Lanzhou Threshold Days by Year (CHM00052889)

13 fixed thresholds counted per year at Lanzhou (CHM00052889): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lanzhou Thresholds

Lanzhou: days with a maximum temperature at or above 30 C (86 F) in 58 years, most in 1997 with 60.
Lanzhou: days with a maximum temperature at or above 90 F (32.2 C) in 58 years, most in 1953 with 34.
Lanzhou: days with a maximum temperature at or below 0 C (32 F) in 58 years, most in 1954 with 46.
Lanzhou: nights with a minimum temperature at or below 0 C (32 F) in 58 years, most in 2004 with 170.
13 fixed thresholds have at least one qualifying day at Lanzhou.

Days at or above 30 C (86 F)

58 years with a qualifying day

Days per year at Lanzhou with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 60 in 1997.

Days at or above 30 C (86 F) per year at Lanzhou
Year	Days	Decade average
1951	47	38.9
1952	44	38.9
1953	58	38.9
1954	44	38.9
1955	46	38.9
1956	26	38.9
1957	34	38.9
1958	27	38.9
1959	24	38.9
1960	38	32.7
1961	44	32.7
1962	36	32.7
1963	46	32.7
1964	17	32.7
1965	30	32.7
1966	40	32.7
1967	19	32.7
1968	18	32.7
1969	39	32.7
1970	28	29.9
1971	37	29.9
1972	41	29.9
1973	31	29.9
1974	40	29.9
1975	35	29.9
1976	12	29.9
1977	30	29.9
1978	31	29.9
1979	14	29.9
1980	34	34.4
1981	43	34.4
1982	43	34.4
1983	30	34.4
1984	29	34.4
1985	32	34.4
1986	27	34.4
1987	40	34.4
1988	37	34.4
1989	29	34.4
1990	44	40.6
1991	54	40.6
1992	20	40.6
1993	27	40.6
1994	40	40.6
1995	35	40.6
1996	34	40.6
1997	60	40.6
1998	55	40.6
1999	37	40.6
2000	52	46.2
2001	57	46.2
2002	58	46.2
2003	38	46.2
2004	25	46.2
2005	35	46.2
2006	52	46.2
2007	49	46.2
2008	50	46.2

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

First to last qualifying date each year at Lanzhou
Year	First date	Last date
1951	1951-05-10	1951-08-13
1952	1952-04-18	1952-09-03
1953	1953-05-06	1953-09-01
1954	1954-05-18	1954-08-30
1955	1955-04-10	1955-08-31
1956	1956-05-19	1956-09-20
1957	1957-06-02	1957-08-24
1958	1958-04-22	1958-08-04
1959	1959-06-06	1959-07-31
1960	1960-05-02	1960-09-20
1961	1961-05-04	1961-08-12
1962	1962-04-20	1962-08-24
1963	1963-05-06	1963-09-12
1964	1964-06-23	1964-08-11
1965	1965-06-11	1965-08-25
1966	1966-05-07	1966-08-28
1967	1967-07-05	1967-08-17
1968	1968-06-02	1968-08-15
1969	1969-04-10	1969-09-15
1970	1970-05-21	1970-08-21
1971	1971-05-20	1971-08-28
1972	1972-04-17	1972-08-21
1973	1973-04-26	1973-08-16
1974	1974-05-27	1974-08-19
1975	1975-06-06	1975-08-23
1976	1976-06-14	1976-08-17
1977	1977-05-26	1977-09-03
1978	1978-04-28	1978-08-22
1979	1979-06-08	1979-08-09
1980	1980-05-19	1980-09-01
1981	1981-05-06	1981-08-13
1982	1982-05-23	1982-08-25
1983	1983-05-09	1983-08-29
1984	1984-04-25	1984-08-15
1985	1985-05-09	1985-08-20
1986	1986-05-08	1986-08-27
1987	1987-05-22	1987-09-01
1988	1988-05-01	1988-08-10
1989	1989-05-30	1989-08-21
1990	1990-05-07	1990-08-23
1991	1991-05-21	1991-09-06
1992	1992-06-04	1992-08-04
1993	1993-04-26	1993-09-04
1994	1994-04-29	1994-09-06
1995	1995-05-11	1995-08-07
1996	1996-05-25	1996-09-13
1997	1997-04-30	1997-09-08
1998	1998-04-20	1998-09-28
1999	1999-04-21	1999-09-07
2000	2000-05-03	2000-08-19
2001	2001-05-05	2001-08-21
2002	2002-04-20	2002-09-01
2003	2003-04-15	2003-09-15
2004	2004-04-27	2004-08-18
2005	2005-06-07	2005-09-09
2006	2006-04-29	2006-08-26
2007	2007-05-09	2007-08-25
2008	2008-04-30	2008-08-25

Every Fixed Threshold

Fixed thresholds at Lanzhou
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	58	60	1997	50
35 C (95 F): Days	33	11	1953	4
90 F (32.2 C): Days	58	34	1953	27
100 F (37.8 C): Days	5	5	2000	1
0 C (32 F): Ice days (max	58	46	1954	37
0 C (32 F): Frost days (min	58	170	2004	105
-10 C (14 F): Days with min	58	83	2005	28
-20 C (-4 F): Days with min	8	5	1964	1
20 C (68 F): Tropical nights (min	56	19	2002	10
25 C (77 F): Days with min	1	1	2000	1
10 mm (0.39 in): Days with 10 mm or more rain	58	17	1978	8
25 mm (0.98 in): Days with 25 mm or more rain	41	4	1951	1
50 mm (1.97 in): Days with 50 mm or more rain	6	1	1951	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 Lanzhou 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).

Lanzhou Threshold Days by Year (CHM00052889)

Key Facts for Lanzhou Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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