Ersov Threshold Days by Year (RSM00034186)

15 fixed thresholds counted per year at Ersov (RSM00034186): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ersov Thresholds

Ersov: days with 10 mm (0.39 in) or more of precipitation in 65 years, most in 1987 with 15.
Ersov: days with a maximum temperature at or above 30 C (86 F) in 64 years, most in 2010 with 77.
Ersov: days with a maximum temperature at or below 0 C (32 F) in 64 years, most in 1976 with 136.
Ersov: days with a maximum temperature at or above 90 F (32.2 C) in 63 years, most in 2010 with 61.
15 fixed thresholds have at least one qualifying day at Ersov.

Days at or above 30 C (86 F)

64 years with a qualifying day

Days per year at Ersov with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 77 in 2010.

Days at or above 30 C (86 F) per year at Ersov
Year	Days	Decade average
1951	53	37.5
1952	34	37.5
1953	34	37.5
1955	34	37.5
1956	23	37.5
1957	69	37.5
1958	23	37.5
1959	30	37.5
1960	37	24.6
1962	31	24.6
1963	22	24.6
1964	6	24.6
1965	29	24.6
1967	30	24.6
1968	16	24.6
1969	26	24.6
1970	25	32.4
1971	43	32.4
1972	60	32.4
1973	11	32.4
1975	55	32.4
1976	12	32.4
1977	41	32.4
1978	7	32.4
1979	38	32.4
1980	14	32.7
1981	50	32.7
1982	30	32.7
1983	21	32.7
1984	40	32.7
1985	25	32.7
1986	35	32.7
1987	33	32.7
1988	48	32.7
1989	31	32.7
1990	9	32.5
1991	31	32.5
1992	26	32.5
1993	20	32.5
1994	17	32.5
1995	59	32.5
1996	51	32.5
1997	27	32.5
1998	52	32.5
1999	33	32.5
2000	31	37.3
2001	33	37.3
2002	35	37.3
2003	18	37.3
2004	32	37.3
2005	39	37.3
2006	43	37.3
2007	61	37.3
2008	41	37.3
2009	40	37.3
2010	77	53
2011	47	53
2012	52	53
2013	42	53
2014	47	53
2015	55	53
2016	55	53
2017	44	53
2018	58	53

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

First to last qualifying date each year at Ersov
Year	First date	Last date
1951	1951-06-09	1951-09-05
1952	1952-06-22	1952-09-13
1953	1953-05-18	1953-08-31
1955	1955-05-16	1955-08-21
1956	1956-06-05	1956-09-01
1957	1957-05-07	1957-09-18
1958	1958-05-28	1958-08-31
1959	1959-05-12	1959-08-07
1960	1960-06-11	1960-09-08
1962	1962-05-30	1962-09-10
1963	1963-07-09	1963-09-09
1964	1964-07-16	1964-08-05
1965	1965-05-31	1965-09-09
1967	1967-05-10	1967-08-29
1968	1968-05-12	1968-08-27
1969	1969-06-04	1969-09-02
1970	1970-05-03	1970-08-14
1971	1971-05-24	1971-09-21
1972	1972-05-30	1972-09-02
1973	1973-06-11	1973-08-11
1975	1975-05-14	1975-08-28
1976	1976-06-03	1976-08-23
1977	1977-05-14	1977-09-11
1978	1978-07-24	1978-08-28
1979	1979-05-19	1979-09-01
1980	1980-06-03	1980-07-26
1981	1981-06-09	1981-08-27
1982	1982-06-15	1982-09-08
1983	1983-05-25	1983-08-18
1984	1984-05-11	1984-08-14
1985	1985-05-29	1985-08-20
1986	1986-05-31	1986-09-10
1987	1987-06-10	1987-08-08
1988	1988-06-03	1988-09-01
1989	1989-06-08	1989-09-11
1990	1990-06-03	1990-07-21
1991	1991-05-28	1991-08-21
1992	1992-06-18	1992-09-08
1993	1993-07-08	1993-08-19
1994	1994-05-22	1994-09-23
1995	1995-04-30	1995-09-11
1996	1996-05-07	1996-09-07
1997	1997-06-01	1997-08-29
1998	1998-05-30	1998-08-24
1999	1999-06-08	1999-08-24
2000	2000-06-03	2000-09-08
2001	2001-06-20	2001-08-20
2002	2002-06-15	2002-09-24
2003	2003-05-24	2003-09-03
2004	2004-05-30	2004-09-03
2005	2005-05-21	2005-09-18
2006	2006-06-01	2006-09-03
2007	2007-05-21	2007-09-09
2008	2008-05-21	2008-09-09
2009	2009-06-04	2009-08-19
2010	2010-05-07	2010-09-03
2011	2011-05-31	2011-09-03
2012	2012-05-10	2012-08-30
2013	2013-05-13	2013-08-31
2014	2014-05-14	2014-08-26
2015	2015-05-25	2015-09-24
2016	2016-05-28	2016-08-28
2017	2017-06-27	2017-09-19
2018	2018-05-18	2018-09-15

Every Fixed Threshold

Fixed thresholds at Ersov
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	64	77	2010	58
35 C (95 F): Days	55	38	2010	7
40 C (104 F): Days	9	7	2010	1
90 F (32.2 C): Days	63	61	2010	26
100 F (37.8 C): Days	27	24	2010	1
0 C (32 F): Ice days (max	64	136	1976	127
0 C (32 F): Frost days (min	63	193	1987	164
-10 C (14 F): Days with min	63	120	1987	95
-20 C (-4 F): Days with min	63	60	1969	21
-30 C (-22 F): Days with min	26	10	1972	1
20 C (68 F): Tropical nights (min	55	43	2010	9
25 C (77 F): Days with min	8	2	2010	1
10 mm (0.39 in): Days with 10 mm or more rain	65	15	1987	4
25 mm (0.98 in): Days with 25 mm or more rain	39	4	2000	1
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1990	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

Download the Data

Data for Ersov 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).

Ersov Threshold Days by Year (RSM00034186)

Key Facts for Ersov Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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