963	134.9 mm (5.3 in)
1964	99.1 mm (3.9 in)
1965	86.4 mm (3.4 in)
1966	102.6 mm (4.0 in)
1967	90.9 mm (3.6 in)
1968	57.4 mm (2.3 in)
1969	134.6 mm (5.3 in)
1970	114.8 mm (4.5 in)
1971	81.8 mm (3.2 in)
1972	102.1 mm (4.0 in)
1973	65.3 mm (2.6 in)
1974	82.0 mm (3.2 in)
1975	110.2 mm (4.3 in)
1976	81.6 mm (3.2 in)
1977	115.4 mm (4.5 in)
1978	107.4 mm (4.2 in)
1993	22.2 mm (0.9 in)
1994	60.6 mm (2.4 in)
1995	86.8 mm (3.4 in)
1996	116.6 mm (4.6 in)
1997	77.8 mm (3.1 in)
1998	141.6 mm (5.6 in)
1999	100.0 mm (3.9 in)
2000	53.8 mm (2.1 in)
2001	78.8 mm (3.1 in)
2002	64.4 mm (2.5 in)
2003	79.0 mm (3.1 in)
2004	81.2 mm (3.2 in)
2005	70.0 mm (2.8 in)
2006	102.6 mm (4.0 in)
2007	126.0 mm (5.0 in)
2008	63.4 mm (2.5 in)
2009	76.4 mm (3.0 in)
2010	61.4 mm (2.4 in)
2011	106.8 mm (4.2 in)
2012	85.2 mm (3.4 in)
2013	105.6 mm (4.2 in)
2014	75.6 mm (3.0 in)
2015	36.0 mm (1.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Riverview Observatory, 1905 to 2015. The record is 435.5 mm (17.1 in) in 1961, marked on the chart; the median year is 168.4 mm (6.6 in).

Wettest five days (Rx5day) at Riverview Observatory by year
Year	Wettest five days (Rx5day)
1905	155.7 mm (6.1 in)
1906	108.8 mm (4.3 in)
1907	146.4 mm (5.8 in)
1908	225.8 mm (8.9 in)
1909	126.5 mm (5.0 in)
1910	193.8 mm (7.6 in)
1911	282.8 mm (11.1 in)
1912	135.4 mm (5.3 in)
1913	192.8 mm (7.6 in)
1914	242.5 mm (9.5 in)
1915	161.3 mm (6.4 in)
1916	223.7 mm (8.8 in)
1917	137.5 mm (5.4 in)
1918	185.9 mm (7.3 in)
1919	166.9 mm (6.6 in)
1920	290.0 mm (11.4 in)
1921	134.1 mm (5.3 in)
1922	182.6 mm (7.2 in)
1923	112.3 mm (4.4 in)
1924	120.6 mm (4.7 in)
1925	157.7 mm (6.2 in)
1926	188.6 mm (7.4 in)
1927	342.7 mm (13.5 in)
1928	130.4 mm (5.1 in)
1929	175.2 mm (6.9 in)
1930	90.7 mm (3.6 in)
1931	287.0 mm (11.3 in)
1932	79.6 mm (3.1 in)
1933	162.4 mm (6.4 in)
1934	164.3 mm (6.5 in)
1935	102.1 mm (4.0 in)
1936	106.6 mm (4.2 in)
1937	160.5 mm (6.3 in)
1938	190.9 mm (7.5 in)
1939	124.4 mm (4.9 in)
1940	134.3 mm (5.3 in)
1941	69.1 mm (2.7 in)
1942	422.2 mm (16.6 in)
1943	168.6 mm (6.6 in)
1944	115.8 mm (4.6 in)
1945	170.2 mm (6.7 in)
1946	232.7 mm (9.2 in)
1947	114.1 mm (4.5 in)
1948	138.2 mm (5.4 in)
1949	302.8 mm (11.9 in)
1950	282.5 mm (11.1 in)
1951	238.1 mm (9.4 in)
1952	248.2 mm (9.8 in)
1953	211.1 mm (8.3 in)
1954	174.2 mm (6.9 in)
1955	208.5 mm (8.2 in)
1956	320.1 mm (12.6 in)
1957	110.0 mm (4.3 in)
1958	311.7 mm (12.3 in)
1959	192.1 mm (7.6 in)
1960	202.5 mm (8.0 in)
1961	435.5 mm (17.1 in)
1962	269.8 mm (10.6 in)
1963	188.0 mm (7.4 in)
1964	305.9 mm (12.0 in)
1965	164.7 mm (6.5 in)
1966	170.5 mm (6.7 in)
1967	168.4 mm (6.6 in)
1968	104.4 mm (4.1 in)
1969	206.0 mm (8.1 in)
1970	154.9 mm (6.1 in)
1971	107.0 mm (4.2 in)
1972	194.3 mm (7.6 in)
1973	105.4 mm (4.1 in)
1974	144.6 mm (5.7 in)
1975	214.4 mm (8.4 in)
1976	218.0 mm (8.6 in)
1977	204.6 mm (8.1 in)
1978	243.4 mm (9.6 in)
1993	46.8 mm (1.8 in)
1994	94.6 mm (3.7 in)
1995	144.0 mm (5.7 in)
1996	156.3 mm (6.2 in)
1997	176.5 mm (6.9 in)
1998	242.0 mm (9.5 in)
1999	166.8 mm (6.6 in)
2000	130.0 mm (5.1 in)
2001	173.0 mm (6.8 in)
2002	151.0 mm (5.9 in)
2003	212.8 mm (8.4 in)
2004	170.8 mm (6.7 in)
2005	126.2 mm (5.0 in)
2006	199.0 mm (7.8 in)
2007	215.4 mm (8.5 in)
2008	96.2 mm (3.8 in)
2009	101.2 mm (4.0 in)
2010	115.2 mm (4.5 in)
2011	249.9 mm (9.8 in)
2012	161.2 mm (6.3 in)
2013	114.0 mm (4.5 in)
2014	87.6 mm (3.4 in)
2015	36.0 mm (1.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Riverview Observatory, 1905 to 2015. The record is 57 days in 1995, marked on the chart; the median year is 24 days.

Longest dry spell (CDD) at Riverview Observatory by year
Year	Longest dry spell (CDD)
1905	20 days
1906	25 days
1907	24 days
1908	21 days
1909	22 days
1910	31 days
1911	25 days
1912	21 days
1913	29 days
1914	18 days
1915	42 days
1916	19 days
1917	33 days
1918	41 days
1919	20 days
1920	29 days
1921	23 days
1922	25 days
1923	25 days
1924	16 days
1925	26 days
1926	19 days
1927	30 days
1928	21 days
1929	27 days
1930	31 days
1931	17 days
1932	20 days
1933	18 days
1934	15 days
1935	31 days
1936	20 days
1937	15 days
1938	26 days
1939	29 days
1940	29 days
1941	22 days
1942	25 days
1943	23 days
1944	20 days
1945	18 days
1946	44 days
1947	24 days
1948	29 days
1949	21 days
1950	14 days
1951	27 days
1952	25 days
1953	24 days
1954	29 days
1955	18 days
1956	21 days
1957	42 days
1958	22 days
1959	14 days
1960	18 days
1961	24 days
1962	34 days
1963	13 days
1964	25 days
1965	25 days
1966	19 days
1967	18 days
1968	31 days
1969	23 days
1970	35 days
1971	36 days
1972	33 days
1973	40 days
1974	35 days
1975	41 days
1976	22 days
1977	28 days
1978	23 days
1993	11 days
1994	24 days
1995	57 days
1996	18 days
1997	17 days
1998	13 days
1999	16 days
2000	22 days
2001	24 days
2002	39 days
2003	20 days
2004	33 days
2005	29 days
2006	27 days
2007	22 days
2008	14 days
2009	15 days
2010	15 days
2011	23 days
2012	29 days
2013	35 days
2014	20 days
2015	11 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

90 years, 1905 to 2012

A day with at least 90.3 mm (3.6 in) of rain is expected about once in 2 years. A day with at least 248.2 mm (9.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Riverview Observatory: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	90.3 mm (3.6 in)
5 years	125.2 mm (4.9 in)
10 years	151.0 mm (5.9 in)
25 years	187.0 mm (7.4 in)
50 years	216.4 mm (8.5 in)
100 years	248.2 mm (9.8 in)	Longer than the 90 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, 90 years of values from 1905 to 2012.

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: 289.8 mm (11.4 in) in 1942; 210.6 mm (8.3 in) in 1911; 196.6 mm (7.7 in) in 1961.

Download the Data

Data for Riverview Observatory standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Riverview Observatory 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 2026-10-14. Last revised 14 October 2026 (2026-10-14).