Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Armagh. 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 Armagh, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.9 C (57.0 F)
-35.6 C (-32.1 F)
n/a
n/a
Feb
13.3 C (55.9 F)
-35.6 C (-32.1 F)
n/a
n/a
Mar
20.0 C (68.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Apr
27.8 C (82.0 F)
-22.2 C (-8.0 F)
n/a
n/a
May
31.1 C (88.0 F)
-11.7 C (10.9 F)
n/a
n/a
Jun
32.2 C (90.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
35.6 C (96.1 F)
1.7 C (35.1 F)
n/a
n/a
Aug
32.8 C (91.0 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
31.1 C (88.0 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
27.2 C (81.0 F)
-12.2 C (10.0 F)
n/a
n/a
Nov
21.7 C (71.1 F)
-25.0 C (-13.0 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-37.2 C (-35.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Armagh still stand. 1936 holds the most, with 48.
Standing records at Armagh by the year they were set
Year set
Standing records
1916
18
1917
23
1918
37
1919
31
1920
24
1921
26
1922
39
1923
34
1924
10
1925
16
1926
34
1927
22
1928
22
1929
21
1930
32
1931
35
1932
38
1933
42
1934
38
1935
30
1936
48
1937
31
1938
47
1939
35
1940
23
1941
32
1942
37
1943
34
1944
24
1945
35
1946
21
1947
38
1948
24
1949
24
1950
28
1951
36
1952
9
1953
26
1954
23
1955
13
1956
29
1957
30
1958
23
1959
24
1960
20
1961
12
1962
20
1963
18
1964
23
1965
17
1966
25
1967
17
1968
28
1969
8
1970
10
Wettest Day of Each Month
Jun: 116.1 mm (4.6 in)
The wettest day on record for each calendar month at Armagh. The most was 116.1 mm (4.6 in) on 18 June 1922.
Record daily precipitation for each month at Armagh
Month
Record daily precipitation (mm)
Date
Jan
55.9 mm (2.2 in)
24 January 1919
Feb
34.8 mm (1.4 in)
7 February 1951
Mar
50.8 mm (2.0 in)
8 March 1926
Apr
43.2 mm (1.7 in)
6 April 1952
May
59.7 mm (2.4 in)
25 May 1928
Jun
116.1 mm (4.6 in)
18 June 1922
Jul
74.2 mm (2.9 in)
8 July 1918
Aug
55.4 mm (2.2 in)
4 August 1967
Sep
67.3 mm (2.6 in)
30 September 1924
Oct
66.0 mm (2.6 in)
19 October 1928
Nov
63.2 mm (2.5 in)
4 November 1950
Dec
38.1 mm (1.5 in)
16 December 1927
Period of Record Coverage
1916 to 1970
Complete yearUnder 90 percent of days
55 years of record at Armagh, 1916 to 1970. 7 years have data for under 90 percent of days and are left out of rankings: 1916, 1917, 1920, 1921, 1929, 1958, 1970.
Cooler than the station meanWarmer than the station mean
One stripe for each of 46 complete years at Armagh, 1918 to 1969. Blue stripes are years cooler than the station's own mean of 3.8 C (38.9 F); red stripes are warmer. The coolest year was 1926, at 1.6 C (34.9 F), and the warmest was 1937, at 5.8 C (42.5 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Armagh as warming stripes, 1918 to 1969
Year
Annual mean temperature
Difference from the station mean
1918
2.9 C
-0.97 C
1919
3.6 C
-0.24 C
1922
3.2 C
-0.59 C
1925
4.1 C
+0.26 C
1926
1.6 C
-2.20 C
1927
3.9 C
+0.10 C
1928
2.9 C
-0.89 C
1930
5.4 C
+1.56 C
1931
5.5 C
+1.67 C
1932
3.8 C
-0.06 C
1933
4.4 C
+0.55 C
1934
3.7 C
-0.12 C
1935
3.9 C
+0.03 C
1936
4.2 C
+0.39 C
1937
5.8 C
+1.99 C
1938
5.4 C
+1.57 C
1939
3.8 C
-0.01 C
1940
2.7 C
-1.08 C
1941
3.7 C
-0.13 C
1942
3.9 C
+0.06 C
1943
3.0 C
-0.80 C
1944
4.1 C
+0.26 C
1945
4.1 C
+0.31 C
1946
4.1 C
+0.31 C
1947
3.8 C
-0.04 C
1948
3.5 C
-0.36 C
1949
4.5 C
+0.65 C
1950
3.6 C
-0.19 C
1951
3.9 C
+0.12 C
1952
4.2 C
+0.42 C
1953
5.1 C
+1.27 C
1954
3.3 C
-0.52 C
1955
3.3 C
-0.57 C
1956
2.7 C
-1.14 C
1957
3.7 C
-0.12 C
1959
4.0 C
+0.13 C
1960
4.0 C
+0.16 C
1961
4.0 C
+0.13 C
1962
2.9 C
-0.90 C
1963
3.4 C
-0.46 C
1964
4.2 C
+0.34 C
1965
3.2 C
-0.60 C
1966
4.3 C
+0.45 C
1967
3.3 C
-0.56 C
1968
3.4 C
-0.44 C
1969
4.1 C
+0.26 C
The fitted trend in annual mean temperature here over 1918 to 1969 is -0.02 C (-0.19 to 0.15) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.04 F (-0.33 to 0.26) per decade. The slope is a straight line fitted to 46 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Armagh
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.02 C (-0.19 to 0.15) per decade
-0.04 F (-0.33 to 0.26) per decade
1918 to 1969
46
Not clearly different from zero
Mean daily maximum
0.01 C (-0.18 to 0.19) per decade
0.01 F (-0.32 to 0.34) per decade
1918 to 1969
46
Not clearly different from zero
Mean daily minimum
-0.04 C (-0.25 to 0.16) per decade
-0.1 F (-0.5 to 0.3) per decade
1918 to 1969
46
Not clearly different from zero
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
1916 to 1970
Yearly extremes at Armagh: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
35.6 C (96.1 F)
1921
30.6 C (87.1 F)
55
Coldest night (TNn)
-37.2 C (-35.0 F)
1933
-31.7 C (-25.1 F)
55
Wettest day (Rx1day)
116.1 mm (4.6 in)
1922
45.0 mm (1.8 in)
55
Wettest five days (Rx5day)
143.3 mm (5.6 in)
1922
69.9 mm (2.8 in)
55
Longest dry spell (CDD)
30 days
1930
15 days
55
Hottest day (TXx)
The hottest day of the year at Armagh, 1916 to 1970. The record is 35.6 C (96.1 F) in 1921, marked on the chart; the median year is 30.6 C (87.1 F).
Hottest day (TXx) at Armagh by year
Year
Hottest day (TXx)
1916
32.2 C (90.0 F)
1917
31.1 C (88.0 F)
1918
30.0 C (86.0 F)
1919
31.7 C (89.1 F)
1920
27.8 C (82.0 F)
1921
35.6 C (96.1 F)
1922
30.0 C (86.0 F)
1923
31.1 C (88.0 F)
1924
27.2 C (81.0 F)
1925
29.4 C (84.9 F)
1926
27.8 C (82.0 F)
1927
28.9 C (84.0 F)
1928
30.6 C (87.1 F)
1929
29.4 C (84.9 F)
1930
32.8 C (91.0 F)
1931
33.9 C (93.0 F)
1932
29.4 C (84.9 F)
1933
31.1 C (88.0 F)
1934
30.0 C (86.0 F)
1935
32.2 C (90.0 F)
1936
30.6 C (87.1 F)
1937
32.2 C (90.0 F)
1938
31.7 C (89.1 F)
1939
32.8 C (91.0 F)
1940
30.6 C (87.1 F)
1941
32.2 C (90.0 F)
1942
31.1 C (88.0 F)
1943
31.1 C (88.0 F)
1944
31.7 C (89.1 F)
1945
29.4 C (84.9 F)
1946
31.1 C (88.0 F)
1947
32.2 C (90.0 F)
1948
30.0 C (86.0 F)
1949
32.2 C (90.0 F)
1950
29.4 C (84.9 F)
1951
28.9 C (84.0 F)
1952
32.8 C (91.0 F)
1953
34.4 C (93.9 F)
1954
31.7 C (89.1 F)
1955
33.3 C (91.9 F)
1956
30.6 C (87.1 F)
1957
31.1 C (88.0 F)
1958
27.2 C (81.0 F)
1959
33.9 C (93.0 F)
1960
32.2 C (90.0 F)
1961
30.0 C (86.0 F)
1962
28.3 C (82.9 F)
1963
32.2 C (90.0 F)
1964
30.6 C (87.1 F)
1965
30.0 C (86.0 F)
1966
29.4 C (84.9 F)
1967
30.0 C (86.0 F)
1968
30.6 C (87.1 F)
1969
30.6 C (87.1 F)
1970
21.7 C (71.1 F)
Coldest night (TNn)
The coldest night of the year at Armagh, 1916 to 1970. The record is -37.2 C (-35.0 F) in 1933, marked on the chart; the median year is -31.7 C (-25.1 F).
Coldest night (TNn) at Armagh by year
Year
Coldest night (TNn)
1916
-26.7 C (-16.1 F)
1917
-36.1 C (-33.0 F)
1918
-34.4 C (-29.9 F)
1919
-33.9 C (-29.0 F)
1920
-35.6 C (-32.1 F)
1921
-31.7 C (-25.1 F)
1922
-33.3 C (-27.9 F)
1923
-35.6 C (-32.1 F)
1924
-31.1 C (-24.0 F)
1925
-31.1 C (-24.0 F)
1926
-30.0 C (-22.0 F)
1927
-31.7 C (-25.1 F)
1928
-30.0 C (-22.0 F)
1929
-31.7 C (-25.1 F)
1930
-32.2 C (-26.0 F)
1931
-30.0 C (-22.0 F)
1932
-26.7 C (-16.1 F)
1933
-37.2 C (-35.0 F)
1934
-34.4 C (-29.9 F)
1935
-32.2 C (-26.0 F)
1936
-28.3 C (-18.9 F)
1937
-28.9 C (-20.0 F)
1938
-31.1 C (-24.0 F)
1939
-30.0 C (-22.0 F)
1940
-29.4 C (-20.9 F)
1941
-31.1 C (-24.0 F)
1942
-33.9 C (-29.0 F)
1943
-31.7 C (-25.1 F)
1944
-28.9 C (-20.0 F)
1945
-33.3 C (-27.9 F)
1946
-31.1 C (-24.0 F)
1947
-26.7 C (-16.1 F)
1948
-30.6 C (-23.1 F)
1949
-26.7 C (-16.1 F)
1950
-31.7 C (-25.1 F)
1951
-34.4 C (-29.9 F)
1952
-28.9 C (-20.0 F)
1953
-28.9 C (-20.0 F)
1954
-32.8 C (-27.0 F)
1955
-35.0 C (-31.0 F)
1956
-28.9 C (-20.0 F)
1957
-35.0 C (-31.0 F)
1958
-29.4 C (-20.9 F)
1959
-32.2 C (-26.0 F)
1960
-32.8 C (-27.0 F)
1961
-32.8 C (-27.0 F)
1962
-35.0 C (-31.0 F)
1963
-32.8 C (-27.0 F)
1964
-28.3 C (-18.9 F)
1965
-32.2 C (-26.0 F)
1966
-31.1 C (-24.0 F)
1967
-33.3 C (-27.9 F)
1968
-32.8 C (-27.0 F)
1969
-25.0 C (-13.0 F)
1970
-31.1 C (-24.0 F)
Wettest day (Rx1day)
The wettest day of the year at Armagh, 1916 to 1970. The record is 116.1 mm (4.6 in) in 1922, marked on the chart; the median year is 45.0 mm (1.8 in).
Wettest day (Rx1day) at Armagh by year
Year
Wettest day (Rx1day)
1916
34.0 mm (1.3 in)
1917
41.4 mm (1.6 in)
1918
74.2 mm (2.9 in)
1919
55.9 mm (2.2 in)
1920
63.5 mm (2.5 in)
1921
38.1 mm (1.5 in)
1922
116.1 mm (4.6 in)
1923
63.5 mm (2.5 in)
1924
67.3 mm (2.6 in)
1925
50.8 mm (2.0 in)
1926
50.8 mm (2.0 in)
1927
38.1 mm (1.5 in)
1928
66.0 mm (2.6 in)
1929
48.3 mm (1.9 in)
1930
50.8 mm (2.0 in)
1931
40.6 mm (1.6 in)
1932
50.3 mm (2.0 in)
1933
71.1 mm (2.8 in)
1934
47.8 mm (1.9 in)
1935
52.1 mm (2.1 in)
1936
35.6 mm (1.4 in)
1937
51.3 mm (2.0 in)
1938
30.5 mm (1.2 in)
1939
49.5 mm (1.9 in)
1940
35.1 mm (1.4 in)
1941
43.7 mm (1.7 in)
1942
39.9 mm (1.6 in)
1943
29.2 mm (1.1 in)
1944
33.0 mm (1.3 in)
1945
44.5 mm (1.8 in)
1946
45.7 mm (1.8 in)
1947
36.8 mm (1.4 in)
1948
36.3 mm (1.4 in)
1949
52.8 mm (2.1 in)
1950
63.2 mm (2.5 in)
1951
64.8 mm (2.6 in)
1952
43.2 mm (1.7 in)
1953
27.2 mm (1.1 in)
1954
55.9 mm (2.2 in)
1955
47.5 mm (1.9 in)
1956
43.2 mm (1.7 in)
1957
50.8 mm (2.0 in)
1958
43.2 mm (1.7 in)
1959
44.5 mm (1.8 in)
1960
58.4 mm (2.3 in)
1961
40.6 mm (1.6 in)
1962
34.3 mm (1.4 in)
1963
47.8 mm (1.9 in)
1964
33.8 mm (1.3 in)
1965
38.6 mm (1.5 in)
1966
40.6 mm (1.6 in)
1967
55.4 mm (2.2 in)
1968
45.0 mm (1.8 in)
1969
31.2 mm (1.2 in)
1970
18.0 mm (0.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Armagh, 1916 to 1970. The record is 143.3 mm (5.6 in) in 1922, marked on the chart; the median year is 69.9 mm (2.8 in).
Wettest five days (Rx5day) at Armagh by year
Year
Wettest five days (Rx5day)
1916
71.6 mm (2.8 in)
1917
72.9 mm (2.9 in)
1918
100.4 mm (4.0 in)
1919
73.6 mm (2.9 in)
1920
63.5 mm (2.5 in)
1921
70.9 mm (2.8 in)
1922
143.3 mm (5.6 in)
1923
101.6 mm (4.0 in)
1924
67.3 mm (2.6 in)
1925
81.3 mm (3.2 in)
1926
59.9 mm (2.4 in)
1927
60.9 mm (2.4 in)
1928
78.0 mm (3.1 in)
1929
66.1 mm (2.6 in)
1930
99.1 mm (3.9 in)
1931
61.2 mm (2.4 in)
1932
89.4 mm (3.5 in)
1933
78.2 mm (3.1 in)
1934
78.8 mm (3.1 in)
1935
63.0 mm (2.5 in)
1936
48.0 mm (1.9 in)
1937
69.9 mm (2.8 in)
1938
59.7 mm (2.4 in)
1939
86.6 mm (3.4 in)
1940
86.2 mm (3.4 in)
1941
57.1 mm (2.2 in)
1942
105.8 mm (4.2 in)
1943
51.9 mm (2.0 in)
1944
56.8 mm (2.2 in)
1945
58.0 mm (2.3 in)
1946
45.7 mm (1.8 in)
1947
60.5 mm (2.4 in)
1948
69.3 mm (2.7 in)
1949
70.6 mm (2.8 in)
1950
69.6 mm (2.7 in)
1951
81.5 mm (3.2 in)
1952
92.4 mm (3.6 in)
1953
61.5 mm (2.4 in)
1954
70.5 mm (2.8 in)
1955
52.6 mm (2.1 in)
1956
67.6 mm (2.7 in)
1957
69.1 mm (2.7 in)
1958
80.8 mm (3.2 in)
1959
70.7 mm (2.8 in)
1960
90.1 mm (3.5 in)
1961
81.2 mm (3.2 in)
1962
54.1 mm (2.1 in)
1963
52.1 mm (2.1 in)
1964
45.0 mm (1.8 in)
1965
102.7 mm (4.0 in)
1966
73.7 mm (2.9 in)
1967
69.4 mm (2.7 in)
1968
50.9 mm (2.0 in)
1969
71.8 mm (2.8 in)
1970
26.6 mm (1.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Armagh, 1916 to 1970. The record is 30 days in 1930, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Armagh by year
Year
Longest dry spell (CDD)
1916
11 days
1917
11 days
1918
16 days
1919
18 days
1920
16 days
1921
22 days
1922
15 days
1923
18 days
1924
14 days
1925
17 days
1926
23 days
1927
21 days
1928
12 days
1929
28 days
1930
30 days
1931
25 days
1932
26 days
1933
21 days
1934
14 days
1935
15 days
1936
15 days
1937
18 days
1938
15 days
1939
22 days
1940
15 days
1941
13 days
1942
11 days
1943
10 days
1944
16 days
1945
13 days
1946
11 days
1947
20 days
1948
16 days
1949
11 days
1950
12 days
1951
12 days
1952
10 days
1953
15 days
1954
11 days
1955
11 days
1956
16 days
1957
15 days
1958
9 days
1959
12 days
1960
9 days
1961
17 days
1962
17 days
1963
10 days
1964
13 days
1965
12 days
1966
15 days
1967
11 days
1968
17 days
1969
14 days
1970
8 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
46 years with a frost
Across 46 years with a frost, the median last spring frost at Armagh falls on 26 May and the median first autumn frost on 19 September, which leaves a median of 116 days between them.
Fitted over all years, the growing season changes by -1.0 days per decade at this station.
Frost dates and growing season at Armagh
Measure
Median, all years
Earliest period
Recent period (1939 to 1969)
Recent against earliest
Fitted trend
Last spring frost
26 May
n/a
27 May
n/a
-0.1 days per decade
First autumn frost
19 September
n/a
17 September
n/a
-1.1 days per decade
Growing days
116 days
n/a
114 days
n/a
-1.0 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
48 years, 1919 to 1969
A day with at least 45.5 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 93.3 mm (3.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Armagh: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
45.5 mm (1.8 in)
5 years
57.4 mm (2.3 in)
10 years
65.6 mm (2.6 in)
25 years
76.4 mm (3.0 in)
50 years
84.7 mm (3.3 in)
Longer than the 48 years of record
100 years
93.3 mm (3.7 in)
Longer than the 48 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, 48 years of values from 1919 to 1969.
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: 116.1 mm (4.6 in) in 1922; 71.1 mm (2.8 in) in 1933; 67.3 mm (2.6 in) in 1924.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Armagh, at 1940 and 1959. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1940 ran 0.7 C (1.2 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1959 ran 0.3 C (0.5 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Armagh, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1940
-0.7
-1.2
likely
5
1959
+0.3
+0.5
possible
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Armagh standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Armagh 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.