Record envelope, standing records and threshold days for Yarmouth (CA008206490), Nova Scotia, Canada, with 72 years of record.
Key Facts for Yarmouth
Yarmouth (CA008206490) is a weather station in Nova Scotia, Canada at 43.83 latitude and -66.03 longitude, 31 m (102 ft) above sea level.
The station reports from 1870 to 1941, 72 years of record.
1,464 records set at Yarmouth still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Yarmouth set a daily record precipitation of 28.7 mm (1.1 in) on 25 March 1941.
About the Station
Location: Nova Scotia, Canada, 43.83 latitude, -66.03 longitude.
Elevation: 31 m (102 ft).
Period of record: 1870 to 1941, 72 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 Yarmouth. 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 Yarmouth, 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)
-21.7 C (-7.1 F)
n/a
n/a
Feb
12.2 C (54.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Mar
18.9 C (66.0 F)
-18.3 C (-0.9 F)
n/a
n/a
Apr
22.8 C (73.0 F)
-9.4 C (15.1 F)
n/a
n/a
May
23.9 C (75.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
26.7 C (80.1 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
30.0 C (86.0 F)
5.0 C (41.0 F)
n/a
n/a
Aug
28.3 C (82.9 F)
3.9 C (39.0 F)
n/a
n/a
Sep
28.3 C (82.9 F)
-0.6 C (30.9 F)
n/a
n/a
Oct
24.4 C (75.9 F)
-4.4 C (24.1 F)
n/a
n/a
Nov
18.9 C (66.0 F)
-12.2 C (10.0 F)
n/a
n/a
Dec
15.0 C (59.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Yarmouth still stand. 1887 holds the most, with 42.
Standing records at Yarmouth by the year they were set
Year set
Standing records
1871
8
1872
17
1873
19
1879
20
1880
25
1881
30
1882
17
1883
30
1884
28
1885
37
1886
36
1887
42
1888
31
1889
42
1890
25
1891
30
1892
19
1893
18
1894
23
1895
22
1896
22
1897
27
1898
15
1899
13
1900
26
1901
16
1902
23
1903
20
1904
29
1905
16
1906
21
1907
17
1908
15
1909
17
1910
15
1911
33
1912
16
1913
41
1914
30
1915
19
1916
29
1917
27
1918
21
1919
31
1920
22
1921
17
1922
22
1923
24
1924
11
1925
20
1926
13
1927
18
1928
12
1929
16
1930
21
1931
24
1932
18
1933
21
1934
34
1935
19
1936
25
1937
21
1938
18
1939
16
1940
11
1941
3
All-Time Record Progression
4 new records
4 all-time records were set at Yarmouth between 10 July 1911 and 21 September 1938. Each dot is a new record.
When Yarmouth set new all-time records
Date
Kind
Detail
1911-07-10
Record high maximum temperature
Record high maximum temperature 30.0 C (86.0 F)
1914-02-12
Record low maximum temperature
Record low maximum temperature -15.6 C (3.9 F)
1933-12-29
Record low maximum temperature
Record low maximum temperature -16.7 C (1.9 F)
1938-09-21
Record high minimum temperature
Record high minimum temperature 19.4 C (66.9 F)
Wettest Day of Each Month
Oct: 140.7 mm (5.5 in)
The wettest day on record for each calendar month at Yarmouth. The most was 140.7 mm (5.5 in) on 11 October 1900.
Record daily precipitation for each month at Yarmouth
Month
Record daily precipitation (mm)
Date
Jan
71.1 mm (2.8 in)
28 January 1880
Feb
51.1 mm (2.0 in)
6 February 1920
Mar
73.9 mm (2.9 in)
18 March 1902
Apr
52.1 mm (2.1 in)
19 April 1908
May
78.7 mm (3.1 in)
18 May 1919
Jun
80.8 mm (3.2 in)
10 June 1903
Jul
96.5 mm (3.8 in)
23 July 1888
Aug
114.3 mm (4.5 in)
24 August 1927
Sep
92.5 mm (3.6 in)
16 September 1940
Oct
140.7 mm (5.5 in)
11 October 1900
Nov
99.6 mm (3.9 in)
18 November 1918
Dec
76.5 mm (3.0 in)
5 December 1885
Period of Record Coverage
1871 to 1941
Complete yearUnder 90 percent of days
66 years of record at Yarmouth, 1871 to 1941. 5 years have data for under 90 percent of days and are left out of rankings: 1871, 1872, 1873, 1879, 1941.
Cooler than the station meanWarmer than the station mean
One stripe for each of 56 complete years at Yarmouth, 1880 to 1940. Blue stripes are years cooler than the station's own mean of 6.6 C (44.0 F); red stripes are warmer. The coolest year was 1904, at 5.4 C (41.7 F), and the warmest was 1931, at 8.1 C (46.5 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Yarmouth as warming stripes, 1880 to 1940
Year
Annual mean temperature
Difference from the station mean
1880
6.7 C
+0.01 C
1881
6.4 C
-0.21 C
1883
5.4 C
-1.21 C
1884
6.2 C
-0.44 C
1887
6.2 C
-0.43 C
1888
5.7 C
-0.95 C
1889
7.9 C
+1.25 C
1890
6.8 C
+0.11 C
1891
7.4 C
+0.77 C
1892
6.8 C
+0.14 C
1893
6.1 C
-0.55 C
1894
6.5 C
-0.15 C
1895
7.0 C
+0.32 C
1896
6.4 C
-0.26 C
1897
6.5 C
-0.16 C
1898
6.8 C
+0.14 C
1899
6.7 C
+0.02 C
1900
7.2 C
+0.59 C
1901
7.1 C
+0.47 C
1902
7.0 C
+0.32 C
1903
7.0 C
+0.31 C
1904
5.4 C
-1.26 C
1905
5.7 C
-0.96 C
1906
6.6 C
-0.01 C
1907
5.6 C
-1.05 C
1908
6.8 C
+0.10 C
1909
6.8 C
+0.17 C
1910
7.3 C
+0.63 C
1911
6.7 C
+0.04 C
1912
6.3 C
-0.31 C
1913
7.5 C
+0.87 C
1914
5.9 C
-0.74 C
1915
7.0 C
+0.30 C
1916
6.0 C
-0.70 C
1917
5.5 C
-1.16 C
1918
6.1 C
-0.58 C
1919
6.8 C
+0.14 C
1920
6.4 C
-0.24 C
1921
7.1 C
+0.44 C
1924
6.3 C
-0.32 C
1925
6.2 C
-0.46 C
1926
5.7 C
-0.93 C
1927
7.0 C
+0.38 C
1928
6.9 C
+0.29 C
1929
6.6 C
-0.02 C
1930
7.5 C
+0.80 C
1931
8.1 C
+1.41 C
1932
7.3 C
+0.68 C
1933
7.0 C
+0.36 C
1934
6.6 C
-0.01 C
1935
6.8 C
+0.10 C
1936
7.2 C
+0.51 C
1937
8.0 C
+1.30 C
1938
7.2 C
+0.58 C
1939
6.7 C
+0.07 C
1940
6.1 C
-0.51 C
The fitted trend in annual mean temperature here over 1880 to 1940 is 0.09 C (-0.01 to 0.18) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.15 F (-0.02 to 0.33) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Yarmouth
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.09 C (-0.01 to 0.18) per decade
0.15 F (-0.02 to 0.33) per decade
1880 to 1940
56
Not clearly different from zero
Mean daily maximum
0.07 C (-0.03 to 0.18) per decade
0.1 F (-0.1 to 0.3) per decade
1880 to 1940
56
Not clearly different from zero
Mean daily minimum
0.10 C (0.00 to 0.19) per decade
0.17 F (0.00 to 0.35) per decade
1880 to 1940
56
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
1870 to 1941
Yearly extremes at Yarmouth: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
30.0 C (86.0 F)
1911
26.1 C (79.0 F)
66
Coldest night (TNn)
-24.4 C (-11.9 F)
1894
-17.2 C (1.0 F)
67
Wettest day (Rx1day)
140.7 mm (5.5 in)
1900
56.6 mm (2.2 in)
67
Wettest five days (Rx5day)
261.9 mm (10.3 in)
1900
83.6 mm (3.3 in)
67
Longest dry spell (CDD)
26 days
1920
14 days
67
Hottest day (TXx)
The hottest day of the year at Yarmouth, 1870 to 1941. The record is 30.0 C (86.0 F) in 1911, marked on the chart; the median year is 26.1 C (79.0 F).
Hottest day (TXx) at Yarmouth by year
Year
Hottest day (TXx)
1870
n/a
1871
25.0 C (77.0 F)
1872
27.2 C (81.0 F)
1873
24.4 C (75.9 F)
1879
24.4 C (75.9 F)
1880
25.6 C (78.1 F)
1881
28.3 C (82.9 F)
1882
28.3 C (82.9 F)
1883
25.0 C (77.0 F)
1884
24.4 C (75.9 F)
1885
24.4 C (75.9 F)
1886
26.1 C (79.0 F)
1887
28.9 C (84.0 F)
1888
25.0 C (77.0 F)
1889
25.0 C (77.0 F)
1890
25.6 C (78.1 F)
1891
26.1 C (79.0 F)
1892
25.0 C (77.0 F)
1893
26.1 C (79.0 F)
1894
25.0 C (77.0 F)
1895
26.1 C (79.0 F)
1896
23.9 C (75.0 F)
1897
25.0 C (77.0 F)
1898
26.7 C (80.1 F)
1899
25.6 C (78.1 F)
1900
26.7 C (80.1 F)
1901
28.9 C (84.0 F)
1902
27.8 C (82.0 F)
1903
24.4 C (75.9 F)
1904
25.0 C (77.0 F)
1905
24.4 C (75.9 F)
1906
27.2 C (81.0 F)
1907
23.3 C (73.9 F)
1908
26.7 C (80.1 F)
1909
26.7 C (80.1 F)
1910
23.9 C (75.0 F)
1911
30.0 C (86.0 F)
1912
25.6 C (78.1 F)
1913
24.4 C (75.9 F)
1914
23.9 C (75.0 F)
1915
25.0 C (77.0 F)
1916
26.1 C (79.0 F)
1917
26.7 C (80.1 F)
1918
26.1 C (79.0 F)
1919
28.3 C (82.9 F)
1920
25.0 C (77.0 F)
1921
27.8 C (82.0 F)
1922
26.1 C (79.0 F)
1923
24.4 C (75.9 F)
1924
25.6 C (78.1 F)
1925
26.1 C (79.0 F)
1926
27.2 C (81.0 F)
1927
26.1 C (79.0 F)
1928
26.1 C (79.0 F)
1929
26.7 C (80.1 F)
1930
26.7 C (80.1 F)
1931
26.1 C (79.0 F)
1932
28.3 C (82.9 F)
1933
26.7 C (80.1 F)
1934
26.1 C (79.0 F)
1935
27.8 C (82.0 F)
1936
27.8 C (82.0 F)
1937
28.9 C (84.0 F)
1938
27.2 C (81.0 F)
1939
27.8 C (82.0 F)
1940
28.3 C (82.9 F)
1941
8.3 C (46.9 F)
Coldest night (TNn)
The coldest night of the year at Yarmouth, 1870 to 1941. The record is -24.4 C (-11.9 F) in 1894, marked on the chart; the median year is -17.2 C (1.0 F).
Coldest night (TNn) at Yarmouth by year
Year
Coldest night (TNn)
1870
-12.2 C (10.0 F)
1871
-21.7 C (-7.1 F)
1872
-18.3 C (-0.9 F)
1873
-15.6 C (3.9 F)
1879
-20.6 C (-5.1 F)
1880
-16.1 C (3.0 F)
1881
-15.0 C (5.0 F)
1882
-17.2 C (1.0 F)
1883
-18.9 C (-2.0 F)
1884
-18.3 C (-0.9 F)
1885
-18.9 C (-2.0 F)
1886
-19.4 C (-2.9 F)
1887
-17.2 C (1.0 F)
1888
-15.6 C (3.9 F)
1889
-18.3 C (-0.9 F)
1890
-18.3 C (-0.9 F)
1891
-15.6 C (3.9 F)
1892
-16.7 C (1.9 F)
1893
-16.1 C (3.0 F)
1894
-24.4 C (-11.9 F)
1895
-17.2 C (1.0 F)
1896
-18.9 C (-2.0 F)
1897
-18.9 C (-2.0 F)
1898
-21.1 C (-6.0 F)
1899
-16.7 C (1.9 F)
1900
-16.7 C (1.9 F)
1901
-17.2 C (1.0 F)
1902
-18.9 C (-2.0 F)
1903
-18.3 C (-0.9 F)
1904
-18.3 C (-0.9 F)
1905
-17.2 C (1.0 F)
1906
-14.4 C (6.1 F)
1907
-18.3 C (-0.9 F)
1908
-17.8 C (0.0 F)
1909
-15.6 C (3.9 F)
1910
-15.6 C (3.9 F)
1911
-17.8 C (0.0 F)
1912
-16.7 C (1.9 F)
1913
-16.7 C (1.9 F)
1914
-21.1 C (-6.0 F)
1915
-16.7 C (1.9 F)
1916
-23.3 C (-9.9 F)
1917
-17.2 C (1.0 F)
1918
-19.4 C (-2.9 F)
1919
-18.3 C (-0.9 F)
1920
-20.0 C (-4.0 F)
1921
-16.7 C (1.9 F)
1922
-17.8 C (0.0 F)
1923
-17.2 C (1.0 F)
1924
-21.1 C (-6.0 F)
1925
-21.1 C (-6.0 F)
1926
-17.2 C (1.0 F)
1927
-17.2 C (1.0 F)
1928
-15.6 C (3.9 F)
1929
-15.6 C (3.9 F)
1930
-15.0 C (5.0 F)
1931
-15.0 C (5.0 F)
1932
-15.6 C (3.9 F)
1933
-22.2 C (-8.0 F)
1934
-20.0 C (-4.0 F)
1935
-16.7 C (1.9 F)
1936
-15.6 C (3.9 F)
1937
-12.2 C (10.0 F)
1938
-17.2 C (1.0 F)
1939
-14.4 C (6.1 F)
1940
-14.4 C (6.1 F)
1941
-18.3 C (-0.9 F)
Wettest day (Rx1day)
The wettest day of the year at Yarmouth, 1870 to 1941. The record is 140.7 mm (5.5 in) in 1900, marked on the chart; the median year is 56.6 mm (2.2 in).
Wettest day (Rx1day) at Yarmouth by year
Year
Wettest day (Rx1day)
1870
16.3 mm (0.6 in)
1871
36.1 mm (1.4 in)
1872
41.9 mm (1.6 in)
1873
35.6 mm (1.4 in)
1879
26.2 mm (1.0 in)
1880
71.1 mm (2.8 in)
1881
52.8 mm (2.1 in)
1882
63.5 mm (2.5 in)
1883
52.8 mm (2.1 in)
1884
36.1 mm (1.4 in)
1885
107.7 mm (4.2 in)
1886
51.1 mm (2.0 in)
1887
65.8 mm (2.6 in)
1888
96.5 mm (3.8 in)
1889
45.7 mm (1.8 in)
1890
64.5 mm (2.5 in)
1891
81.0 mm (3.2 in)
1892
54.9 mm (2.2 in)
1893
78.7 mm (3.1 in)
1894
57.7 mm (2.3 in)
1895
78.7 mm (3.1 in)
1896
64.8 mm (2.6 in)
1897
87.1 mm (3.4 in)
1898
71.9 mm (2.8 in)
1899
71.1 mm (2.8 in)
1900
140.7 mm (5.5 in)
1901
55.4 mm (2.2 in)
1902
73.9 mm (2.9 in)
1903
81.0 mm (3.2 in)
1904
52.3 mm (2.1 in)
1905
62.0 mm (2.4 in)
1906
54.9 mm (2.2 in)
1907
56.1 mm (2.2 in)
1908
52.1 mm (2.1 in)
1909
37.1 mm (1.5 in)
1910
44.2 mm (1.7 in)
1911
55.9 mm (2.2 in)
1912
61.2 mm (2.4 in)
1913
58.9 mm (2.3 in)
1914
51.3 mm (2.0 in)
1915
33.3 mm (1.3 in)
1916
73.7 mm (2.9 in)
1917
85.9 mm (3.4 in)
1918
99.6 mm (3.9 in)
1919
87.9 mm (3.5 in)
1920
53.6 mm (2.1 in)
1921
36.8 mm (1.4 in)
1922
80.5 mm (3.2 in)
1923
62.5 mm (2.5 in)
1924
65.5 mm (2.6 in)
1925
58.4 mm (2.3 in)
1926
56.6 mm (2.2 in)
1927
114.3 mm (4.5 in)
1928
39.6 mm (1.6 in)
1929
56.1 mm (2.2 in)
1930
49.3 mm (1.9 in)
1931
49.3 mm (1.9 in)
1932
40.9 mm (1.6 in)
1933
81.8 mm (3.2 in)
1934
47.8 mm (1.9 in)
1935
49.8 mm (2.0 in)
1936
87.1 mm (3.4 in)
1937
68.6 mm (2.7 in)
1938
51.8 mm (2.0 in)
1939
40.6 mm (1.6 in)
1940
92.5 mm (3.6 in)
1941
28.7 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Yarmouth, 1870 to 1941. The record is 261.9 mm (10.3 in) in 1900, marked on the chart; the median year is 83.6 mm (3.3 in).
Wettest five days (Rx5day) at Yarmouth by year
Year
Wettest five days (Rx5day)
1870
25.9 mm (1.0 in)
1871
66.5 mm (2.6 in)
1872
70.3 mm (2.8 in)
1873
38.9 mm (1.5 in)
1879
44.8 mm (1.8 in)
1880
82.2 mm (3.2 in)
1881
126.0 mm (5.0 in)
1882
68.1 mm (2.7 in)
1883
65.5 mm (2.6 in)
1884
75.2 mm (3.0 in)
1885
123.9 mm (4.9 in)
1886
89.6 mm (3.5 in)
1887
122.2 mm (4.8 in)
1888
113.7 mm (4.5 in)
1889
73.2 mm (2.9 in)
1890
81.8 mm (3.2 in)
1891
111.3 mm (4.4 in)
1892
91.2 mm (3.6 in)
1893
87.3 mm (3.4 in)
1894
99.4 mm (3.9 in)
1895
80.0 mm (3.1 in)
1896
68.3 mm (2.7 in)
1897
102.6 mm (4.0 in)
1898
105.1 mm (4.1 in)
1899
104.7 mm (4.1 in)
1900
261.9 mm (10.3 in)
1901
83.6 mm (3.3 in)
1902
137.1 mm (5.4 in)
1903
116.1 mm (4.6 in)
1904
64.8 mm (2.6 in)
1905
76.2 mm (3.0 in)
1906
92.2 mm (3.6 in)
1907
82.7 mm (3.3 in)
1908
66.5 mm (2.6 in)
1909
82.1 mm (3.2 in)
1910
110.6 mm (4.4 in)
1911
60.5 mm (2.4 in)
1912
79.5 mm (3.1 in)
1913
107.7 mm (4.2 in)
1914
66.6 mm (2.6 in)
1915
71.1 mm (2.8 in)
1916
83.4 mm (3.3 in)
1917
141.8 mm (5.6 in)
1918
118.1 mm (4.6 in)
1919
116.9 mm (4.6 in)
1920
65.1 mm (2.6 in)
1921
49.1 mm (1.9 in)
1922
125.0 mm (4.9 in)
1923
100.5 mm (4.0 in)
1924
66.5 mm (2.6 in)
1925
90.9 mm (3.6 in)
1926
61.3 mm (2.4 in)
1927
124.9 mm (4.9 in)
1928
69.1 mm (2.7 in)
1929
121.3 mm (4.8 in)
1930
99.5 mm (3.9 in)
1931
96.8 mm (3.8 in)
1932
76.9 mm (3.0 in)
1933
123.2 mm (4.9 in)
1934
60.4 mm (2.4 in)
1935
80.2 mm (3.2 in)
1936
125.7 mm (4.9 in)
1937
87.9 mm (3.5 in)
1938
97.9 mm (3.9 in)
1939
78.7 mm (3.1 in)
1940
129.8 mm (5.1 in)
1941
63.4 mm (2.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Yarmouth, 1870 to 1941. The record is 26 days in 1920, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at Yarmouth by year
Year
Longest dry spell (CDD)
1870
10 days
1871
14 days
1872
18 days
1873
15 days
1879
8 days
1880
16 days
1881
12 days
1882
18 days
1883
11 days
1884
12 days
1885
20 days
1886
21 days
1887
16 days
1888
11 days
1889
22 days
1890
10 days
1891
17 days
1892
13 days
1893
11 days
1894
13 days
1895
12 days
1896
9 days
1897
15 days
1898
10 days
1899
15 days
1900
16 days
1901
11 days
1902
11 days
1903
11 days
1904
14 days
1905
16 days
1906
14 days
1907
14 days
1908
16 days
1909
13 days
1910
12 days
1911
18 days
1912
15 days
1913
16 days
1914
20 days
1915
13 days
1916
11 days
1917
10 days
1918
14 days
1919
11 days
1920
26 days
1921
13 days
1922
14 days
1923
13 days
1924
24 days
1925
24 days
1926
15 days
1927
14 days
1928
12 days
1929
12 days
1930
21 days
1931
17 days
1932
22 days
1933
10 days
1934
17 days
1935
14 days
1936
15 days
1937
16 days
1938
13 days
1939
25 days
1940
16 days
1941
9 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
56 years with a frost
Across 56 years with a frost, the median last spring frost at Yarmouth falls on 5 May and the median first autumn frost on 15 October, which leaves a median of 162 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 Yarmouth
Measure
Median, all years
Earliest period
Recent period (1909 to 1940)
Recent against earliest
Fitted trend
Last spring frost
5 May
n/a
6 May
n/a
+0.3 days per decade
First autumn frost
15 October
n/a
15 October
n/a
+1.3 days per decade
Growing days
162 days
n/a
160 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
61 years, 1880 to 1940
A day with at least 60.9 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 134.6 mm (5.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Yarmouth: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
60.9 mm (2.4 in)
5 years
79.2 mm (3.1 in)
10 years
91.9 mm (3.6 in)
25 years
108.5 mm (4.3 in)
50 years
121.4 mm (4.8 in)
100 years
134.6 mm (5.3 in)
Longer than the 61 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, 61 years of values from 1880 to 1940.
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: 140.7 mm (5.5 in) in 1900; 114.3 mm (4.5 in) in 1927; 107.7 mm (4.2 in) in 1885.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Yarmouth, at 1918. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1918 ran 0.2 C (0.4 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Yarmouth, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1918
+0.2
+0.4
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 Yarmouth standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Yarmouth 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.