Ust-Oloj Weather Records (RSM00025325)

Record envelope, standing records and threshold days for Ust-Oloj (RSM00025325), Russia, with 78 years of record.

Key Facts for Ust-Oloj

Ust-Oloj (RSM00025325) is a weather station in Russia at 66.55 latitude and 159.42 longitude, 127 m (417 ft) above sea level.
The station reports from 1936 to 2013, 78 years of record.
1,464 records set at Ust-Oloj still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Ust-Oloj set a daily record precipitation of 32.2 mm (1.3 in) on 28 July 2013.

About the Station

Location: Russia, 66.55 latitude, 159.42 longitude.
Elevation: 127 m (417 ft).
Period of record: 1936 to 2013, 78 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 Ust-Oloj. 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 Ust-Oloj, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	4.2 C (39.6 F)	-57.9 C (-72.2 F)	n/a	n/a
Feb	0.6 C (33.1 F)	-59.6 C (-75.3 F)	n/a	n/a
Mar	7.1 C (44.8 F)	-52.0 C (-61.6 F)	n/a	n/a
Apr	10.9 C (51.6 F)	-42.2 C (-44.0 F)	n/a	n/a
May	25.6 C (78.1 F)	-35.2 C (-31.4 F)	n/a	n/a
Jun	32.6 C (90.7 F)	-5.6 C (21.9 F)	n/a	n/a
Jul	34.2 C (93.6 F)	-4.0 C (24.8 F)	n/a	n/a
Aug	30.4 C (86.7 F)	-9.2 C (15.4 F)	n/a	n/a
Sep	24.6 C (76.3 F)	-19.3 C (-2.7 F)	n/a	n/a
Oct	14.4 C (57.9 F)	-36.4 C (-33.5 F)	n/a	n/a
Nov	8.3 C (46.9 F)	-51.2 C (-60.2 F)	n/a	n/a
Dec	5.2 C (41.4 F)	-54.7 C (-66.5 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ust-Oloj still stand. 1964 holds the most, with 44.

Standing records at Ust-Oloj by the year they were set
Year set	Standing records
1936	4
1937	6
1942	9
1943	20
1944	21
1945	5
1946	13
1947	12
1948	22
1949	8
1950	23
1951	19
1952	32
1953	6
1954	34
1955	37
1956	16
1957	23
1958	26
1959	20
1960	11
1961	13
1962	16
1963	18
1964	44
1965	24
1966	23
1967	32
1968	11
1969	28
1970	21
1971	12
1972	13
1973	24
1974	10
1975	5
1976	15
1977	14
1978	7
1979	24
1980	25
1981	14
1982	29
1983	25
1984	39
1985	28
1986	16
1987	8
1988	9
1989	30
1990	15
1991	16
1992	18
1993	33
1994	29
1995	34
1996	23
1997	16
1998	24
1999	17
2000	21
2001	14
2002	32
2003	21
2004	10
2005	9
2006	30
2007	15
2008	23
2009	21
2010	29
2011	28
2012	17
2013	25

All-Time Record Progression

3 new records

3 all-time records were set at Ust-Oloj between 4 July 1981 and 25 July 2003. Each dot is a new record.

When Ust-Oloj set new all-time records
Date	Kind	Detail
1981-07-04	Record high maximum temperature	Record high maximum temperature 33.5 C (92.3 F)
2002-02-06	Record low minimum temperature	Record low minimum temperature -59.6 C (-75.3 F)
2003-07-25	Record high maximum temperature	Record high maximum temperature 34.2 C (93.6 F)

Wettest Day of Each Month

Jul: 47.2 mm (1.9 in)

The wettest day on record for each calendar month at Ust-Oloj. The most was 47.2 mm (1.9 in) on 22 July 1964.

Record daily precipitation for each month at Ust-Oloj
Month	Record daily precipitation (mm)	Date
Jan	10.9 mm (0.4 in)	1 January 1973
Feb	9.9 mm (0.39 in)	15 February 1989
Mar	7.6 mm (0.30 in)	21 March 2004
Apr	10.6 mm (0.4 in)	1 April 1963
May	18.8 mm (0.7 in)	29 May 1982
Jun	34.6 mm (1.4 in)	22 June 1987
Jul	47.2 mm (1.9 in)	22 July 1964
Aug	39.2 mm (1.5 in)	16 August 1984
Sep	31.7 mm (1.2 in)	8 September 2001
Oct	14.9 mm (0.6 in)	2 October 1944
Nov	18.0 mm (0.7 in)	3 November 1991
Dec	15.3 mm (0.6 in)	2 December 2007

Period of Record Coverage

1936 to 2013

74 years of record at Ust-Oloj, 1936 to 2013. 8 years have data for under 90 percent of days and are left out of rankings: 1936, 1937, 1942, 1950, 1951, 2003, 2012, 2013.

Days with data per year at Ust-Oloj
Year	Days with data	Share of year	Complete
1936	38	10%	No
1937	91	25%	No
1942	92	25%	No
1943	365	100%	Yes
1944	366	100%	Yes
1945	364	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	365	100%	Yes
1949	330	90%	Yes
1950	273	75%	No
1951	214	59%	No
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	364	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	356	98%	Yes
1967	345	95%	Yes
1968	358	98%	Yes
1969	362	99%	Yes
1970	364	100%	Yes
1971	359	98%	Yes
1972	364	99%	Yes
1973	357	98%	Yes
1974	363	99%	Yes
1975	361	99%	Yes
1976	364	99%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	357	98%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	345	94%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	308	84%	No
2004	366	100%	Yes
2005	365	100%	Yes
2006	347	95%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	362	99%	Yes
2012	284	78%	No
2013	230	63%	No

Latest Records

Latest records at Ust-Oloj
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 July 2013	Ust-Oloj, RU	daily rain	32.2 mm (1.3 in)	18.8 mm (0.7 in)	28 years	51 of 100 (Notable)
12 July 2013	Ust-Oloj, RU	daily high min	14.8 C (58.6 F)	0.8 C (1.4 F)	0 years	9 of 100 (Routine)
10 July 2013	Ust-Oloj, RU	daily high min	15.1 C (59.2 F)	0.3 C (0.5 F)	12 years	10 of 100 (Routine)
9 July 2013	Ust-Oloj, RU	daily high min	16.1 C (61.0 F)	2.8 C (5.0 F)	20 years	20 of 100 (Routine)
8 July 2013	Ust-Oloj, RU	daily high min	17.0 C (62.6 F)	3.7 C (6.7 F)	0 years	16 of 100 (Routine)
7 July 2013	Ust-Oloj, RU	daily high min	15.5 C (59.9 F)	0.1 C (0.2 F)	22 years	13 of 100 (Routine)
11 June 2013	Ust-Oloj, RU	daily rain	10.9 mm (0.4 in)	3.0 mm (0.12 in)	32 years	20 of 100 (Routine)
4 June 2013	Ust-Oloj, RU	daily high min	10.0 C (50.0 F)	0.9 C (1.6 F)	46 years	22 of 100 (Routine)
23 May 2013	Ust-Oloj, RU	daily low min	-9.1 C (15.6 F)	2.1 C (3.8 F)	4 years	11 of 100 (Routine)
15 May 2013	Ust-Oloj, RU	daily high max	17.1 C (62.8 F)	0.5 C (0.9 F)	46 years	20 of 100 (Routine)
12 May 2013	Ust-Oloj, RU	daily high max	18.0 C (64.4 F)	3.5 C (6.3 F)	28 years	20 of 100 (Routine)
12 May 2013	Ust-Oloj, RU	daily high min	3.9 C (39.0 F)	1.4 C (2.5 F)	27 years	17 of 100 (Routine)
11 May 2013	Ust-Oloj, RU	daily high max	19.8 C (67.6 F)	4.5 C (8.1 F)	68 years	33 of 100 (Routine)
10 May 2013	Ust-Oloj, RU	daily high max	14.3 C (57.7 F)	0.3 C (0.5 F)	68 years	27 of 100 (Routine)
7 May 2013	Ust-Oloj, RU	daily high max	14.5 C (58.1 F)	2.8 C (5.0 F)	48 years	25 of 100 (Routine)
7 May 2013	Ust-Oloj, RU	daily high min (Tie)	2.3 C (36.1 F)	tie	68 years	6 of 100 (Routine)
6 May 2013	Ust-Oloj, RU	daily high max	17.3 C (63.1 F)	6.0 C (10.8 F)	68 years	36 of 100 (Notable)
5 May 2013	Ust-Oloj, RU	daily high max	15.8 C (60.4 F)	3.2 C (5.8 F)	28 years	19 of 100 (Routine)
4 May 2013	Ust-Oloj, RU	daily high max	14.7 C (58.5 F)	2.9 C (5.2 F)	46 years	24 of 100 (Routine)
3 May 2013	Ust-Oloj, RU	daily high max	10.9 C (51.6 F)	0.5 C (0.9 F)	43 years	19 of 100 (Routine)

Climate Trend

62 complete years, 1943 to 2011

One stripe for each of 62 complete years at Ust-Oloj, 1943 to 2011. Blue stripes are years cooler than the station's own mean of -11.9 C (10.5 F); red stripes are warmer. The coolest year was 1946, at -14.1 C (6.7 F), and the warmest was 2007, at -9.2 C (15.4 F). The strongest colour marks a difference of 2.7 C (4.9 F).

Annual mean temperature at Ust-Oloj as warming stripes, 1943 to 2011
Year	Annual mean temperature	Difference from the station mean
1943	-10.5 C	+1.47 C
1944	-10.8 C	+1.15 C
1945	-12.0 C	-0.09 C
1946	-14.1 C	-2.15 C
1947	-12.1 C	-0.19 C
1948	-11.0 C	+0.91 C
1952	-12.4 C	-0.49 C
1953	-10.8 C	+1.08 C
1954	-11.9 C	+0.03 C
1955	-12.4 C	-0.47 C
1956	-12.4 C	-0.46 C
1957	-12.1 C	-0.18 C
1958	-13.8 C	-1.86 C
1959	-11.0 C	+0.89 C
1960	-11.0 C	+0.92 C
1961	-12.0 C	-0.06 C
1962	-11.0 C	+0.92 C
1963	-11.8 C	+0.14 C
1964	-13.3 C	-1.36 C
1965	-13.8 C	-1.92 C
1966	-12.4 C	-0.47 C
1968	-11.9 C	+0.06 C
1969	-11.9 C	-0.01 C
1970	-12.7 C	-0.82 C
1971	-12.5 C	-0.59 C
1972	-12.2 C	-0.31 C
1973	-13.1 C	-1.19 C
1974	-12.4 C	-0.50 C
1975	-12.3 C	-0.38 C
1976	-13.5 C	-1.61 C
1977	-12.8 C	-0.88 C
1978	-12.5 C	-0.57 C
1979	-12.9 C	-1.02 C
1980	-11.9 C	+0.05 C
1981	-10.9 C	+1.01 C
1982	-13.4 C	-1.49 C
1983	-12.0 C	-0.05 C
1984	-12.1 C	-0.16 C
1985	-11.2 C	+0.74 C
1986	-11.9 C	+0.00 C
1987	-13.5 C	-1.57 C
1988	-11.5 C	+0.47 C
1989	-11.4 C	+0.50 C
1990	-11.7 C	+0.23 C
1991	-11.0 C	+0.88 C
1992	-13.2 C	-1.29 C
1993	-13.3 C	-1.40 C
1994	-11.6 C	+0.33 C
1995	-9.8 C	+2.09 C
1997	-11.0 C	+0.96 C
1998	-13.3 C	-1.41 C
1999	-13.4 C	-1.45 C
2000	-11.3 C	+0.65 C
2001	-11.1 C	+0.79 C
2002	-10.6 C	+1.34 C
2004	-11.7 C	+0.26 C
2005	-11.3 C	+0.58 C
2007	-9.2 C	+2.68 C
2008	-10.0 C	+1.96 C
2009	-11.3 C	+0.62 C
2010	-10.0 C	+1.95 C
2011	-11.2 C	+0.73 C

The annual mean temperature here has risen by 0.14 C (0.01 to 0.28) per decade over 1943 to 2011. In Fahrenheit: 0.26 F (0.01 to 0.51) per decade. The slope is a straight line fitted to 62 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Ust-Oloj
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.14 C (0.01 to 0.28) per decade	0.26 F (0.01 to 0.51) per decade	1943 to 2011	62	Rise
Mean daily maximum	0.14 C (-0.01 to 0.29) per decade	0.25 F (-0.01 to 0.52) per decade	1943 to 2011	62	Not clearly different from zero
Mean daily minimum	0.15 C (0.01 to 0.28) per decade	0.26 F (0.02 to 0.51) per decade	1943 to 2011	62	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

1936 to 2013

Yearly extremes at Ust-Oloj: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	34.2 C (93.6 F)	2003	29.7 C (85.5 F)	74
Coldest night (TNn)	-59.6 C (-75.3 F)	2002	-51.4 C (-60.6 F)	74
Wettest day (Rx1day)	47.2 mm (1.9 in)	1964	17.2 mm (0.7 in)	74
Wettest five days (Rx5day)	77.1 mm (3.0 in)	1987	31.3 mm (1.2 in)	74
Longest dry spell (CDD)	95 days	1951	36 days	74

Hottest day (TXx)

The hottest day of the year at Ust-Oloj, 1936 to 2013. The record is 34.2 C (93.6 F) in 2003, marked on the chart; the median year is 29.7 C (85.5 F).

Hottest day (TXx) at Ust-Oloj by year
Year	Hottest day (TXx)
1936	-0.1 C (31.8 F)
1937	28.3 C (82.9 F)
1942	3.2 C (37.8 F)
1943	30.4 C (86.7 F)
1944	29.0 C (84.2 F)
1945	27.2 C (81.0 F)
1946	27.8 C (82.0 F)
1947	26.7 C (80.1 F)
1948	27.6 C (81.7 F)
1949	29.4 C (84.9 F)
1950	25.5 C (77.9 F)
1951	28.5 C (83.3 F)
1952	31.6 C (88.9 F)
1953	30.1 C (86.2 F)
1954	28.4 C (83.1 F)
1955	29.5 C (85.1 F)
1956	32.4 C (90.3 F)
1957	31.7 C (89.1 F)
1958	30.5 C (86.9 F)
1959	31.2 C (88.2 F)
1960	31.1 C (88.0 F)
1961	30.1 C (86.2 F)
1962	27.1 C (80.8 F)
1963	29.8 C (85.6 F)
1964	28.8 C (83.8 F)
1965	28.4 C (83.1 F)
1966	32.3 C (90.1 F)
1967	29.4 C (84.9 F)
1968	28.5 C (83.3 F)
1969	30.8 C (87.4 F)
1970	28.4 C (83.1 F)
1971	29.5 C (85.1 F)
1972	27.3 C (81.1 F)
1973	31.3 C (88.3 F)
1974	29.8 C (85.6 F)
1975	32.4 C (90.3 F)
1976	31.6 C (88.9 F)
1977	30.6 C (87.1 F)
1978	27.8 C (82.0 F)
1979	25.7 C (78.3 F)
1980	26.7 C (80.1 F)
1981	33.5 C (92.3 F)
1982	28.5 C (83.3 F)
1983	31.8 C (89.2 F)
1984	28.1 C (82.6 F)
1985	28.6 C (83.5 F)
1986	29.4 C (84.9 F)
1987	30.0 C (86.0 F)
1988	29.2 C (84.6 F)
1989	33.3 C (91.9 F)
1990	29.4 C (84.9 F)
1991	32.6 C (90.7 F)
1992	29.6 C (85.3 F)
1993	31.1 C (88.0 F)
1994	29.9 C (85.8 F)
1995	29.1 C (84.4 F)
1996	30.7 C (87.3 F)
1997	29.3 C (84.7 F)
1998	29.2 C (84.6 F)
1999	30.3 C (86.5 F)
2000	32.0 C (89.6 F)
2001	33.1 C (91.6 F)
2002	31.2 C (88.2 F)
2003	34.2 C (93.6 F)
2004	30.5 C (86.9 F)
2005	30.1 C (86.2 F)
2006	33.6 C (92.5 F)
2007	29.1 C (84.4 F)
2008	33.6 C (92.5 F)
2009	29.0 C (84.2 F)
2010	33.5 C (92.3 F)
2011	29.0 C (84.2 F)
2012	30.6 C (87.1 F)
2013	31.4 C (88.5 F)

Coldest night (TNn)

The coldest night of the year at Ust-Oloj, 1936 to 2013. The record is -59.6 C (-75.3 F) in 2002, marked on the chart; the median year is -51.4 C (-60.6 F).

Coldest night (TNn) at Ust-Oloj by year
Year	Coldest night (TNn)
1936	-52.1 C (-61.8 F)
1937	-50.6 C (-59.1 F)
1942	-46.7 C (-52.1 F)
1943	-47.9 C (-54.2 F)
1944	-49.9 C (-57.8 F)
1945	-53.1 C (-63.6 F)
1946	-51.9 C (-61.4 F)
1947	-51.9 C (-61.4 F)
1948	-53.5 C (-64.3 F)
1949	-52.0 C (-61.6 F)
1950	-51.2 C (-60.2 F)
1951	-52.8 C (-63.0 F)
1952	-54.1 C (-65.4 F)
1953	-48.2 C (-54.8 F)
1954	-53.2 C (-63.8 F)
1955	-47.9 C (-54.2 F)
1956	-51.3 C (-60.3 F)
1957	-50.8 C (-59.4 F)
1958	-51.2 C (-60.2 F)
1959	-48.6 C (-55.5 F)
1960	-48.9 C (-56.0 F)
1961	-49.7 C (-57.5 F)
1962	-49.3 C (-56.7 F)
1963	-50.0 C (-58.0 F)
1964	-57.9 C (-72.2 F)
1965	-53.1 C (-63.6 F)
1966	-54.2 C (-65.6 F)
1967	-54.7 C (-66.5 F)
1968	-50.5 C (-58.9 F)
1969	-51.1 C (-60.0 F)
1970	-54.7 C (-66.5 F)
1971	-54.0 C (-65.2 F)
1972	-53.0 C (-63.4 F)
1973	-54.3 C (-65.7 F)
1974	-51.5 C (-60.7 F)
1975	-49.3 C (-56.7 F)
1976	-52.2 C (-62.0 F)
1977	-52.9 C (-63.2 F)
1978	-54.4 C (-65.9 F)
1979	-51.6 C (-60.9 F)
1980	-48.9 C (-56.0 F)
1981	-48.5 C (-55.3 F)
1982	-52.6 C (-62.7 F)
1983	-52.2 C (-62.0 F)
1984	-52.4 C (-62.3 F)
1985	-49.0 C (-56.2 F)
1986	-54.4 C (-65.9 F)
1987	-51.4 C (-60.5 F)
1988	-48.3 C (-54.9 F)
1989	-50.6 C (-59.1 F)
1990	-52.0 C (-61.6 F)
1991	-48.3 C (-54.9 F)
1992	-49.0 C (-56.2 F)
1993	-52.8 C (-63.0 F)
1994	-52.8 C (-63.0 F)
1995	-50.9 C (-59.6 F)
1996	-52.4 C (-62.3 F)
1997	-52.9 C (-63.2 F)
1998	-49.8 C (-57.6 F)
1999	-51.9 C (-61.4 F)
2000	-55.1 C (-67.2 F)
2001	-51.2 C (-60.2 F)
2002	-59.6 C (-75.3 F)
2003	-46.6 C (-51.9 F)
2004	-47.9 C (-54.2 F)
2005	-53.9 C (-65.0 F)
2006	-48.5 C (-55.3 F)
2007	-47.1 C (-52.8 F)
2008	-52.2 C (-62.0 F)
2009	-49.9 C (-57.8 F)
2010	-50.6 C (-59.1 F)
2011	-50.3 C (-58.5 F)
2012	-51.5 C (-60.7 F)
2013	-49.4 C (-56.9 F)

Wettest day (Rx1day)

The wettest day of the year at Ust-Oloj, 1936 to 2013. The record is 47.2 mm (1.9 in) in 1964, marked on the chart; the median year is 17.2 mm (0.7 in).

Wettest day (Rx1day) at Ust-Oloj by year
Year	Wettest day (Rx1day)
1936	1.0 mm (0.04 in)
1937	7.6 mm (0.30 in)
1942	6.6 mm (0.26 in)
1943	17.4 mm (0.7 in)
1944	18.0 mm (0.7 in)
1945	23.4 mm (0.9 in)
1946	18.8 mm (0.7 in)
1947	11.9 mm (0.5 in)
1948	13.8 mm (0.5 in)
1949	13.4 mm (0.5 in)
1950	28.2 mm (1.1 in)
1951	8.0 mm (0.31 in)
1952	12.0 mm (0.5 in)
1953	15.2 mm (0.6 in)
1954	46.5 mm (1.8 in)
1955	14.5 mm (0.6 in)
1956	17.1 mm (0.7 in)
1957	15.1 mm (0.6 in)
1958	10.3 mm (0.4 in)
1959	12.5 mm (0.5 in)
1960	11.6 mm (0.5 in)
1961	23.5 mm (0.9 in)
1962	15.4 mm (0.6 in)
1963	13.8 mm (0.5 in)
1964	47.2 mm (1.9 in)
1965	10.4 mm (0.4 in)
1966	14.9 mm (0.6 in)
1967	17.3 mm (0.7 in)
1968	16.8 mm (0.7 in)
1969	10.4 mm (0.4 in)
1970	20.0 mm (0.8 in)
1971	13.0 mm (0.5 in)
1972	19.6 mm (0.8 in)
1973	14.5 mm (0.6 in)
1974	15.4 mm (0.6 in)
1975	12.2 mm (0.5 in)
1976	21.6 mm (0.9 in)
1977	18.4 mm (0.7 in)
1978	23.6 mm (0.9 in)
1979	10.9 mm (0.4 in)
1980	15.5 mm (0.6 in)
1981	26.4 mm (1.0 in)
1982	18.8 mm (0.7 in)
1983	10.6 mm (0.4 in)
1984	39.2 mm (1.5 in)
1985	26.8 mm (1.1 in)
1986	21.1 mm (0.8 in)
1987	34.6 mm (1.4 in)
1988	15.1 mm (0.6 in)
1989	21.7 mm (0.9 in)
1990	26.6 mm (1.0 in)
1991	18.9 mm (0.7 in)
1992	22.5 mm (0.9 in)
1993	29.7 mm (1.2 in)
1994	10.4 mm (0.4 in)
1995	19.7 mm (0.8 in)
1996	13.3 mm (0.5 in)
1997	13.5 mm (0.5 in)
1998	9.6 mm (0.38 in)
1999	20.5 mm (0.8 in)
2000	23.6 mm (0.9 in)
2001	31.7 mm (1.2 in)
2002	18.4 mm (0.7 in)
2003	15.4 mm (0.6 in)
2004	16.0 mm (0.6 in)
2005	14.4 mm (0.6 in)
2006	17.2 mm (0.7 in)
2007	28.8 mm (1.1 in)
2008	26.4 mm (1.0 in)
2009	17.2 mm (0.7 in)
2010	21.4 mm (0.8 in)
2011	13.7 mm (0.5 in)
2012	19.8 mm (0.8 in)
2013	32.2 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ust-Oloj, 1936 to 2013. The record is 77.1 mm (3.0 in) in 1987, marked on the chart; the median year is 31.3 mm (1.2 in).

Wettest five days (Rx5day) at Ust-Oloj by year
Year	Wettest five days (Rx5day)
1936	1.7 mm (0.07 in)
1937	14.3 mm (0.6 in)
1942	16.5 mm (0.6 in)
1943	20.1 mm (0.8 in)
1944	35.0 mm (1.4 in)
1945	35.7 mm (1.4 in)
1946	33.3 mm (1.3 in)
1947	21.8 mm (0.9 in)
1948	21.8 mm (0.9 in)
1949	22.2 mm (0.9 in)
1950	34.1 mm (1.3 in)
1951	11.5 mm (0.5 in)
1952	21.4 mm (0.8 in)
1953	21.9 mm (0.9 in)
1954	51.0 mm (2.0 in)
1955	33.9 mm (1.3 in)
1956	20.9 mm (0.8 in)
1957	37.1 mm (1.5 in)
1958	16.3 mm (0.6 in)
1959	21.9 mm (0.9 in)
1960	21.3 mm (0.8 in)
1961	38.5 mm (1.5 in)
1962	37.5 mm (1.5 in)
1963	34.6 mm (1.4 in)
1964	54.3 mm (2.1 in)
1965	15.3 mm (0.6 in)
1966	30.0 mm (1.2 in)
1967	25.8 mm (1.0 in)
1968	38.3 mm (1.5 in)
1969	25.5 mm (1.0 in)
1970	36.1 mm (1.4 in)
1971	18.9 mm (0.7 in)
1972	36.4 mm (1.4 in)
1973	26.2 mm (1.0 in)
1974	28.7 mm (1.1 in)
1975	25.7 mm (1.0 in)
1976	26.9 mm (1.1 in)
1977	31.8 mm (1.3 in)
1978	49.2 mm (1.9 in)
1979	18.8 mm (0.7 in)
1980	34.5 mm (1.4 in)
1981	42.1 mm (1.7 in)
1982	22.0 mm (0.9 in)
1983	20.1 mm (0.8 in)
1984	43.0 mm (1.7 in)
1985	48.7 mm (1.9 in)
1986	26.4 mm (1.0 in)
1987	77.1 mm (3.0 in)
1988	31.0 mm (1.2 in)
1989	26.0 mm (1.0 in)
1990	48.9 mm (1.9 in)
1991	27.6 mm (1.1 in)
1992	30.5 mm (1.2 in)
1993	43.2 mm (1.7 in)
1994	20.0 mm (0.8 in)
1995	31.5 mm (1.2 in)
1996	20.2 mm (0.8 in)
1997	33.2 mm (1.3 in)
1998	18.8 mm (0.7 in)
1999	33.0 mm (1.3 in)
2000	41.1 mm (1.6 in)
2001	40.5 mm (1.6 in)
2002	41.0 mm (1.6 in)
2003	18.1 mm (0.7 in)
2004	38.0 mm (1.5 in)
2005	25.8 mm (1.0 in)
2006	46.4 mm (1.8 in)
2007	54.5 mm (2.1 in)
2008	35.5 mm (1.4 in)
2009	23.5 mm (0.9 in)
2010	42.2 mm (1.7 in)
2011	40.4 mm (1.6 in)
2012	33.1 mm (1.3 in)
2013	35.6 mm (1.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ust-Oloj, 1936 to 2013. The record is 95 days in 1951, marked on the chart; the median year is 36 days.

Longest dry spell (CDD) at Ust-Oloj by year
Year	Longest dry spell (CDD)
1936	24 days
1937	47 days
1942	27 days
1943	31 days
1944	35 days
1945	32 days
1946	64 days
1947	86 days
1948	57 days
1949	68 days
1950	57 days
1951	95 days
1952	41 days
1953	66 days
1954	20 days
1955	39 days
1956	32 days
1957	54 days
1958	82 days
1959	45 days
1960	49 days
1961	39 days
1962	41 days
1963	52 days
1964	71 days
1965	36 days
1966	22 days
1967	22 days
1968	31 days
1969	47 days
1970	23 days
1971	40 days
1972	36 days
1973	35 days
1974	42 days
1975	26 days
1976	39 days
1977	68 days
1978	63 days
1979	23 days
1980	64 days
1981	25 days
1982	33 days
1983	33 days
1984	55 days
1985	48 days
1986	18 days
1987	32 days
1988	54 days
1989	41 days
1990	23 days
1991	31 days
1992	41 days
1993	36 days
1994	55 days
1995	48 days
1996	35 days
1997	29 days
1998	35 days
1999	34 days
2000	26 days
2001	32 days
2002	25 days
2003	33 days
2004	59 days
2005	71 days
2006	31 days
2007	29 days
2008	72 days
2009	31 days
2010	32 days
2011	36 days
2012	34 days
2013	32 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.

Frost Dates and Growing Season

62 years with a frost

Across 62 years with a frost, the median last spring frost at Ust-Oloj falls on 9 June and the median first autumn frost on 24 July, which leaves a median of 46 days between them.

In 1979 to 2011 the median growing season was 43 days. That is 4 days fewer than in 1943 to 1976.

Fitted over all years, the growing season changes by -0.3 days per decade at this station.

Frost dates and growing season at Ust-Oloj
Measure	Median, all years	Earliest period (1943 to 1976)	Recent period (1979 to 2011)	Recent against earliest	Fitted trend
Last spring frost	9 June	7 June	12 June	5 days later	+0.9 days per decade
First autumn frost	24 July	24 July	20 July	4 days earlier	+0.6 days per decade
Growing days	46 days	47 days	43 days	4 days fewer	-0.3 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

68 years, 1943 to 2011

A day with at least 17.0 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 49.5 mm (1.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Ust-Oloj: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	17.0 mm (0.7 in)
5 years	23.7 mm (0.9 in)
10 years	28.8 mm (1.1 in)
25 years	36.3 mm (1.4 in)
50 years	42.5 mm (1.7 in)
100 years	49.5 mm (1.9 in)	Longer than the 68 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, 68 years of values from 1943 to 2011.

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: 47.2 mm (1.9 in) in 1964; 46.5 mm (1.8 in) in 1954; 39.2 mm (1.5 in) in 1984.

Download the Data

Data for Ust-Oloj standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ust-Oloj 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 2026-10-17 (17 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).