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Built 2026-10-17 (17 October 2026)

Palmerston Threshold Days by Year

10 fixed thresholds counted per year at Palmerston (ASN00093027): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Palmerston Thresholds

  • Palmerston: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1975 with 45.
  • Palmerston: days with 25 mm (0.98 in) or more of precipitation in 29 years, most in 1974 with 11.
  • Palmerston: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1982 with 16.
  • Palmerston: nights with a minimum temperature at or below 0 C (32 F) in 28 years, most in 1972 with 85.
  • 10 fixed thresholds have at least one qualifying day at Palmerston.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at Palmerston Days per year at Palmerston with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 16 in 1982. 051015201965: 111966: 81967: 81968: 121969: 41970: 11971: 41972: 61973: 51974: 71975: 51976: 41977: 31978: 51979: 61980: 81981: 101982: 161983: 141984: 11985: 41986: 11987: 81988: 151989: 101990: 71991: 61992: 21965196819711974197719801983198619891992
Days per year at Palmerston with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 16 in 1982.
Days at or above 30 C (86 F) per year at Palmerston
YearDaysDecade average
1965118.6
196688.6
196788.6
1968128.6
196948.6
197014.6
197144.6
197264.6
197354.6
197474.6
197554.6
197644.6
197734.6
197854.6
197964.6
198088.7
1981108.7
1982168.7
1983148.7
198418.7
198548.7
198618.7
198788.7
1988158.7
1989108.7
199075
199165
199225
First to last qualifying date each year at Palmerston For each year, a bar from the first to the last day at Palmerston meeting 30 C (86 F). 1965: 16 January 1965 to 23 December 19651966: 10 January 1966 to 23 November 19661967: 4 February 1967 to 16 March 19671968: 8 January 1968 to 25 February 19681969: 7 January 1969 to 20 February 19691970: 9 February 1970 to 9 February 19701971: 8 January 1971 to 19 February 19711972: 1 February 1972 to 21 December 19721973: 2 January 1973 to 18 February 19731974: 25 January 1974 to 3 March 19741975: 6 February 1975 to 12 December 19751976: 3 January 1976 to 22 December 19761977: 11 February 1977 to 17 February 19771978: 1 January 1978 to 11 March 19781979: 1 February 1979 to 30 December 19791980: 12 February 1980 to 22 December 19801981: 1 January 1981 to 15 February 19811982: 9 January 1982 to 23 December 19821983: 1 January 1983 to 31 December 19831984: 27 February 1984 to 27 February 19841985: 14 January 1985 to 15 March 19851986: 7 March 1986 to 7 March 19861987: 7 February 1987 to 2 November 19871988: 5 January 1988 to 24 December 19881989: 27 January 1989 to 25 December 19891990: 12 January 1990 to 5 December 19901991: 3 January 1991 to 7 March 19911992: 20 January 1992 to 10 March 19921965196919731977198119851989JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Palmerston meeting 30 C (86 F).
First to last qualifying date each year at Palmerston
YearFirst dateLast date
19651965-01-161965-12-23
19661966-01-101966-11-23
19671967-02-041967-03-16
19681968-01-081968-02-25
19691969-01-071969-02-20
19701970-02-091970-02-09
19711971-01-081971-02-19
19721972-02-011972-12-21
19731973-01-021973-02-18
19741974-01-251974-03-03
19751975-02-061975-12-12
19761976-01-031976-12-22
19771977-02-111977-02-17
19781978-01-011978-03-11
19791979-02-011979-12-30
19801980-02-121980-12-22
19811981-01-011981-02-15
19821982-01-091982-12-23
19831983-01-011983-12-31
19841984-02-271984-02-27
19851985-01-141985-03-15
19861986-03-071986-03-07
19871987-02-071987-11-02
19881988-01-051988-12-24
19891989-01-271989-12-25
19901990-01-121990-12-05
19911991-01-031991-03-07
19921992-01-201992-03-10

Every Fixed Threshold

Fixed thresholds at Palmerston
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days281619822
35 C (95 F): Days10519821
90 F (32.2 C): Days22819683
100 F (37.8 C): Days2119681
0 C (32 F): Frost days (min2885197251
-10 C (14 F): Days with min1119721
20 C (68 F): Tropical nights (min1119681
10 mm (0.39 in): Days with 10 mm or more rain2945197529
25 mm (0.98 in): Days with 25 mm or more rain291119747
50 mm (1.97 in): Days with 50 mm or more rain16319731

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.

Download the Data

  • Data for Palmerston 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-16).