Bolotnoe Weather Records (RSM00029539)

Record envelope, standing records and threshold days for Bolotnoe (RSM00029539), Russia, with 84 years of record.

Key Facts for Bolotnoe

Bolotnoe (RSM00029539) is a weather station in Russia at 55.67 latitude and 84.40 longitude, 191 m (627 ft) above sea level.
The station reports from 1936 to 2019, 84 years of record.
1,464 records set at Bolotnoe still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Bolotnoe set a daily record high minimum temperature of 12.5 C (54.5 F) on 30 April 2019.

About the Station

Location: Russia, 55.67 latitude, 84.40 longitude.
Elevation: 191 m (627 ft).
Period of record: 1936 to 2019, 84 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 Bolotnoe. 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 Bolotnoe, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	4.4 C (39.9 F)	-45.0 C (-49.0 F)	n/a	n/a
Feb	6.7 C (44.1 F)	-44.8 C (-48.6 F)	n/a	n/a
Mar	16.5 C (61.7 F)	-33.2 C (-27.8 F)	n/a	n/a
Apr	29.3 C (84.7 F)	-28.2 C (-18.8 F)	n/a	n/a
May	35.4 C (95.7 F)	-10.1 C (13.8 F)	n/a	n/a
Jun	35.0 C (95.0 F)	-2.4 C (27.7 F)	n/a	n/a
Jul	35.8 C (96.4 F)	1.9 C (35.4 F)	n/a	n/a
Aug	35.3 C (95.5 F)	-0.8 C (30.6 F)	n/a	n/a
Sep	32.5 C (90.5 F)	-7.9 C (17.8 F)	n/a	n/a
Oct	24.0 C (75.2 F)	-24.8 C (-12.6 F)	n/a	n/a
Nov	11.8 C (53.2 F)	-42.1 C (-43.8 F)	n/a	n/a
Dec	4.6 C (40.3 F)	-46.7 C (-52.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Bolotnoe still stand. 1969 holds the most, with 46.

Standing records at Bolotnoe by the year they were set
Year set	Standing records
1936	13
1937	25
1938	11
1939	11
1940	10
1941	7
1942	10
1943	12
1944	4
1945	14
1946	15
1947	13
1948	18
1949	5
1950	10
1951	23
1952	23
1953	35
1954	12
1955	21
1956	5
1957	18
1958	26
1959	13
1960	15
1961	14
1962	8
1963	11
1964	24
1965	13
1966	34
1967	12
1968	23
1969	46
1970	24
1971	15
1972	18
1973	12
1974	20
1975	21
1976	18
1977	15
1978	23
1979	25
1980	9
1981	10
1982	21
1983	23
1984	15
1985	3
1986	9
1987	28
1988	12
1989	16
1990	10
1991	10
1992	20
1993	18
1994	9
1995	21
1996	11
1997	27
1998	20
1999	31
2000	21
2001	39
2002	33
2003	21
2004	26
2005	16
2006	33
2007	9
2008	16
2009	12
2010	17
2011	19
2012	14
2013	24
2014	31
2015	22
2016	11
2017	12
2018	12
2019	8

All-Time Record Progression

1 new records

1 all-time records were set at Bolotnoe between 19 June 1991 and 19 June 1991. Each dot is a new record.

Wettest Day of Each Month

Jun: 100.6 mm (4.0 in)

The wettest day on record for each calendar month at Bolotnoe. The most was 100.6 mm (4.0 in) on 19 June 1991.

Record daily precipitation for each month at Bolotnoe
Month	Record daily precipitation (mm)	Date
Jan	14.5 mm (0.6 in)	1 January 1979
Feb	14.1 mm (0.6 in)	26 February 1947
Mar	16.8 mm (0.7 in)	4 March 1944
Apr	28.3 mm (1.1 in)	1 April 1948
May	47.3 mm (1.9 in)	29 May 1959
Jun	100.6 mm (4.0 in)	19 June 1991
Jul	63.7 mm (2.5 in)	21 July 1962
Aug	53.0 mm (2.1 in)	14 August 1990
Sep	35.5 mm (1.4 in)	3 September 2018
Oct	27.0 mm (1.1 in)	29 October 1940
Nov	22.8 mm (0.9 in)	30 November 1984
Dec	19.8 mm (0.8 in)	9 December 2006

Period of Record Coverage

1936 to 2019

84 years of record at Bolotnoe, 1936 to 2019. 1 years have data for under 90 percent of days and are left out of rankings: 2019.

Days with data per year at Bolotnoe
Year	Days with data	Share of year	Complete
1936	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	365	100%	Yes
1941	365	100%	Yes
1942	364	100%	Yes
1943	365	100%	Yes
1944	365	100%	Yes
1945	364	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	364	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	363	99%	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	364	100%	Yes
1967	364	100%	Yes
1968	358	98%	Yes
1969	360	99%	Yes
1970	359	98%	Yes
1971	365	100%	Yes
1972	364	99%	Yes
1973	356	98%	Yes
1974	363	99%	Yes
1975	364	100%	Yes
1976	361	99%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	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	366	100%	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	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	366	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	181	50%	No

Latest Records

Latest records at Bolotnoe
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 April 2019	Bolotnoe, RU	daily high min	12.5 C (54.5 F)	0.6 C (1.1 F)	36 years	20 of 100 (Routine)
16 March 2019	Bolotnoe, RU	daily high max	6.9 C (44.4 F)	2.2 C (4.0 F)	50 years	26 of 100 (Routine)
14 March 2019	Bolotnoe, RU	daily high min	-1.1 C (30.0 F)	0.2 C (0.4 F)	37 years	19 of 100 (Routine)
8 March 2019	Bolotnoe, RU	daily high min	-2.7 C (27.1 F)	0.1 C (0.2 F)	8 years	10 of 100 (Routine)
4 March 2019	Bolotnoe, RU	daily high max	4.8 C (40.6 F)	1.5 C (2.7 F)	41 years	22 of 100 (Routine)
21 February 2019	Bolotnoe, RU	daily high min	-1.9 C (28.6 F)	1.2 C (2.2 F)	65 years	28 of 100 (Routine)
20 February 2019	Bolotnoe, RU	daily high min	-2.5 C (27.5 F)	0.2 C (0.4 F)	65 years	27 of 100 (Routine)
20 January 2019	Bolotnoe, RU	daily high max	-1.7 C (28.9 F)	0.4 C (0.7 F)	72 years	29 of 100 (Routine)
6 November 2018	Bolotnoe, RU	daily rain	11.1 mm (0.4 in)	2.4 mm (0.09 in)	20 years	20 of 100 (Routine)
29 October 2018	Bolotnoe, RU	daily high max	16.4 C (61.5 F)	6.5 C (11.7 F)	20 years	24 of 100 (Routine)
28 October 2018	Bolotnoe, RU	daily high max	18.6 C (65.5 F)	7.6 C (13.7 F)	69 years	40 of 100 (Notable)
28 October 2018	Bolotnoe, RU	daily high min	4.6 C (40.3 F)	0.1 C (0.2 F)	12 years	11 of 100 (Routine)
27 October 2018	Bolotnoe, RU	daily high max	13.8 C (56.8 F)	1.5 C (2.7 F)	47 years	24 of 100 (Routine)
7 October 2018	Bolotnoe, RU	daily high max	21.9 C (71.4 F)	3.4 C (6.1 F)	75 years	35 of 100 (Notable)
3 September 2018	Bolotnoe, RU	monthly rain	35.5 mm (1.4 in)	4.6 mm (0.18 in)	70 years	50 of 100 (Notable)
6 August 2018	Bolotnoe, RU	daily low min	3.7 C (38.7 F)	0.2 C (0.4 F)	51 years	23 of 100 (Routine)
4 August 2018	Bolotnoe, RU	daily low min	4.0 C (39.2 F)	2.2 C (4.0 F)	16 years	18 of 100 (Routine)
3 August 2018	Bolotnoe, RU	daily low min	3.8 C (38.8 F)	3.4 C (6.1 F)	73 years	39 of 100 (Notable)
31 July 2018	Bolotnoe, RU	daily low min	5.5 C (41.9 F)	0.6 C (1.1 F)	47 years	24 of 100 (Routine)
27 July 2018	Bolotnoe, RU	daily rain	27.0 mm (1.1 in)	0.1 mm (0.00 in)	29 years	16 of 100 (Routine)

Climate Trend

83 complete years, 1936 to 2018

One stripe for each of 83 complete years at Bolotnoe, 1936 to 2018. Blue stripes are years cooler than the station's own mean of 1.1 C (33.9 F); red stripes are warmer. The coolest year was 1969, at -1.4 C (29.5 F), and the warmest was 2015, at 3.4 C (38.0 F). The strongest colour marks a difference of 2.5 C (4.5 F).

Annual mean temperature at Bolotnoe as warming stripes, 1936 to 2018
Year	Annual mean temperature	Difference from the station mean
1936	0.6 C	-0.46 C
1937	-1.1 C	-2.22 C
1938	0.2 C	-0.85 C
1939	1.1 C	+0.03 C
1940	0.7 C	-0.40 C
1941	-0.4 C	-1.43 C
1942	0.7 C	-0.36 C
1943	1.2 C	+0.13 C
1944	1.6 C	+0.53 C
1945	0.4 C	-0.66 C
1946	0.2 C	-0.85 C
1947	-0.4 C	-1.43 C
1948	1.0 C	-0.03 C
1949	0.1 C	-0.93 C
1950	0.3 C	-0.74 C
1951	1.1 C	-0.02 C
1952	0.0 C	-1.11 C
1953	1.6 C	+0.51 C
1954	-1.1 C	-2.14 C
1955	1.1 C	+0.06 C
1956	0.3 C	-0.73 C
1957	0.5 C	-0.57 C
1958	0.1 C	-0.96 C
1959	-0.1 C	-1.15 C
1960	-1.0 C	-2.09 C
1961	1.0 C	-0.11 C
1962	2.2 C	+1.11 C
1963	1.5 C	+0.46 C
1964	0.8 C	-0.26 C
1965	1.5 C	+0.41 C
1966	-0.9 C	-1.95 C
1967	1.3 C	+0.24 C
1968	-0.4 C	-1.45 C
1969	-1.4 C	-2.46 C
1970	0.2 C	-0.92 C
1971	1.2 C	+0.09 C
1972	-0.4 C	-1.45 C
1973	1.8 C	+0.68 C
1974	-0.9 C	-1.93 C
1975	1.3 C	+0.25 C
1976	-0.1 C	-1.22 C
1977	0.7 C	-0.40 C
1978	1.6 C	+0.54 C
1979	0.8 C	-0.29 C
1980	1.3 C	+0.23 C
1981	2.0 C	+0.95 C
1982	2.4 C	+1.32 C
1983	3.0 C	+1.94 C
1984	-0.9 C	-1.95 C
1985	0.2 C	-0.87 C
1986	1.0 C	-0.08 C
1987	0.5 C	-0.56 C
1988	1.8 C	+0.74 C
1989	2.4 C	+1.35 C
1990	2.5 C	+1.38 C
1991	1.9 C	+0.84 C
1992	1.9 C	+0.81 C
1993	1.3 C	+0.21 C
1994	2.3 C	+1.18 C
1995	3.2 C	+2.11 C
1996	0.2 C	-0.88 C
1997	2.7 C	+1.65 C
1998	1.2 C	+0.08 C
1999	2.1 C	+0.99 C
2000	1.1 C	+0.01 C
2001	1.9 C	+0.84 C
2002	3.0 C	+1.93 C
2003	2.2 C	+1.16 C
2004	2.1 C	+1.02 C
2005	1.9 C	+0.82 C
2006	0.9 C	-0.13 C
2007	2.9 C	+1.82 C
2008	2.4 C	+1.32 C
2009	0.5 C	-0.58 C
2010	-0.3 C	-1.41 C
2011	2.2 C	+1.11 C
2012	1.4 C	+0.34 C
2013	2.7 C	+1.58 C
2014	1.6 C	+0.56 C
2015	3.4 C	+2.29 C
2016	2.2 C	+1.12 C
2017	2.8 C	+1.77 C
2018	0.6 C	-0.49 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.3) per decade over 1936 to 2018. In Fahrenheit: 0.5 F (0.3 to 0.6) per decade. The slope is a straight line fitted to 83 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Bolotnoe
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.2 to 0.3) per decade	0.5 F (0.3 to 0.6) per decade	1936 to 2018	83	Rise
Mean daily maximum	0.3 C (0.2 to 0.4) per decade	0.5 F (0.3 to 0.7) per decade	1936 to 2018	83	Rise
Mean daily minimum	0.2 C (0.1 to 0.3) per decade	0.4 F (0.3 to 0.6) per decade	1936 to 2018	83	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 2019

Yearly extremes at Bolotnoe: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.8 C (96.4 F)	1953	32.3 C (90.1 F)	84
Coldest night (TNn)	-46.7 C (-52.1 F)	1958	-38.7 C (-37.7 F)	84
Wettest day (Rx1day)	100.6 mm (4.0 in)	1991	28.0 mm (1.1 in)	84
Wettest five days (Rx5day)	135.8 mm (5.3 in)	1991	43.5 mm (1.7 in)	84
Longest dry spell (CDD)	59 days	1962	21 days	84

Hottest day (TXx)

The hottest day of the year at Bolotnoe, 1936 to 2019. The record is 35.8 C (96.4 F) in 1953, marked on the chart; the median year is 32.3 C (90.1 F).

Hottest day (TXx) at Bolotnoe by year
Year	Hottest day (TXx)
1936	34.5 C (94.1 F)
1937	30.8 C (87.4 F)
1938	31.0 C (87.8 F)
1939	32.5 C (90.5 F)
1940	35.5 C (95.9 F)
1941	30.2 C (86.4 F)
1942	32.0 C (89.6 F)
1943	33.7 C (92.7 F)
1944	32.8 C (91.0 F)
1945	30.2 C (86.4 F)
1946	31.5 C (88.7 F)
1947	30.4 C (86.7 F)
1948	33.8 C (92.8 F)
1949	32.2 C (90.0 F)
1950	31.2 C (88.2 F)
1951	34.4 C (93.9 F)
1952	33.9 C (93.0 F)
1953	35.8 C (96.4 F)
1954	29.9 C (85.8 F)
1955	34.6 C (94.3 F)
1956	32.6 C (90.7 F)
1957	32.4 C (90.3 F)
1958	31.1 C (88.0 F)
1959	30.9 C (87.6 F)
1960	29.4 C (84.9 F)
1961	31.6 C (88.9 F)
1962	32.6 C (90.7 F)
1963	32.2 C (90.0 F)
1964	30.4 C (86.7 F)
1965	35.0 C (95.0 F)
1966	30.6 C (87.1 F)
1967	35.0 C (95.0 F)
1968	33.8 C (92.8 F)
1969	35.0 C (95.0 F)
1970	33.1 C (91.6 F)
1971	31.7 C (89.1 F)
1972	31.1 C (88.0 F)
1973	31.2 C (88.2 F)
1974	34.9 C (94.8 F)
1975	35.3 C (95.5 F)
1976	32.6 C (90.7 F)
1977	33.7 C (92.7 F)
1978	31.7 C (89.1 F)
1979	32.0 C (89.6 F)
1980	34.5 C (94.1 F)
1981	32.7 C (90.9 F)
1982	33.7 C (92.7 F)
1983	32.7 C (90.9 F)
1984	32.3 C (90.1 F)
1985	29.2 C (84.6 F)
1986	31.2 C (88.2 F)
1987	30.6 C (87.1 F)
1988	31.2 C (88.2 F)
1989	34.5 C (94.1 F)
1990	30.8 C (87.4 F)
1991	32.6 C (90.7 F)
1992	32.4 C (90.3 F)
1993	31.5 C (88.7 F)
1994	34.2 C (93.6 F)
1995	32.3 C (90.1 F)
1996	30.5 C (86.9 F)
1997	31.6 C (88.9 F)
1998	34.5 C (94.1 F)
1999	33.8 C (92.8 F)
2000	32.7 C (90.9 F)
2001	32.9 C (91.2 F)
2002	35.3 C (95.5 F)
2003	32.6 C (90.7 F)
2004	35.4 C (95.7 F)
2005	31.9 C (89.4 F)
2006	32.6 C (90.7 F)
2007	30.9 C (87.6 F)
2008	32.0 C (89.6 F)
2009	29.1 C (84.4 F)
2010	32.6 C (90.7 F)
2011	31.3 C (88.3 F)
2012	33.5 C (92.3 F)
2013	29.6 C (85.3 F)
2014	35.5 C (95.9 F)
2015	31.5 C (88.7 F)
2016	31.1 C (88.0 F)
2017	32.3 C (90.1 F)
2018	31.0 C (87.8 F)
2019	27.9 C (82.2 F)

Coldest night (TNn)

The coldest night of the year at Bolotnoe, 1936 to 2019. The record is -46.7 C (-52.1 F) in 1958, marked on the chart; the median year is -38.7 C (-37.7 F).

Coldest night (TNn) at Bolotnoe by year
Year	Coldest night (TNn)
1936	-37.6 C (-35.7 F)
1937	-35.6 C (-32.1 F)
1938	-43.2 C (-45.8 F)
1939	-36.9 C (-34.4 F)
1940	-37.6 C (-35.7 F)
1941	-41.9 C (-43.4 F)
1942	-32.7 C (-26.9 F)
1943	-36.6 C (-33.9 F)
1944	-35.9 C (-32.6 F)
1945	-41.4 C (-42.5 F)
1946	-42.3 C (-44.1 F)
1947	-42.5 C (-44.5 F)
1948	-39.5 C (-39.1 F)
1949	-39.5 C (-39.1 F)
1950	-35.8 C (-32.4 F)
1951	-43.3 C (-45.9 F)
1952	-42.1 C (-43.8 F)
1953	-36.7 C (-34.1 F)
1954	-40.5 C (-40.9 F)
1955	-39.2 C (-38.6 F)
1956	-35.7 C (-32.3 F)
1957	-44.8 C (-48.6 F)
1958	-46.7 C (-52.1 F)
1959	-38.2 C (-36.8 F)
1960	-41.3 C (-42.3 F)
1961	-40.3 C (-40.5 F)
1962	-31.7 C (-25.1 F)
1963	-35.0 C (-31.0 F)
1964	-31.9 C (-25.4 F)
1965	-41.3 C (-42.3 F)
1966	-45.8 C (-50.4 F)
1967	-37.8 C (-36.0 F)
1968	-44.3 C (-47.7 F)
1969	-44.9 C (-48.8 F)
1970	-37.2 C (-35.0 F)
1971	-38.5 C (-37.3 F)
1972	-44.7 C (-48.5 F)
1973	-43.8 C (-46.8 F)
1974	-39.5 C (-39.1 F)
1975	-38.2 C (-36.8 F)
1976	-44.0 C (-47.2 F)
1977	-42.3 C (-44.1 F)
1978	-38.4 C (-37.1 F)
1979	-44.3 C (-47.7 F)
1980	-35.7 C (-32.3 F)
1981	-32.3 C (-26.1 F)
1982	-37.4 C (-35.3 F)
1983	-27.1 C (-16.8 F)
1984	-46.4 C (-51.5 F)
1985	-33.7 C (-28.7 F)
1986	-38.3 C (-36.9 F)
1987	-40.9 C (-41.6 F)
1988	-35.7 C (-32.3 F)
1989	-31.6 C (-24.9 F)
1990	-37.4 C (-35.3 F)
1991	-39.9 C (-39.8 F)
1992	-31.7 C (-25.1 F)
1993	-35.5 C (-31.9 F)
1994	-34.0 C (-29.2 F)
1995	-33.2 C (-27.8 F)
1996	-38.8 C (-37.8 F)
1997	-38.7 C (-37.7 F)
1998	-39.1 C (-38.4 F)
1999	-41.4 C (-42.5 F)
2000	-43.6 C (-46.5 F)
2001	-45.0 C (-49.0 F)
2002	-39.5 C (-39.1 F)
2003	-35.1 C (-31.2 F)
2004	-33.9 C (-29.0 F)
2005	-34.1 C (-29.4 F)
2006	-44.5 C (-48.1 F)
2007	-30.5 C (-22.9 F)
2008	-39.7 C (-39.5 F)
2009	-40.8 C (-41.4 F)
2010	-39.9 C (-39.8 F)
2011	-36.4 C (-33.5 F)
2012	-41.3 C (-42.3 F)
2013	-32.1 C (-25.8 F)
2014	-35.6 C (-32.1 F)
2015	-34.9 C (-30.8 F)
2016	-38.8 C (-37.8 F)
2017	-33.2 C (-27.8 F)
2018	-38.7 C (-37.7 F)
2019	-40.4 C (-40.7 F)

Wettest day (Rx1day)

The wettest day of the year at Bolotnoe, 1936 to 2019. The record is 100.6 mm (4.0 in) in 1991, marked on the chart; the median year is 28.0 mm (1.1 in).

Wettest day (Rx1day) at Bolotnoe by year
Year	Wettest day (Rx1day)
1936	23.0 mm (0.9 in)
1937	28.2 mm (1.1 in)
1938	25.7 mm (1.0 in)
1939	20.3 mm (0.8 in)
1940	29.6 mm (1.2 in)
1941	20.9 mm (0.8 in)
1942	43.9 mm (1.7 in)
1943	16.5 mm (0.6 in)
1944	27.4 mm (1.1 in)
1945	36.8 mm (1.4 in)
1946	20.7 mm (0.8 in)
1947	30.9 mm (1.2 in)
1948	35.9 mm (1.4 in)
1949	38.7 mm (1.5 in)
1950	22.6 mm (0.9 in)
1951	26.9 mm (1.1 in)
1952	15.0 mm (0.6 in)
1953	29.6 mm (1.2 in)
1954	43.5 mm (1.7 in)
1955	32.0 mm (1.3 in)
1956	25.8 mm (1.0 in)
1957	21.0 mm (0.8 in)
1958	24.6 mm (1.0 in)
1959	47.3 mm (1.9 in)
1960	28.9 mm (1.1 in)
1961	29.7 mm (1.2 in)
1962	63.7 mm (2.5 in)
1963	29.8 mm (1.2 in)
1964	17.5 mm (0.7 in)
1965	20.1 mm (0.8 in)
1966	16.2 mm (0.6 in)
1967	41.2 mm (1.6 in)
1968	17.1 mm (0.7 in)
1969	28.6 mm (1.1 in)
1970	38.7 mm (1.5 in)
1971	19.5 mm (0.8 in)
1972	38.3 mm (1.5 in)
1973	31.9 mm (1.3 in)
1974	29.2 mm (1.1 in)
1975	14.0 mm (0.6 in)
1976	35.4 mm (1.4 in)
1977	26.7 mm (1.1 in)
1978	27.1 mm (1.1 in)
1979	19.8 mm (0.8 in)
1980	16.3 mm (0.6 in)
1981	17.8 mm (0.7 in)
1982	51.8 mm (2.0 in)
1983	35.6 mm (1.4 in)
1984	28.3 mm (1.1 in)
1985	21.1 mm (0.8 in)
1986	21.2 mm (0.8 in)
1987	30.0 mm (1.2 in)
1988	51.8 mm (2.0 in)
1989	10.5 mm (0.4 in)
1990	53.0 mm (2.1 in)
1991	100.6 mm (4.0 in)
1992	15.6 mm (0.6 in)
1993	30.5 mm (1.2 in)
1994	21.3 mm (0.8 in)
1995	23.0 mm (0.9 in)
1996	62.1 mm (2.4 in)
1997	28.4 mm (1.1 in)
1998	35.0 mm (1.4 in)
1999	17.2 mm (0.7 in)
2000	22.9 mm (0.9 in)
2001	20.1 mm (0.8 in)
2002	46.1 mm (1.8 in)
2003	24.0 mm (0.9 in)
2004	17.0 mm (0.7 in)
2005	27.7 mm (1.1 in)
2006	30.9 mm (1.2 in)
2007	21.4 mm (0.8 in)
2008	31.4 mm (1.2 in)
2009	22.7 mm (0.9 in)
2010	20.8 mm (0.8 in)
2011	13.8 mm (0.5 in)
2012	22.1 mm (0.9 in)
2013	29.5 mm (1.2 in)
2014	47.8 mm (1.9 in)
2015	44.8 mm (1.8 in)
2016	31.0 mm (1.2 in)
2017	29.4 mm (1.2 in)
2018	35.5 mm (1.4 in)
2019	9.4 mm (0.37 in)

Wettest five days (Rx5day)

The wettest five days of the year at Bolotnoe, 1936 to 2019. The record is 135.8 mm (5.3 in) in 1991, marked on the chart; the median year is 43.5 mm (1.7 in).

Wettest five days (Rx5day) at Bolotnoe by year
Year	Wettest five days (Rx5day)
1936	36.4 mm (1.4 in)
1937	37.2 mm (1.5 in)
1938	48.5 mm (1.9 in)
1939	41.4 mm (1.6 in)
1940	44.8 mm (1.8 in)
1941	43.0 mm (1.7 in)
1942	80.9 mm (3.2 in)
1943	43.3 mm (1.7 in)
1944	36.4 mm (1.4 in)
1945	57.1 mm (2.2 in)
1946	45.5 mm (1.8 in)
1947	54.8 mm (2.2 in)
1948	47.2 mm (1.9 in)
1949	50.5 mm (2.0 in)
1950	45.2 mm (1.8 in)
1951	28.9 mm (1.1 in)
1952	27.7 mm (1.1 in)
1953	56.5 mm (2.2 in)
1954	59.6 mm (2.3 in)
1955	51.9 mm (2.0 in)
1956	40.3 mm (1.6 in)
1957	48.8 mm (1.9 in)
1958	42.3 mm (1.7 in)
1959	49.8 mm (2.0 in)
1960	46.7 mm (1.8 in)
1961	32.0 mm (1.3 in)
1962	73.8 mm (2.9 in)
1963	53.2 mm (2.1 in)
1964	27.4 mm (1.1 in)
1965	40.4 mm (1.6 in)
1966	26.7 mm (1.1 in)
1967	62.7 mm (2.5 in)
1968	36.7 mm (1.4 in)
1969	48.1 mm (1.9 in)
1970	68.4 mm (2.7 in)
1971	29.3 mm (1.2 in)
1972	54.5 mm (2.1 in)
1973	53.7 mm (2.1 in)
1974	39.4 mm (1.6 in)
1975	24.2 mm (1.0 in)
1976	74.3 mm (2.9 in)
1977	49.5 mm (1.9 in)
1978	55.2 mm (2.2 in)
1979	37.4 mm (1.5 in)
1980	24.8 mm (1.0 in)
1981	27.1 mm (1.1 in)
1982	55.0 mm (2.2 in)
1983	44.2 mm (1.7 in)
1984	74.2 mm (2.9 in)
1985	42.2 mm (1.7 in)
1986	39.1 mm (1.5 in)
1987	42.0 mm (1.7 in)
1988	74.7 mm (2.9 in)
1989	26.7 mm (1.1 in)
1990	100.2 mm (3.9 in)
1991	135.8 mm (5.3 in)
1992	31.6 mm (1.2 in)
1993	43.5 mm (1.7 in)
1994	43.1 mm (1.7 in)
1995	36.3 mm (1.4 in)
1996	103.8 mm (4.1 in)
1997	35.6 mm (1.4 in)
1998	42.1 mm (1.7 in)
1999	29.0 mm (1.1 in)
2000	40.4 mm (1.6 in)
2001	29.9 mm (1.2 in)
2002	64.0 mm (2.5 in)
2003	43.5 mm (1.7 in)
2004	45.8 mm (1.8 in)
2005	35.1 mm (1.4 in)
2006	53.4 mm (2.1 in)
2007	32.1 mm (1.3 in)
2008	59.1 mm (2.3 in)
2009	49.2 mm (1.9 in)
2010	34.0 mm (1.3 in)
2011	33.0 mm (1.3 in)
2012	45.4 mm (1.8 in)
2013	32.0 mm (1.3 in)
2014	55.8 mm (2.2 in)
2015	58.6 mm (2.3 in)
2016	42.3 mm (1.7 in)
2017	41.8 mm (1.6 in)
2018	60.7 mm (2.4 in)
2019	17.7 mm (0.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Bolotnoe, 1936 to 2019. The record is 59 days in 1962, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Bolotnoe by year
Year	Longest dry spell (CDD)
1936	28 days
1937	14 days
1938	23 days
1939	20 days
1940	25 days
1941	21 days
1942	31 days
1943	18 days
1944	30 days
1945	20 days
1946	19 days
1947	20 days
1948	17 days
1949	19 days
1950	12 days
1951	20 days
1952	27 days
1953	32 days
1954	26 days
1955	29 days
1956	26 days
1957	30 days
1958	16 days
1959	19 days
1960	23 days
1961	24 days
1962	59 days
1963	16 days
1964	33 days
1965	24 days
1966	16 days
1967	34 days
1968	27 days
1969	30 days
1970	19 days
1971	27 days
1972	16 days
1973	19 days
1974	23 days
1975	19 days
1976	24 days
1977	19 days
1978	24 days
1979	13 days
1980	35 days
1981	18 days
1982	19 days
1983	27 days
1984	16 days
1985	23 days
1986	23 days
1987	22 days
1988	24 days
1989	36 days
1990	21 days
1991	22 days
1992	14 days
1993	16 days
1994	27 days
1995	29 days
1996	30 days
1997	20 days
1998	27 days
1999	16 days
2000	21 days
2001	12 days
2002	14 days
2003	22 days
2004	19 days
2005	17 days
2006	21 days
2007	14 days
2008	17 days
2009	18 days
2010	34 days
2011	20 days
2012	28 days
2013	16 days
2014	20 days
2015	17 days
2016	21 days
2017	22 days
2018	18 days
2019	14 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

83 years with a frost

Across 83 years with a frost, the median last spring frost at Bolotnoe falls on 21 May and the median first autumn frost on 21 September, which leaves a median of 121 days between them.

In 1989 to 2018 the median growing season was 123 days. That is 2 days fewer than in 1936 to 1965.

Fitted over all years, the growing season changes by -0.5 days per decade at this station.

Frost dates and growing season at Bolotnoe
Measure	Median, all years	Earliest period (1936 to 1965)	Recent period (1989 to 2018)	Recent against earliest	Fitted trend
Last spring frost	21 May	22 May	20 May	2 days earlier	-0.2 days per decade
First autumn frost	21 September	24 September	18 September	6 days earlier	-0.7 days per decade
Growing days	121 days	125 days	123 days	2 days fewer	-0.5 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

83 years, 1936 to 2018

A day with at least 26.7 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 78.4 mm (3.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Bolotnoe: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	26.7 mm (1.1 in)
5 years	37.5 mm (1.5 in)
10 years	45.8 mm (1.8 in)
25 years	57.6 mm (2.3 in)
50 years	67.5 mm (2.7 in)
100 years	78.4 mm (3.1 in)	Longer than the 83 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, 83 years of values from 1936 to 2018.

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: 100.6 mm (4.0 in) in 1991; 63.7 mm (2.5 in) in 1962; 62.1 mm (2.4 in) in 1996.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Bolotnoe, at 1957. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1957 ran 0.3 C (0.6 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Bolotnoe, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1957	-0.3	-0.6	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2004 to 2018 against 1961 to 1990

Over 2004 to 2018, Bolotnoe had a mean temperature of 1.8 C (35.3 F) and 556.1 mm (21.9 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Tyumen Amsg (Russia, 1,170 km away), Kuzedeevo (Russia, 320 km away) and Turinsk (Russia, 1,281 km away).

Climate twins of Bolotnoe: stations whose 1961 to 1990 climate is closest to its 2004 to 2018 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
Tyumen Amsg	Russia	1,170 km (727 mi)	1.6 C (34.8 F)	465.5 mm (18.3 in)	0.98
Kuzedeevo	Russia	320 km (199 mi)	1.8 C (35.2 F)	655.4 mm (25.8 in)	1.06
Turinsk	Russia	1,281 km (796 mi)	1.2 C (34.2 F)	494.6 mm (19.5 in)	1.07

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Bolotnoe standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bolotnoe 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).