Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Port Hope. 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 Port Hope, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.9 C (57.0 F)
-32.2 C (-26.0 F)
n/a
n/a
Feb
11.7 C (53.1 F)
-30.0 C (-22.0 F)
n/a
n/a
Mar
18.9 C (66.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Apr
25.6 C (78.1 F)
-13.9 C (7.0 F)
n/a
n/a
May
30.0 C (86.0 F)
-5.0 C (23.0 F)
n/a
n/a
Jun
34.4 C (93.9 F)
2.2 C (36.0 F)
n/a
n/a
Jul
37.2 C (99.0 F)
3.3 C (37.9 F)
n/a
n/a
Aug
37.8 C (100.0 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-2.8 C (27.0 F)
n/a
n/a
Oct
26.7 C (80.1 F)
-16.7 C (1.9 F)
n/a
n/a
Nov
20.6 C (69.1 F)
-17.8 C (0.0 F)
n/a
n/a
Dec
17.2 C (63.0 F)
-29.0 C (-20.2 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Port Hope still stand. 1898 holds the most, with 115.
Standing records at Port Hope by the year they were set
Year set
Standing records
1897
42
1898
115
1899
76
1900
84
1901
34
1902
42
1903
44
1904
57
1905
35
1906
57
1907
35
1908
38
1909
46
1910
4
1922
104
1963
25
1964
35
1965
52
1966
40
1967
43
1968
25
1969
16
1970
38
1971
32
1972
26
1973
30
1974
23
1975
39
1976
37
1977
21
1978
16
1979
35
1980
24
1981
28
1982
29
1983
37
All-Time Record Progression
1 new records
1 all-time records were set at Port Hope between 3 January 1981 and 3 January 1981. Each dot is a new record.
When Port Hope set new all-time records
Date
Kind
Detail
1981-01-03
Record low maximum temperature
Record low maximum temperature -21.0 C (-5.8 F)
Wettest Day of Each Month
Apr: 101.6 mm (4.0 in)
The wettest day on record for each calendar month at Port Hope. The most was 101.6 mm (4.0 in) on 25 April 1897.
Record daily precipitation for each month at Port Hope
Month
Record daily precipitation (mm)
Date
Jan
61.0 mm (2.4 in)
8 January 1884
Feb
45.7 mm (1.8 in)
8 February 1887
Mar
52.4 mm (2.1 in)
21 March 1980
Apr
101.6 mm (4.0 in)
25 April 1897
May
50.5 mm (2.0 in)
18 May 1969
Jun
58.9 mm (2.3 in)
21 June 1972
Jul
79.2 mm (3.1 in)
5 July 1902
Aug
64.3 mm (2.5 in)
25 August 1892
Sep
66.0 mm (2.6 in)
16 September 1888
Oct
63.2 mm (2.5 in)
19 October 1906
Nov
53.8 mm (2.1 in)
22 November 1909
Dec
66.0 mm (2.6 in)
15 December 1897
Period of Record Coverage
1897 to 1983
Complete yearUnder 90 percent of days
36 years of record at Port Hope, 1897 to 1983. 4 years have data for under 90 percent of days and are left out of rankings: 1897, 1910, 1922, 1963.
Cooler than the station meanWarmer than the station mean
One stripe for each of 28 complete years at Port Hope, 1898 to 1983. Blue stripes are years cooler than the station's own mean of 7.0 C (44.6 F); red stripes are warmer. The coolest year was 1904, at 4.3 C (39.8 F), and the warmest was 1898, at 8.7 C (47.7 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Port Hope as warming stripes, 1898 to 1983
Year
Annual mean temperature
Difference from the station mean
1898
8.7 C
+1.74 C
1899
7.4 C
+0.41 C
1900
7.9 C
+0.93 C
1901
6.9 C
-0.10 C
1902
7.1 C
+0.06 C
1903
6.7 C
-0.25 C
1904
4.3 C
-2.67 C
1906
7.0 C
+0.02 C
1907
5.6 C
-1.37 C
1908
6.5 C
-0.50 C
1965
6.6 C
-0.38 C
1966
7.1 C
+0.06 C
1967
7.1 C
+0.07 C
1968
6.8 C
-0.17 C
1969
7.2 C
+0.21 C
1970
7.1 C
+0.11 C
1971
7.4 C
+0.39 C
1972
6.4 C
-0.60 C
1973
8.0 C
+1.00 C
1974
6.9 C
-0.12 C
1975
7.9 C
+0.88 C
1976
6.4 C
-0.57 C
1978
6.6 C
-0.36 C
1979
7.1 C
+0.10 C
1980
6.7 C
-0.25 C
1981
7.4 C
+0.42 C
1982
6.9 C
-0.13 C
1983
8.1 C
+1.07 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1882 to 1983
Yearly extremes at Port Hope: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.8 C (100.0 F)
1898
31.1 C (88.0 F)
36
Coldest night (TNn)
-32.2 C (-26.0 F)
1904
-25.6 C (-14.1 F)
36
Wettest day (Rx1day)
101.6 mm (4.0 in)
1897
45.7 mm (1.8 in)
48
Wettest five days (Rx5day)
125.4 mm (4.9 in)
1902
64.8 mm (2.5 in)
48
Longest dry spell (CDD)
38 days
1978
19 days
48
Hottest day (TXx)
The hottest day of the year at Port Hope, 1882 to 1983. The record is 37.8 C (100.0 F) in 1898, marked on the chart; the median year is 31.1 C (88.0 F).
Hottest day (TXx) at Port Hope by year
Year
Hottest day (TXx)
1882
n/a
1883
n/a
1884
n/a
1885
n/a
1886
n/a
1887
n/a
1888
n/a
1889
n/a
1890
n/a
1891
n/a
1892
n/a
1893
n/a
1896
n/a
1897
34.4 C (93.9 F)
1898
37.8 C (100.0 F)
1899
37.8 C (100.0 F)
1900
35.0 C (95.0 F)
1901
34.4 C (93.9 F)
1902
31.7 C (89.1 F)
1903
32.2 C (90.0 F)
1904
31.1 C (88.0 F)
1905
31.7 C (89.1 F)
1906
31.7 C (89.1 F)
1907
30.6 C (87.1 F)
1908
32.8 C (91.0 F)
1909
31.7 C (89.1 F)
1910
14.4 C (57.9 F)
1922
31.1 C (88.0 F)
1963
29.4 C (84.9 F)
1964
31.1 C (88.0 F)
1965
29.4 C (84.9 F)
1966
32.8 C (91.0 F)
1967
28.3 C (82.9 F)
1968
31.1 C (88.0 F)
1969
30.0 C (86.0 F)
1970
30.6 C (87.1 F)
1971
33.3 C (91.9 F)
1972
31.1 C (88.0 F)
1973
33.9 C (93.0 F)
1974
28.3 C (82.9 F)
1975
31.1 C (88.0 F)
1976
29.4 C (84.9 F)
1977
31.1 C (88.0 F)
1978
30.5 C (86.9 F)
1979
30.0 C (86.0 F)
1980
29.5 C (85.1 F)
1981
30.5 C (86.9 F)
1982
29.5 C (85.1 F)
1983
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at Port Hope, 1882 to 1983. The record is -32.2 C (-26.0 F) in 1904, marked on the chart; the median year is -25.6 C (-14.1 F).
Coldest night (TNn) at Port Hope by year
Year
Coldest night (TNn)
1882
n/a
1883
n/a
1884
n/a
1885
n/a
1886
n/a
1887
n/a
1888
n/a
1889
n/a
1890
n/a
1891
n/a
1892
n/a
1893
n/a
1896
n/a
1897
-23.3 C (-9.9 F)
1898
-28.9 C (-20.0 F)
1899
-26.7 C (-16.1 F)
1900
-27.2 C (-17.0 F)
1901
-25.6 C (-14.1 F)
1902
-23.3 C (-9.9 F)
1903
-27.2 C (-17.0 F)
1904
-32.2 C (-26.0 F)
1905
-29.4 C (-20.9 F)
1906
-27.8 C (-18.0 F)
1907
-25.0 C (-13.0 F)
1908
-30.6 C (-23.1 F)
1909
-25.6 C (-14.1 F)
1910
-26.1 C (-15.0 F)
1922
-17.8 C (0.0 F)
1963
-21.7 C (-7.1 F)
1964
-20.6 C (-5.1 F)
1965
-24.4 C (-11.9 F)
1966
-22.2 C (-8.0 F)
1967
-25.6 C (-14.1 F)
1968
-25.6 C (-14.1 F)
1969
-20.6 C (-5.1 F)
1970
-24.4 C (-11.9 F)
1971
-23.3 C (-9.9 F)
1972
-23.9 C (-11.0 F)
1973
-22.8 C (-9.0 F)
1974
-20.6 C (-5.1 F)
1975
-22.8 C (-9.0 F)
1976
-30.0 C (-22.0 F)
1977
-26.1 C (-15.0 F)
1978
-20.6 C (-5.1 F)
1979
-26.0 C (-14.8 F)
1980
-29.0 C (-20.2 F)
1981
-32.0 C (-25.6 F)
1982
-29.0 C (-20.2 F)
1983
-22.0 C (-7.6 F)
Wettest day (Rx1day)
The wettest day of the year at Port Hope, 1882 to 1983. The record is 101.6 mm (4.0 in) in 1897, marked on the chart; the median year is 45.7 mm (1.8 in).
Wettest day (Rx1day) at Port Hope by year
Year
Wettest day (Rx1day)
1882
25.4 mm (1.0 in)
1883
43.7 mm (1.7 in)
1884
61.0 mm (2.4 in)
1885
52.1 mm (2.1 in)
1886
38.1 mm (1.5 in)
1887
45.7 mm (1.8 in)
1888
66.0 mm (2.6 in)
1889
43.2 mm (1.7 in)
1890
63.5 mm (2.5 in)
1891
40.6 mm (1.6 in)
1892
64.3 mm (2.5 in)
1893
45.7 mm (1.8 in)
1896
44.5 mm (1.8 in)
1897
101.6 mm (4.0 in)
1898
35.6 mm (1.4 in)
1899
55.1 mm (2.2 in)
1900
29.2 mm (1.1 in)
1901
64.3 mm (2.5 in)
1902
79.2 mm (3.1 in)
1903
63.8 mm (2.5 in)
1904
54.4 mm (2.1 in)
1905
49.8 mm (2.0 in)
1906
63.2 mm (2.5 in)
1907
48.8 mm (1.9 in)
1908
60.5 mm (2.4 in)
1909
53.8 mm (2.1 in)
1910
n/a
1922
31.5 mm (1.2 in)
1963
27.9 mm (1.1 in)
1964
46.0 mm (1.8 in)
1965
36.1 mm (1.4 in)
1966
45.7 mm (1.8 in)
1967
59.2 mm (2.3 in)
1968
39.1 mm (1.5 in)
1969
50.5 mm (2.0 in)
1970
37.3 mm (1.5 in)
1971
43.9 mm (1.7 in)
1972
58.9 mm (2.3 in)
1973
35.6 mm (1.4 in)
1974
36.8 mm (1.4 in)
1975
36.3 mm (1.4 in)
1976
29.0 mm (1.1 in)
1977
29.7 mm (1.2 in)
1978
45.6 mm (1.8 in)
1979
33.4 mm (1.3 in)
1980
59.5 mm (2.3 in)
1981
39.7 mm (1.6 in)
1982
33.0 mm (1.3 in)
1983
35.8 mm (1.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Port Hope, 1882 to 1983. The record is 125.4 mm (4.9 in) in 1902, marked on the chart; the median year is 64.8 mm (2.5 in).
Wettest five days (Rx5day) at Port Hope by year
Year
Wettest five days (Rx5day)
1882
38.1 mm (1.5 in)
1883
55.6 mm (2.2 in)
1884
66.1 mm (2.6 in)
1885
56.7 mm (2.2 in)
1886
55.2 mm (2.2 in)
1887
85.6 mm (3.4 in)
1888
80.7 mm (3.2 in)
1889
78.7 mm (3.1 in)
1890
67.8 mm (2.7 in)
1891
51.6 mm (2.0 in)
1892
69.9 mm (2.8 in)
1893
53.3 mm (2.1 in)
1896
67.4 mm (2.7 in)
1897
117.4 mm (4.6 in)
1898
68.1 mm (2.7 in)
1899
57.1 mm (2.2 in)
1900
52.1 mm (2.1 in)
1901
99.1 mm (3.9 in)
1902
125.4 mm (4.9 in)
1903
65.1 mm (2.6 in)
1904
63.8 mm (2.5 in)
1905
78.4 mm (3.1 in)
1906
63.7 mm (2.5 in)
1907
62.2 mm (2.4 in)
1908
69.4 mm (2.7 in)
1909
81.8 mm (3.2 in)
1910
n/a
1922
52.1 mm (2.1 in)
1963
47.1 mm (1.9 in)
1964
65.6 mm (2.6 in)
1965
70.8 mm (2.8 in)
1966
84.2 mm (3.3 in)
1967
80.3 mm (3.2 in)
1968
45.8 mm (1.8 in)
1969
57.1 mm (2.2 in)
1970
60.7 mm (2.4 in)
1971
61.7 mm (2.4 in)
1972
88.9 mm (3.5 in)
1973
69.9 mm (2.8 in)
1974
65.0 mm (2.6 in)
1975
64.5 mm (2.5 in)
1976
57.2 mm (2.3 in)
1977
51.0 mm (2.0 in)
1978
55.7 mm (2.2 in)
1979
52.7 mm (2.1 in)
1980
78.6 mm (3.1 in)
1981
75.0 mm (3.0 in)
1982
61.8 mm (2.4 in)
1983
56.3 mm (2.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Port Hope, 1882 to 1983. The record is 38 days in 1978, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Port Hope by year
Year
Longest dry spell (CDD)
1882
21 days
1883
14 days
1884
17 days
1885
12 days
1886
19 days
1887
24 days
1888
15 days
1889
22 days
1890
16 days
1891
21 days
1892
12 days
1893
15 days
1896
15 days
1897
20 days
1898
18 days
1899
21 days
1900
14 days
1901
18 days
1902
15 days
1903
22 days
1904
28 days
1905
19 days
1906
17 days
1907
16 days
1908
16 days
1909
20 days
1910
n/a
1922
24 days
1963
31 days
1964
23 days
1965
9 days
1966
20 days
1967
21 days
1968
20 days
1969
24 days
1970
16 days
1971
12 days
1972
14 days
1973
14 days
1974
13 days
1975
19 days
1976
17 days
1977
19 days
1978
38 days
1979
23 days
1980
21 days
1981
12 days
1982
17 days
1983
20 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
28 years with a frost
Across 28 years with a frost, the median last spring frost at Port Hope falls on 1 May and the median first autumn frost on 12 October, which leaves a median of 161 days between them.
Fitted over all years, the growing season changes by +3.8 days per decade at this station.
Frost dates and growing season at Port Hope
Measure
Median, all years
Earliest period
Recent period (1898 to 1983)
Recent against earliest
Fitted trend
Last spring frost
1 May
n/a
1 May
n/a
-1.8 days per decade
First autumn frost
12 October
n/a
12 October
n/a
+1.9 days per decade
Growing days
161 days
n/a
161 days
n/a
+3.8 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
41 years, 1883 to 1983
A day with at least 45.9 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 98.2 mm (3.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Port Hope: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
45.9 mm (1.8 in)
5 years
59.1 mm (2.3 in)
10 years
68.2 mm (2.7 in)
25 years
80.0 mm (3.1 in)
50 years
89.0 mm (3.5 in)
Longer than the 41 years of record
100 years
98.2 mm (3.9 in)
Longer than the 41 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, 41 years of values from 1883 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: 101.6 mm (4.0 in) in 1897; 79.2 mm (3.1 in) in 1902; 66.0 mm (2.6 in) in 1888.
Download the Data
Data for Port Hope standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Port Hope 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.