Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Port Dalhousie. 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 Dalhousie, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.1 C (61.0 F)
-24.0 C (-11.2 F)
n/a
n/a
Feb
15.0 C (59.0 F)
-24.5 C (-12.1 F)
n/a
n/a
Mar
24.4 C (75.9 F)
-16.7 C (1.9 F)
n/a
n/a
Apr
29.5 C (85.1 F)
-8.5 C (16.7 F)
n/a
n/a
May
33.3 C (91.9 F)
-2.8 C (27.0 F)
n/a
n/a
Jun
34.4 C (93.9 F)
2.2 C (36.0 F)
n/a
n/a
Jul
35.6 C (96.1 F)
6.7 C (44.1 F)
n/a
n/a
Aug
35.6 C (96.1 F)
3.9 C (39.0 F)
n/a
n/a
Sep
35.6 C (96.1 F)
0.0 C (32.0 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-6.1 C (21.0 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-13.3 C (8.1 F)
n/a
n/a
Dec
22.0 C (71.6 F)
-23.5 C (-10.3 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Port Dalhousie still stand. 1959 holds the most, with 82.
Standing records at Port Dalhousie by the year they were set
Year set
Standing records
1957
40
1958
37
1959
82
1960
47
1961
53
1962
59
1963
72
1964
67
1965
56
1966
64
1967
69
1968
38
1969
39
1970
48
1971
38
1972
46
1973
66
1974
55
1975
44
1976
71
1977
61
1978
49
1979
62
1980
46
1981
52
1982
54
1983
49
Wettest Day of Each Month
Aug: 97.8 mm (3.9 in)
The wettest day on record for each calendar month at Port Dalhousie. The most was 97.8 mm (3.9 in) on 6 August 1962.
Record daily precipitation for each month at Port Dalhousie
Month
Record daily precipitation (mm)
Date
Jan
34.8 mm (1.4 in)
11 January 1878
Feb
41.9 mm (1.6 in)
25 February 1961
Mar
36.6 mm (1.4 in)
27 March 1878
Apr
41.9 mm (1.6 in)
18 April 1969
May
58.4 mm (2.3 in)
6 May 1976
Jun
82.6 mm (3.3 in)
11 June 1970
Jul
57.7 mm (2.3 in)
23 July 1962
Aug
97.8 mm (3.9 in)
6 August 1962
Sep
50.0 mm (2.0 in)
5 September 1918
Oct
36.8 mm (1.4 in)
23 October 1912
Nov
40.6 mm (1.6 in)
9 November 1962
Dec
32.8 mm (1.3 in)
10 December 1969
Period of Record Coverage
1957 to 1983
Complete yearUnder 90 percent of days
27 years of record at Port Dalhousie, 1957 to 1983. 2 years have data for under 90 percent of days and are left out of rankings: 1957, 1965.
Cooler than the station meanWarmer than the station mean
One stripe for each of 25 complete years at Port Dalhousie, 1958 to 1983. Blue stripes are years cooler than the station's own mean of 8.8 C (47.9 F); red stripes are warmer. The coolest year was 1963, at 8.1 C (46.7 F), and the warmest was 1973, at 9.9 C (49.8 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Port Dalhousie as warming stripes, 1958 to 1983
Year
Annual mean temperature
Difference from the station mean
1958
8.6 C
-0.17 C
1959
9.4 C
+0.55 C
1960
8.7 C
-0.12 C
1961
9.2 C
+0.38 C
1962
8.6 C
-0.19 C
1963
8.1 C
-0.67 C
1964
8.8 C
+0.02 C
1966
8.7 C
-0.10 C
1967
8.5 C
-0.29 C
1968
8.7 C
-0.11 C
1969
8.7 C
-0.13 C
1970
8.9 C
+0.05 C
1971
9.1 C
+0.28 C
1972
8.2 C
-0.63 C
1973
9.9 C
+1.06 C
1974
8.9 C
+0.05 C
1975
9.7 C
+0.91 C
1976
8.2 C
-0.62 C
1977
8.8 C
-0.06 C
1978
8.2 C
-0.61 C
1979
8.7 C
-0.16 C
1980
8.6 C
-0.19 C
1981
9.0 C
+0.17 C
1982
8.7 C
-0.12 C
1983
9.6 C
+0.78 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
1874 to 1983
Yearly extremes at Port Dalhousie: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
35.6 C (96.1 F)
1966
33.3 C (91.9 F)
27
Coldest night (TNn)
-24.5 C (-12.1 F)
1979
-19.4 C (-2.9 F)
27
Wettest day (Rx1day)
97.8 mm (3.9 in)
1962
37.3 mm (1.5 in)
44
Wettest five days (Rx5day)
107.6 mm (4.2 in)
1917
64.1 mm (2.5 in)
44
Longest dry spell (CDD)
31 days
1963
17 days
44
Hottest day (TXx)
The hottest day of the year at Port Dalhousie, 1874 to 1983. The record is 35.6 C (96.1 F) in 1966, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Port Dalhousie by year
Year
Hottest day (TXx)
1874
n/a
1875
n/a
1876
n/a
1878
n/a
1879
n/a
1910
n/a
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1957
34.4 C (93.9 F)
1958
32.2 C (90.0 F)
1959
34.4 C (93.9 F)
1960
32.8 C (91.0 F)
1961
32.8 C (91.0 F)
1962
33.3 C (91.9 F)
1963
34.4 C (93.9 F)
1964
33.9 C (93.0 F)
1965
33.3 C (91.9 F)
1966
35.6 C (96.1 F)
1967
31.7 C (89.1 F)
1968
33.9 C (93.0 F)
1969
33.9 C (93.0 F)
1970
32.2 C (90.0 F)
1971
32.8 C (91.0 F)
1972
33.3 C (91.9 F)
1973
35.6 C (96.1 F)
1974
33.9 C (93.0 F)
1975
35.6 C (96.1 F)
1976
31.7 C (89.1 F)
1977
35.5 C (95.9 F)
1978
35.5 C (95.9 F)
1979
32.0 C (89.6 F)
1980
32.5 C (90.5 F)
1981
33.0 C (91.4 F)
1982
33.0 C (91.4 F)
1983
34.0 C (93.2 F)
Coldest night (TNn)
The coldest night of the year at Port Dalhousie, 1874 to 1983. The record is -24.5 C (-12.1 F) in 1979, marked on the chart; the median year is -19.4 C (-2.9 F).
Coldest night (TNn) at Port Dalhousie by year
Year
Coldest night (TNn)
1874
n/a
1875
n/a
1876
n/a
1878
n/a
1879
n/a
1910
n/a
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1957
-12.8 C (9.0 F)
1958
-18.9 C (-2.0 F)
1959
-18.9 C (-2.0 F)
1960
-18.3 C (-0.9 F)
1961
-18.9 C (-2.0 F)
1962
-19.4 C (-2.9 F)
1963
-22.2 C (-8.0 F)
1964
-16.7 C (1.9 F)
1965
-22.8 C (-9.0 F)
1966
-20.0 C (-4.0 F)
1967
-20.6 C (-5.1 F)
1968
-21.1 C (-6.0 F)
1969
-17.8 C (0.0 F)
1970
-20.0 C (-4.0 F)
1971
-19.4 C (-2.9 F)
1972
-19.4 C (-2.9 F)
1973
-16.7 C (1.9 F)
1974
-18.9 C (-2.0 F)
1975
-15.6 C (3.9 F)
1976
-22.2 C (-8.0 F)
1977
-20.0 C (-4.0 F)
1978
-16.5 C (2.3 F)
1979
-24.5 C (-12.1 F)
1980
-23.5 C (-10.3 F)
1981
-21.5 C (-6.7 F)
1982
-24.0 C (-11.2 F)
1983
-16.5 C (2.3 F)
Wettest day (Rx1day)
The wettest day of the year at Port Dalhousie, 1874 to 1983. The record is 97.8 mm (3.9 in) in 1962, marked on the chart; the median year is 37.3 mm (1.5 in).
Wettest day (Rx1day) at Port Dalhousie by year
Year
Wettest day (Rx1day)
1874
23.6 mm (0.9 in)
1875
32.8 mm (1.3 in)
1876
28.4 mm (1.1 in)
1878
36.6 mm (1.4 in)
1879
23.9 mm (0.9 in)
1910
35.3 mm (1.4 in)
1911
30.7 mm (1.2 in)
1912
37.1 mm (1.5 in)
1913
57.2 mm (2.3 in)
1914
33.3 mm (1.3 in)
1915
65.8 mm (2.6 in)
1916
42.2 mm (1.7 in)
1917
79.2 mm (3.1 in)
1918
70.6 mm (2.8 in)
1919
35.6 mm (1.4 in)
1920
46.5 mm (1.8 in)
1921
38.1 mm (1.5 in)
1957
50.8 mm (2.0 in)
1958
30.5 mm (1.2 in)
1959
36.8 mm (1.4 in)
1960
29.2 mm (1.1 in)
1961
41.9 mm (1.6 in)
1962
97.8 mm (3.9 in)
1963
49.8 mm (2.0 in)
1964
55.9 mm (2.2 in)
1965
26.7 mm (1.1 in)
1966
41.4 mm (1.6 in)
1967
37.3 mm (1.5 in)
1968
73.2 mm (2.9 in)
1969
41.9 mm (1.6 in)
1970
82.6 mm (3.3 in)
1971
53.3 mm (2.1 in)
1972
50.8 mm (2.0 in)
1973
38.9 mm (1.5 in)
1974
27.4 mm (1.1 in)
1975
27.4 mm (1.1 in)
1976
58.4 mm (2.3 in)
1977
35.0 mm (1.4 in)
1978
37.0 mm (1.5 in)
1979
33.4 mm (1.3 in)
1980
37.4 mm (1.5 in)
1981
42.2 mm (1.7 in)
1982
36.8 mm (1.4 in)
1983
37.0 mm (1.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Port Dalhousie, 1874 to 1983. The record is 107.6 mm (4.2 in) in 1917, marked on the chart; the median year is 64.1 mm (2.5 in).
Wettest five days (Rx5day) at Port Dalhousie by year
Year
Wettest five days (Rx5day)
1874
26.2 mm (1.0 in)
1875
46.5 mm (1.8 in)
1876
43.9 mm (1.7 in)
1878
49.5 mm (1.9 in)
1879
23.9 mm (0.9 in)
1910
72.4 mm (2.9 in)
1911
47.4 mm (1.9 in)
1912
62.5 mm (2.5 in)
1913
85.4 mm (3.4 in)
1914
56.2 mm (2.2 in)
1915
69.4 mm (2.7 in)
1916
64.0 mm (2.5 in)
1917
107.6 mm (4.2 in)
1918
90.9 mm (3.6 in)
1919
50.8 mm (2.0 in)
1920
47.3 mm (1.9 in)
1921
55.9 mm (2.2 in)
1957
65.0 mm (2.6 in)
1958
48.6 mm (1.9 in)
1959
64.2 mm (2.5 in)
1960
51.6 mm (2.0 in)
1961
68.5 mm (2.7 in)
1962
103.4 mm (4.1 in)
1963
72.7 mm (2.9 in)
1964
70.1 mm (2.8 in)
1965
37.9 mm (1.5 in)
1966
61.9 mm (2.4 in)
1967
70.3 mm (2.8 in)
1968
79.0 mm (3.1 in)
1969
63.5 mm (2.5 in)
1970
88.4 mm (3.5 in)
1971
68.6 mm (2.7 in)
1972
57.5 mm (2.3 in)
1973
76.2 mm (3.0 in)
1974
57.5 mm (2.3 in)
1975
40.9 mm (1.6 in)
1976
88.9 mm (3.5 in)
1977
87.8 mm (3.5 in)
1978
69.4 mm (2.7 in)
1979
67.6 mm (2.7 in)
1980
42.0 mm (1.7 in)
1981
77.4 mm (3.0 in)
1982
67.6 mm (2.7 in)
1983
54.0 mm (2.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Port Dalhousie, 1874 to 1983. The record is 31 days in 1963, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Port Dalhousie by year
Year
Longest dry spell (CDD)
1874
15 days
1875
13 days
1876
18 days
1878
14 days
1879
15 days
1910
17 days
1911
14 days
1912
24 days
1913
17 days
1914
18 days
1915
18 days
1916
12 days
1917
22 days
1918
19 days
1919
26 days
1920
15 days
1921
15 days
1957
23 days
1958
18 days
1959
15 days
1960
13 days
1961
19 days
1962
18 days
1963
31 days
1964
11 days
1965
13 days
1966
17 days
1967
14 days
1968
18 days
1969
22 days
1970
14 days
1971
11 days
1972
14 days
1973
15 days
1974
17 days
1975
18 days
1976
20 days
1977
13 days
1978
17 days
1979
10 days
1980
15 days
1981
11 days
1982
17 days
1983
19 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
25 years with a frost
Across 25 years with a frost, the median last spring frost at Port Dalhousie falls on 29 April and the median first autumn frost on 19 October, which leaves a median of 174 days between them.
Fitted over all years, the growing season changes by +5.5 days per decade at this station.
Frost dates and growing season at Port Dalhousie
Measure
Median, all years
Earliest period
Recent period (1958 to 1983)
Recent against earliest
Fitted trend
Last spring frost
29 April
n/a
29 April
n/a
-4.4 days per decade
First autumn frost
19 October
n/a
19 October
n/a
+1.0 days per decade
Growing days
174 days
n/a
174 days
n/a
+5.5 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
38 years, 1875 to 1983
A day with at least 40.7 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 120.3 mm (4.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Port Dalhousie: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
40.7 mm (1.6 in)
5 years
54.1 mm (2.1 in)
10 years
65.4 mm (2.6 in)
25 years
83.5 mm (3.3 in)
50 years
100.3 mm (3.9 in)
Longer than the 38 years of record
100 years
120.3 mm (4.7 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 1875 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: 97.8 mm (3.9 in) in 1962; 82.6 mm (3.3 in) in 1970; 79.2 mm (3.1 in) in 1917.
Download the Data
Data for Port Dalhousie standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Port Dalhousie 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.