Hamilton A Threshold Days by Year (CA006153194)

14 fixed thresholds counted per year at Hamilton A (CA006153194): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hamilton A Thresholds

Hamilton A: nights with a minimum temperature at or below 0 C (32 F) in 22 years, most in 1978 with 167.
Hamilton A: nights with a minimum temperature at or below -10 C (14 F) in 22 years, most in 1978 with 69.
Hamilton A: nights with a minimum temperature at or below -20 C (-4 F) in 21 years, most in 1979 with 11.
Hamilton A: nights with a minimum temperature at or above 20 C (68 F) in 21 years, most in 1973 with 12.
14 fixed thresholds have at least one qualifying day at Hamilton A.

Days at or above 30 C (86 F)

20 years with a qualifying day

Days per year at Hamilton A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 18 in 1969.

Days at or above 30 C (86 F) per year at Hamilton A
Year	Days	Decade average
1960	6	12.7
1962	10	12.7
1964	17	12.7
1965	8	12.7
1966	16	12.7
1968	14	12.7
1969	18	12.7
1971	15	10.9
1972	6	10.9
1973	18	10.9
1974	10	10.9
1975	11	10.9
1976	7	10.9
1977	8	10.9
1978	13	10.9
1979	10	10.9
1980	5	8.3
1981	7	8.3
1982	5	8.3
1983	16	8.3

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

First to last qualifying date each year at Hamilton A
Year	First date	Last date
1960	1960-07-12	1960-09-09
1962	1962-05-14	1962-08-31
1964	1964-06-19	1964-09-10
1965	1965-06-20	1965-09-18
1966	1966-06-23	1966-09-02
1968	1968-06-07	1968-08-24
1969	1969-05-29	1969-09-06
1971	1971-06-19	1971-09-08
1972	1972-07-12	1972-07-23
1973	1973-06-11	1973-09-05
1974	1974-07-03	1974-08-23
1975	1975-05-24	1975-08-02
1976	1976-06-08	1976-09-09
1977	1977-05-17	1977-09-01
1978	1978-05-27	1978-09-06
1979	1979-06-15	1979-09-01
1980	1980-06-26	1980-08-27
1981	1981-06-15	1981-07-19
1982	1982-07-15	1982-09-13
1983	1983-06-13	1983-09-10

Every Fixed Threshold

Fixed thresholds at Hamilton A
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	20	18	1969	16
35 C (95 F): Days	1	1	1973	1
90 F (32.2 C): Days	16	9	1973	3
0 C (32 F): Ice days (max	20	84	1960	53
0 C (32 F): Frost days (min	22	167	1978	136
-10 C (14 F): Days with min	22	69	1978	33
-20 C (-4 F): Days with min	21	11	1979	5
20 C (68 F): Tropical nights (min	21	12	1973	7
25 C (77 F): Days with min	1	1	1969	1
10 mm (0.39 in): Days with 10 mm or more rain	19	42	1982	37
25 mm (0.98 in): Days with 25 mm or more rain	19	8	1977	7
50 mm (1.97 in): Days with 50 mm or more rain	5	3	1981	1
10 cm (3.9 in): Days with 10 cm or more snowfall	19	8	1982	2
25 cm (9.8 in): Days with 25 cm or more snowfall	6	2	1965	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1960.

Download the Data

Data for Hamilton A 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).

Hamilton A Threshold Days by Year (CA006153194)

Key Facts for Hamilton A Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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