Lucan Threshold Days by Year

18 fixed thresholds counted per year at Lucan (CA006144665): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lucan Thresholds

Lucan: days with 10 mm (0.39 in) or more of precipitation in 44 years, most in 1916 with 47.
Lucan: days with 25 mm (0.98 in) or more of precipitation in 44 years, most in 1932 with 14.
Lucan: days with 10 cm (3.9 in) or more of snowfall in 44 years, most in 1917 with 17.
Lucan: days with a maximum temperature at or above 30 C (86 F) in 38 years, most in 1921 with 40.
18 fixed thresholds have at least one qualifying day at Lucan.

Days at or above 30 C (86 F)

38 years with a qualifying day

Days per year at Lucan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1921.

Days at or above 30 C (86 F) per year at Lucan
Year	Days	Decade average
1916	34	26.5
1917	15	26.5
1918	25	26.5
1919	32	26.5
1920	15	24.6
1921	40	24.6
1922	28	24.6
1923	29	24.6
1925	30	24.6
1926	12	24.6
1927	15	24.6
1928	21	24.6
1929	31	24.6
1930	36	31.5
1931	33	31.5
1932	16	31.5
1933	35	31.5
1934	38	31.5
1935	25	31.5
1936	40	31.5
1937	28	31.5
1938	28	31.5
1939	36	31.5
1940	26	22.8
1941	33	22.8
1942	15	22.8
1943	16	22.8
1944	36	22.8
1945	8	22.8
1946	21	22.8
1947	27	22.8
1950	19	18.3
1952	25	18.3
1953	14	18.3
1955	36	18.3
1956	6	18.3
1957	10	18.3
1960	5	5

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

First to last qualifying date each year at Lucan
Year	First date	Last date
1916	1916-07-03	1916-09-08
1917	1917-07-21	1917-08-21
1918	1918-06-01	1918-08-24
1919	1919-05-30	1919-09-09
1920	1920-06-11	1920-09-27
1921	1921-05-21	1921-09-11
1922	1922-06-07	1922-10-04
1923	1923-06-05	1923-09-28
1925	1925-06-02	1925-09-10
1926	1926-05-18	1926-08-29
1927	1927-05-23	1927-09-18
1928	1928-05-05	1928-09-11
1929	1929-05-28	1929-09-06
1930	1930-05-08	1930-09-15
1931	1931-05-28	1931-09-22
1932	1932-06-18	1932-09-01
1933	1933-05-24	1933-09-08
1934	1934-05-19	1934-08-19
1935	1935-06-14	1935-08-20
1936	1936-05-07	1936-09-23
1937	1937-05-31	1937-09-03
1938	1938-06-22	1938-08-29
1939	1939-05-19	1939-09-16
1940	1940-06-03	1940-09-23
1941	1941-05-21	1941-09-21
1942	1942-05-30	1942-09-17
1943	1943-06-04	1943-09-01
1944	1944-05-26	1944-09-03
1945	1945-06-29	1945-09-07
1946	1946-06-24	1946-10-06
1947	1947-06-10	1947-09-10
1950	1950-06-07	1950-08-31
1952	1952-06-09	1952-09-15
1953	1953-06-20	1953-09-05
1955	1955-06-18	1955-09-19
1956	1956-06-11	1956-07-01
1957	1957-06-16	1957-08-04
1960	1960-07-22	1960-09-08

Every Fixed Threshold

Fixed thresholds at Lucan
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	38	40	1921	5
35 C (95 F): Days	24	12	1933	2
40 C (104 F): Days	1	1	1918	1
90 F (32.2 C): Days	37	28	1921	1
100 F (37.8 C): Days	5	6	1936	6
0 C (32 F): Ice days (max	38	94	1960	94
0 C (32 F): Frost days (min	38	177	1917	149
-10 C (14 F): Days with min	38	70	1917	61
-20 C (-4 F): Days with min	33	21	1918	7
-30 C (-22 F): Days with min	2	2	1934	2
20 C (68 F): Tropical nights (min	38	15	1955	1
25 C (77 F): Days with min	2	1	1918	1
10 mm (0.39 in): Days with 10 mm or more rain	44	47	1916	25
25 mm (0.98 in): Days with 25 mm or more rain	44	14	1932	5
50 mm (1.97 in): Days with 50 mm or more rain	19	4	1932	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1942	1
10 cm (3.9 in): Days with 10 cm or more snowfall	44	17	1917	1
25 cm (9.8 in): Days with 25 cm or more snowfall	20	3	1922	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1916.

Download the Data

Data for Lucan 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).

Lucan Threshold Days by Year

Key Facts for Lucan Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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