Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Armstrong (Aut). 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 Armstrong (Aut), with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
5.0 C (41.0 F)
-50.0 C (-58.0 F)
n/a
n/a
Feb
10.0 C (50.0 F)
-47.8 C (-54.0 F)
n/a
n/a
Mar
16.1 C (61.0 F)
-45.6 C (-50.1 F)
n/a
n/a
Apr
27.8 C (82.0 F)
-35.0 C (-31.0 F)
n/a
n/a
May
34.5 C (94.1 F)
-16.1 C (3.0 F)
n/a
n/a
Jun
35.6 C (96.1 F)
-6.7 C (19.9 F)
n/a
n/a
Jul
38.3 C (100.9 F)
-5.6 C (21.9 F)
n/a
n/a
Aug
36.7 C (98.1 F)
-3.9 C (25.0 F)
n/a
n/a
Sep
31.7 C (89.1 F)
-11.7 C (10.9 F)
n/a
n/a
Oct
27.2 C (81.0 F)
-21.7 C (-7.1 F)
n/a
n/a
Nov
20.6 C (69.1 F)
-36.7 C (-34.1 F)
n/a
n/a
Dec
10.0 C (50.0 F)
-49.4 C (-56.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Armstrong (Aut) still stand. 1964 holds the most, with 54.
Standing records at Armstrong (Aut) by the year they were set
Year set
Standing records
1938
15
1939
33
1940
40
1941
35
1942
35
1943
42
1944
41
1945
42
1946
37
1947
29
1948
31
1949
30
1950
32
1951
50
1952
24
1953
33
1954
26
1955
29
1956
33
1957
21
1958
37
1959
41
1960
20
1961
22
1962
35
1963
43
1964
54
1965
35
1966
32
1967
37
1968
31
1969
30
1970
23
1971
33
1972
36
1973
21
1974
31
1975
35
1976
29
1977
32
1978
18
1979
27
1980
34
1981
41
1982
29
All-Time Record Progression
1 new records
1 all-time records were set at Armstrong (Aut) between 30 July 1975 and 30 July 1975. Each dot is a new record.
When Armstrong (Aut) set new all-time records
Date
Kind
Detail
1975-07-30
Record high maximum temperature
Record high maximum temperature 38.3 C (100.9 F)
Wettest Day of Each Month
Sep: 99.3 mm (3.9 in)
The wettest day on record for each calendar month at Armstrong (Aut). The most was 99.3 mm (3.9 in) on 20 September 1941.
Record daily precipitation for each month at Armstrong (Aut)
Month
Record daily precipitation (mm)
Date
Jan
34.0 mm (1.3 in)
23 January 1969
Feb
28.2 mm (1.1 in)
9 February 1939
Mar
26.9 mm (1.1 in)
7 March 1973
Apr
37.3 mm (1.5 in)
29 April 1940
May
62.7 mm (2.5 in)
31 May 1969
Jun
58.8 mm (2.3 in)
28 June 1977
Jul
63.8 mm (2.5 in)
5 July 1982
Aug
48.0 mm (1.9 in)
24 August 1968
Sep
99.3 mm (3.9 in)
20 September 1941
Oct
45.5 mm (1.8 in)
24 October 1975
Nov
41.7 mm (1.6 in)
7 November 1947
Dec
26.4 mm (1.0 in)
31 December 1965
Period of Record Coverage
1938 to 1982
Complete yearUnder 90 percent of days
45 years of record at Armstrong (Aut), 1938 to 1982. 1 years have data for under 90 percent of days and are left out of rankings: 1938.
Cooler than the station meanWarmer than the station mean
One stripe for each of 42 complete years at Armstrong (Aut), 1939 to 1982. Blue stripes are years cooler than the station's own mean of -0.9 C (30.3 F); red stripes are warmer. The coolest year was 1972, at -3.0 C (26.6 F), and the warmest was 1944, at 0.7 C (33.2 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Armstrong (Aut) as warming stripes, 1939 to 1982
Year
Annual mean temperature
Difference from the station mean
1939
0.0 C
+0.89 C
1940
0.5 C
+1.39 C
1943
-0.9 C
+0.03 C
1944
0.7 C
+1.58 C
1945
-0.7 C
+0.18 C
1946
-0.4 C
+0.48 C
1947
-0.3 C
+0.61 C
1948
0.0 C
+0.88 C
1949
-0.8 C
+0.12 C
1950
-2.7 C
-1.74 C
1951
-1.3 C
-0.40 C
1952
0.1 C
+1.01 C
1953
0.5 C
+1.45 C
1954
-0.6 C
+0.28 C
1955
0.0 C
+0.93 C
1956
-1.3 C
-0.38 C
1957
-1.1 C
-0.18 C
1958
-0.8 C
+0.14 C
1959
-1.1 C
-0.22 C
1960
-0.7 C
+0.25 C
1961
-0.2 C
+0.70 C
1962
-1.3 C
-0.42 C
1963
-1.0 C
-0.07 C
1964
-1.5 C
-0.60 C
1965
-2.0 C
-1.08 C
1966
-1.8 C
-0.83 C
1967
-1.9 C
-0.98 C
1968
-0.4 C
+0.51 C
1969
-1.0 C
-0.10 C
1970
-1.3 C
-0.42 C
1971
-1.1 C
-0.18 C
1972
-3.0 C
-2.07 C
1973
-0.5 C
+0.47 C
1974
-2.4 C
-1.50 C
1975
-0.8 C
+0.15 C
1976
-1.6 C
-0.70 C
1977
0.2 C
+1.13 C
1978
-1.8 C
-0.87 C
1979
-1.7 C
-0.79 C
1980
-1.3 C
-0.39 C
1981
0.5 C
+1.43 C
1982
-1.8 C
-0.89 C
The annual mean temperature here has fallen by 0.3 C (0.1 to 0.5) per decade over 1939 to 1982. In Fahrenheit: 0.5 F (0.2 to 0.9) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Armstrong (Aut)
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.3 C (-0.5 to -0.1) per decade
-0.5 F (-0.9 to -0.2) per decade
1939 to 1982
42
Fall
Mean daily maximum
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.5 to 0.1) per decade
1939 to 1982
42
Not clearly different from zero
Mean daily minimum
-0.5 C (-0.7 to -0.2) per decade
-0.9 F (-1.3 to -0.4) per decade
1939 to 1982
42
Fall
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
1938 to 1982
Yearly extremes at Armstrong (Aut): the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.3 C (100.9 F)
1975
31.7 C (89.1 F)
45
Coldest night (TNn)
-50.0 C (-58.0 F)
1957
-43.9 C (-47.0 F)
45
Wettest day (Rx1day)
99.3 mm (3.9 in)
1941
40.4 mm (1.6 in)
45
Wettest five days (Rx5day)
159.3 mm (6.3 in)
1941
59.4 mm (2.3 in)
45
Longest dry spell (CDD)
43 days
1969
18 days
45
Hottest day (TXx)
The hottest day of the year at Armstrong (Aut), 1938 to 1982. The record is 38.3 C (100.9 F) in 1975, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Armstrong (Aut) by year
Year
Hottest day (TXx)
1938
27.2 C (81.0 F)
1939
30.6 C (87.1 F)
1940
35.0 C (95.0 F)
1941
35.6 C (96.1 F)
1942
31.7 C (89.1 F)
1943
34.4 C (93.9 F)
1944
34.4 C (93.9 F)
1945
35.6 C (96.1 F)
1946
30.0 C (86.0 F)
1947
35.0 C (95.0 F)
1948
33.3 C (91.9 F)
1949
36.7 C (98.1 F)
1950
30.6 C (87.1 F)
1951
31.1 C (88.0 F)
1952
31.1 C (88.0 F)
1953
30.6 C (87.1 F)
1954
29.4 C (84.9 F)
1955
33.9 C (93.0 F)
1956
35.0 C (95.0 F)
1957
30.6 C (87.1 F)
1958
31.1 C (88.0 F)
1959
31.7 C (89.1 F)
1960
31.1 C (88.0 F)
1961
32.8 C (91.0 F)
1962
31.1 C (88.0 F)
1963
33.9 C (93.0 F)
1964
34.4 C (93.9 F)
1965
29.4 C (84.9 F)
1966
32.2 C (90.0 F)
1967
30.6 C (87.1 F)
1968
29.4 C (84.9 F)
1969
32.2 C (90.0 F)
1970
32.8 C (91.0 F)
1971
32.8 C (91.0 F)
1972
32.8 C (91.0 F)
1973
30.6 C (87.1 F)
1974
31.7 C (89.1 F)
1975
38.3 C (100.9 F)
1976
32.8 C (91.0 F)
1977
31.7 C (89.1 F)
1978
31.0 C (87.8 F)
1979
31.6 C (88.9 F)
1980
34.5 C (94.1 F)
1981
35.6 C (96.1 F)
1982
30.4 C (86.7 F)
Coldest night (TNn)
The coldest night of the year at Armstrong (Aut), 1938 to 1982. The record is -50.0 C (-58.0 F) in 1957, marked on the chart; the median year is -43.9 C (-47.0 F).
Coldest night (TNn) at Armstrong (Aut) by year
Year
Coldest night (TNn)
1938
-33.9 C (-29.0 F)
1939
-42.8 C (-45.0 F)
1940
-39.4 C (-38.9 F)
1941
-41.1 C (-42.0 F)
1942
-41.1 C (-42.0 F)
1943
-48.9 C (-56.0 F)
1944
-41.7 C (-43.1 F)
1945
-43.3 C (-45.9 F)
1946
-46.1 C (-51.0 F)
1947
-42.2 C (-44.0 F)
1948
-46.1 C (-51.0 F)
1949
-42.8 C (-45.0 F)
1950
-47.8 C (-54.0 F)
1951
-48.3 C (-54.9 F)
1952
-41.7 C (-43.1 F)
1953
-49.4 C (-56.9 F)
1954
-46.7 C (-52.1 F)
1955
-42.2 C (-44.0 F)
1956
-41.1 C (-42.0 F)
1957
-50.0 C (-58.0 F)
1958
-44.4 C (-47.9 F)
1959
-45.0 C (-49.0 F)
1960
-42.8 C (-45.0 F)
1961
-41.7 C (-43.1 F)
1962
-44.4 C (-47.9 F)
1963
-49.4 C (-56.9 F)
1964
-42.8 C (-45.0 F)
1965
-43.9 C (-47.0 F)
1966
-44.4 C (-47.9 F)
1967
-46.1 C (-51.0 F)
1968
-48.3 C (-54.9 F)
1969
-39.4 C (-38.9 F)
1970
-47.2 C (-53.0 F)
1971
-42.8 C (-45.0 F)
1972
-42.8 C (-45.0 F)
1973
-43.3 C (-45.9 F)
1974
-47.8 C (-54.0 F)
1975
-48.9 C (-56.0 F)
1976
-44.4 C (-47.9 F)
1977
-43.3 C (-45.9 F)
1978
-41.0 C (-41.8 F)
1979
-45.0 C (-49.0 F)
1980
-43.9 C (-47.0 F)
1981
-39.7 C (-39.5 F)
1982
-47.7 C (-53.9 F)
Wettest day (Rx1day)
The wettest day of the year at Armstrong (Aut), 1938 to 1982. The record is 99.3 mm (3.9 in) in 1941, marked on the chart; the median year is 40.4 mm (1.6 in).
Wettest day (Rx1day) at Armstrong (Aut) by year
Year
Wettest day (Rx1day)
1938
26.2 mm (1.0 in)
1939
46.2 mm (1.8 in)
1940
37.3 mm (1.5 in)
1941
99.3 mm (3.9 in)
1942
28.7 mm (1.1 in)
1943
58.4 mm (2.3 in)
1944
52.8 mm (2.1 in)
1945
53.8 mm (2.1 in)
1946
33.5 mm (1.3 in)
1947
45.5 mm (1.8 in)
1948
36.8 mm (1.4 in)
1949
25.7 mm (1.0 in)
1950
46.2 mm (1.8 in)
1951
40.4 mm (1.6 in)
1952
42.7 mm (1.7 in)
1953
48.5 mm (1.9 in)
1954
34.8 mm (1.4 in)
1955
29.5 mm (1.2 in)
1956
37.6 mm (1.5 in)
1957
34.0 mm (1.3 in)
1958
25.7 mm (1.0 in)
1959
53.3 mm (2.1 in)
1960
29.7 mm (1.2 in)
1961
26.4 mm (1.0 in)
1962
48.8 mm (1.9 in)
1963
56.4 mm (2.2 in)
1964
37.6 mm (1.5 in)
1965
32.5 mm (1.3 in)
1966
25.7 mm (1.0 in)
1967
22.4 mm (0.9 in)
1968
48.0 mm (1.9 in)
1969
62.7 mm (2.5 in)
1970
47.8 mm (1.9 in)
1971
43.7 mm (1.7 in)
1972
43.4 mm (1.7 in)
1973
33.5 mm (1.3 in)
1974
31.2 mm (1.2 in)
1975
45.5 mm (1.8 in)
1976
47.2 mm (1.9 in)
1977
58.8 mm (2.3 in)
1978
29.2 mm (1.1 in)
1979
46.4 mm (1.8 in)
1980
23.4 mm (0.9 in)
1981
23.5 mm (0.9 in)
1982
63.8 mm (2.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Armstrong (Aut), 1938 to 1982. The record is 159.3 mm (6.3 in) in 1941, marked on the chart; the median year is 59.4 mm (2.3 in).
Wettest five days (Rx5day) at Armstrong (Aut) by year
Year
Wettest five days (Rx5day)
1938
65.1 mm (2.6 in)
1939
57.5 mm (2.3 in)
1940
79.3 mm (3.1 in)
1941
159.3 mm (6.3 in)
1942
35.5 mm (1.4 in)
1943
76.7 mm (3.0 in)
1944
80.0 mm (3.1 in)
1945
113.3 mm (4.5 in)
1946
60.7 mm (2.4 in)
1947
88.9 mm (3.5 in)
1948
54.6 mm (2.1 in)
1949
52.3 mm (2.1 in)
1950
89.9 mm (3.5 in)
1951
53.8 mm (2.1 in)
1952
58.7 mm (2.3 in)
1953
78.7 mm (3.1 in)
1954
56.3 mm (2.2 in)
1955
44.0 mm (1.7 in)
1956
55.9 mm (2.2 in)
1957
63.6 mm (2.5 in)
1958
50.3 mm (2.0 in)
1959
87.1 mm (3.4 in)
1960
47.2 mm (1.9 in)
1961
47.0 mm (1.9 in)
1962
57.5 mm (2.3 in)
1963
94.6 mm (3.7 in)
1964
52.3 mm (2.1 in)
1965
51.3 mm (2.0 in)
1966
56.4 mm (2.2 in)
1967
39.1 mm (1.5 in)
1968
66.3 mm (2.6 in)
1969
94.7 mm (3.7 in)
1970
111.5 mm (4.4 in)
1971
68.2 mm (2.7 in)
1972
67.1 mm (2.6 in)
1973
58.1 mm (2.3 in)
1974
61.0 mm (2.4 in)
1975
86.6 mm (3.4 in)
1976
48.5 mm (1.9 in)
1977
84.8 mm (3.3 in)
1978
59.4 mm (2.3 in)
1979
58.3 mm (2.3 in)
1980
52.4 mm (2.1 in)
1981
33.4 mm (1.3 in)
1982
74.6 mm (2.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Armstrong (Aut), 1938 to 1982. The record is 43 days in 1969, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Armstrong (Aut) by year
Year
Longest dry spell (CDD)
1938
12 days
1939
21 days
1940
14 days
1941
25 days
1942
15 days
1943
19 days
1944
30 days
1945
13 days
1946
17 days
1947
23 days
1948
23 days
1949
11 days
1950
21 days
1951
14 days
1952
12 days
1953
17 days
1954
17 days
1955
17 days
1956
19 days
1957
15 days
1958
32 days
1959
17 days
1960
23 days
1961
26 days
1962
13 days
1963
16 days
1964
15 days
1965
18 days
1966
19 days
1967
22 days
1968
13 days
1969
43 days
1970
16 days
1971
20 days
1972
19 days
1973
20 days
1974
12 days
1975
18 days
1976
25 days
1977
19 days
1978
41 days
1979
16 days
1980
16 days
1981
21 days
1982
18 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
42 years with a frost
Across 42 years with a frost, the median last spring frost at Armstrong (Aut) falls on 21 June and the median first autumn frost on 11 August, which leaves a median of 49 days between them.
Fitted over all years, the growing season changes by -4.0 days per decade at this station.
Frost dates and growing season at Armstrong (Aut)
Measure
Median, all years
Earliest period
Recent period (1953 to 1982)
Recent against earliest
Fitted trend
Last spring frost
21 June
n/a
21 June
n/a
+0.6 days per decade
First autumn frost
11 August
n/a
23 July
n/a
-3.5 days per decade
Growing days
49 days
n/a
35 days
n/a
-4.0 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
44 years, 1939 to 1982
A day with at least 39.6 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 84.9 mm (3.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Armstrong (Aut): the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
39.6 mm (1.6 in)
5 years
52.2 mm (2.1 in)
10 years
60.3 mm (2.4 in)
25 years
70.4 mm (2.8 in)
50 years
77.7 mm (3.1 in)
Longer than the 44 years of record
100 years
84.9 mm (3.3 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 1939 to 1982.
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: 99.3 mm (3.9 in) in 1941; 63.8 mm (2.5 in) in 1982; 62.7 mm (2.5 in) in 1969.
Download the Data
Data for Armstrong (Aut) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Armstrong (Aut) 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.