Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Heaslip. 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 Heaslip, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
8.9 C (48.0 F)
-50.0 C (-58.0 F)
n/a
n/a
Feb
7.8 C (46.0 F)
-45.6 C (-50.1 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-43.3 C (-45.9 F)
n/a
n/a
Apr
27.8 C (82.0 F)
-25.6 C (-14.1 F)
n/a
n/a
May
32.2 C (90.0 F)
-12.2 C (10.0 F)
n/a
n/a
Jun
35.6 C (96.1 F)
-6.1 C (21.0 F)
n/a
n/a
Jul
37.8 C (100.0 F)
-5.6 C (21.9 F)
n/a
n/a
Aug
36.1 C (97.0 F)
-10.0 C (14.0 F)
n/a
n/a
Sep
34.4 C (93.9 F)
-9.4 C (15.1 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Nov
22.2 C (72.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Dec
12.2 C (54.0 F)
-48.3 C (-54.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Heaslip still stand. 1934 holds the most, with 77.
Standing records at Heaslip by the year they were set
Year set
Standing records
1928
9
1929
60
1930
43
1931
39
1932
56
1933
76
1934
77
1935
47
1936
56
1937
51
1938
35
1939
34
1940
36
1941
22
1942
38
1943
32
1944
41
1945
48
1946
53
1947
39
1948
25
1949
28
1950
41
1951
39
1952
25
1953
28
1954
6
1955
46
1956
32
1957
40
1958
43
1959
48
1960
27
1961
18
1962
22
1963
21
1965
25
1966
41
1967
17
Wettest Day of Each Month
Jun: 109.5 mm (4.3 in)
The wettest day on record for each calendar month at Heaslip. The most was 109.5 mm (4.3 in) on 27 June 1941.
Record daily precipitation for each month at Heaslip
Month
Record daily precipitation (mm)
Date
Jan
30.5 mm (1.2 in)
23 January 1929
Feb
32.3 mm (1.3 in)
21 February 1937
Mar
22.4 mm (0.9 in)
29 March 1951
Apr
31.8 mm (1.3 in)
22 April 1967
May
40.9 mm (1.6 in)
2 May 1936
Jun
109.5 mm (4.3 in)
27 June 1941
Jul
73.2 mm (2.9 in)
24 July 1945
Aug
45.5 mm (1.8 in)
1 August 1966
Sep
62.5 mm (2.5 in)
1 September 1945
Oct
47.2 mm (1.9 in)
22 October 1929
Nov
63.5 mm (2.5 in)
23 November 1934
Dec
35.8 mm (1.4 in)
20 December 1957
Period of Record Coverage
1928 to 1967
Complete yearUnder 90 percent of days
39 years of record at Heaslip, 1928 to 1967. 9 years have data for under 90 percent of days and are left out of rankings: 1928, 1953, 1954, 1955, 1961, 1962, 1963, 1965 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 20 complete years at Heaslip, 1929 to 1966. Blue stripes are years cooler than the station's own mean of 1.6 C (34.8 F); red stripes are warmer. The coolest year was 1935, at -0.2 C (31.6 F), and the warmest was 1931, at 3.4 C (38.1 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Heaslip as warming stripes, 1929 to 1966
Year
Annual mean temperature
Difference from the station mean
1929
0.8 C
-0.81 C
1931
3.4 C
+1.83 C
1932
1.2 C
-0.33 C
1934
0.6 C
-1.02 C
1935
-0.2 C
-1.80 C
1936
0.2 C
-1.38 C
1939
0.3 C
-1.28 C
1940
0.2 C
-1.37 C
1941
1.3 C
-0.31 C
1942
2.2 C
+0.64 C
1943
1.4 C
-0.17 C
1944
2.8 C
+1.23 C
1946
3.0 C
+1.38 C
1948
2.4 C
+0.78 C
1951
1.6 C
-0.01 C
1956
1.9 C
+0.36 C
1957
3.0 C
+1.38 C
1958
2.2 C
+0.67 C
1959
1.9 C
+0.30 C
1966
1.5 C
-0.03 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1928 to 1967
Yearly extremes at Heaslip: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.8 C (100.0 F)
1931
33.3 C (91.9 F)
39
Coldest night (TNn)
-50.0 C (-58.0 F)
1942
-41.7 C (-43.1 F)
39
Wettest day (Rx1day)
109.5 mm (4.3 in)
1941
33.9 mm (1.3 in)
38
Wettest five days (Rx5day)
139.7 mm (5.5 in)
1957
40.6 mm (1.6 in)
38
Longest dry spell (CDD)
40 days
1935
17 days
38
Hottest day (TXx)
The hottest day of the year at Heaslip, 1928 to 1967. The record is 37.8 C (100.0 F) in 1931, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Heaslip by year
Year
Hottest day (TXx)
1928
8.9 C (48.0 F)
1929
32.8 C (91.0 F)
1930
32.2 C (90.0 F)
1931
37.8 C (100.0 F)
1932
31.7 C (89.1 F)
1933
32.8 C (91.0 F)
1934
33.3 C (91.9 F)
1935
33.3 C (91.9 F)
1936
37.2 C (99.0 F)
1937
35.0 C (95.0 F)
1938
32.2 C (90.0 F)
1939
33.9 C (93.0 F)
1940
33.3 C (91.9 F)
1941
32.8 C (91.0 F)
1942
35.0 C (95.0 F)
1943
33.9 C (93.0 F)
1944
33.9 C (93.0 F)
1945
32.2 C (90.0 F)
1946
32.2 C (90.0 F)
1947
36.1 C (97.0 F)
1948
35.0 C (95.0 F)
1949
34.4 C (93.9 F)
1950
32.2 C (90.0 F)
1951
31.1 C (88.0 F)
1952
32.8 C (91.0 F)
1953
34.4 C (93.9 F)
1954
1.7 C (35.1 F)
1955
36.1 C (97.0 F)
1956
35.0 C (95.0 F)
1957
33.3 C (91.9 F)
1958
31.7 C (89.1 F)
1959
33.9 C (93.0 F)
1960
32.2 C (90.0 F)
1961
30.6 C (87.1 F)
1962
30.6 C (87.1 F)
1963
33.9 C (93.0 F)
1965
30.6 C (87.1 F)
1966
33.3 C (91.9 F)
1967
13.9 C (57.0 F)
Coldest night (TNn)
The coldest night of the year at Heaslip, 1928 to 1967. The record is -50.0 C (-58.0 F) in 1942, marked on the chart; the median year is -41.7 C (-43.1 F).
Coldest night (TNn) at Heaslip by year
Year
Coldest night (TNn)
1928
-29.4 C (-20.9 F)
1929
-40.6 C (-41.1 F)
1930
-41.1 C (-42.0 F)
1931
-37.8 C (-36.0 F)
1932
-38.9 C (-38.0 F)
1933
-48.3 C (-54.9 F)
1934
-44.4 C (-47.9 F)
1935
-46.7 C (-52.1 F)
1936
-40.0 C (-40.0 F)
1937
-42.2 C (-44.0 F)
1938
-41.7 C (-43.1 F)
1939
-45.6 C (-50.1 F)
1940
-38.9 C (-38.0 F)
1941
-41.7 C (-43.1 F)
1942
-50.0 C (-58.0 F)
1943
-45.6 C (-50.1 F)
1944
-38.9 C (-38.0 F)
1945
-43.3 C (-45.9 F)
1946
-41.1 C (-42.0 F)
1947
-41.7 C (-43.1 F)
1948
-41.1 C (-42.0 F)
1949
-33.9 C (-29.0 F)
1950
-46.1 C (-51.0 F)
1951
-48.9 C (-56.0 F)
1952
-43.9 C (-47.0 F)
1953
-37.8 C (-36.0 F)
1954
-41.1 C (-42.0 F)
1955
-45.0 C (-49.0 F)
1956
-35.6 C (-32.1 F)
1957
-42.8 C (-45.0 F)
1958
-36.1 C (-33.0 F)
1959
-38.3 C (-36.9 F)
1960
-34.4 C (-29.9 F)
1961
-40.0 C (-40.0 F)
1962
-46.1 C (-51.0 F)
1963
-44.4 C (-47.9 F)
1965
-40.0 C (-40.0 F)
1966
-44.4 C (-47.9 F)
1967
-43.9 C (-47.0 F)
Wettest day (Rx1day)
The wettest day of the year at Heaslip, 1928 to 1967. The record is 109.5 mm (4.3 in) in 1941, marked on the chart; the median year is 33.9 mm (1.3 in).
Wettest day (Rx1day) at Heaslip by year
Year
Wettest day (Rx1day)
1928
11.4 mm (0.4 in)
1929
47.2 mm (1.9 in)
1930
27.9 mm (1.1 in)
1931
34.0 mm (1.3 in)
1932
25.4 mm (1.0 in)
1933
50.8 mm (2.0 in)
1934
63.5 mm (2.5 in)
1935
56.1 mm (2.2 in)
1936
40.9 mm (1.6 in)
1937
32.3 mm (1.3 in)
1938
37.3 mm (1.5 in)
1939
70.1 mm (2.8 in)
1940
14.5 mm (0.6 in)
1941
109.5 mm (4.3 in)
1942
21.1 mm (0.8 in)
1943
12.7 mm (0.5 in)
1944
13.0 mm (0.5 in)
1945
73.2 mm (2.9 in)
1946
54.4 mm (2.1 in)
1947
53.1 mm (2.1 in)
1948
14.2 mm (0.6 in)
1949
53.8 mm (2.1 in)
1950
20.3 mm (0.8 in)
1951
25.4 mm (1.0 in)
1952
22.9 mm (0.9 in)
1953
17.8 mm (0.7 in)
1954
35.1 mm (1.4 in)
1955
43.9 mm (1.7 in)
1956
33.8 mm (1.3 in)
1957
98.0 mm (3.9 in)
1958
23.6 mm (0.9 in)
1959
n/a
1960
60.2 mm (2.4 in)
1961
31.8 mm (1.3 in)
1962
12.7 mm (0.5 in)
1963
8.1 mm (0.32 in)
1965
43.2 mm (1.7 in)
1966
45.5 mm (1.8 in)
1967
31.8 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Heaslip, 1928 to 1967. The record is 139.7 mm (5.5 in) in 1957, marked on the chart; the median year is 40.6 mm (1.6 in).
Wettest five days (Rx5day) at Heaslip by year
Year
Wettest five days (Rx5day)
1928
17.7 mm (0.7 in)
1929
91.6 mm (3.6 in)
1930
70.3 mm (2.8 in)
1931
57.4 mm (2.3 in)
1932
33.3 mm (1.3 in)
1933
82.5 mm (3.2 in)
1934
63.5 mm (2.5 in)
1935
66.6 mm (2.6 in)
1936
53.9 mm (2.1 in)
1937
32.3 mm (1.3 in)
1938
38.8 mm (1.5 in)
1939
89.1 mm (3.5 in)
1940
26.4 mm (1.0 in)
1941
109.5 mm (4.3 in)
1942
21.1 mm (0.8 in)
1943
16.5 mm (0.6 in)
1944
16.0 mm (0.6 in)
1945
81.1 mm (3.2 in)
1946
73.9 mm (2.9 in)
1947
65.3 mm (2.6 in)
1948
24.6 mm (1.0 in)
1949
88.1 mm (3.5 in)
1950
25.4 mm (1.0 in)
1951
37.6 mm (1.5 in)
1952
38.1 mm (1.5 in)
1953
23.6 mm (0.9 in)
1954
40.4 mm (1.6 in)
1955
46.2 mm (1.8 in)
1956
40.7 mm (1.6 in)
1957
139.7 mm (5.5 in)
1958
36.6 mm (1.4 in)
1959
n/a
1960
110.7 mm (4.4 in)
1961
38.9 mm (1.5 in)
1962
17.8 mm (0.7 in)
1963
19.6 mm (0.8 in)
1965
66.8 mm (2.6 in)
1966
59.2 mm (2.3 in)
1967
39.8 mm (1.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Heaslip, 1928 to 1967. The record is 40 days in 1935, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Heaslip by year
Year
Longest dry spell (CDD)
1928
13 days
1929
18 days
1930
14 days
1931
12 days
1932
22 days
1933
17 days
1934
16 days
1935
40 days
1936
18 days
1937
22 days
1938
20 days
1939
20 days
1940
22 days
1941
26 days
1942
22 days
1943
19 days
1944
14 days
1945
13 days
1946
19 days
1947
16 days
1948
19 days
1949
15 days
1950
20 days
1951
12 days
1952
14 days
1953
14 days
1954
13 days
1955
17 days
1956
18 days
1957
16 days
1958
33 days
1959
n/a
1960
19 days
1961
27 days
1962
8 days
1963
12 days
1965
9 days
1966
12 days
1967
10 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
20 years with a frost
Across 20 years with a frost, the median last spring frost at Heaslip falls on 14 June and the median first autumn frost on 27 August, which leaves a median of 79 days between them.
Frost dates and growing season at Heaslip
Measure
Median, all years
Earliest period
Recent period (1929 to 1966)
Recent against earliest
Fitted trend
Last spring frost
14 June
n/a
14 June
n/a
n/a
First autumn frost
27 August
n/a
27 August
n/a
n/a
Growing days
79 days
n/a
79 days
n/a
n/a
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.
Download the Data
Data for Heaslip standing records by year: CSV or JSON. Field meanings are on the data page.
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.