Record envelope, standing records and threshold days for Aroostook (CA008100300), New Brunswick, Canada, with 96 years of record.
Key Facts for Aroostook
Aroostook (CA008100300) is a weather station in New Brunswick, Canada at 46.72 latitude and -67.72 longitude, 80 m (262 ft) above sea level.
The station reports from 1929 to 2024, 96 years of record.
1,464 records set at Aroostook still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Aroostook set a daily record high minimum temperature of -0.5 C (31.1 F) on 16 December 1983.
About the Station
Location: New Brunswick, Canada, 46.72 latitude, -67.72 longitude.
Elevation: 80 m (262 ft).
Period of record: 1929 to 2024, 96 years.
Eligible elements: tmax, tmin, prcp, snow.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Aroostook. 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 Aroostook, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.8 C (55.0 F)
-43.9 C (-47.0 F)
n/a
n/a
Feb
13.3 C (55.9 F)
-42.2 C (-44.0 F)
n/a
n/a
Mar
23.9 C (75.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Apr
27.2 C (81.0 F)
-22.2 C (-8.0 F)
n/a
n/a
May
33.9 C (93.0 F)
-11.1 C (12.0 F)
n/a
n/a
Jun
36.1 C (97.0 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
35.6 C (96.1 F)
1.7 C (35.1 F)
n/a
n/a
Aug
37.2 C (99.0 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
32.8 C (91.0 F)
-6.7 C (19.9 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-13.9 C (7.0 F)
n/a
n/a
Nov
21.1 C (70.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Dec
16.1 C (61.0 F)
-42.8 C (-45.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Aroostook still stand. 1947 holds the most, with 72.
Standing records at Aroostook by the year they were set
Year set
Standing records
1929
16
1930
32
1931
30
1932
29
1933
40
1934
47
1935
26
1936
35
1937
31
1938
30
1939
32
1940
22
1941
17
1942
28
1943
22
1947
72
1948
33
1949
37
1950
38
1951
24
1952
15
1953
34
1954
30
1955
15
1956
27
1957
34
1958
33
1959
20
1960
20
1961
28
1962
25
1963
28
1964
33
1965
23
1966
28
1967
24
1968
23
1969
21
1970
23
1971
21
1972
15
1973
24
1974
23
1975
23
1976
40
1977
21
1978
21
1979
44
1980
14
1981
33
1982
31
1983
29
All-Time Record Progression
1 new records
1 all-time records were set at Aroostook between 24 June 1975 and 24 June 1975. Each dot is a new record.
When Aroostook set new all-time records
Date
Kind
Detail
1975-06-24
Record high minimum temperature
Record high minimum temperature 24.4 C (75.9 F)
Wettest Day of Each Month
Sep: 120.4 mm (4.7 in)
The wettest day on record for each calendar month at Aroostook. The most was 120.4 mm (4.7 in) on 11 September 1954.
Record daily precipitation for each month at Aroostook
Month
Record daily precipitation (mm)
Date
Jan
47.1 mm (1.9 in)
4 January 1982
Feb
73.7 mm (2.9 in)
12 February 1952
Mar
39.8 mm (1.6 in)
2 March 1983
Apr
71.1 mm (2.8 in)
17 April 1954
May
64.0 mm (2.5 in)
27 May 1961
Jun
118.1 mm (4.6 in)
30 June 1941
Jul
110.7 mm (4.4 in)
24 July 1933
Aug
83.4 mm (3.3 in)
17 August 1981
Sep
120.4 mm (4.7 in)
11 September 1954
Oct
66.6 mm (2.6 in)
23 October 1981
Nov
51.6 mm (2.0 in)
5 November 1982
Dec
61.2 mm (2.4 in)
16 December 1960
Period of Record Coverage
1929 to 1983
Complete yearUnder 90 percent of days
52 years of record at Aroostook, 1929 to 1983. 5 years have data for under 90 percent of days and are left out of rankings: 1929, 1940, 1941, 1943, 1965.
Cooler than the station meanWarmer than the station mean
One stripe for each of 46 complete years at Aroostook, 1930 to 1983. Blue stripes are years cooler than the station's own mean of 4.1 C (39.3 F); red stripes are warmer. The coolest year was 1939, at 2.6 C (36.6 F), and the warmest was 1953, at 5.6 C (42.0 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Aroostook as warming stripes, 1930 to 1983
Year
Annual mean temperature
Difference from the station mean
1930
4.0 C
-0.08 C
1931
5.0 C
+0.96 C
1932
4.4 C
+0.32 C
1933
3.3 C
-0.81 C
1934
2.7 C
-1.40 C
1935
3.2 C
-0.90 C
1936
3.4 C
-0.62 C
1937
4.9 C
+0.84 C
1938
3.7 C
-0.41 C
1939
2.6 C
-1.49 C
1947
4.6 C
+0.57 C
1948
4.0 C
-0.03 C
1949
4.8 C
+0.75 C
1950
4.2 C
+0.10 C
1951
4.6 C
+0.58 C
1952
4.9 C
+0.88 C
1953
5.6 C
+1.49 C
1954
4.3 C
+0.21 C
1955
4.0 C
-0.02 C
1956
3.4 C
-0.64 C
1957
4.1 C
+0.04 C
1958
3.8 C
-0.24 C
1959
3.8 C
-0.28 C
1960
4.8 C
+0.75 C
1961
4.1 C
+0.04 C
1962
3.6 C
-0.47 C
1963
3.5 C
-0.60 C
1964
3.8 C
-0.22 C
1966
4.8 C
+0.77 C
1967
3.6 C
-0.50 C
1968
3.8 C
-0.31 C
1969
4.7 C
+0.64 C
1970
3.8 C
-0.28 C
1971
3.8 C
-0.24 C
1972
2.8 C
-1.23 C
1973
5.2 C
+1.10 C
1974
3.3 C
-0.78 C
1975
4.1 C
+0.06 C
1976
3.3 C
-0.80 C
1977
4.0 C
-0.11 C
1978
3.4 C
-0.63 C
1979
5.2 C
+1.14 C
1980
3.7 C
-0.39 C
1981
5.2 C
+1.15 C
1982
3.8 C
-0.24 C
1983
5.3 C
+1.23 C
The fitted trend in annual mean temperature here over 1930 to 1983 is 0.1 C (-0.1 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) 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 Aroostook
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.3) per decade
1930 to 1983
46
Not clearly different from zero
Mean daily maximum
-0.12 C (-0.26 to 0.02) per decade
-0.22 F (-0.48 to 0.03) per decade
1930 to 1983
46
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.1 to 0.7) per decade
1930 to 1983
46
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
1929 to 1983
Yearly extremes at Aroostook: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.2 C (99.0 F)
1935
32.8 C (91.0 F)
52
Coldest night (TNn)
-43.9 C (-47.0 F)
1935
-35.3 C (-31.5 F)
52
Wettest day (Rx1day)
120.4 mm (4.7 in)
1954
50.1 mm (2.0 in)
52
Wettest five days (Rx5day)
154.4 mm (6.1 in)
1969
78.6 mm (3.1 in)
52
Longest dry spell (CDD)
21 days
1962
14 days
52
Hottest day (TXx)
The hottest day of the year at Aroostook, 1929 to 1983. The record is 37.2 C (99.0 F) in 1935, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at Aroostook by year
Year
Hottest day (TXx)
1929
30.6 C (87.1 F)
1930
33.9 C (93.0 F)
1931
32.8 C (91.0 F)
1932
33.3 C (91.9 F)
1933
31.7 C (89.1 F)
1934
30.0 C (86.0 F)
1935
37.2 C (99.0 F)
1936
29.4 C (84.9 F)
1937
33.9 C (93.0 F)
1938
33.9 C (93.0 F)
1939
32.8 C (91.0 F)
1940
32.2 C (90.0 F)
1941
28.3 C (82.9 F)
1942
32.2 C (90.0 F)
1943
30.0 C (86.0 F)
1947
37.2 C (99.0 F)
1948
33.9 C (93.0 F)
1949
36.1 C (97.0 F)
1950
32.2 C (90.0 F)
1951
31.7 C (89.1 F)
1952
35.0 C (95.0 F)
1953
32.8 C (91.0 F)
1954
31.1 C (88.0 F)
1955
35.6 C (96.1 F)
1956
32.2 C (90.0 F)
1957
32.8 C (91.0 F)
1958
30.6 C (87.1 F)
1959
33.3 C (91.9 F)
1960
33.3 C (91.9 F)
1961
33.3 C (91.9 F)
1962
31.7 C (89.1 F)
1963
33.9 C (93.0 F)
1964
33.9 C (93.0 F)
1965
32.2 C (90.0 F)
1966
30.6 C (87.1 F)
1967
32.8 C (91.0 F)
1968
33.3 C (91.9 F)
1969
33.3 C (91.9 F)
1970
32.2 C (90.0 F)
1971
30.6 C (87.1 F)
1972
31.7 C (89.1 F)
1973
31.1 C (88.0 F)
1974
30.0 C (86.0 F)
1975
34.4 C (93.9 F)
1976
32.8 C (91.0 F)
1977
33.9 C (93.0 F)
1978
31.7 C (89.1 F)
1979
32.2 C (90.0 F)
1980
30.6 C (87.1 F)
1981
31.5 C (88.7 F)
1982
33.0 C (91.4 F)
1983
34.5 C (94.1 F)
Coldest night (TNn)
The coldest night of the year at Aroostook, 1929 to 1983. The record is -43.9 C (-47.0 F) in 1935, marked on the chart; the median year is -35.3 C (-31.5 F).
Coldest night (TNn) at Aroostook by year
Year
Coldest night (TNn)
1929
-28.9 C (-20.0 F)
1930
-37.2 C (-35.0 F)
1931
-41.1 C (-42.0 F)
1932
-31.1 C (-24.0 F)
1933
-42.8 C (-45.0 F)
1934
-38.9 C (-38.0 F)
1935
-43.9 C (-47.0 F)
1936
-33.3 C (-27.9 F)
1937
-35.0 C (-31.0 F)
1938
-36.7 C (-34.1 F)
1939
-32.8 C (-27.0 F)
1940
-33.3 C (-27.9 F)
1941
-35.0 C (-31.0 F)
1942
-35.6 C (-32.1 F)
1943
-42.2 C (-44.0 F)
1947
-35.0 C (-31.0 F)
1948
-40.0 C (-40.0 F)
1949
-35.0 C (-31.0 F)
1950
-32.2 C (-26.0 F)
1951
-35.0 C (-31.0 F)
1952
-35.6 C (-32.1 F)
1953
-26.1 C (-15.0 F)
1954
-35.0 C (-31.0 F)
1955
-38.9 C (-38.0 F)
1956
-31.7 C (-25.1 F)
1957
-40.0 C (-40.0 F)
1958
-32.2 C (-26.0 F)
1959
-33.9 C (-29.0 F)
1960
-33.9 C (-29.0 F)
1961
-37.2 C (-35.0 F)
1962
-38.3 C (-36.9 F)
1963
-36.7 C (-34.1 F)
1964
-32.8 C (-27.0 F)
1965
-33.3 C (-27.9 F)
1966
-38.9 C (-38.0 F)
1967
-38.3 C (-36.9 F)
1968
-36.1 C (-33.0 F)
1969
-31.1 C (-24.0 F)
1970
-35.0 C (-31.0 F)
1971
-37.8 C (-36.0 F)
1972
-35.0 C (-31.0 F)
1973
-35.6 C (-32.1 F)
1974
-35.6 C (-32.1 F)
1975
-37.2 C (-35.0 F)
1976
-37.2 C (-35.0 F)
1977
-35.6 C (-32.1 F)
1978
-30.6 C (-23.1 F)
1979
-35.6 C (-32.1 F)
1980
-34.4 C (-29.9 F)
1981
-36.1 C (-33.0 F)
1982
-34.5 C (-30.1 F)
1983
-28.5 C (-19.3 F)
Wettest day (Rx1day)
The wettest day of the year at Aroostook, 1929 to 1983. The record is 120.4 mm (4.7 in) in 1954, marked on the chart; the median year is 50.1 mm (2.0 in).
Wettest day (Rx1day) at Aroostook by year
Year
Wettest day (Rx1day)
1929
40.1 mm (1.6 in)
1930
65.3 mm (2.6 in)
1931
44.7 mm (1.8 in)
1932
62.5 mm (2.5 in)
1933
110.7 mm (4.4 in)
1934
55.6 mm (2.2 in)
1935
35.6 mm (1.4 in)
1936
49.8 mm (2.0 in)
1937
47.2 mm (1.9 in)
1938
50.5 mm (2.0 in)
1939
56.1 mm (2.2 in)
1940
37.3 mm (1.5 in)
1941
118.1 mm (4.6 in)
1942
62.5 mm (2.5 in)
1943
39.1 mm (1.5 in)
1947
32.8 mm (1.3 in)
1948
45.5 mm (1.8 in)
1949
42.7 mm (1.7 in)
1950
54.6 mm (2.1 in)
1951
40.9 mm (1.6 in)
1952
73.7 mm (2.9 in)
1953
49.0 mm (1.9 in)
1954
120.4 mm (4.7 in)
1955
58.7 mm (2.3 in)
1956
41.7 mm (1.6 in)
1957
37.8 mm (1.5 in)
1958
59.4 mm (2.3 in)
1959
52.8 mm (2.1 in)
1960
61.2 mm (2.4 in)
1961
64.0 mm (2.5 in)
1962
50.3 mm (2.0 in)
1963
46.7 mm (1.8 in)
1964
30.5 mm (1.2 in)
1965
51.8 mm (2.0 in)
1966
47.8 mm (1.9 in)
1967
50.8 mm (2.0 in)
1968
35.6 mm (1.4 in)
1969
78.7 mm (3.1 in)
1970
47.5 mm (1.9 in)
1971
35.6 mm (1.4 in)
1972
57.2 mm (2.3 in)
1973
55.4 mm (2.2 in)
1974
43.2 mm (1.7 in)
1975
47.5 mm (1.9 in)
1976
65.5 mm (2.6 in)
1977
41.4 mm (1.6 in)
1978
81.0 mm (3.2 in)
1979
42.9 mm (1.7 in)
1980
36.8 mm (1.4 in)
1981
83.4 mm (3.3 in)
1982
51.6 mm (2.0 in)
1983
41.2 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Aroostook, 1929 to 1983. The record is 154.4 mm (6.1 in) in 1969, marked on the chart; the median year is 78.6 mm (3.1 in).
Wettest five days (Rx5day) at Aroostook by year
Year
Wettest five days (Rx5day)
1929
63.1 mm (2.5 in)
1930
131.1 mm (5.2 in)
1931
78.8 mm (3.1 in)
1932
57.4 mm (2.3 in)
1933
117.3 mm (4.6 in)
1934
65.8 mm (2.6 in)
1935
85.3 mm (3.4 in)
1936
78.5 mm (3.1 in)
1937
67.3 mm (2.6 in)
1938
78.7 mm (3.1 in)
1939
76.4 mm (3.0 in)
1940
74.3 mm (2.9 in)
1941
60.7 mm (2.4 in)
1942
96.1 mm (3.8 in)
1943
60.7 mm (2.4 in)
1947
43.7 mm (1.7 in)
1948
69.6 mm (2.7 in)
1949
85.4 mm (3.4 in)
1950
59.7 mm (2.4 in)
1951
67.3 mm (2.6 in)
1952
86.6 mm (3.4 in)
1953
74.0 mm (2.9 in)
1954
123.2 mm (4.9 in)
1955
82.0 mm (3.2 in)
1956
45.7 mm (1.8 in)
1957
66.8 mm (2.6 in)
1958
90.4 mm (3.6 in)
1959
99.1 mm (3.9 in)
1960
79.0 mm (3.1 in)
1961
128.5 mm (5.1 in)
1962
68.8 mm (2.7 in)
1963
71.6 mm (2.8 in)
1964
83.8 mm (3.3 in)
1965
58.9 mm (2.3 in)
1966
65.4 mm (2.6 in)
1967
98.5 mm (3.9 in)
1968
58.9 mm (2.3 in)
1969
154.4 mm (6.1 in)
1970
59.0 mm (2.3 in)
1971
46.5 mm (1.8 in)
1972
71.9 mm (2.8 in)
1973
137.2 mm (5.4 in)
1974
84.6 mm (3.3 in)
1975
80.2 mm (3.2 in)
1976
91.8 mm (3.6 in)
1977
107.7 mm (4.2 in)
1978
123.4 mm (4.9 in)
1979
52.1 mm (2.1 in)
1980
48.0 mm (1.9 in)
1981
104.6 mm (4.1 in)
1982
93.5 mm (3.7 in)
1983
79.0 mm (3.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Aroostook, 1929 to 1983. The record is 21 days in 1962, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at Aroostook by year
Year
Longest dry spell (CDD)
1929
11 days
1930
19 days
1931
11 days
1932
18 days
1933
11 days
1934
12 days
1935
15 days
1936
9 days
1937
14 days
1938
14 days
1939
17 days
1940
10 days
1941
14 days
1942
15 days
1943
10 days
1947
19 days
1948
16 days
1949
12 days
1950
18 days
1951
15 days
1952
14 days
1953
15 days
1954
15 days
1955
17 days
1956
12 days
1957
11 days
1958
10 days
1959
11 days
1960
13 days
1961
17 days
1962
21 days
1963
12 days
1964
14 days
1965
18 days
1966
12 days
1967
21 days
1968
10 days
1969
17 days
1970
11 days
1971
8 days
1972
13 days
1973
10 days
1974
9 days
1975
18 days
1976
13 days
1977
11 days
1978
14 days
1979
15 days
1980
11 days
1981
16 days
1982
18 days
1983
13 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 Aroostook falls on 28 May and the median first autumn frost on 17 September, which leaves a median of 113 days between them.
Fitted over all years, the growing season changes by +2.5 days per decade at this station.
Frost dates and growing season at Aroostook
Measure
Median, all years
Earliest period
Recent period (1953 to 1983)
Recent against earliest
Fitted trend
Last spring frost
28 May
n/a
28 May
n/a
-1.4 days per decade
First autumn frost
17 September
n/a
19 September
n/a
+1.1 days per decade
Growing days
113 days
n/a
115 days
n/a
+2.5 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
47 years, 1930 to 1983
A day with at least 50.0 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 122.4 mm (4.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Aroostook: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
50.0 mm (2.0 in)
5 years
64.4 mm (2.5 in)
10 years
75.7 mm (3.0 in)
25 years
92.2 mm (3.6 in)
50 years
106.4 mm (4.2 in)
Longer than the 47 years of record
100 years
122.4 mm (4.8 in)
Longer than the 47 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, 47 years of values from 1930 to 1983.
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: 120.4 mm (4.7 in) in 1954; 110.7 mm (4.4 in) in 1933; 83.4 mm (3.3 in) in 1981.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Aroostook, at 1947. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1947 ran 0.2 C (0.3 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Aroostook, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1947
+0.2
+0.3
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 Aroostook standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Aroostook 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.