Palmyra Threshold Days by Year (SY000040061)

13 fixed thresholds counted per year at Palmyra (SY000040061): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Palmyra Thresholds

Palmyra: days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 1981 with 8.
Palmyra: nights with a minimum temperature at or below 0 C (32 F) in 42 years, most in 1973 with 44.
Palmyra: nights with a minimum temperature at or above 20 C (68 F) in 42 years, most in 1994 with 121.
Palmyra: days with a maximum temperature at or above 30 C (86 F) in 35 years, most in 1989 with 174.
13 fixed thresholds have at least one qualifying day at Palmyra.

Days at or above 30 C (86 F)

35 years with a qualifying day

Days per year at Palmyra with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 174 in 1989.

Days at or above 30 C (86 F) per year at Palmyra
Year	Days	Decade average
1965	146	145
1966	146	145
1967	128	145
1968	150	145
1969	155	145
1970	153	153.6
1971	155	153.6
1972	157	153.6
1973	158	153.6
1974	167	153.6
1975	146	153.6
1976	141	153.6
1977	147	153.6
1978	157	153.6
1979	155	153.6
1980	152	152.2
1981	145	152.2
1982	143	152.2
1983	143	152.2
1984	162	152.2
1985	162	152.2
1986	143	152.2
1987	150	152.2
1988	148	152.2
1989	174	152.2
1990	155	157.4
1991	151	157.4
1992	149	157.4
1993	156	157.4
1994	167	157.4
1995	151	157.4
1996	163	157.4
1997	159	157.4
1998	164	157.4
1999	159	157.4

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

First to last qualifying date each year at Palmyra
Year	First date	Last date
1965	1965-03-07	1965-10-04
1966	1966-04-12	1966-10-06
1967	1967-05-19	1967-10-08
1968	1968-03-12	1968-10-17
1969	1969-04-29	1969-10-14
1970	1970-03-30	1970-10-24
1971	1971-04-27	1971-10-18
1972	1972-04-14	1972-10-25
1973	1973-04-13	1973-10-25
1974	1974-04-26	1974-10-29
1975	1975-03-23	1975-10-25
1976	1976-04-27	1976-10-13
1977	1977-04-04	1977-10-15
1978	1978-04-08	1978-10-17
1979	1979-04-02	1979-10-19
1980	1980-04-08	1980-10-23
1981	1981-04-23	1981-10-27
1982	1982-04-04	1982-10-15
1983	1983-04-29	1983-10-21
1984	1984-03-22	1984-10-14
1985	1985-04-11	1985-10-08
1986	1986-04-27	1986-10-30
1987	1987-04-01	1987-10-14
1988	1988-04-28	1988-10-06
1989	1989-04-01	1989-10-12
1990	1990-04-25	1990-10-31
1991	1991-04-15	1991-10-24
1992	1992-04-11	1992-10-25
1993	1993-04-15	1993-10-26
1994	1994-04-06	1994-10-25
1995	1995-04-27	1995-10-18
1996	1996-04-28	1996-10-21
1997	1997-04-21	1997-10-26
1998	1998-04-10	1998-10-23
1999	1999-04-18	1999-10-23

Every Fixed Threshold

Fixed thresholds at Palmyra
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	35	174	1989	159
35 C (95 F): Days	35	115	1994	93
40 C (104 F): Days	35	49	1998	17
45 C (113 F): Days	3	5	1998	5
90 F (32.2 C): Days	35	146	1989	141
100 F (37.8 C): Days	35	84	1998	49
110 F (43.3 C): Days	13	14	1998	1
0 C (32 F): Frost days (min	42	44	1973	11
20 C (68 F): Tropical nights (min	42	121	1994	92
25 C (77 F): Days with min	34	18	1987	4
10 mm (0.39 in): Days with 10 mm or more rain	46	8	1981	2
25 mm (0.98 in): Days with 25 mm or more rain	15	4	1988	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1979	1

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 Palmyra 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).

Palmyra Threshold Days by Year (SY000040061)

Key Facts for Palmyra Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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