Zehner Threshold Days by Year (CA004019200)

16 fixed thresholds counted per year at Zehner (CA004019200): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Zehner Thresholds

Zehner: days with 10 mm (0.39 in) or more of precipitation in 21 years, most in 1973 with 17.
Zehner: days with 25 mm (0.98 in) or more of precipitation in 19 years, most in 1963 with 5.
Zehner: days with 10 cm (3.9 in) or more of snowfall in 17 years, most in 1969 with 6.
Zehner: days with 50 mm (1.97 in) or more of precipitation in 6 years, most in 1968 with 1.
16 fixed thresholds have at least one qualifying day at Zehner.

Days with 10 mm (0.39 in) or more of precipitation

21 years with a qualifying day

Days per year at Zehner with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 17 in 1973.

Days with 10 mm (0.39 in) or more of precipitation per year at Zehner
Year	Days	Decade average
1963	11	10.6
1964	9	10.6
1965	14	10.6
1966	7	10.6
1967	14	10.6
1968	5	10.6
1969	14	10.6
1970	15	11.3
1971	6	11.3
1972	8	11.3
1973	17	11.3
1974	14	11.3
1975	13	11.3
1976	11	11.3
1977	10	11.3
1978	12	11.3
1979	7	11.3
1980	5	9.5
1981	11	9.5
1982	9	9.5
1983	13	9.5

For each year, a bar from the first to the last day at Zehner meeting 10 mm (0.39 in).

First to last qualifying date each year at Zehner
Year	First date	Last date
1963	1963-05-12	1963-08-17
1964	1964-01-21	1964-09-25
1965	1965-02-27	1965-12-30
1966	1966-01-06	1966-11-16
1967	1967-01-22	1967-12-17
1968	1968-05-07	1968-09-18
1969	1969-01-11	1969-12-22
1970	1970-02-03	1970-10-28
1971	1971-01-28	1971-10-18
1972	1972-02-27	1972-09-27
1973	1973-03-26	1973-12-12
1974	1974-02-27	1974-12-21
1975	1975-03-26	1975-12-30
1976	1976-03-01	1976-07-24
1977	1977-05-04	1977-12-16
1978	1978-04-11	1978-11-12
1979	1979-04-12	1979-10-20
1980	1980-06-23	1980-08-16
1981	1981-03-30	1981-12-21
1982	1982-05-28	1982-12-02
1983	1983-05-09	1983-09-11

Every Fixed Threshold

Fixed thresholds at Zehner
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	2	18	1983	18
35 C (95 F): Days	1	2	1983	2
90 F (32.2 C): Days	1	5	1983	5
0 C (32 F): Ice days (max	2	134	1982	130
0 C (32 F): Frost days (min	2	206	1983	206
-10 C (14 F): Days with min	2	122	1982	106
-20 C (-4 F): Days with min	2	64	1982	41
-30 C (-22 F): Days with min	2	23	1982	15
-40 C (-40 F): Days with min	1	1	1983	1
20 C (68 F): Tropical nights (min	1	1	1983	1
10 mm (0.39 in): Days with 10 mm or more rain	21	17	1973	13
25 mm (0.98 in): Days with 25 mm or more rain	19	5	1963	2
50 mm (1.97 in): Days with 50 mm or more rain	6	1	1968	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1975	1
10 cm (3.9 in): Days with 10 cm or more snowfall	17	6	1969	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1967	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1982.

Download the Data

Data for Zehner 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).

Zehner Threshold Days by Year (CA004019200)

Key Facts for Zehner Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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