Calera Threshold Days by Year (USC00011288)

16 fixed thresholds counted per year at Calera (USC00011288): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Calera Thresholds

Calera: days with 10 mm (0.39 in) or more of precipitation in 106 years, most in 1929 with 66.
Calera: days with 25 mm (0.98 in) or more of precipitation in 106 years, most in 1975 with 29.
Calera: days with 50 mm (1.97 in) or more of precipitation in 104 years, most in 1912 with 10.
Calera: days with 100 mm (3.94 in) or more of precipitation in 38 years, most in 1995 with 4.
16 fixed thresholds have at least one qualifying day at Calera.

Days at or above 30 C (86 F)

21 years with a qualifying day

Days per year at Calera with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 137 in 1962.

Days at or above 30 C (86 F) per year at Calera
Year	Days	Decade average
1956	121	119.5
1957	123	119.5
1958	113	119.5
1959	121	119.5
1960	96	111.3
1961	111	111.3
1962	137	111.3
1963	106	111.3
1964	114	111.3
1965	110	111.3
1966	98	111.3
1967	96	111.3
1968	125	111.3
1969	120	111.3
1970	130	113.7
1972	117	113.7
1973	133	113.7
1974	71	113.7
1975	113	113.7
1978	118	113.7
1980	92	92

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

First to last qualifying date each year at Calera
Year	First date	Last date
1956	1956-04-29	1956-10-06
1957	1957-04-22	1957-09-22
1958	1958-04-18	1958-10-09
1959	1959-05-01	1959-10-13
1960	1960-04-22	1960-09-07
1961	1961-05-05	1961-10-31
1962	1962-04-29	1962-10-17
1963	1963-03-31	1963-10-21
1964	1964-04-24	1964-10-01
1965	1965-04-09	1965-10-17
1966	1966-04-13	1966-09-26
1967	1967-04-05	1967-10-15
1968	1968-04-19	1968-10-15
1969	1969-05-07	1969-10-13
1970	1970-04-22	1970-10-11
1972	1972-04-14	1972-10-14
1973	1973-05-10	1973-10-21
1974	1974-03-10	1974-11-02
1975	1975-04-27	1975-10-14
1978	1978-04-05	1978-09-23
1980	1980-04-22	1980-10-09

Every Fixed Threshold

Fixed thresholds at Calera
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	21	137	1962	92
35 C (95 F): Days	21	45	1956	43
40 C (104 F): Days	3	1	1966	3
90 F (32.2 C): Days	21	109	1962	69
100 F (37.8 C): Days	12	6	1966	15
0 C (32 F): Ice days (max	9	3	1962	1
0 C (32 F): Frost days (min	21	84	1963	75
-10 C (14 F): Days with min	18	12	1963	7
-20 C (-4 F): Days with min	1	0	n/a	1
20 C (68 F): Tropical nights (min	21	72	1973	23
25 C (77 F): Days with min	6	3	1960	1
10 mm (0.39 in): Days with 10 mm or more rain	106	66	1929	33
25 mm (0.98 in): Days with 25 mm or more rain	106	29	1975	14
50 mm (1.97 in): Days with 50 mm or more rain	104	10	1912	3
100 mm (3.94 in): Days with 100 mm or more rain	38	4	1995	1
10 cm (3.9 in): Days with 10 cm or more snowfall	5	1	1924	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1956.

Download the Data

Data for Calera 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).

Calera Threshold Days by Year (USC00011288)

Key Facts for Calera Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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