Man Threshold Days by Year (IV000005548)

9 fixed thresholds counted per year at Man (IV000005548): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Man Thresholds

Man: nights with a minimum temperature at or above 20 C (68 F) in 36 years, most in 1980 with 289.
Man: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1952 with 68.
Man: days with 25 mm (0.98 in) or more of precipitation in 35 years, most in 1952 with 27.
Man: days with a maximum temperature at or above 30 C (86 F) in 34 years, most in 1948 with 251.
9 fixed thresholds have at least one qualifying day at Man.

Days at or above 30 C (86 F)

34 years with a qualifying day

Days per year at Man with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 251 in 1948.

Days at or above 30 C (86 F) per year at Man
Year	Days	Decade average
1945	234	243.3
1947	245	243.3
1948	251	243.3
1950	155	171.5
1951	141	171.5
1952	122	171.5
1953	138	171.5
1954	104	171.5
1955	199	171.5
1956	196	171.5
1957	202	171.5
1958	216	171.5
1959	242	171.5
1960	238	206.7
1961	231	206.7
1962	185	206.7
1963	224	206.7
1964	180	206.7
1965	207	206.7
1967	200	206.7
1968	193	206.7
1969	202	206.7
1970	229	213.3
1971	196	213.3
1972	226	213.3
1973	250	213.3
1974	232	213.3
1975	214	213.3
1976	165	213.3
1977	217	213.3
1978	194	213.3
1979	210	213.3
1980	218	218
2025	146	146

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

First to last qualifying date each year at Man
Year	First date	Last date
1945	1945-01-01	1945-12-31
1947	1947-01-01	1947-12-31
1948	1948-01-01	1948-12-31
1950	1950-01-01	1950-12-30
1951	1951-01-01	1951-12-31
1952	1952-01-01	1952-12-26
1953	1953-01-01	1953-12-31
1954	1954-01-01	1954-12-30
1955	1955-01-01	1955-12-31
1956	1956-01-01	1956-12-31
1957	1957-01-01	1957-12-31
1958	1958-01-01	1958-12-31
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	1964-12-30
1965	1965-01-02	1965-12-31
1967	1967-01-02	1967-12-31
1968	1968-01-01	1968-12-30
1969	1969-01-02	1969-12-30
1970	1970-01-01	1970-12-30
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
2025	2025-01-01	2025-08-23

Every Fixed Threshold

Fixed thresholds at Man
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	34	251	1948	146
35 C (95 F): Days	28	36	1961	39
90 F (32.2 C): Days	34	122	1961	110
100 F (37.8 C): Days	2	1	1980	1
20 C (68 F): Tropical nights (min	36	289	1980	155
10 mm (0.39 in): Days with 10 mm or more rain	35	68	1952	15
25 mm (0.98 in): Days with 25 mm or more rain	35	27	1952	4
50 mm (1.97 in): Days with 50 mm or more rain	31	10	1977	1
100 mm (3.94 in): Days with 100 mm or more rain	9	3	1947	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1945.

Download the Data

Data for Man 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).

Man Threshold Days by Year (IV000005548)

Key Facts for Man Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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