Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Tweed. 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 Tweed, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
14.4 C (57.9 F)
-37.2 C (-35.0 F)
n/a
n/a
Feb
12.2 C (54.0 F)
-40.0 C (-40.0 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-29.4 C (-20.9 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-17.2 C (1.0 F)
n/a
n/a
May
33.3 C (91.9 F)
-7.2 C (19.0 F)
n/a
n/a
Jun
36.1 C (97.0 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
40.6 C (105.1 F)
4.4 C (39.9 F)
n/a
n/a
Aug
36.7 C (98.1 F)
1.7 C (35.1 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-4.4 C (24.1 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-12.2 C (10.0 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-38.9 C (-38.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Tweed still stand. 1933 holds the most, with 59.
Standing records at Tweed by the year they were set
Year set
Standing records
1925
38
1926
40
1927
28
1928
24
1929
33
1930
29
1931
32
1932
37
1933
59
1934
55
1935
29
1936
50
1937
20
1938
23
1939
27
1940
37
1941
32
1942
26
1943
29
1944
25
1945
22
1946
59
1947
24
1948
30
1949
33
1950
27
1951
27
1952
21
1953
31
1954
37
1955
30
1956
38
1957
34
1958
20
1959
32
1960
13
1961
27
1962
30
1963
27
1964
42
1965
38
1966
24
1967
24
1968
29
1969
21
1970
21
1971
20
1972
10
Wettest Day of Each Month
Aug: 92.7 mm (3.6 in)
The wettest day on record for each calendar month at Tweed. The most was 92.7 mm (3.6 in) on 4 August 1953.
Record daily precipitation for each month at Tweed
Month
Record daily precipitation (mm)
Date
Jan
54.4 mm (2.1 in)
14 January 1940
Feb
48.5 mm (1.9 in)
3 February 1972
Mar
86.6 mm (3.4 in)
17 March 1936
Apr
44.5 mm (1.8 in)
27 April 1956
May
60.5 mm (2.4 in)
11 May 1943
Jun
63.5 mm (2.5 in)
15 June 1956
Jul
71.1 mm (2.8 in)
5 July 1951
Aug
92.7 mm (3.6 in)
4 August 1953
Sep
71.4 mm (2.8 in)
21 September 1938
Oct
74.9 mm (2.9 in)
15 October 1955
Nov
40.4 mm (1.6 in)
13 November 1937
Dec
44.2 mm (1.7 in)
4 December 1961
Period of Record Coverage
1925 to 1972
Complete yearUnder 90 percent of days
48 years of record at Tweed, 1925 to 1972. 8 years have data for under 90 percent of days and are left out of rankings: 1925, 1929, 1944, 1945, 1946, 1949, 1950, 1972.
Cooler than the station meanWarmer than the station mean
One stripe for each of 40 complete years at Tweed, 1926 to 1971. Blue stripes are years cooler than the station's own mean of 6.5 C (43.7 F); red stripes are warmer. The coolest year was 1926, at 4.7 C (40.5 F), and the warmest was 1953, at 8.2 C (46.7 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Tweed as warming stripes, 1926 to 1971
Year
Annual mean temperature
Difference from the station mean
1926
4.7 C
-1.79 C
1927
6.7 C
+0.14 C
1930
7.2 C
+0.71 C
1931
8.1 C
+1.53 C
1932
7.1 C
+0.58 C
1933
6.7 C
+0.22 C
1934
5.6 C
-0.91 C
1935
6.0 C
-0.54 C
1936
6.1 C
-0.44 C
1937
7.4 C
+0.89 C
1938
7.2 C
+0.64 C
1939
6.0 C
-0.56 C
1940
5.3 C
-1.26 C
1941
6.6 C
+0.12 C
1942
6.7 C
+0.13 C
1943
5.8 C
-0.73 C
1947
6.6 C
+0.10 C
1949
7.8 C
+1.27 C
1950
6.4 C
-0.10 C
1951
6.7 C
+0.14 C
1952
7.7 C
+1.14 C
1953
8.2 C
+1.65 C
1954
6.8 C
+0.26 C
1955
7.2 C
+0.64 C
1956
5.9 C
-0.62 C
1957
6.8 C
+0.29 C
1958
5.9 C
-0.65 C
1959
6.8 C
+0.25 C
1960
6.5 C
0.00 C
1961
6.7 C
+0.18 C
1962
6.1 C
-0.43 C
1963
5.9 C
-0.66 C
1964
6.8 C
+0.23 C
1965
5.8 C
-0.73 C
1966
6.4 C
-0.10 C
1967
6.2 C
-0.37 C
1968
6.2 C
-0.28 C
1969
6.5 C
+0.01 C
1970
6.0 C
-0.55 C
1971
6.3 C
-0.27 C
The fitted trend in annual mean temperature here over 1926 to 1971 is -0.04 C (-0.22 to 0.13) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.4 to 0.2) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Tweed
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.04 C (-0.22 to 0.13) per decade
-0.1 F (-0.4 to 0.2) per decade
1926 to 1971
40
Not clearly different from zero
Mean daily maximum
-0.3 C (-0.4 to -0.1) per decade
-0.5 F (-0.8 to -0.1) per decade
1926 to 1971
40
Fall
Mean daily minimum
0.18 C (-0.04 to 0.39) per decade
0.3 F (-0.1 to 0.7) per decade
1926 to 1971
40
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
1925 to 1972
Yearly extremes at Tweed: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1931
33.9 C (93.0 F)
48
Coldest night (TNn)
-40.0 C (-40.0 F)
1934
-30.0 C (-22.0 F)
48
Wettest day (Rx1day)
92.7 mm (3.6 in)
1953
43.9 mm (1.7 in)
47
Wettest five days (Rx5day)
153.1 mm (6.0 in)
1955
67.0 mm (2.6 in)
47
Longest dry spell (CDD)
29 days
1947
15 days
47
Hottest day (TXx)
The hottest day of the year at Tweed, 1925 to 1972. The record is 40.6 C (105.1 F) in 1931, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at Tweed by year
Year
Hottest day (TXx)
1925
34.4 C (93.9 F)
1926
33.9 C (93.0 F)
1927
36.1 C (97.0 F)
1928
33.9 C (93.0 F)
1929
35.6 C (96.1 F)
1930
32.8 C (91.0 F)
1931
40.6 C (105.1 F)
1932
33.3 C (91.9 F)
1933
36.7 C (98.1 F)
1934
35.0 C (95.0 F)
1935
35.6 C (96.1 F)
1936
40.6 C (105.1 F)
1937
36.1 C (97.0 F)
1938
34.4 C (93.9 F)
1939
35.6 C (96.1 F)
1940
32.2 C (90.0 F)
1941
36.1 C (97.0 F)
1942
32.8 C (91.0 F)
1943
31.1 C (88.0 F)
1944
36.1 C (97.0 F)
1945
31.1 C (88.0 F)
1946
32.8 C (91.0 F)
1947
32.2 C (90.0 F)
1948
36.1 C (97.0 F)
1949
36.1 C (97.0 F)
1950
31.1 C (88.0 F)
1951
30.0 C (86.0 F)
1952
33.9 C (93.0 F)
1953
35.0 C (95.0 F)
1954
31.1 C (88.0 F)
1955
36.7 C (98.1 F)
1956
33.9 C (93.0 F)
1957
32.8 C (91.0 F)
1958
31.1 C (88.0 F)
1959
33.9 C (93.0 F)
1960
31.1 C (88.0 F)
1961
31.1 C (88.0 F)
1962
33.3 C (91.9 F)
1963
35.6 C (96.1 F)
1964
34.4 C (93.9 F)
1965
32.2 C (90.0 F)
1966
35.6 C (96.1 F)
1967
30.6 C (87.1 F)
1968
33.9 C (93.0 F)
1969
33.3 C (91.9 F)
1970
32.2 C (90.0 F)
1971
32.8 C (91.0 F)
1972
21.7 C (71.1 F)
Coldest night (TNn)
The coldest night of the year at Tweed, 1925 to 1972. The record is -40.0 C (-40.0 F) in 1934, marked on the chart; the median year is -30.0 C (-22.0 F).
Coldest night (TNn) at Tweed by year
Year
Coldest night (TNn)
1925
-29.4 C (-20.9 F)
1926
-27.8 C (-18.0 F)
1927
-29.4 C (-20.9 F)
1928
-27.2 C (-17.0 F)
1929
-28.9 C (-20.0 F)
1930
-31.7 C (-25.1 F)
1931
-28.3 C (-18.9 F)
1932
-26.1 C (-15.0 F)
1933
-38.9 C (-38.0 F)
1934
-40.0 C (-40.0 F)
1935
-33.9 C (-29.0 F)
1936
-29.4 C (-20.9 F)
1937
-21.7 C (-7.1 F)
1938
-29.4 C (-20.9 F)
1939
-32.8 C (-27.0 F)
1940
-31.7 C (-25.1 F)
1941
-28.9 C (-20.0 F)
1942
-34.4 C (-29.9 F)
1943
-36.1 C (-33.0 F)
1944
-30.0 C (-22.0 F)
1945
-35.6 C (-32.1 F)
1946
-30.0 C (-22.0 F)
1947
-28.9 C (-20.0 F)
1948
-31.7 C (-25.1 F)
1949
-23.9 C (-11.0 F)
1950
-28.9 C (-20.0 F)
1951
-32.8 C (-27.0 F)
1952
-31.1 C (-24.0 F)
1953
-20.6 C (-5.1 F)
1954
-32.8 C (-27.0 F)
1955
-33.3 C (-27.9 F)
1956
-27.8 C (-18.0 F)
1957
-36.1 C (-33.0 F)
1958
-28.9 C (-20.0 F)
1959
-27.8 C (-18.0 F)
1960
-27.2 C (-17.0 F)
1961
-27.2 C (-17.0 F)
1962
-33.3 C (-27.9 F)
1963
-30.6 C (-23.1 F)
1964
-26.7 C (-16.1 F)
1965
-30.0 C (-22.0 F)
1966
-27.8 C (-18.0 F)
1967
-31.1 C (-24.0 F)
1968
-34.4 C (-29.9 F)
1969
-28.9 C (-20.0 F)
1970
-36.1 C (-33.0 F)
1971
-37.2 C (-35.0 F)
1972
-33.3 C (-27.9 F)
Wettest day (Rx1day)
The wettest day of the year at Tweed, 1925 to 1972. The record is 92.7 mm (3.6 in) in 1953, marked on the chart; the median year is 43.9 mm (1.7 in).
Wettest day (Rx1day) at Tweed by year
Year
Wettest day (Rx1day)
1925
60.5 mm (2.4 in)
1926
44.7 mm (1.8 in)
1927
31.0 mm (1.2 in)
1928
63.0 mm (2.5 in)
1929
42.4 mm (1.7 in)
1930
42.7 mm (1.7 in)
1931
38.6 mm (1.5 in)
1932
43.9 mm (1.7 in)
1933
49.3 mm (1.9 in)
1934
53.6 mm (2.1 in)
1935
60.7 mm (2.4 in)
1936
86.6 mm (3.4 in)
1937
51.8 mm (2.0 in)
1938
71.4 mm (2.8 in)
1939
43.9 mm (1.7 in)
1940
54.4 mm (2.1 in)
1941
34.5 mm (1.4 in)
1942
37.6 mm (1.5 in)
1943
60.5 mm (2.4 in)
1944
29.5 mm (1.2 in)
1945
66.3 mm (2.6 in)
1946
30.5 mm (1.2 in)
1947
73.7 mm (2.9 in)
1948
49.3 mm (1.9 in)
1949
n/a
1950
19.1 mm (0.8 in)
1951
71.1 mm (2.8 in)
1952
39.4 mm (1.6 in)
1953
92.7 mm (3.6 in)
1954
30.5 mm (1.2 in)
1955
74.9 mm (2.9 in)
1956
63.5 mm (2.5 in)
1957
40.6 mm (1.6 in)
1958
36.8 mm (1.4 in)
1959
27.9 mm (1.1 in)
1960
33.0 mm (1.3 in)
1961
44.2 mm (1.7 in)
1962
36.6 mm (1.4 in)
1963
48.5 mm (1.9 in)
1964
34.8 mm (1.4 in)
1965
34.3 mm (1.4 in)
1966
37.6 mm (1.5 in)
1967
49.0 mm (1.9 in)
1968
33.5 mm (1.3 in)
1969
48.3 mm (1.9 in)
1970
34.8 mm (1.4 in)
1971
40.9 mm (1.6 in)
1972
48.5 mm (1.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Tweed, 1925 to 1972. The record is 153.1 mm (6.0 in) in 1955, marked on the chart; the median year is 67.0 mm (2.6 in).
Wettest five days (Rx5day) at Tweed by year
Year
Wettest five days (Rx5day)
1925
64.1 mm (2.5 in)
1926
55.4 mm (2.2 in)
1927
74.0 mm (2.9 in)
1928
80.6 mm (3.2 in)
1929
71.6 mm (2.8 in)
1930
68.4 mm (2.7 in)
1931
67.0 mm (2.6 in)
1932
65.5 mm (2.6 in)
1933
51.6 mm (2.0 in)
1934
78.5 mm (3.1 in)
1935
97.3 mm (3.8 in)
1936
109.0 mm (4.3 in)
1937
64.5 mm (2.5 in)
1938
92.5 mm (3.6 in)
1939
88.6 mm (3.5 in)
1940
113.5 mm (4.5 in)
1941
65.3 mm (2.6 in)
1942
74.4 mm (2.9 in)
1943
68.1 mm (2.7 in)
1944
41.6 mm (1.6 in)
1945
80.3 mm (3.2 in)
1946
62.5 mm (2.5 in)
1947
74.0 mm (2.9 in)
1948
75.7 mm (3.0 in)
1949
n/a
1950
31.1 mm (1.2 in)
1951
77.2 mm (3.0 in)
1952
53.6 mm (2.1 in)
1953
92.7 mm (3.6 in)
1954
47.2 mm (1.9 in)
1955
153.1 mm (6.0 in)
1956
66.3 mm (2.6 in)
1957
55.3 mm (2.2 in)
1958
46.7 mm (1.8 in)
1959
59.5 mm (2.3 in)
1960
46.0 mm (1.8 in)
1961
71.3 mm (2.8 in)
1962
49.3 mm (1.9 in)
1963
59.4 mm (2.3 in)
1964
38.1 mm (1.5 in)
1965
75.5 mm (3.0 in)
1966
81.8 mm (3.2 in)
1967
71.1 mm (2.8 in)
1968
53.9 mm (2.1 in)
1969
84.5 mm (3.3 in)
1970
48.7 mm (1.9 in)
1971
66.0 mm (2.6 in)
1972
53.4 mm (2.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Tweed, 1925 to 1972. The record is 29 days in 1947, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Tweed by year
Year
Longest dry spell (CDD)
1925
22 days
1926
13 days
1927
12 days
1928
12 days
1929
14 days
1930
17 days
1931
15 days
1932
11 days
1933
9 days
1934
17 days
1935
17 days
1936
25 days
1937
13 days
1938
22 days
1939
20 days
1940
12 days
1941
18 days
1942
23 days
1943
12 days
1944
21 days
1945
12 days
1946
10 days
1947
29 days
1948
17 days
1949
n/a
1950
7 days
1951
12 days
1952
19 days
1953
11 days
1954
12 days
1955
16 days
1956
15 days
1957
22 days
1958
18 days
1959
15 days
1960
13 days
1961
13 days
1962
18 days
1963
18 days
1964
15 days
1965
12 days
1966
11 days
1967
20 days
1968
20 days
1969
16 days
1970
27 days
1971
13 days
1972
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
40 years with a frost
Across 40 years with a frost, the median last spring frost at Tweed falls on 11 May and the median first autumn frost on 27 September, which leaves a median of 139 days between them.
Fitted over all years, the growing season changes by -0.6 days per decade at this station.
Frost dates and growing season at Tweed
Measure
Median, all years
Earliest period
Recent period (1938 to 1971)
Recent against earliest
Fitted trend
Last spring frost
11 May
n/a
11 May
n/a
+1.6 days per decade
First autumn frost
27 September
n/a
27 September
n/a
+1.1 days per decade
Growing days
139 days
n/a
138 days
n/a
-0.6 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
38 years, 1926 to 1971
A day with at least 43.9 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 110.6 mm (4.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Tweed: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
43.9 mm (1.7 in)
5 years
57.6 mm (2.3 in)
10 years
68.1 mm (2.7 in)
25 years
83.3 mm (3.3 in)
50 years
96.3 mm (3.8 in)
Longer than the 38 years of record
100 years
110.6 mm (4.4 in)
Longer than the 38 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, 38 years of values from 1926 to 1971.
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: 92.7 mm (3.6 in) in 1953; 86.6 mm (3.4 in) in 1936; 74.9 mm (2.9 in) in 1955.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Tweed, at 1939. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1939 ran 0.2 C (0.3 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Tweed, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1939
-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 Tweed standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tweed 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.