Bolotnoe Threshold Days by Year (RSM00029539)

14 fixed thresholds counted per year at Bolotnoe (RSM00029539): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bolotnoe Thresholds

Bolotnoe: days with a maximum temperature at or below 0 C (32 F) in 83 years, most in 1952 with 167.
Bolotnoe: nights with a minimum temperature at or below 0 C (32 F) in 83 years, most in 1941 with 216.
Bolotnoe: nights with a minimum temperature at or below -10 C (14 F) in 83 years, most in 1952 with 155.
Bolotnoe: nights with a minimum temperature at or below -20 C (-4 F) in 83 years, most in 1966 with 87.
14 fixed thresholds have at least one qualifying day at Bolotnoe.

Days at or above 30 C (86 F)

78 years with a qualifying day

Days per year at Bolotnoe with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 22 in 1953.

Days at or above 30 C (86 F) per year at Bolotnoe
Year	Days	Decade average
1936	5	2.5
1937	2	2.5
1938	1	2.5
1939	2	2.5
1940	11	5
1941	1	5
1942	9	5
1943	9	5
1944	4	5
1945	1	5
1946	6	5
1947	2	5
1948	4	5
1949	3	5
1950	3	9.4
1951	15	9.4
1952	16	9.4
1953	22	9.4
1955	17	9.4
1956	5	9.4
1957	3	9.4
1958	3	9.4
1959	1	9.4
1961	4	8.8
1962	7	8.8
1963	4	8.8
1964	1	8.8
1965	20	8.8
1966	3	8.8
1967	6	8.8
1968	12	8.8
1969	22	8.8
1970	5	5.6
1971	6	5.6
1972	1	5.6
1973	4	5.6
1974	5	5.6
1975	8	5.6
1976	5	5.6
1977	12	5.6
1978	3	5.6
1979	7	5.6
1980	11	7.4
1981	4	7.4
1982	14	7.4
1983	13	7.4
1984	2	7.4
1986	6	7.4
1987	3	7.4
1988	2	7.4
1989	12	7.4
1990	5	7.8
1991	9	7.8
1992	8	7.8
1993	1	7.8
1994	11	7.8
1995	3	7.8
1996	2	7.8
1997	9	7.8
1998	14	7.8
1999	16	7.8
2000	4	5.9
2001	7	5.9
2002	5	5.9
2003	5	5.9
2004	10	5.9
2005	7	5.9
2006	7	5.9
2007	4	5.9
2008	4	5.9
2010	9	7.9
2011	5	7.9
2012	20	7.9
2014	12	7.9
2015	5	7.9
2016	3	7.9
2017	6	7.9
2018	3	7.9

For each year, a bar from the first to the last day at Bolotnoe meeting 30 C (86 F).

First to last qualifying date each year at Bolotnoe
Year	First date	Last date
1936	1936-06-29	1936-07-27
1937	1937-07-09	1937-07-11
1938	1938-07-14	1938-07-14
1939	1939-06-06	1939-06-07
1940	1940-06-13	1940-08-01
1941	1941-06-24	1941-06-24
1942	1942-06-07	1942-08-03
1943	1943-05-27	1943-08-04
1944	1944-06-27	1944-08-08
1945	1945-06-15	1945-06-15
1946	1946-07-08	1946-07-15
1947	1947-06-09	1947-07-10
1948	1948-07-06	1948-07-30
1949	1949-06-26	1949-06-29
1950	1950-06-06	1950-07-19
1951	1951-05-26	1951-07-30
1952	1952-05-30	1952-09-02
1953	1953-05-23	1953-09-17
1955	1955-05-27	1955-08-08
1956	1956-07-04	1956-08-13
1957	1957-06-23	1957-07-06
1958	1958-06-23	1958-07-12
1959	1959-05-25	1959-05-25
1961	1961-06-27	1961-07-05
1962	1962-06-23	1962-08-25
1963	1963-06-23	1963-07-09
1964	1964-07-13	1964-07-13
1965	1965-05-15	1965-08-09
1966	1966-06-04	1966-09-01
1967	1967-06-06	1967-07-22
1968	1968-05-23	1968-08-10
1969	1969-06-14	1969-07-31
1970	1970-06-18	1970-07-13
1971	1971-05-26	1971-06-24
1972	1972-08-02	1972-08-02
1973	1973-06-02	1973-07-12
1974	1974-06-29	1974-08-03
1975	1975-05-29	1975-07-29
1976	1976-06-06	1976-06-10
1977	1977-06-03	1977-07-20
1978	1978-06-18	1978-06-20
1979	1979-06-21	1979-07-29
1980	1980-05-25	1980-08-22
1981	1981-06-19	1981-06-22
1982	1982-05-18	1982-08-08
1983	1983-06-08	1983-07-21
1984	1984-06-25	1984-06-26
1986	1986-07-01	1986-07-30
1987	1987-07-11	1987-07-16
1988	1988-06-16	1988-06-17
1989	1989-07-02	1989-08-30
1990	1990-05-22	1990-07-12
1991	1991-05-13	1991-08-10
1992	1992-05-19	1992-08-13
1993	1993-07-11	1993-07-11
1994	1994-06-06	1994-07-05
1995	1995-07-03	1995-08-16
1996	1996-07-10	1996-07-18
1997	1997-05-27	1997-08-17
1998	1998-06-02	1998-08-16
1999	1999-05-22	1999-08-19
2000	2000-07-06	2000-08-08
2001	2001-05-09	2001-08-18
2002	2002-05-22	2002-08-12
2003	2003-06-07	2003-07-09
2004	2004-05-15	2004-08-15
2005	2005-06-23	2005-08-22
2006	2006-06-08	2006-07-05
2007	2007-07-07	2007-07-20
2008	2008-05-10	2008-07-19
2010	2010-06-15	2010-09-02
2011	2011-05-31	2011-08-01
2012	2012-06-01	2012-07-31
2014	2014-06-16	2014-08-20
2015	2015-06-30	2015-07-19
2016	2016-06-12	2016-06-27
2017	2017-06-16	2017-08-05
2018	2018-06-18	2018-07-13

Every Fixed Threshold

Fixed thresholds at Bolotnoe
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	78	22	1953	3
35 C (95 F): Days	9	2	1953	1
90 F (32.2 C): Days	46	9	1953	1
0 C (32 F): Ice days (max	83	167	1952	139
0 C (32 F): Frost days (min	83	216	1941	196
-10 C (14 F): Days with min	83	155	1952	127
-20 C (-4 F): Days with min	83	87	1966	71
-30 C (-22 F): Days with min	82	38	2010	20
-40 C (-40 F): Days with min	29	12	1969	3
20 C (68 F): Tropical nights (min	15	5	1953	1
10 mm (0.39 in): Days with 10 mm or more rain	83	16	1946	15
25 mm (0.98 in): Days with 25 mm or more rain	49	4	1947	2
50 mm (1.97 in): Days with 50 mm or more rain	6	2	1996	2
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1991	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1936.

Download the Data

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Bolotnoe Threshold Days by Year (RSM00029539)

Key Facts for Bolotnoe Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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