Record envelope, standing records and threshold days for St John's (CA008403500), Newfoundland and Labrador, Canada, with 83 years of record.
Key Facts for St John's
St John's (CA008403500) is a weather station in Newfoundland and Labrador, Canada at 47.57 latitude and -52.70 longitude, 38 m (125 ft) above sea level.
The station reports from 1874 to 1956, 83 years of record.
1,464 records set at St John's still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
St John's set a daily record snowfall of 33.0 cm (13.0 in) on 17 March 1956.
About the Station
Location: Newfoundland and Labrador, Canada, 47.57 latitude, -52.70 longitude.
Elevation: 38 m (125 ft).
Period of record: 1874 to 1956, 83 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 St John's. 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 St John's, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.0 C (59.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Feb
13.9 C (57.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Mar
19.4 C (66.9 F)
-25.6 C (-14.1 F)
n/a
n/a
Apr
22.2 C (72.0 F)
-18.3 C (-0.9 F)
n/a
n/a
May
27.2 C (81.0 F)
-6.7 C (19.9 F)
n/a
n/a
Jun
30.6 C (87.1 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
32.2 C (90.0 F)
0.6 C (33.1 F)
n/a
n/a
Aug
33.9 C (93.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
28.9 C (84.0 F)
-1.7 C (28.9 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-5.6 C (21.9 F)
n/a
n/a
Nov
18.9 C (66.0 F)
-14.4 C (6.1 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-20.0 C (-4.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at St John's still stand. 1875 holds the most, with 43.
Standing records at St John's by the year they were set
Year set
Standing records
1874
27
1875
43
1876
28
1877
27
1878
15
1879
18
1880
30
1881
31
1882
31
1883
26
1884
39
1885
13
1886
34
1887
29
1888
22
1889
39
1890
34
1891
22
1892
22
1893
17
1894
31
1895
13
1896
16
1897
17
1898
24
1899
14
1900
24
1901
26
1902
23
1903
20
1904
23
1905
9
1906
18
1907
22
1908
22
1909
28
1910
20
1911
15
1912
20
1913
23
1914
22
1915
25
1916
12
1917
12
1918
21
1919
20
1920
23
1921
16
1922
14
1923
23
1924
4
1925
10
1926
5
1927
6
1928
13
1929
3
1931
2
1932
19
1933
3
1934
3
1935
13
1936
19
1937
33
1938
24
1939
22
1940
7
1941
10
1949
24
1950
9
1951
25
1952
9
1953
27
1954
26
1955
5
All-Time Record Progression
1 new records
1 all-time records were set at St John's between 3 August 1920 and 3 August 1920. Each dot is a new record.
When St John's set new all-time records
Date
Kind
Detail
1920-08-03
Record high minimum temperature
Record high minimum temperature 20.6 C (69.1 F)
Wettest Day of Each Month
Aug: 173.2 mm (6.8 in)
The wettest day on record for each calendar month at St John's. The most was 173.2 mm (6.8 in) on 29 August 1876.
Record daily precipitation for each month at St John's
Month
Record daily precipitation (mm)
Date
Jan
71.9 mm (2.8 in)
7 January 1954
Feb
102.9 mm (4.1 in)
13 February 1892
Mar
61.0 mm (2.4 in)
4 March 1891
Apr
79.8 mm (3.1 in)
11 April 1951
May
85.6 mm (3.4 in)
1 May 1916
Jun
74.7 mm (2.9 in)
30 June 1891
Jul
61.0 mm (2.4 in)
14 July 1881
Aug
173.2 mm (6.8 in)
29 August 1876
Sep
65.3 mm (2.6 in)
9 September 1949
Oct
111.0 mm (4.4 in)
6 October 1953
Nov
71.4 mm (2.8 in)
18 November 1884
Dec
91.7 mm (3.6 in)
26 December 1953
Period of Record Coverage
1874 to 1956
Complete yearUnder 90 percent of days
76 years of record at St John's, 1874 to 1956. 12 years have data for under 90 percent of days and are left out of rankings: 1922, 1924, 1925, 1926, 1927, 1929, 1931, 1933 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 57 complete years at St John's, 1874 to 1954. Blue stripes are years cooler than the station's own mean of 4.9 C (40.9 F); red stripes are warmer. The coolest year was 1875, at 3.2 C (37.7 F), and the warmest was 1951, at 6.9 C (44.5 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at St John's as warming stripes, 1874 to 1954
Year
Annual mean temperature
Difference from the station mean
1874
4.5 C
-0.47 C
1875
3.2 C
-1.74 C
1876
4.8 C
-0.13 C
1877
5.3 C
+0.41 C
1878
5.6 C
+0.70 C
1879
4.6 C
-0.37 C
1880
4.1 C
-0.79 C
1881
4.2 C
-0.75 C
1882
4.1 C
-0.88 C
1883
4.8 C
-0.18 C
1884
3.5 C
-1.47 C
1885
4.8 C
-0.18 C
1886
5.2 C
+0.31 C
1887
4.5 C
-0.47 C
1888
4.1 C
-0.80 C
1889
6.9 C
+1.97 C
1890
4.7 C
-0.24 C
1891
4.9 C
+0.01 C
1892
5.9 C
+0.98 C
1893
4.6 C
-0.35 C
1894
3.9 C
-1.04 C
1896
4.8 C
-0.18 C
1898
5.2 C
+0.22 C
1899
4.2 C
-0.78 C
1900
4.9 C
-0.01 C
1901
5.7 C
+0.77 C
1902
5.4 C
+0.45 C
1903
4.1 C
-0.83 C
1904
4.3 C
-0.67 C
1905
4.1 C
-0.84 C
1906
5.2 C
+0.25 C
1907
4.0 C
-0.94 C
1908
5.2 C
+0.28 C
1909
5.9 C
+0.93 C
1910
6.4 C
+1.43 C
1911
4.4 C
-0.57 C
1912
4.5 C
-0.45 C
1913
4.8 C
-0.16 C
1914
3.8 C
-1.10 C
1915
5.2 C
+0.28 C
1916
5.1 C
+0.12 C
1917
5.6 C
+0.65 C
1918
4.2 C
-0.73 C
1919
4.6 C
-0.34 C
1920
4.8 C
-0.12 C
1932
5.4 C
+0.45 C
1935
4.9 C
+0.01 C
1936
6.0 C
+1.10 C
1937
6.2 C
+1.25 C
1938
5.7 C
+0.75 C
1939
4.3 C
-0.62 C
1940
5.3 C
+0.39 C
1941
4.5 C
-0.42 C
1950
5.2 C
+0.29 C
1951
6.9 C
+2.00 C
1952
6.7 C
+1.79 C
1954
6.0 C
+1.08 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1874 to 1954. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 57 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at St John's
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1874 to 1954
57
Rise
Mean daily maximum
0.07 C (-0.03 to 0.16) per decade
0.1 F (-0.1 to 0.3) per decade
1874 to 1954
57
Not clearly different from zero
Mean daily minimum
0.3 C (0.2 to 0.4) per decade
0.5 F (0.3 to 0.6) per decade
1874 to 1954
57
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
1874 to 1956
Yearly extremes at St John's: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
33.9 C (93.0 F)
1876
28.3 C (82.9 F)
76
Coldest night (TNn)
-29.4 C (-20.9 F)
1875
-20.0 C (-4.0 F)
76
Wettest day (Rx1day)
173.2 mm (6.8 in)
1876
52.0 mm (2.0 in)
76
Wettest five days (Rx5day)
215.2 mm (8.5 in)
1909
91.1 mm (3.6 in)
76
Longest dry spell (CDD)
21 days
1883
12 days
76
Hottest day (TXx)
The hottest day of the year at St John's, 1874 to 1956. The record is 33.9 C (93.0 F) in 1876, marked on the chart; the median year is 28.3 C (82.9 F).
Hottest day (TXx) at St John's by year
Year
Hottest day (TXx)
1874
28.3 C (82.9 F)
1875
28.9 C (84.0 F)
1876
33.9 C (93.0 F)
1877
30.6 C (87.1 F)
1878
26.7 C (80.1 F)
1879
27.8 C (82.0 F)
1880
30.6 C (87.1 F)
1881
27.2 C (81.0 F)
1882
29.4 C (84.9 F)
1883
30.0 C (86.0 F)
1884
27.8 C (82.0 F)
1885
28.3 C (82.9 F)
1886
26.7 C (80.1 F)
1887
30.0 C (86.0 F)
1888
24.4 C (75.9 F)
1889
28.3 C (82.9 F)
1890
28.9 C (84.0 F)
1891
28.9 C (84.0 F)
1892
29.4 C (84.9 F)
1893
28.3 C (82.9 F)
1894
28.9 C (84.0 F)
1895
30.6 C (87.1 F)
1896
28.9 C (84.0 F)
1897
27.8 C (82.0 F)
1898
27.8 C (82.0 F)
1899
27.2 C (81.0 F)
1900
28.9 C (84.0 F)
1901
28.3 C (82.9 F)
1902
26.7 C (80.1 F)
1903
23.9 C (75.0 F)
1904
28.3 C (82.9 F)
1905
25.6 C (78.1 F)
1906
27.2 C (81.0 F)
1907
26.7 C (80.1 F)
1908
31.1 C (88.0 F)
1909
31.7 C (89.1 F)
1910
27.8 C (82.0 F)
1911
28.3 C (82.9 F)
1912
30.0 C (86.0 F)
1913
27.2 C (81.0 F)
1914
27.8 C (82.0 F)
1915
30.6 C (87.1 F)
1916
28.9 C (84.0 F)
1917
29.4 C (84.9 F)
1918
26.7 C (80.1 F)
1919
26.7 C (80.1 F)
1920
32.2 C (90.0 F)
1921
30.0 C (86.0 F)
1922
25.6 C (78.1 F)
1923
28.3 C (82.9 F)
1924
28.3 C (82.9 F)
1925
26.1 C (79.0 F)
1926
27.2 C (81.0 F)
1927
23.3 C (73.9 F)
1928
27.8 C (82.0 F)
1929
26.1 C (79.0 F)
1931
20.6 C (69.1 F)
1932
30.6 C (87.1 F)
1933
26.7 C (80.1 F)
1934
18.3 C (64.9 F)
1935
31.7 C (89.1 F)
1936
27.2 C (81.0 F)
1937
31.7 C (89.1 F)
1938
28.9 C (84.0 F)
1939
27.2 C (81.0 F)
1940
28.3 C (82.9 F)
1941
27.8 C (82.0 F)
1948
26.7 C (80.1 F)
1949
30.0 C (86.0 F)
1950
27.8 C (82.0 F)
1951
28.9 C (84.0 F)
1952
31.1 C (88.0 F)
1953
30.6 C (87.1 F)
1954
29.4 C (84.9 F)
1955
17.2 C (63.0 F)
1956
7.8 C (46.0 F)
Coldest night (TNn)
The coldest night of the year at St John's, 1874 to 1956. The record is -29.4 C (-20.9 F) in 1875, marked on the chart; the median year is -20.0 C (-4.0 F).
Coldest night (TNn) at St John's by year
Year
Coldest night (TNn)
1874
-25.6 C (-14.1 F)
1875
-29.4 C (-20.9 F)
1876
-24.4 C (-11.9 F)
1877
-21.1 C (-6.0 F)
1878
-18.9 C (-2.0 F)
1879
-20.0 C (-4.0 F)
1880
-23.3 C (-9.9 F)
1881
-19.4 C (-2.9 F)
1882
-24.4 C (-11.9 F)
1883
-28.9 C (-20.0 F)
1884
-25.0 C (-13.0 F)
1885
-20.6 C (-5.1 F)
1886
-17.8 C (0.0 F)
1887
-21.7 C (-7.1 F)
1888
-19.4 C (-2.9 F)
1889
-24.4 C (-11.9 F)
1890
-28.3 C (-18.9 F)
1891
-25.0 C (-13.0 F)
1892
-16.7 C (1.9 F)
1893
-21.1 C (-6.0 F)
1894
-23.3 C (-9.9 F)
1895
-17.8 C (0.0 F)
1896
-18.3 C (-0.9 F)
1897
-23.3 C (-9.9 F)
1898
-26.1 C (-15.0 F)
1899
-23.9 C (-11.0 F)
1900
-18.9 C (-2.0 F)
1901
-21.1 C (-6.0 F)
1902
-17.8 C (0.0 F)
1903
-17.8 C (0.0 F)
1904
-28.3 C (-18.9 F)
1905
-21.7 C (-7.1 F)
1906
-17.8 C (0.0 F)
1907
-20.6 C (-5.1 F)
1908
-18.3 C (-0.9 F)
1909
-20.6 C (-5.1 F)
1910
-18.9 C (-2.0 F)
1911
-23.3 C (-9.9 F)
1912
-21.7 C (-7.1 F)
1913
-22.2 C (-8.0 F)
1914
-20.6 C (-5.1 F)
1915
-23.3 C (-9.9 F)
1916
-23.3 C (-9.9 F)
1917
-20.0 C (-4.0 F)
1918
-18.9 C (-2.0 F)
1919
-17.8 C (0.0 F)
1920
-23.9 C (-11.0 F)
1921
-19.4 C (-2.9 F)
1922
-21.7 C (-7.1 F)
1923
-23.3 C (-9.9 F)
1924
-15.0 C (5.0 F)
1925
-21.7 C (-7.1 F)
1926
-17.8 C (0.0 F)
1927
-12.2 C (10.0 F)
1928
-20.0 C (-4.0 F)
1929
-17.8 C (0.0 F)
1931
-15.0 C (5.0 F)
1932
-22.2 C (-8.0 F)
1933
-16.1 C (3.0 F)
1934
-10.6 C (12.9 F)
1935
-22.2 C (-8.0 F)
1936
-16.1 C (3.0 F)
1937
-17.8 C (0.0 F)
1938
-17.8 C (0.0 F)
1939
-18.3 C (-0.9 F)
1940
-16.7 C (1.9 F)
1941
-16.1 C (3.0 F)
1948
-13.3 C (8.1 F)
1949
-18.3 C (-0.9 F)
1950
-21.1 C (-6.0 F)
1951
-18.9 C (-2.0 F)
1952
-14.4 C (6.1 F)
1953
-12.8 C (9.0 F)
1954
-15.0 C (5.0 F)
1955
-16.1 C (3.0 F)
1956
-18.3 C (-0.9 F)
Wettest day (Rx1day)
The wettest day of the year at St John's, 1874 to 1956. The record is 173.2 mm (6.8 in) in 1876, marked on the chart; the median year is 52.0 mm (2.0 in).
Wettest day (Rx1day) at St John's by year
Year
Wettest day (Rx1day)
1874
55.9 mm (2.2 in)
1875
32.0 mm (1.3 in)
1876
173.2 mm (6.8 in)
1877
48.3 mm (1.9 in)
1878
58.4 mm (2.3 in)
1879
41.1 mm (1.6 in)
1880
45.7 mm (1.8 in)
1881
61.0 mm (2.4 in)
1882
61.0 mm (2.4 in)
1883
43.2 mm (1.7 in)
1884
71.4 mm (2.8 in)
1885
49.5 mm (1.9 in)
1886
29.7 mm (1.2 in)
1887
46.5 mm (1.8 in)
1888
70.6 mm (2.8 in)
1889
38.1 mm (1.5 in)
1890
45.2 mm (1.8 in)
1891
74.7 mm (2.9 in)
1892
102.9 mm (4.1 in)
1893
63.5 mm (2.5 in)
1894
101.6 mm (4.0 in)
1895
51.6 mm (2.0 in)
1896
62.0 mm (2.4 in)
1897
61.0 mm (2.4 in)
1898
83.8 mm (3.3 in)
1899
41.9 mm (1.6 in)
1900
36.8 mm (1.4 in)
1901
38.1 mm (1.5 in)
1902
51.6 mm (2.0 in)
1903
54.9 mm (2.2 in)
1904
59.7 mm (2.4 in)
1905
49.8 mm (2.0 in)
1906
68.6 mm (2.7 in)
1907
52.8 mm (2.1 in)
1908
38.1 mm (1.5 in)
1909
80.3 mm (3.2 in)
1910
45.2 mm (1.8 in)
1911
53.8 mm (2.1 in)
1912
55.1 mm (2.2 in)
1913
33.3 mm (1.3 in)
1914
52.1 mm (2.1 in)
1915
37.8 mm (1.5 in)
1916
85.6 mm (3.4 in)
1917
45.7 mm (1.8 in)
1918
71.1 mm (2.8 in)
1919
46.0 mm (1.8 in)
1920
38.1 mm (1.5 in)
1921
61.5 mm (2.4 in)
1922
33.5 mm (1.3 in)
1923
51.8 mm (2.0 in)
1924
34.0 mm (1.3 in)
1925
48.3 mm (1.9 in)
1926
48.3 mm (1.9 in)
1927
38.1 mm (1.5 in)
1928
55.6 mm (2.2 in)
1929
26.9 mm (1.1 in)
1931
30.5 mm (1.2 in)
1932
35.6 mm (1.4 in)
1933
31.0 mm (1.2 in)
1934
48.3 mm (1.9 in)
1935
73.4 mm (2.9 in)
1936
59.9 mm (2.4 in)
1937
58.4 mm (2.3 in)
1938
45.7 mm (1.8 in)
1939
69.9 mm (2.8 in)
1940
46.2 mm (1.8 in)
1941
42.2 mm (1.7 in)
1948
44.5 mm (1.8 in)
1949
65.3 mm (2.6 in)
1950
52.6 mm (2.1 in)
1951
79.8 mm (3.1 in)
1952
72.9 mm (2.9 in)
1953
111.0 mm (4.4 in)
1954
71.9 mm (2.8 in)
1955
63.2 mm (2.5 in)
1956
96.5 mm (3.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at St John's, 1874 to 1956. The record is 215.2 mm (8.5 in) in 1909, marked on the chart; the median year is 91.1 mm (3.6 in).
Wettest five days (Rx5day) at St John's by year
Year
Wettest five days (Rx5day)
1874
112.1 mm (4.4 in)
1875
79.6 mm (3.1 in)
1876
208.5 mm (8.2 in)
1877
85.9 mm (3.4 in)
1878
112.0 mm (4.4 in)
1879
67.3 mm (2.6 in)
1880
76.1 mm (3.0 in)
1881
68.6 mm (2.7 in)
1882
97.4 mm (3.8 in)
1883
102.6 mm (4.0 in)
1884
105.9 mm (4.2 in)
1885
70.8 mm (2.8 in)
1886
64.8 mm (2.6 in)
1887
99.5 mm (3.9 in)
1888
109.1 mm (4.3 in)
1889
74.4 mm (2.9 in)
1890
69.3 mm (2.7 in)
1891
139.5 mm (5.5 in)
1892
128.6 mm (5.1 in)
1893
104.4 mm (4.1 in)
1894
195.6 mm (7.7 in)
1895
103.3 mm (4.1 in)
1896
96.5 mm (3.8 in)
1897
111.8 mm (4.4 in)
1898
142.2 mm (5.6 in)
1899
117.3 mm (4.6 in)
1900
99.0 mm (3.9 in)
1901
89.7 mm (3.5 in)
1902
74.4 mm (2.9 in)
1903
78.0 mm (3.1 in)
1904
84.6 mm (3.3 in)
1905
85.8 mm (3.4 in)
1906
181.1 mm (7.1 in)
1907
117.0 mm (4.6 in)
1908
65.8 mm (2.6 in)
1909
215.2 mm (8.5 in)
1910
90.3 mm (3.6 in)
1911
96.6 mm (3.8 in)
1912
129.4 mm (5.1 in)
1913
69.6 mm (2.7 in)
1914
99.3 mm (3.9 in)
1915
87.3 mm (3.4 in)
1916
102.6 mm (4.0 in)
1917
111.5 mm (4.4 in)
1918
99.5 mm (3.9 in)
1919
74.7 mm (2.9 in)
1920
66.8 mm (2.6 in)
1921
91.9 mm (3.6 in)
1922
69.2 mm (2.7 in)
1923
75.4 mm (3.0 in)
1924
46.7 mm (1.8 in)
1925
67.1 mm (2.6 in)
1926
64.3 mm (2.5 in)
1927
48.5 mm (1.9 in)
1928
73.9 mm (2.9 in)
1929
48.5 mm (1.9 in)
1931
58.3 mm (2.3 in)
1932
84.4 mm (3.3 in)
1933
43.5 mm (1.7 in)
1934
86.8 mm (3.4 in)
1935
130.1 mm (5.1 in)
1936
77.8 mm (3.1 in)
1937
139.8 mm (5.5 in)
1938
67.8 mm (2.7 in)
1939
124.7 mm (4.9 in)
1940
82.6 mm (3.3 in)
1941
77.5 mm (3.1 in)
1948
68.9 mm (2.7 in)
1949
92.0 mm (3.6 in)
1950
68.4 mm (2.7 in)
1951
172.3 mm (6.8 in)
1952
106.7 mm (4.2 in)
1953
146.6 mm (5.8 in)
1954
105.2 mm (4.1 in)
1955
111.2 mm (4.4 in)
1956
121.9 mm (4.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at St John's, 1874 to 1956. The record is 21 days in 1883, marked on the chart; the median year is 12 days.
Longest dry spell (CDD) at St John's by year
Year
Longest dry spell (CDD)
1874
9 days
1875
12 days
1876
20 days
1877
8 days
1878
14 days
1879
13 days
1880
10 days
1881
13 days
1882
12 days
1883
21 days
1884
7 days
1885
9 days
1886
16 days
1887
10 days
1888
9 days
1889
16 days
1890
8 days
1891
12 days
1892
14 days
1893
12 days
1894
10 days
1895
13 days
1896
10 days
1897
9 days
1898
14 days
1899
14 days
1900
8 days
1901
12 days
1902
13 days
1903
11 days
1904
15 days
1905
11 days
1906
13 days
1907
11 days
1908
12 days
1909
12 days
1910
12 days
1911
12 days
1912
10 days
1913
9 days
1914
18 days
1915
12 days
1916
8 days
1917
10 days
1918
13 days
1919
9 days
1920
21 days
1921
10 days
1922
9 days
1923
10 days
1924
5 days
1925
12 days
1926
8 days
1927
8 days
1928
11 days
1929
8 days
1931
11 days
1932
11 days
1933
15 days
1934
6 days
1935
16 days
1936
13 days
1937
13 days
1938
15 days
1939
9 days
1940
12 days
1941
16 days
1948
7 days
1949
9 days
1950
15 days
1951
13 days
1952
14 days
1953
11 days
1954
15 days
1955
4 days
1956
4 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
57 years with a frost
Across 57 years with a frost, the median last spring frost at St John's falls on 1 June and the median first autumn frost on 7 October, which leaves a median of 130 days between them.
Fitted over all years, the growing season changes by +1.1 days per decade at this station.
Frost dates and growing season at St John's
Measure
Median, all years
Earliest period
Recent period (1903 to 1954)
Recent against earliest
Fitted trend
Last spring frost
1 June
n/a
2 June
n/a
-0.4 days per decade
First autumn frost
7 October
n/a
10 October
n/a
+0.7 days per decade
Growing days
130 days
n/a
129 days
n/a
+1.1 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
62 years, 1874 to 1954
A day with at least 53.5 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 141.4 mm (5.6 in) of rain is expected about once in 100 years.
Rainfall return levels at St John's: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
53.5 mm (2.1 in)
5 years
71.5 mm (2.8 in)
10 years
85.4 mm (3.4 in)
25 years
105.5 mm (4.2 in)
50 years
122.5 mm (4.8 in)
100 years
141.4 mm (5.6 in)
Longer than the 62 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, 62 years of values from 1874 to 1954.
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: 173.2 mm (6.8 in) in 1876; 111.0 mm (4.4 in) in 1953; 102.9 mm (4.1 in) in 1892.
Download the Data
Data for St John's standing records by year: CSV or JSON. Field meanings are on the data page.
Data for St John's 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.