Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Fergus Shand Dam. 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 Fergus Shand Dam, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.6 C (60.1 F)
-33.3 C (-27.9 F)
n/a
n/a
Feb
11.7 C (53.1 F)
-32.8 C (-27.0 F)
n/a
n/a
Mar
23.9 C (75.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Apr
26.1 C (79.0 F)
-17.2 C (1.0 F)
n/a
n/a
May
30.0 C (86.0 F)
-6.1 C (21.0 F)
n/a
n/a
Jun
32.8 C (91.0 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
34.4 C (93.9 F)
2.2 C (36.0 F)
n/a
n/a
Aug
35.0 C (95.0 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-11.7 C (10.9 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-18.3 C (-0.9 F)
n/a
n/a
Dec
17.5 C (63.5 F)
-34.4 C (-29.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Fergus Shand Dam still stand. 1940 holds the most, with 56.
Standing records at Fergus Shand Dam by the year they were set
Year set
Standing records
1939
6
1940
56
1941
32
1942
30
1943
44
1944
29
1945
53
1946
53
1947
36
1948
37
1949
42
1950
47
1951
23
1952
25
1953
36
1954
34
1955
48
1956
30
1957
32
1958
27
1959
35
1960
15
1961
20
1962
32
1963
40
1964
36
1965
41
1966
27
1967
37
1968
32
1969
21
1970
22
1971
16
1972
24
1973
22
1974
17
1975
32
1976
37
1977
44
1978
29
1979
48
1980
20
1981
38
1982
35
1983
24
All-Time Record Progression
1 new records
1 all-time records were set at Fergus Shand Dam between 11 January 1981 and 11 January 1981. Each dot is a new record.
When Fergus Shand Dam set new all-time records
Date
Kind
Detail
1981-01-11
Record low maximum temperature
Record low maximum temperature -21.0 C (-5.8 F)
Wettest Day of Each Month
Aug: 117.6 mm (4.6 in)
The wettest day on record for each calendar month at Fergus Shand Dam. The most was 117.6 mm (4.6 in) on 5 August 1968.
Record daily precipitation for each month at Fergus Shand Dam
Month
Record daily precipitation (mm)
Date
Jan
25.4 mm (1.0 in)
22 January 1966
Feb
31.8 mm (1.3 in)
15 February 1954
Mar
42.4 mm (1.7 in)
16 March 1942
Apr
48.3 mm (1.9 in)
2 April 1967
May
87.9 mm (3.5 in)
24 May 1955
Jun
113.5 mm (4.5 in)
10 June 1967
Jul
70.6 mm (2.8 in)
9 July 1949
Aug
117.6 mm (4.6 in)
5 August 1968
Sep
58.9 mm (2.3 in)
27 September 1942
Oct
78.7 mm (3.1 in)
15 October 1954
Nov
61.0 mm (2.4 in)
24 November 1950
Dec
39.4 mm (1.6 in)
27 December 1942
Period of Record Coverage
1939 to 1983
Complete yearUnder 90 percent of days
45 years of record at Fergus Shand Dam, 1939 to 1983. 5 years have data for under 90 percent of days and are left out of rankings: 1939, 1942, 1951, 1956, 1971.
Cooler than the station meanWarmer than the station mean
One stripe for each of 37 complete years at Fergus Shand Dam, 1940 to 1983. Blue stripes are years cooler than the station's own mean of 5.7 C (42.3 F); red stripes are warmer. The coolest year was 1943, at 4.2 C (39.6 F), and the warmest was 1953, at 7.1 C (44.8 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Fergus Shand Dam as warming stripes, 1940 to 1983
Year
Annual mean temperature
Difference from the station mean
1940
4.3 C
-1.46 C
1941
5.8 C
+0.08 C
1943
4.2 C
-1.49 C
1944
5.9 C
+0.17 C
1945
5.3 C
-0.41 C
1946
6.7 C
+0.94 C
1947
5.8 C
+0.09 C
1948
6.0 C
+0.24 C
1950
5.3 C
-0.41 C
1952
6.7 C
+0.96 C
1953
7.1 C
+1.38 C
1954
6.3 C
+0.58 C
1955
6.7 C
+1.01 C
1957
6.1 C
+0.42 C
1958
5.3 C
-0.41 C
1959
5.9 C
+0.22 C
1961
6.0 C
+0.29 C
1963
4.9 C
-0.86 C
1964
5.4 C
-0.37 C
1965
4.6 C
-1.09 C
1966
5.4 C
-0.31 C
1967
4.9 C
-0.81 C
1968
5.5 C
-0.21 C
1969
5.5 C
-0.18 C
1970
5.3 C
-0.46 C
1972
5.1 C
-0.59 C
1973
7.0 C
+1.32 C
1974
5.7 C
-0.07 C
1975
6.5 C
+0.73 C
1976
5.1 C
-0.66 C
1977
6.0 C
+0.30 C
1978
5.2 C
-0.57 C
1979
5.7 C
+0.00 C
1980
5.5 C
-0.25 C
1981
6.1 C
+0.42 C
1982
6.0 C
+0.27 C
1983
6.7 C
+1.01 C
The fitted trend in annual mean temperature here over 1940 to 1983 is 0.05 C (-0.14 to 0.23) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.4) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Fergus Shand Dam
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.05 C (-0.14 to 0.23) per decade
0.1 F (-0.2 to 0.4) per decade
1940 to 1983
37
Not clearly different from zero
Mean daily maximum
-0.16 C (-0.36 to 0.04) per decade
-0.3 F (-0.6 to 0.1) per decade
1940 to 1983
37
Not clearly different from zero
Mean daily minimum
0.3 C (0.1 to 0.5) per decade
0.5 F (0.1 to 0.8) per decade
1940 to 1983
37
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
1939 to 1983
Yearly extremes at Fergus Shand Dam: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
35.0 C (95.0 F)
1948
31.1 C (88.0 F)
45
Coldest night (TNn)
-34.4 C (-29.9 F)
1942
-27.2 C (-17.0 F)
45
Wettest day (Rx1day)
117.6 mm (4.6 in)
1968
48.8 mm (1.9 in)
45
Wettest five days (Rx5day)
161.5 mm (6.4 in)
1967
65.1 mm (2.6 in)
45
Longest dry spell (CDD)
31 days
1960
17 days
45
Hottest day (TXx)
The hottest day of the year at Fergus Shand Dam, 1939 to 1983. The record is 35.0 C (95.0 F) in 1948, marked on the chart; the median year is 31.1 C (88.0 F).
Hottest day (TXx) at Fergus Shand Dam by year
Year
Hottest day (TXx)
1939
23.9 C (75.0 F)
1940
31.1 C (88.0 F)
1941
34.4 C (93.9 F)
1942
31.7 C (89.1 F)
1943
31.7 C (89.1 F)
1944
33.9 C (93.0 F)
1945
30.6 C (87.1 F)
1946
32.8 C (91.0 F)
1947
32.8 C (91.0 F)
1948
35.0 C (95.0 F)
1949
33.3 C (91.9 F)
1950
31.1 C (88.0 F)
1951
31.1 C (88.0 F)
1952
32.2 C (90.0 F)
1953
35.0 C (95.0 F)
1954
32.2 C (90.0 F)
1955
35.0 C (95.0 F)
1956
30.0 C (86.0 F)
1957
31.7 C (89.1 F)
1958
29.4 C (84.9 F)
1959
30.6 C (87.1 F)
1960
31.1 C (88.0 F)
1961
31.1 C (88.0 F)
1962
30.0 C (86.0 F)
1963
32.2 C (90.0 F)
1964
31.1 C (88.0 F)
1965
30.6 C (87.1 F)
1966
32.2 C (90.0 F)
1967
30.0 C (86.0 F)
1968
31.1 C (88.0 F)
1969
31.7 C (89.1 F)
1970
30.6 C (87.1 F)
1971
29.4 C (84.9 F)
1972
31.1 C (88.0 F)
1973
32.8 C (91.0 F)
1974
31.7 C (89.1 F)
1975
32.2 C (90.0 F)
1976
28.9 C (84.0 F)
1977
33.0 C (91.4 F)
1978
32.5 C (90.5 F)
1979
30.5 C (86.9 F)
1980
29.5 C (85.1 F)
1981
30.0 C (86.0 F)
1982
29.5 C (85.1 F)
1983
31.5 C (88.7 F)
Coldest night (TNn)
The coldest night of the year at Fergus Shand Dam, 1939 to 1983. The record is -34.4 C (-29.9 F) in 1942, marked on the chart; the median year is -27.2 C (-17.0 F).
Coldest night (TNn) at Fergus Shand Dam by year
Year
Coldest night (TNn)
1939
-17.8 C (0.0 F)
1940
-28.3 C (-18.9 F)
1941
-30.0 C (-22.0 F)
1942
-34.4 C (-29.9 F)
1943
-31.1 C (-24.0 F)
1944
-23.3 C (-9.9 F)
1945
-28.9 C (-20.0 F)
1946
-25.0 C (-13.0 F)
1947
-22.8 C (-9.0 F)
1948
-33.3 C (-27.9 F)
1949
-22.8 C (-9.0 F)
1950
-30.0 C (-22.0 F)
1951
-27.8 C (-18.0 F)
1952
-27.8 C (-18.0 F)
1953
-24.4 C (-11.9 F)
1954
-24.4 C (-11.9 F)
1955
-27.2 C (-17.0 F)
1956
-24.4 C (-11.9 F)
1957
-26.7 C (-16.1 F)
1958
-29.4 C (-20.9 F)
1959
-28.3 C (-18.9 F)
1960
-26.7 C (-16.1 F)
1961
-25.6 C (-14.1 F)
1962
-26.7 C (-16.1 F)
1963
-29.4 C (-20.9 F)
1964
-25.6 C (-14.1 F)
1965
-26.7 C (-16.1 F)
1966
-26.1 C (-15.0 F)
1967
-27.8 C (-18.0 F)
1968
-28.9 C (-20.0 F)
1969
-24.4 C (-11.9 F)
1970
-31.7 C (-25.1 F)
1971
-27.2 C (-17.0 F)
1972
-27.2 C (-17.0 F)
1973
-24.4 C (-11.9 F)
1974
-22.2 C (-8.0 F)
1975
-26.7 C (-16.1 F)
1976
-31.1 C (-24.0 F)
1977
-32.8 C (-27.0 F)
1978
-28.0 C (-18.4 F)
1979
-31.5 C (-24.7 F)
1980
-32.0 C (-25.6 F)
1981
-31.0 C (-23.8 F)
1982
-28.0 C (-18.4 F)
1983
-24.0 C (-11.2 F)
Wettest day (Rx1day)
The wettest day of the year at Fergus Shand Dam, 1939 to 1983. The record is 117.6 mm (4.6 in) in 1968, marked on the chart; the median year is 48.8 mm (1.9 in).
Wettest day (Rx1day) at Fergus Shand Dam by year
Year
Wettest day (Rx1day)
1939
16.0 mm (0.6 in)
1940
47.2 mm (1.9 in)
1941
41.9 mm (1.6 in)
1942
58.9 mm (2.3 in)
1943
44.7 mm (1.8 in)
1944
43.9 mm (1.7 in)
1945
49.5 mm (1.9 in)
1946
34.3 mm (1.4 in)
1947
59.7 mm (2.4 in)
1948
42.7 mm (1.7 in)
1949
70.6 mm (2.8 in)
1950
61.0 mm (2.4 in)
1951
36.6 mm (1.4 in)
1952
65.5 mm (2.6 in)
1953
51.1 mm (2.0 in)
1954
78.7 mm (3.1 in)
1955
87.9 mm (3.5 in)
1956
76.7 mm (3.0 in)
1957
38.9 mm (1.5 in)
1958
46.2 mm (1.8 in)
1959
46.2 mm (1.8 in)
1960
50.8 mm (2.0 in)
1961
46.5 mm (1.8 in)
1962
53.1 mm (2.1 in)
1963
29.2 mm (1.1 in)
1964
53.3 mm (2.1 in)
1965
48.8 mm (1.9 in)
1966
34.5 mm (1.4 in)
1967
113.5 mm (4.5 in)
1968
117.6 mm (4.6 in)
1969
41.4 mm (1.6 in)
1970
33.0 mm (1.3 in)
1971
54.6 mm (2.1 in)
1972
67.3 mm (2.6 in)
1973
55.1 mm (2.2 in)
1974
65.5 mm (2.6 in)
1975
42.2 mm (1.7 in)
1976
59.2 mm (2.3 in)
1977
38.4 mm (1.5 in)
1978
43.6 mm (1.7 in)
1979
32.2 mm (1.3 in)
1980
62.8 mm (2.5 in)
1981
50.2 mm (2.0 in)
1982
31.2 mm (1.2 in)
1983
36.6 mm (1.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Fergus Shand Dam, 1939 to 1983. The record is 161.5 mm (6.4 in) in 1967, marked on the chart; the median year is 65.1 mm (2.6 in).
Wettest five days (Rx5day) at Fergus Shand Dam by year
Year
Wettest five days (Rx5day)
1939
30.8 mm (1.2 in)
1940
80.8 mm (3.2 in)
1941
58.2 mm (2.3 in)
1942
91.9 mm (3.6 in)
1943
63.0 mm (2.5 in)
1944
61.9 mm (2.4 in)
1945
58.7 mm (2.3 in)
1946
47.0 mm (1.9 in)
1947
59.7 mm (2.4 in)
1948
66.8 mm (2.6 in)
1949
85.6 mm (3.4 in)
1950
92.2 mm (3.6 in)
1951
58.7 mm (2.3 in)
1952
67.8 mm (2.7 in)
1953
89.2 mm (3.5 in)
1954
146.2 mm (5.8 in)
1955
111.8 mm (4.4 in)
1956
125.2 mm (4.9 in)
1957
87.5 mm (3.4 in)
1958
55.5 mm (2.2 in)
1959
49.5 mm (1.9 in)
1960
85.1 mm (3.4 in)
1961
58.0 mm (2.3 in)
1962
59.2 mm (2.3 in)
1963
58.4 mm (2.3 in)
1964
57.9 mm (2.3 in)
1965
99.6 mm (3.9 in)
1966
64.7 mm (2.5 in)
1967
161.5 mm (6.4 in)
1968
126.5 mm (5.0 in)
1969
51.3 mm (2.0 in)
1970
43.5 mm (1.7 in)
1971
64.6 mm (2.5 in)
1972
102.4 mm (4.0 in)
1973
87.6 mm (3.4 in)
1974
90.4 mm (3.6 in)
1975
62.5 mm (2.5 in)
1976
65.1 mm (2.6 in)
1977
66.8 mm (2.6 in)
1978
93.0 mm (3.7 in)
1979
62.0 mm (2.4 in)
1980
79.2 mm (3.1 in)
1981
69.0 mm (2.7 in)
1982
64.2 mm (2.5 in)
1983
64.4 mm (2.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Fergus Shand Dam, 1939 to 1983. The record is 31 days in 1960, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Fergus Shand Dam by year
Year
Longest dry spell (CDD)
1939
20 days
1940
14 days
1941
27 days
1942
19 days
1943
28 days
1944
17 days
1945
13 days
1946
25 days
1947
21 days
1948
20 days
1949
19 days
1950
25 days
1951
12 days
1952
14 days
1953
13 days
1954
23 days
1955
24 days
1956
19 days
1957
22 days
1958
15 days
1959
14 days
1960
31 days
1961
17 days
1962
18 days
1963
31 days
1964
12 days
1965
15 days
1966
17 days
1967
21 days
1968
13 days
1969
18 days
1970
12 days
1971
13 days
1972
12 days
1973
13 days
1974
12 days
1975
17 days
1976
12 days
1977
23 days
1978
16 days
1979
16 days
1980
14 days
1981
11 days
1982
11 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
37 years with a frost
Across 37 years with a frost, the median last spring frost at Fergus Shand Dam falls on 11 May and the median first autumn frost on 30 September, which leaves a median of 139 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 Fergus Shand Dam
Measure
Median, all years
Earliest period
Recent period (1948 to 1983)
Recent against earliest
Fitted trend
Last spring frost
11 May
n/a
12 May
n/a
-0.9 days per decade
First autumn frost
30 September
n/a
1 October
n/a
+0.1 days per decade
Growing days
139 days
n/a
139 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
40 years, 1940 to 1983
A day with at least 49.2 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 131.6 mm (5.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Fergus Shand Dam: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
49.2 mm (1.9 in)
5 years
65.3 mm (2.6 in)
10 years
78.0 mm (3.1 in)
25 years
96.8 mm (3.8 in)
50 years
113.1 mm (4.5 in)
Longer than the 40 years of record
100 years
131.6 mm (5.2 in)
Longer than the 40 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, 40 years of values from 1940 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: 117.6 mm (4.6 in) in 1968; 113.5 mm (4.5 in) in 1967; 87.9 mm (3.5 in) in 1955.
Download the Data
Data for Fergus Shand Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Fergus Shand Dam 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.