Nan Threshold Days by Year

12 fixed thresholds counted per year at Nan (TH000048331): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Nan Thresholds

Nan: days with a maximum temperature at or above 30 C (86 F) in 35 years, most in 1957 with 331.
Nan: days with a maximum temperature at or above 35 C (95 F) in 35 years, most in 1983 with 108.
Nan: days with a maximum temperature at or above 90 F (32.2 C) in 35 years, most in 1959 with 242.
Nan: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1961 with 52.
12 fixed thresholds have at least one qualifying day at Nan.

Days at or above 30 C (86 F)

35 years with a qualifying day

Days per year at Nan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 331 in 1957.

Days at or above 30 C (86 F) per year at Nan
Year	Days	Decade average
1951	286	307.2
1952	306	307.2
1953	305	307.2
1954	329	307.2
1955	293	307.2
1956	298	307.2
1957	331	307.2
1958	298	307.2
1959	319	307.2
1960	306	296.7
1961	301	296.7
1962	299	296.7
1963	269	296.7
1964	285	296.7
1965	298	296.7
1966	329	296.7
1967	267	296.7
1968	331	296.7
1969	282	296.7
1970	289	280.5
1971	254	280.5
1972	291	280.5
1973	280	280.5
1974	278	280.5
1975	288	280.5
1976	262	280.5
1977	264	280.5
1978	286	280.5
1979	313	280.5
1980	320	298
1981	282	298
1982	290	298
1983	291	298
1984	305	298
1985	300	298

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

First to last qualifying date each year at Nan
Year	First date	Last date
1951	1951-01-06	1951-12-31
1952	1952-01-01	1952-12-31
1953	1953-01-03	1953-12-31
1954	1954-01-01	1954-12-31
1955	1955-01-01	1955-12-31
1956	1956-01-01	1956-12-31
1957	1957-01-01	1957-12-30
1958	1958-01-01	1958-12-31
1959	1959-01-01	1959-12-31
1960	1960-01-05	1960-12-24
1961	1961-01-02	1961-12-31
1962	1962-01-07	1962-12-30
1963	1963-01-01	1963-12-10
1964	1964-01-02	1964-11-30
1965	1965-01-06	1965-12-29
1966	1966-01-06	1966-12-31
1967	1967-01-07	1967-12-28
1968	1968-01-07	1968-12-31
1969	1969-01-01	1969-12-31
1970	1970-01-01	1970-12-29
1971	1971-01-14	1971-12-26
1972	1972-01-05	1972-12-31
1973	1973-01-01	1973-12-13
1974	1974-01-14	1974-12-31
1975	1975-01-01	1975-12-10
1976	1976-01-09	1976-12-27
1977	1977-01-25	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-31
1980	1980-01-01	1980-12-29
1981	1981-01-02	1981-12-13
1982	1982-01-13	1982-12-11
1983	1983-01-04	1983-12-23
1984	1984-01-14	1984-12-28
1985	1985-01-01	1985-12-13

Every Fixed Threshold

Fixed thresholds at Nan
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	35	331	1957	300
35 C (95 F): Days	35	108	1983	71
40 C (104 F): Days	21	24	1960	5
90 F (32.2 C): Days	35	242	1959	183
100 F (37.8 C): Days	34	44	1958	28
110 F (43.3 C): Days	1	1	1959	1
20 C (68 F): Tropical nights (min	30	253	1966	226
25 C (77 F): Days with min	29	44	1979	6
10 mm (0.39 in): Days with 10 mm or more rain	35	52	1961	43
25 mm (0.98 in): Days with 25 mm or more rain	35	22	1951	17
50 mm (1.97 in): Days with 50 mm or more rain	35	8	1952	1
100 mm (3.94 in): Days with 100 mm or more rain	6	1	1952	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 Nan 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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

Nan Threshold Days by Year

Key Facts for Nan Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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