Palmer Threshold Days by Year (CA004025855)

16 fixed thresholds counted per year at Palmer (CA004025855): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Palmer Thresholds

Palmer: days with 10 mm (0.39 in) or more of precipitation in 21 years, most in 1963 with 15.
Palmer: days with 25 mm (0.98 in) or more of precipitation in 18 years, most in 1982 with 5.
Palmer: days with 10 cm (3.9 in) or more of snowfall in 18 years, most in 1983 with 5.
Palmer: days with a maximum temperature at or above 30 C (86 F) in 15 years, most in 1983 with 38.
16 fixed thresholds have at least one qualifying day at Palmer.

Days at or above 30 C (86 F)

15 years with a qualifying day

Days per year at Palmer with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 38 in 1983.

Days at or above 30 C (86 F) per year at Palmer
Year	Days	Decade average
1966	22	23.3
1967	30	23.3
1968	18	23.3
1969	23	23.3
1970	32	20.3
1971	26	20.3
1972	19	20.3
1973	20	20.3
1974	18	20.3
1975	18	20.3
1976	17	20.3
1977	14	20.3
1978	19	20.3
1982	11	24.5
1983	38	24.5

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

First to last qualifying date each year at Palmer
Year	First date	Last date
1966	1966-05-27	1966-09-18
1967	1967-07-14	1967-09-29
1968	1968-06-02	1968-09-11
1969	1969-05-26	1969-09-11
1970	1970-06-03	1970-09-04
1971	1971-05-13	1971-09-11
1972	1972-05-17	1972-08-29
1973	1973-06-13	1973-08-30
1974	1974-06-16	1974-08-06
1975	1975-06-24	1975-09-15
1976	1976-05-28	1976-09-17
1977	1977-04-26	1977-08-24
1978	1978-05-15	1978-09-04
1982	1982-06-21	1982-09-09
1983	1983-06-09	1983-09-26

Every Fixed Threshold

Fixed thresholds at Palmer
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	15	38	1983	38
35 C (95 F): Days	13	10	1983	10
40 C (104 F): Days	1	1	1983	1
90 F (32.2 C): Days	14	18	1970	14
100 F (37.8 C): Days	5	3	1983	3
0 C (32 F): Ice days (max	15	118	1970	100
0 C (32 F): Frost days (min	15	223	1970	205
-10 C (14 F): Days with min	15	122	1970	90
-20 C (-4 F): Days with min	15	69	1978	41
-30 C (-22 F): Days with min	15	26	1982	13
-40 C (-40 F): Days with min	5	4	1969	2
10 mm (0.39 in): Days with 10 mm or more rain	21	15	1963	12
25 mm (0.98 in): Days with 25 mm or more rain	18	5	1982	1
50 mm (1.97 in): Days with 50 mm or more rain	2	2	1978	2
10 cm (3.9 in): Days with 10 cm or more snowfall	18	5	1983	5
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1966	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1966.

Download the Data

Data for Palmer 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Palmer Threshold Days by Year (CA004025855)

Key Facts for Palmer Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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