Isilkul Weather Records (RSM00028688)

Record envelope, standing records and threshold days for Isilkul (RSM00028688), Russia, with 83 years of record.

Key Facts for Isilkul

Isilkul (RSM00028688) is a weather station in Russia at 54.90 latitude and 71.25 longitude, 128 m (420 ft) above sea level.
The station reports from 1936 to 2018, 83 years of record.
1,464 records set at Isilkul still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Isilkul set a daily record precipitation of 12.4 mm (0.5 in) on 13 April 2018.

About the Station

Location: Russia, 54.90 latitude, 71.25 longitude.
Elevation: 128 m (420 ft).
Period of record: 1936 to 2018, 83 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 Isilkul. 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 Isilkul, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	5.1 C (41.2 F)	-46.0 C (-50.8 F)	n/a	n/a
Feb	4.2 C (39.6 F)	-42.2 C (-44.0 F)	n/a	n/a
Mar	13.8 C (56.8 F)	-40.0 C (-40.0 F)	n/a	n/a
Apr	30.1 C (86.2 F)	-25.0 C (-13.0 F)	n/a	n/a
May	36.7 C (98.1 F)	-7.8 C (18.0 F)	n/a	n/a
Jun	38.0 C (100.4 F)	-2.8 C (27.0 F)	n/a	n/a
Jul	38.5 C (101.3 F)	-1.8 C (28.8 F)	n/a	n/a
Aug	36.7 C (98.1 F)	-1.3 C (29.7 F)	n/a	n/a
Sep	33.5 C (92.3 F)	-9.0 C (15.8 F)	n/a	n/a
Oct	23.5 C (74.3 F)	-21.0 C (-5.8 F)	n/a	n/a
Nov	11.4 C (52.5 F)	-38.1 C (-36.6 F)	n/a	n/a
Dec	2.8 C (37.0 F)	-44.0 C (-47.2 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Isilkul still stand. 1969 holds the most, with 64.

Standing records at Isilkul by the year they were set
Year set	Standing records
1948	3
1949	6
1950	9
1951	14
1952	11
1953	8
1954	14
1955	11
1956	3
1957	2
1958	4
1960	2
1962	3
1969	64
1970	29
1971	26
1973	25
1974	30
1975	44
1976	42
1977	29
1978	27
1979	41
1980	27
1981	12
1982	32
1983	18
1984	31
1985	12
1986	15
1987	23
1988	15
1989	18
1990	20
1991	34
1992	25
1993	19
1994	29
1995	37
1996	21
1997	25
1998	43
1999	54
2000	19
2001	35
2002	52
2003	26
2004	33
2005	14
2006	42
2007	23
2008	48
2009	23
2010	41
2011	22
2012	39
2013	17
2014	19
2015	23
2016	21
2017	10

All-Time Record Progression

1 new records

1 all-time records were set at Isilkul between 19 July 2012 and 19 July 2012. Each dot is a new record.

Wettest Day of Each Month

Sep: 68.1 mm (2.7 in)

The wettest day on record for each calendar month at Isilkul. The most was 68.1 mm (2.7 in) on 9 September 1951.

Record daily precipitation for each month at Isilkul
Month	Record daily precipitation (mm)	Date
Jan	11.2 mm (0.4 in)	14 January 2001
Feb	14.9 mm (0.6 in)	5 February 1969
Mar	15.6 mm (0.6 in)	25 March 1989
Apr	23.3 mm (0.9 in)	24 April 1979
May	32.6 mm (1.3 in)	14 May 1937
Jun	48.5 mm (1.9 in)	9 June 1956
Jul	63.0 mm (2.5 in)	27 July 1963
Aug	63.5 mm (2.5 in)	14 August 1976
Sep	68.1 mm (2.7 in)	9 September 1951
Oct	50.0 mm (2.0 in)	16 October 1981
Nov	20.1 mm (0.8 in)	19 November 1983
Dec	10.9 mm (0.4 in)	1 December 1989

Period of Record Coverage

1948 to 2018

64 years of record at Isilkul, 1948 to 2018. 58 years have data for under 90 percent of days and are left out of rankings: 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955 and others.

Days with data per year at Isilkul
Year	Days with data	Share of year	Complete
1948	62	17%	No
1949	109	30%	No
1950	158	43%	No
1951	112	31%	No
1952	64	17%	No
1953	115	32%	No
1954	139	38%	No
1955	81	22%	No
1956	19	5%	No
1957	41	11%	No
1958	35	10%	No
1960	10	3%	No
1961	32	9%	No
1962	8	2%	No
1963	1	0%	No
1969	339	93%	Yes
1970	328	90%	No
1971	166	45%	No
1973	287	79%	No
1974	303	83%	No
1975	310	85%	No
1976	316	86%	No
1977	296	81%	No
1978	307	84%	No
1979	295	81%	No
1980	312	85%	No
1981	300	82%	No
1982	277	76%	No
1983	300	82%	No
1984	268	73%	No
1985	321	88%	No
1986	314	86%	No
1987	301	82%	No
1988	313	86%	No
1989	307	84%	No
1990	297	81%	No
1991	286	78%	No
1992	263	72%	No
1993	310	85%	No
1994	309	85%	No
1995	288	79%	No
1996	297	81%	No
1997	305	84%	No
1998	216	59%	No
1999	311	85%	No
2000	316	86%	No
2001	298	82%	No
2002	298	82%	No
2003	295	81%	No
2004	301	82%	No
2005	329	90%	Yes
2006	311	85%	No
2007	316	87%	No
2008	335	92%	Yes
2009	325	89%	No
2010	329	90%	Yes
2011	336	92%	Yes
2012	342	93%	Yes
2013	104	28%	No
2014	1	0%	No
2015	252	69%	No
2016	128	35%	No
2017	137	38%	No
2018	81	22%	No

Latest Records

Latest records at Isilkul
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
13 April 2018	Isilkul, RU	daily rain	12.4 mm (0.5 in)	4.1 mm (0.16 in)	45 years	20 of 100 (Routine)
23 March 2018	Isilkul, RU	daily rain	4.8 mm (0.19 in)	2.0 mm (0.08 in)	59 years	20 of 100 (Routine)
21 March 2018	Isilkul, RU	daily rain	5.1 mm (0.20 in)	1.2 mm (0.05 in)	73 years	20 of 100 (Routine)
29 December 2017	Isilkul, RU	daily high max	1.4 C (34.5 F)	1.1 C (2.0 F)	6 years	9 of 100 (Routine)
20 November 2017	Isilkul, RU	daily high min	-2.0 C (28.4 F)	0.2 C (0.4 F)	27 years	15 of 100 (Routine)
17 November 2017	Isilkul, RU	daily high min	0.2 C (32.4 F)	0.2 C (0.4 F)	7 years	9 of 100 (Routine)
6 October 2017	Isilkul, RU	daily low min	-6.4 C (20.5 F)	2.5 C (4.5 F)	56 years	28 of 100 (Routine)
28 March 2017	Isilkul, RU	daily high min	0.8 C (33.4 F)	0.8 C (1.4 F)	66 years	27 of 100 (Routine)
28 March 2017	Isilkul, RU	daily rain	7.1 mm (0.28 in)	0.5 mm (0.02 in)	47 years	20 of 100 (Routine)
23 February 2017	Isilkul, RU	daily high max	-2.0 C (28.4 F)	0.8 C (1.4 F)	30 years	17 of 100 (Routine)
21 February 2017	Isilkul, RU	daily high max	0.1 C (32.2 F)	3.2 C (5.8 F)	33 years	20 of 100 (Routine)
21 February 2017	Isilkul, RU	daily high min	-7.9 C (17.8 F)	2.8 C (5.0 F)	25 years	17 of 100 (Routine)
5 January 2017	Isilkul, RU	daily high max	-2.5 C (27.5 F)	2.2 C (4.0 F)	10 years	12 of 100 (Routine)
4 January 2017	Isilkul, RU	daily high min	-5.3 C (22.5 F)	2.9 C (5.2 F)	10 years	13 of 100 (Routine)
31 December 2016	Isilkul, RU	daily high min (Tie)	-8.3 C (17.1 F)	tie	22 years	3 of 100 (Routine)
21 December 2016	Isilkul, RU	daily low min	-38.7 C (-37.7 F)	2.1 C (3.8 F)	6 years	9 of 100 (Routine)
12 December 2016	Isilkul, RU	daily rain	6.1 mm (0.24 in)	1.1 mm (0.04 in)	34 years	20 of 100 (Routine)
29 November 2016	Isilkul, RU	daily high max	1.8 C (35.2 F)	0.4 C (0.7 F)	7 years	8 of 100 (Routine)
19 November 2016	Isilkul, RU	daily low max	-25.4 C (-13.7 F)	4.7 C (8.5 F)	32 years	21 of 100 (Routine)
19 November 2016	Isilkul, RU	daily low min	-34.2 C (-29.6 F)	2.8 C (5.0 F)	32 years	18 of 100 (Routine)

Extremes by Year

1936 to 2018

Yearly extremes at Isilkul: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.5 C (101.3 F)	2012	33.8 C (92.9 F)	64
Coldest night (TNn)	-46.0 C (-50.8 F)	1979	-36.8 C (-34.2 F)	62
Wettest day (Rx1day)	68.1 mm (2.7 in)	1951	24.7 mm (1.0 in)	77
Wettest five days (Rx5day)	111.1 mm (4.4 in)	1942	41.6 mm (1.6 in)	70
Longest dry spell (CDD)	58 days	1950	29 days	76

Hottest day (TXx)

The hottest day of the year at Isilkul, 1936 to 2018. The record is 38.5 C (101.3 F) in 2012, marked on the chart; the median year is 33.8 C (92.9 F).

Hottest day (TXx) at Isilkul by year
Year	Hottest day (TXx)
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	33.9 C (93.0 F)
1949	32.2 C (90.0 F)
1950	32.2 C (90.0 F)
1951	31.1 C (88.0 F)
1952	33.9 C (93.0 F)
1953	37.2 C (99.0 F)
1954	32.2 C (90.0 F)
1955	33.9 C (93.0 F)
1956	20.0 C (68.0 F)
1957	32.2 C (90.0 F)
1958	28.9 C (84.0 F)
1959	n/a
1960	2.2 C (36.0 F)
1961	30.0 C (86.0 F)
1962	30.0 C (86.0 F)
1963	17.8 C (64.0 F)
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	37.8 C (100.0 F)
1970	32.8 C (91.0 F)
1971	32.8 C (91.0 F)
1972	n/a
1973	33.0 C (91.4 F)
1974	35.0 C (95.0 F)
1975	38.0 C (100.4 F)
1976	34.0 C (93.2 F)
1977	35.0 C (95.0 F)
1978	36.0 C (96.8 F)
1979	32.0 C (89.6 F)
1980	36.0 C (96.8 F)
1981	32.0 C (89.6 F)
1982	34.5 C (94.1 F)
1983	35.3 C (95.5 F)
1984	35.0 C (95.0 F)
1985	32.7 C (90.9 F)
1986	32.5 C (90.5 F)
1987	33.7 C (92.7 F)
1988	36.9 C (98.4 F)
1989	36.5 C (97.7 F)
1990	34.7 C (94.5 F)
1991	35.0 C (95.0 F)
1992	34.5 C (94.1 F)
1993	33.8 C (92.8 F)
1994	36.0 C (96.8 F)
1995	33.0 C (91.4 F)
1996	33.7 C (92.7 F)
1997	33.1 C (91.6 F)
1998	36.7 C (98.1 F)
1999	35.2 C (95.4 F)
2000	34.5 C (94.1 F)
2001	35.1 C (95.2 F)
2002	30.5 C (86.9 F)
2003	33.5 C (92.3 F)
2004	36.7 C (98.1 F)
2005	35.6 C (96.1 F)
2006	33.9 C (93.0 F)
2007	34.6 C (94.3 F)
2008	33.6 C (92.5 F)
2009	35.1 C (95.2 F)
2010	38.0 C (100.4 F)
2011	31.6 C (88.9 F)
2012	38.5 C (101.3 F)
2013	29.0 C (84.2 F)
2014	14.9 C (58.8 F)
2015	34.3 C (93.7 F)
2016	25.2 C (77.4 F)
2017	14.1 C (57.4 F)
2018	8.1 C (46.6 F)

Coldest night (TNn)

The coldest night of the year at Isilkul, 1936 to 2018. The record is -46.0 C (-50.8 F) in 1979, marked on the chart; the median year is -36.8 C (-34.2 F).

Coldest night (TNn) at Isilkul by year
Year	Coldest night (TNn)
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	-40.0 C (-40.0 F)
1949	-33.9 C (-29.0 F)
1950	-40.0 C (-40.0 F)
1951	-42.2 C (-44.0 F)
1952	-33.9 C (-29.0 F)
1953	-33.9 C (-29.0 F)
1954	-37.8 C (-36.0 F)
1955	-37.2 C (-35.0 F)
1956	n/a
1957	n/a
1958	n/a
1959	-15.0 C (5.0 F)
1960	-17.8 C (0.0 F)
1961	-17.8 C (0.0 F)
1962	-17.2 C (1.0 F)
1963	0.0 C (32.0 F)
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	-43.9 C (-47.0 F)
1970	-38.9 C (-38.0 F)
1971	-40.0 C (-40.0 F)
1972	n/a
1973	-43.0 C (-45.4 F)
1974	-40.0 C (-40.0 F)
1975	-39.0 C (-38.2 F)
1976	-44.0 C (-47.2 F)
1977	-40.0 C (-40.0 F)
1978	-37.0 C (-34.6 F)
1979	-46.0 C (-50.8 F)
1980	-38.0 C (-36.4 F)
1981	-32.0 C (-25.6 F)
1982	-33.6 C (-28.5 F)
1983	-29.1 C (-20.4 F)
1984	-41.1 C (-42.0 F)
1985	-33.5 C (-28.3 F)
1986	-36.0 C (-32.8 F)
1987	-35.4 C (-31.7 F)
1988	-36.5 C (-33.7 F)
1989	-37.0 C (-34.6 F)
1990	-27.8 C (-18.0 F)
1991	-30.8 C (-23.4 F)
1992	-29.8 C (-21.6 F)
1993	-33.6 C (-28.5 F)
1994	-41.0 C (-41.8 F)
1995	-31.0 C (-23.8 F)
1996	-39.2 C (-38.6 F)
1997	-41.1 C (-42.0 F)
1998	-38.1 C (-36.6 F)
1999	-37.5 C (-35.5 F)
2000	-38.9 C (-38.0 F)
2001	-41.1 C (-42.0 F)
2002	-37.5 C (-35.5 F)
2003	-30.4 C (-22.7 F)
2004	-33.0 C (-27.4 F)
2005	-35.0 C (-31.0 F)
2006	-43.5 C (-46.3 F)
2007	-33.0 C (-27.4 F)
2008	-34.0 C (-29.2 F)
2009	-36.0 C (-32.8 F)
2010	-40.0 C (-40.0 F)
2011	-36.6 C (-33.9 F)
2012	-41.2 C (-42.2 F)
2013	-30.3 C (-22.5 F)
2014	-36.6 C (-33.9 F)
2015	-35.4 C (-31.7 F)
2016	-38.7 C (-37.7 F)
2017	-33.9 C (-29.0 F)
2018	-38.8 C (-37.8 F)

Wettest day (Rx1day)

The wettest day of the year at Isilkul, 1936 to 2018. The record is 68.1 mm (2.7 in) in 1951, marked on the chart; the median year is 24.7 mm (1.0 in).

Wettest day (Rx1day) at Isilkul by year
Year	Wettest day (Rx1day)
1936	16.6 mm (0.7 in)
1937	32.6 mm (1.3 in)
1938	43.4 mm (1.7 in)
1939	46.4 mm (1.8 in)
1940	26.6 mm (1.0 in)
1941	22.5 mm (0.9 in)
1942	61.2 mm (2.4 in)
1943	19.0 mm (0.7 in)
1944	16.4 mm (0.6 in)
1945	27.8 mm (1.1 in)
1946	35.6 mm (1.4 in)
1947	34.3 mm (1.4 in)
1948	16.8 mm (0.7 in)
1949	32.7 mm (1.3 in)
1950	26.8 mm (1.1 in)
1951	68.1 mm (2.7 in)
1952	31.2 mm (1.2 in)
1953	43.3 mm (1.7 in)
1954	23.1 mm (0.9 in)
1955	20.4 mm (0.8 in)
1956	48.5 mm (1.9 in)
1957	20.7 mm (0.8 in)
1958	38.5 mm (1.5 in)
1959	40.0 mm (1.6 in)
1960	24.5 mm (1.0 in)
1961	54.3 mm (2.1 in)
1962	21.7 mm (0.9 in)
1963	63.0 mm (2.5 in)
1964	45.8 mm (1.8 in)
1965	23.2 mm (0.9 in)
1966	27.1 mm (1.1 in)
1967	28.5 mm (1.1 in)
1968	28.6 mm (1.1 in)
1969	45.0 mm (1.8 in)
1970	24.0 mm (0.9 in)
1971	35.2 mm (1.4 in)
1972	20.8 mm (0.8 in)
1973	14.0 mm (0.6 in)
1974	21.6 mm (0.9 in)
1975	40.2 mm (1.6 in)
1976	63.5 mm (2.5 in)
1977	39.9 mm (1.6 in)
1978	26.8 mm (1.1 in)
1979	36.2 mm (1.4 in)
1980	15.9 mm (0.6 in)
1981	50.0 mm (2.0 in)
1982	25.5 mm (1.0 in)
1983	20.1 mm (0.8 in)
1984	16.6 mm (0.7 in)
1985	25.1 mm (1.0 in)
1986	24.7 mm (1.0 in)
1987	21.2 mm (0.8 in)
1988	16.4 mm (0.6 in)
1989	20.0 mm (0.8 in)
1990	18.6 mm (0.7 in)
1991	28.4 mm (1.1 in)
1992	30.4 mm (1.2 in)
1993	40.9 mm (1.6 in)
1994	39.9 mm (1.6 in)
1995	22.9 mm (0.9 in)
1996	15.0 mm (0.6 in)
1997	21.1 mm (0.8 in)
1998	20.1 mm (0.8 in)
1999	10.9 mm (0.4 in)
2000	0.0 mm (0.00 in)
2001	11.2 mm (0.4 in)
2002	0.0 mm (0.00 in)
2003	0.0 mm (0.00 in)
2004	0.0 mm (0.00 in)
2005	0.0 mm (0.00 in)
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	10.2 mm (0.4 in)
2013	19.1 mm (0.8 in)
2014	46.0 mm (1.8 in)
2015	56.4 mm (2.2 in)
2016	23.9 mm (0.9 in)
2017	19.1 mm (0.8 in)
2018	12.4 mm (0.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Isilkul, 1936 to 2018. The record is 111.1 mm (4.4 in) in 1942, marked on the chart; the median year is 41.6 mm (1.6 in).

Wettest five days (Rx5day) at Isilkul by year
Year	Wettest five days (Rx5day)
1936	38.5 mm (1.5 in)
1937	43.0 mm (1.7 in)
1938	58.6 mm (2.3 in)
1939	68.7 mm (2.7 in)
1940	44.5 mm (1.8 in)
1941	61.6 mm (2.4 in)
1942	111.1 mm (4.4 in)
1943	56.7 mm (2.2 in)
1944	35.1 mm (1.4 in)
1945	62.5 mm (2.5 in)
1946	46.0 mm (1.8 in)
1947	37.5 mm (1.5 in)
1948	26.1 mm (1.0 in)
1949	56.3 mm (2.2 in)
1950	49.5 mm (1.9 in)
1951	70.1 mm (2.8 in)
1952	56.6 mm (2.2 in)
1953	51.9 mm (2.0 in)
1954	29.1 mm (1.1 in)
1955	30.8 mm (1.2 in)
1956	75.7 mm (3.0 in)
1957	61.0 mm (2.4 in)
1958	50.1 mm (2.0 in)
1959	43.8 mm (1.7 in)
1960	38.1 mm (1.5 in)
1961	83.0 mm (3.3 in)
1962	36.8 mm (1.4 in)
1963	91.6 mm (3.6 in)
1964	57.6 mm (2.3 in)
1965	25.8 mm (1.0 in)
1966	47.5 mm (1.9 in)
1967	38.2 mm (1.5 in)
1968	35.4 mm (1.4 in)
1969	98.2 mm (3.9 in)
1970	52.4 mm (2.1 in)
1971	62.7 mm (2.5 in)
1972	33.1 mm (1.3 in)
1973	46.4 mm (1.8 in)
1974	30.7 mm (1.2 in)
1975	75.7 mm (3.0 in)
1976	66.2 mm (2.6 in)
1977	29.2 mm (1.1 in)
1978	36.5 mm (1.4 in)
1979	56.7 mm (2.2 in)
1980	22.3 mm (0.9 in)
1981	50.0 mm (2.0 in)
1982	53.5 mm (2.1 in)
1983	33.5 mm (1.3 in)
1984	27.9 mm (1.1 in)
1985	31.5 mm (1.2 in)
1986	40.6 mm (1.6 in)
1987	32.9 mm (1.3 in)
1988	35.6 mm (1.4 in)
1989	37.1 mm (1.5 in)
1990	25.5 mm (1.0 in)
1991	49.5 mm (1.9 in)
1992	65.5 mm (2.6 in)
1993	27.2 mm (1.1 in)
1994	42.5 mm (1.7 in)
1995	25.5 mm (1.0 in)
1996	22.9 mm (0.9 in)
1997	10.1 mm (0.4 in)
1998	21.6 mm (0.9 in)
1999	19.6 mm (0.8 in)
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	14.2 mm (0.6 in)
2013	31.8 mm (1.3 in)
2014	n/a
2015	69.4 mm (2.7 in)
2016	32.3 mm (1.3 in)
2017	28.3 mm (1.1 in)
2018	18.1 mm (0.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Isilkul, 1936 to 2018. The record is 58 days in 1950, marked on the chart; the median year is 29 days.

Longest dry spell (CDD) at Isilkul by year
Year	Longest dry spell (CDD)
1936	34 days
1937	31 days
1938	29 days
1939	36 days
1940	24 days
1941	24 days
1942	37 days
1943	31 days
1944	32 days
1945	44 days
1946	28 days
1947	21 days
1948	22 days
1949	52 days
1950	58 days
1951	38 days
1952	56 days
1953	33 days
1954	41 days
1955	48 days
1956	25 days
1957	28 days
1958	24 days
1959	33 days
1960	32 days
1961	22 days
1962	33 days
1963	42 days
1964	37 days
1965	41 days
1966	31 days
1967	31 days
1968	26 days
1969	35 days
1970	44 days
1971	31 days
1972	22 days
1973	36 days
1974	39 days
1975	28 days
1976	43 days
1977	14 days
1978	33 days
1979	29 days
1980	44 days
1981	29 days
1982	20 days
1983	27 days
1984	49 days
1985	42 days
1986	26 days
1987	38 days
1988	33 days
1989	25 days
1990	23 days
1991	30 days
1992	29 days
1993	21 days
1994	28 days
1995	25 days
1996	7 days
1997	9 days
1998	11 days
1999	21 days
2000	2 days
2001	1 day
2002	1 day
2003	1 day
2004	1 day
2005	1 day
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	23 days
2013	24 days
2014	n/a
2015	12 days
2016	20 days
2017	18 days
2018	33 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

58 years, 1936 to 1995

A day with at least 28.0 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 82.4 mm (3.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Isilkul: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	28.0 mm (1.1 in)
5 years	39.8 mm (1.6 in)
10 years	48.6 mm (1.9 in)
25 years	61.0 mm (2.4 in)
50 years	71.3 mm (2.8 in)
100 years	82.4 mm (3.2 in)	Longer than the 58 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, 58 years of values from 1936 to 1995.

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: 68.1 mm (2.7 in) in 1951; 63.5 mm (2.5 in) in 1976; 63.0 mm (2.5 in) in 1963.

Download the Data

Data for Isilkul standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Isilkul 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 2026-10-16 (16 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).