Heaslip Threshold Days by Year (CA006073420)

17 fixed thresholds counted per year at Heaslip (CA006073420): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Heaslip Thresholds

Heaslip: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 1947 with 22.
Heaslip: days with a maximum temperature at or below 0 C (32 F) in 30 years, most in 1933 with 128.
Heaslip: nights with a minimum temperature at or below 0 C (32 F) in 30 years, most in 1940 with 238.
Heaslip: nights with a minimum temperature at or below -10 C (14 F) in 30 years, most in 1940 with 154.
17 fixed thresholds have at least one qualifying day at Heaslip.

Days at or above 30 C (86 F)

30 years with a qualifying day

Days per year at Heaslip with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 22 in 1947.

Days at or above 30 C (86 F) per year at Heaslip
Year	Days	Decade average
1929	10	10
1930	5	8.3
1931	14	8.3
1932	2	8.3
1933	5	8.3
1934	2	8.3
1935	12	8.3
1936	8	8.3
1937	20	8.3
1938	7	8.3
1939	8	8.3
1940	4	11.2
1941	11	11.2
1942	9	11.2
1943	6	11.2
1944	21	11.2
1945	10	11.2
1946	4	11.2
1947	22	11.2
1948	10	11.2
1949	15	11.2
1950	7	8.7
1951	5	8.7
1952	15	8.7
1956	7	8.7
1957	8	8.7
1958	2	8.7
1959	17	8.7
1960	5	7
1966	9	7

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

First to last qualifying date each year at Heaslip
Year	First date	Last date
1929	1929-05-28	1929-09-04
1930	1930-06-03	1930-08-03
1931	1931-05-28	1931-09-12
1932	1932-06-18	1932-08-31
1933	1933-06-20	1933-09-03
1934	1934-06-05	1934-07-19
1935	1935-07-03	1935-08-20
1936	1936-07-06	1936-07-13
1937	1937-05-29	1937-08-20
1938	1938-06-20	1938-08-15
1939	1939-07-05	1939-09-15
1940	1940-07-22	1940-08-11
1941	1941-05-20	1941-09-21
1942	1942-05-01	1942-09-01
1943	1943-06-24	1943-07-14
1944	1944-05-25	1944-08-17
1945	1945-06-24	1945-09-08
1946	1946-06-25	1946-07-18
1947	1947-06-22	1947-09-07
1948	1948-06-02	1948-08-27
1949	1949-06-03	1949-08-09
1950	1950-06-09	1950-08-08
1951	1951-05-19	1951-07-06
1952	1952-06-14	1952-09-14
1956	1956-06-07	1956-08-12
1957	1957-06-16	1957-08-02
1958	1958-07-27	1958-08-02
1959	1959-06-08	1959-09-08
1960	1960-07-10	1960-09-07
1966	1966-06-23	1966-07-12

Every Fixed Threshold

Fixed thresholds at Heaslip
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	30	22	1947	9
35 C (95 F): Days	7	1	1931	1
90 F (32.2 C): Days	27	8	1931	5
100 F (37.8 C): Days	1	1	1931	1
0 C (32 F): Ice days (max	30	128	1933	103
0 C (32 F): Frost days (min	30	238	1940	232
-10 C (14 F): Days with min	30	154	1940	115
-20 C (-4 F): Days with min	30	92	1940	60
-30 C (-22 F): Days with min	30	38	1948	18
-40 C (-40 F): Days with min	21	9	1934	2
20 C (68 F): Tropical nights (min	9	2	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	13	29	1966	29
25 mm (0.98 in): Days with 25 mm or more rain	10	8	1933	7
50 mm (1.97 in): Days with 50 mm or more rain	6	1	1933	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1941	1
10 cm (3.9 in): Days with 10 cm or more snowfall	20	13	1933	6
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1929	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1929.

Download the Data

Data for Heaslip 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).

Heaslip Threshold Days by Year (CA006073420)

Key Facts for Heaslip Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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