Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Lucan. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Lucan, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.7 C (62.1 F)
-27.8 C (-18.0 F)
n/a
n/a
Feb
15.6 C (60.1 F)
-35.6 C (-32.1 F)
n/a
n/a
Mar
24.4 C (75.9 F)
-23.9 C (-11.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-19.4 C (-2.9 F)
n/a
n/a
May
32.8 C (91.0 F)
-7.2 C (19.0 F)
n/a
n/a
Jun
38.9 C (102.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
38.9 C (102.0 F)
3.9 C (39.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
1.7 C (35.1 F)
n/a
n/a
Sep
36.1 C (97.0 F)
-2.8 C (27.0 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-6.7 C (19.9 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-19.4 C (-2.9 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-26.1 C (-15.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Lucan still stand. 1920 holds the most, with 65.
Standing records at Lucan by the year they were set
Year set
Standing records
1915
9
1916
50
1917
52
1918
60
1919
31
1920
65
1921
45
1922
30
1923
45
1924
21
1925
46
1926
39
1927
48
1928
32
1929
29
1930
44
1931
40
1932
42
1933
32
1934
49
1935
36
1936
57
1937
28
1938
22
1939
19
1940
36
1941
25
1942
39
1943
29
1944
14
1945
35
1946
30
1947
30
1948
17
1950
29
1951
9
1952
22
1953
22
1954
25
1955
20
1956
27
1957
28
1958
9
1959
16
1960
23
1961
8
All-Time Record Progression
1 new records
1 all-time records were set at Lucan between 8 September 1942 and 8 September 1942. Each dot is a new record.
When Lucan set new all-time records
Date
Kind
Detail
1942-09-08
Record daily precipitation
Record daily precipitation 118.1 mm (4.6 in)
Wettest Day of Each Month
Sep: 118.1 mm (4.6 in)
The wettest day on record for each calendar month at Lucan. The most was 118.1 mm (4.6 in) on 8 September 1942.
Record daily precipitation for each month at Lucan
Month
Record daily precipitation (mm)
Date
Jan
45.7 mm (1.8 in)
19 January 1929
Feb
43.2 mm (1.7 in)
19 February 1939
Mar
63.5 mm (2.5 in)
28 March 1931
Apr
61.0 mm (2.4 in)
25 April 1937
May
82.8 mm (3.3 in)
15 May 1970
Jun
83.8 mm (3.3 in)
13 June 1943
Jul
115.6 mm (4.6 in)
10 July 1883
Aug
73.7 mm (2.9 in)
10 August 1938
Sep
118.1 mm (4.6 in)
8 September 1942
Oct
62.2 mm (2.4 in)
1 October 1945
Nov
49.8 mm (2.0 in)
18 November 1969
Dec
48.8 mm (1.9 in)
12 December 1946
Period of Record Coverage
1915 to 1961
Complete yearUnder 90 percent of days
46 years of record at Lucan, 1915 to 1961. 8 years have data for under 90 percent of days and are left out of rankings: 1915, 1924, 1948, 1951, 1954, 1958, 1959, 1961.
Cooler than the station meanWarmer than the station mean
One stripe for each of 33 complete years at Lucan, 1916 to 1960. Blue stripes are years cooler than the station's own mean of 7.5 C (45.6 F); red stripes are warmer. The coolest year was 1917, at 5.3 C (41.5 F), and the warmest was 1921, at 9.3 C (48.7 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Lucan as warming stripes, 1916 to 1960
Year
Annual mean temperature
Difference from the station mean
1916
7.4 C
-0.18 C
1917
5.3 C
-2.24 C
1918
7.0 C
-0.56 C
1919
8.1 C
+0.59 C
1920
6.9 C
-0.61 C
1921
9.3 C
+1.74 C
1922
8.3 C
+0.72 C
1923
7.1 C
-0.45 C
1925
7.3 C
-0.22 C
1926
6.1 C
-1.44 C
1927
7.6 C
+0.09 C
1928
7.4 C
-0.14 C
1929
7.0 C
-0.52 C
1930
8.0 C
+0.50 C
1931
9.0 C
+1.41 C
1932
8.0 C
+0.50 C
1933
8.2 C
+0.70 C
1934
7.1 C
-0.46 C
1935
6.8 C
-0.72 C
1936
6.9 C
-0.62 C
1937
7.3 C
-0.25 C
1938
8.3 C
+0.80 C
1939
7.8 C
+0.28 C
1940
6.4 C
-1.10 C
1941
8.5 C
+0.97 C
1942
7.8 C
+0.25 C
1943
6.8 C
-0.78 C
1944
8.1 C
+0.51 C
1945
7.2 C
-0.32 C
1946
8.7 C
+1.15 C
1947
7.8 C
+0.27 C
1953
8.4 C
+0.88 C
1960
6.9 C
-0.65 C
The fitted trend in annual mean temperature here over 1916 to 1960 is 0.1 C (-0.2 to 0.4) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.3 to 0.7) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Lucan
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.2 to 0.4) per decade
0.2 F (-0.3 to 0.7) per decade
1916 to 1960
33
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.4 to 0.2) per decade
-0.2 F (-0.7 to 0.4) per decade
1916 to 1960
33
Not clearly different from zero
Mean daily minimum
0.3 C (0.1 to 0.6) per decade
0.6 F (0.1 to 1.1) per decade
1916 to 1960
33
Rise
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1871 to 1975
Yearly extremes at Lucan: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1918
35.0 C (95.0 F)
46
Coldest night (TNn)
-35.6 C (-32.1 F)
1934
-22.5 C (-8.5 F)
46
Wettest day (Rx1day)
118.1 mm (4.6 in)
1942
46.4 mm (1.8 in)
62
Wettest five days (Rx5day)
139.7 mm (5.5 in)
1937
69.1 mm (2.7 in)
62
Longest dry spell (CDD)
30 days
1927
17 days
62
Hottest day (TXx)
The hottest day of the year at Lucan, 1871 to 1975. The record is 40.0 C (104.0 F) in 1918, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Lucan by year
Year
Hottest day (TXx)
1871
n/a
1872
n/a
1873
n/a
1880
n/a
1881
n/a
1882
n/a
1883
n/a
1884
n/a
1915
31.7 C (89.1 F)
1916
37.2 C (99.0 F)
1917
37.2 C (99.0 F)
1918
40.0 C (104.0 F)
1919
36.1 C (97.0 F)
1920
33.3 C (91.9 F)
1921
38.3 C (100.9 F)
1922
34.4 C (93.9 F)
1923
35.0 C (95.0 F)
1924
33.3 C (91.9 F)
1925
36.1 C (97.0 F)
1926
36.1 C (97.0 F)
1927
34.4 C (93.9 F)
1928
33.3 C (91.9 F)
1929
35.6 C (96.1 F)
1930
35.6 C (96.1 F)
1931
36.1 C (97.0 F)
1932
34.4 C (93.9 F)
1933
38.3 C (100.9 F)
1934
38.9 C (102.0 F)
1935
35.0 C (95.0 F)
1936
38.9 C (102.0 F)
1937
34.4 C (93.9 F)
1938
35.0 C (95.0 F)
1939
36.1 C (97.0 F)
1940
35.0 C (95.0 F)
1941
37.2 C (99.0 F)
1942
33.9 C (93.0 F)
1943
33.3 C (91.9 F)
1944
37.2 C (99.0 F)
1945
32.2 C (90.0 F)
1946
35.0 C (95.0 F)
1947
35.0 C (95.0 F)
1948
35.0 C (95.0 F)
1950
36.7 C (98.1 F)
1951
31.7 C (89.1 F)
1952
34.4 C (93.9 F)
1953
34.4 C (93.9 F)
1954
32.2 C (90.0 F)
1955
35.6 C (96.1 F)
1956
31.7 C (89.1 F)
1957
33.3 C (91.9 F)
1958
30.6 C (87.1 F)
1959
32.8 C (91.0 F)
1960
32.2 C (90.0 F)
1961
18.3 C (64.9 F)
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
Coldest night (TNn)
The coldest night of the year at Lucan, 1871 to 1975. The record is -35.6 C (-32.1 F) in 1934, marked on the chart; the median year is -22.5 C (-8.5 F).
Coldest night (TNn) at Lucan by year
Year
Coldest night (TNn)
1871
n/a
1872
n/a
1873
n/a
1880
n/a
1881
n/a
1882
n/a
1883
n/a
1884
n/a
1915
-16.7 C (1.9 F)
1916
-23.9 C (-11.0 F)
1917
-27.2 C (-17.0 F)
1918
-30.0 C (-22.0 F)
1919
-22.8 C (-9.0 F)
1920
-27.8 C (-18.0 F)
1921
-18.9 C (-2.0 F)
1922
-22.8 C (-9.0 F)
1923
-20.6 C (-5.1 F)
1924
-23.3 C (-9.9 F)
1925
-27.2 C (-17.0 F)
1926
-23.3 C (-9.9 F)
1927
-25.6 C (-14.1 F)
1928
-26.1 C (-15.0 F)
1929
-26.1 C (-15.0 F)
1930
-22.8 C (-9.0 F)
1931
-17.8 C (0.0 F)
1932
-20.6 C (-5.1 F)
1933
-25.6 C (-14.1 F)
1934
-35.6 C (-32.1 F)
1935
-27.8 C (-18.0 F)
1936
-23.9 C (-11.0 F)
1937
-22.8 C (-9.0 F)
1938
-20.0 C (-4.0 F)
1939
-21.1 C (-6.0 F)
1940
-24.4 C (-11.9 F)
1941
-21.7 C (-7.1 F)
1942
-26.1 C (-15.0 F)
1943
-21.7 C (-7.1 F)
1944
-20.6 C (-5.1 F)
1945
-22.2 C (-8.0 F)
1946
-20.6 C (-5.1 F)
1947
-17.8 C (0.0 F)
1948
-25.6 C (-14.1 F)
1950
-21.1 C (-6.0 F)
1951
-17.2 C (1.0 F)
1952
-20.6 C (-5.1 F)
1953
-15.6 C (3.9 F)
1954
-22.2 C (-8.0 F)
1955
-22.2 C (-8.0 F)
1956
-19.4 C (-2.9 F)
1957
-24.4 C (-11.9 F)
1958
-22.2 C (-8.0 F)
1959
-15.6 C (3.9 F)
1960
-22.2 C (-8.0 F)
1961
-26.7 C (-16.1 F)
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
Wettest day (Rx1day)
The wettest day of the year at Lucan, 1871 to 1975. The record is 118.1 mm (4.6 in) in 1942, marked on the chart; the median year is 46.4 mm (1.8 in).
Wettest day (Rx1day) at Lucan by year
Year
Wettest day (Rx1day)
1871
31.8 mm (1.3 in)
1872
30.5 mm (1.2 in)
1873
21.3 mm (0.8 in)
1880
54.9 mm (2.2 in)
1881
48.3 mm (1.9 in)
1882
30.5 mm (1.2 in)
1883
115.6 mm (4.6 in)
1884
49.3 mm (1.9 in)
1915
46.0 mm (1.8 in)
1916
44.7 mm (1.8 in)
1917
36.8 mm (1.4 in)
1918
47.5 mm (1.9 in)
1919
40.6 mm (1.6 in)
1920
35.6 mm (1.4 in)
1921
63.0 mm (2.5 in)
1922
53.3 mm (2.1 in)
1923
30.5 mm (1.2 in)
1924
38.1 mm (1.5 in)
1925
38.1 mm (1.5 in)
1926
57.2 mm (2.3 in)
1927
65.8 mm (2.6 in)
1928
57.7 mm (2.3 in)
1929
45.7 mm (1.8 in)
1930
33.0 mm (1.3 in)
1931
63.5 mm (2.5 in)
1932
56.9 mm (2.2 in)
1933
30.5 mm (1.2 in)
1934
59.7 mm (2.4 in)
1935
53.1 mm (2.1 in)
1936
38.1 mm (1.5 in)
1937
61.0 mm (2.4 in)
1938
73.7 mm (2.9 in)
1939
48.3 mm (1.9 in)
1940
40.6 mm (1.6 in)
1941
43.2 mm (1.7 in)
1942
118.1 mm (4.6 in)
1943
83.8 mm (3.3 in)
1944
33.5 mm (1.3 in)
1945
62.2 mm (2.4 in)
1946
48.8 mm (1.9 in)
1947
64.0 mm (2.5 in)
1948
44.5 mm (1.8 in)
1950
35.6 mm (1.4 in)
1951
30.5 mm (1.2 in)
1952
29.0 mm (1.1 in)
1953
42.4 mm (1.7 in)
1954
55.4 mm (2.2 in)
1955
61.0 mm (2.4 in)
1956
47.8 mm (1.9 in)
1957
46.7 mm (1.8 in)
1958
37.1 mm (1.5 in)
1959
54.1 mm (2.1 in)
1960
40.6 mm (1.6 in)
1961
25.7 mm (1.0 in)
1968
36.1 mm (1.4 in)
1969
49.8 mm (2.0 in)
1970
82.8 mm (3.3 in)
1971
56.4 mm (2.2 in)
1972
59.9 mm (2.4 in)
1973
43.2 mm (1.7 in)
1974
38.4 mm (1.5 in)
1975
18.0 mm (0.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lucan, 1871 to 1975. The record is 139.7 mm (5.5 in) in 1937, marked on the chart; the median year is 69.1 mm (2.7 in).
Wettest five days (Rx5day) at Lucan by year
Year
Wettest five days (Rx5day)
1871
55.9 mm (2.2 in)
1872
49.3 mm (1.9 in)
1873
46.0 mm (1.8 in)
1880
61.8 mm (2.4 in)
1881
67.8 mm (2.7 in)
1882
49.8 mm (2.0 in)
1883
134.2 mm (5.3 in)
1884
63.3 mm (2.5 in)
1915
59.7 mm (2.4 in)
1916
68.5 mm (2.7 in)
1917
64.6 mm (2.5 in)
1918
73.6 mm (2.9 in)
1919
73.6 mm (2.9 in)
1920
61.3 mm (2.4 in)
1921
90.5 mm (3.6 in)
1922
93.1 mm (3.7 in)
1923
78.7 mm (3.1 in)
1924
66.1 mm (2.6 in)
1925
57.8 mm (2.3 in)
1926
66.6 mm (2.6 in)
1927
115.9 mm (4.6 in)
1928
73.7 mm (2.9 in)
1929
65.8 mm (2.6 in)
1930
79.3 mm (3.1 in)
1931
116.9 mm (4.6 in)
1932
107.9 mm (4.2 in)
1933
56.7 mm (2.2 in)
1934
90.5 mm (3.6 in)
1935
78.5 mm (3.1 in)
1936
63.8 mm (2.5 in)
1937
139.7 mm (5.5 in)
1938
94.5 mm (3.7 in)
1939
87.4 mm (3.4 in)
1940
87.1 mm (3.4 in)
1941
60.4 mm (2.4 in)
1942
122.4 mm (4.8 in)
1943
125.5 mm (4.9 in)
1944
45.0 mm (1.8 in)
1945
127.0 mm (5.0 in)
1946
66.6 mm (2.6 in)
1947
77.0 mm (3.0 in)
1948
77.2 mm (3.0 in)
1950
63.6 mm (2.5 in)
1951
35.5 mm (1.4 in)
1952
50.8 mm (2.0 in)
1953
47.4 mm (1.9 in)
1954
112.1 mm (4.4 in)
1955
64.3 mm (2.5 in)
1956
65.1 mm (2.6 in)
1957
88.1 mm (3.5 in)
1958
53.4 mm (2.1 in)
1959
95.0 mm (3.7 in)
1960
61.7 mm (2.4 in)
1961
46.7 mm (1.8 in)
1968
69.6 mm (2.7 in)
1969
84.1 mm (3.3 in)
1970
103.3 mm (4.1 in)
1971
64.8 mm (2.6 in)
1972
76.2 mm (3.0 in)
1973
71.1 mm (2.8 in)
1974
76.2 mm (3.0 in)
1975
35.8 mm (1.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lucan, 1871 to 1975. The record is 30 days in 1927, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Lucan by year
Year
Longest dry spell (CDD)
1871
19 days
1872
20 days
1873
17 days
1880
12 days
1881
21 days
1882
11 days
1883
12 days
1884
23 days
1915
16 days
1916
18 days
1917
19 days
1918
16 days
1919
18 days
1920
16 days
1921
18 days
1922
17 days
1923
12 days
1924
23 days
1925
17 days
1926
19 days
1927
30 days
1928
14 days
1929
20 days
1930
19 days
1931
12 days
1932
16 days
1933
25 days
1934
18 days
1935
17 days
1936
23 days
1937
13 days
1938
15 days
1939
16 days
1940
11 days
1941
16 days
1942
21 days
1943
22 days
1944
18 days
1945
13 days
1946
21 days
1947
21 days
1948
19 days
1950
16 days
1951
15 days
1952
20 days
1953
21 days
1954
18 days
1955
19 days
1956
16 days
1957
17 days
1958
26 days
1959
13 days
1960
11 days
1961
15 days
1968
9 days
1969
19 days
1970
14 days
1971
14 days
1972
12 days
1973
27 days
1974
14 days
1975
5 days
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
33 years with a frost
Across 33 years with a frost, the median last spring frost at Lucan falls on 13 May and the median first autumn frost on 6 October, which leaves a median of 143 days between them.
Fitted over all years, the growing season changes by +5.7 days per decade at this station.
Frost dates and growing season at Lucan
Measure
Median, all years
Earliest period
Recent period (1919 to 1960)
Recent against earliest
Fitted trend
Last spring frost
13 May
n/a
13 May
n/a
-3.0 days per decade
First autumn frost
6 October
n/a
7 October
n/a
+2.7 days per decade
Growing days
143 days
n/a
144 days
n/a
+5.7 days per decade
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
44 years, 1872 to 1974
A day with at least 48.2 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 107.7 mm (4.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Lucan: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
48.2 mm (1.9 in)
5 years
62.5 mm (2.5 in)
10 years
72.6 mm (2.9 in)
25 years
86.1 mm (3.4 in)
50 years
96.7 mm (3.8 in)
Longer than the 44 years of record
100 years
107.7 mm (4.2 in)
Longer than the 44 years of record
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 44 years of values from 1872 to 1974.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 118.1 mm (4.6 in) in 1942; 83.8 mm (3.3 in) in 1943; 82.8 mm (3.3 in) in 1970.
Download the Data
Data for Lucan standing records by year: CSV or JSON. Field meanings are on the data page.
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). Records are computed by this site and are not official.