Tongde Threshold Days by Year (CHM00052957)

7 fixed thresholds counted per year at Tongde (CHM00052957): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tongde Thresholds

Tongde: days with 10 mm (0.39 in) or more of precipitation in 44 years, most in 1975 with 18.
Tongde: nights with a minimum temperature at or below 0 C (32 F) in 42 years, most in 1977 with 274.
Tongde: nights with a minimum temperature at or below -10 C (14 F) in 42 years, most in 1980 with 167.
Tongde: nights with a minimum temperature at or below -20 C (-4 F) in 42 years, most in 1963 with 88.
7 fixed thresholds have at least one qualifying day at Tongde.

Nights at or below 0 C (32 F)

42 years with a qualifying day

Days per year at Tongde with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 274 in 1977.

Nights at or below 0 C (32 F) per year at Tongde
Year	Days	Decade average
1955	205	227.5
1956	225	227.5
1957	229	227.5
1959	251	227.5
1960	256	252.2
1961	258	252.2
1962	260	252.2
1963	241	252.2
1964	229	252.2
1965	261	252.2
1966	255	252.2
1967	245	252.2
1968	258	252.2
1969	259	252.2
1970	258	251.4
1971	239	251.4
1972	249	251.4
1973	251	251.4
1974	240	251.4
1975	239	251.4
1976	261	251.4
1977	274	251.4
1978	259	251.4
1979	244	251.4
1980	249	250.4
1981	235	250.4
1982	256	250.4
1983	245	250.4
1984	266	250.4
1985	248	250.4
1986	262	250.4
1987	264	250.4
1988	235	250.4
1989	244	250.4
1990	270	252.6
1991	250	252.6
1992	246	252.6
1993	263	252.6
1994	243	252.6
1995	244	252.6
1996	252	252.6
1997	253	252.6

For each year, a bar from the first to the last day at Tongde meeting 0 C (32 F).

First to last qualifying date each year at Tongde
Year	First date	Last date
1955	1955-01-01	1955-12-31
1956	1956-01-01	1956-12-31
1957	1957-01-01	1957-12-31
1959	1959-01-01	1959-12-31
1960	1960-01-01	1960-12-31
1961	1961-01-01	1961-12-31
1962	1962-01-01	1962-12-31
1963	1963-01-01	1963-12-31
1964	1964-01-01	1964-12-31
1965	1965-01-01	1965-12-31
1966	1966-01-01	1966-12-31
1967	1967-01-01	1967-12-31
1968	1968-01-01	1968-12-31
1969	1969-01-01	1969-12-31
1970	1970-01-01	1970-12-31
1971	1971-01-01	1971-12-31
1972	1972-01-01	1972-12-31
1973	1973-01-01	1973-12-31
1974	1974-01-01	1974-12-31
1975	1975-01-01	1975-12-31
1976	1976-01-01	1976-12-31
1977	1977-01-01	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-31
1980	1980-01-01	1980-12-31
1981	1981-01-01	1981-12-31
1982	1982-01-01	1982-12-31
1983	1983-01-01	1983-12-31
1984	1984-01-01	1984-12-31
1985	1985-01-01	1985-12-31
1986	1986-01-01	1986-12-31
1987	1987-01-01	1987-12-31
1988	1988-01-01	1988-12-31
1989	1989-01-01	1989-12-31
1990	1990-01-01	1990-12-31
1991	1991-01-01	1991-12-31
1992	1992-01-01	1992-12-31
1993	1993-01-01	1993-12-31
1994	1994-01-01	1994-12-31
1995	1995-01-01	1995-12-31
1996	1996-01-01	1996-12-31
1997	1997-01-01	1997-12-31

Every Fixed Threshold

Fixed thresholds at Tongde
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
0 C (32 F): Ice days (max	40	75	1974	28
0 C (32 F): Frost days (min	42	274	1977	253
-10 C (14 F): Days with min	42	167	1980	150
-20 C (-4 F): Days with min	42	88	1963	62
-30 C (-22 F): Days with min	26	8	1995	8
10 mm (0.39 in): Days with 10 mm or more rain	44	18	1975	7
25 mm (0.98 in): Days with 25 mm or more rain	28	3	1989	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

Download the Data

Data for Tongde 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).

Tongde Threshold Days by Year (CHM00052957)

Key Facts for Tongde Thresholds

Nights at or below 0 C (32 F)

Every Fixed Threshold

Download the Data

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