Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Whitesand 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 Whitesand Dam, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
5.0 C (41.0 F)
-48.5 C (-55.3 F)
n/a
n/a
Feb
7.8 C (46.0 F)
-48.9 C (-56.0 F)
n/a
n/a
Mar
13.9 C (57.0 F)
-43.9 C (-47.0 F)
n/a
n/a
Apr
29.0 C (84.2 F)
-36.1 C (-33.0 F)
n/a
n/a
May
34.4 C (93.9 F)
-15.6 C (3.9 F)
n/a
n/a
Jun
32.2 C (90.0 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
39.4 C (102.9 F)
0.0 C (32.0 F)
n/a
n/a
Aug
35.0 C (95.0 F)
-3.9 C (25.0 F)
n/a
n/a
Sep
31.1 C (88.0 F)
-8.9 C (16.0 F)
n/a
n/a
Oct
23.9 C (75.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Nov
14.0 C (57.2 F)
-37.8 C (-36.0 F)
n/a
n/a
Dec
6.1 C (43.0 F)
-43.3 C (-45.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Whitesand Dam still stand. 1939 holds the most, with 57.
Standing records at Whitesand Dam by the year they were set
Year set
Standing records
1938
55
1939
57
1940
40
1941
39
1942
52
1943
48
1944
35
1945
32
1946
40
1947
37
1948
35
1949
30
1950
33
1951
45
1952
13
1953
27
1954
44
1955
44
1956
33
1957
26
1958
39
1959
25
1960
12
1961
23
1962
19
1963
31
1964
29
1965
31
1966
27
1967
25
1968
26
1969
31
1970
21
1971
12
1972
54
1973
29
1974
27
1975
13
1976
29
1977
42
1978
13
1979
19
1980
30
1981
46
1982
24
1983
22
All-Time Record Progression
3 new records
3 all-time records were set at Whitesand Dam between 3 January 1968 and 17 August 1978. Each dot is a new record.
When Whitesand Dam set new all-time records
Date
Kind
Detail
1968-01-03
Record low maximum temperature
Record low maximum temperature -38.3 C (-36.9 F)
1972-01-13
Record low maximum temperature
Record low maximum temperature -38.9 C (-38.0 F)
1978-08-17
Record daily precipitation
Record daily precipitation 61.2 mm (2.4 in)
Wettest Day of Each Month
Aug: 61.2 mm (2.4 in)
The wettest day on record for each calendar month at Whitesand Dam. The most was 61.2 mm (2.4 in) on 17 August 1978.
Record daily precipitation for each month at Whitesand Dam
Month
Record daily precipitation (mm)
Date
Jan
13.2 mm (0.5 in)
15 January 1973
Feb
18.6 mm (0.7 in)
21 February 1982
Mar
25.4 mm (1.0 in)
27 March 1957
Apr
22.9 mm (0.9 in)
4 April 1939
May
39.6 mm (1.6 in)
31 May 1949
Jun
45.2 mm (1.8 in)
22 June 1977
Jul
53.0 mm (2.1 in)
7 July 1981
Aug
61.2 mm (2.4 in)
17 August 1978
Sep
60.2 mm (2.4 in)
3 September 1964
Oct
48.8 mm (1.9 in)
13 October 1954
Nov
25.4 mm (1.0 in)
25 November 1944
Dec
25.1 mm (1.0 in)
17 December 1967
Period of Record Coverage
1938 to 1983
Complete yearUnder 90 percent of days
46 years of record at Whitesand Dam, 1938 to 1983. 3 years have data for under 90 percent of days and are left out of rankings: 1940, 1952, 1961.
Cooler than the station meanWarmer than the station mean
One stripe for each of 42 complete years at Whitesand Dam, 1938 to 1983. Blue stripes are years cooler than the station's own mean of -2.5 C (27.5 F); red stripes are warmer. The coolest year was 1972, at -4.9 C (23.3 F), and the warmest was 1981, at 0.4 C (32.6 F). The strongest colour marks a difference of 2.9 C (5.2 F).
Annual mean temperature at Whitesand Dam as warming stripes, 1938 to 1983
Year
Annual mean temperature
Difference from the station mean
1938
-3.0 C
-0.45 C
1939
-2.7 C
-0.21 C
1941
-2.1 C
+0.41 C
1942
-2.5 C
+0.01 C
1943
-1.9 C
+0.61 C
1944
-0.7 C
+1.81 C
1945
-2.9 C
-0.36 C
1946
-2.7 C
-0.15 C
1947
-3.0 C
-0.49 C
1948
-1.4 C
+1.08 C
1949
-2.8 C
-0.33 C
1950
-4.1 C
-1.63 C
1951
-3.1 C
-0.58 C
1954
-1.9 C
+0.61 C
1955
-2.6 C
-0.10 C
1956
-2.5 C
+0.06 C
1957
-2.8 C
-0.29 C
1958
-1.8 C
+0.72 C
1959
-2.5 C
-0.03 C
1960
-2.5 C
-0.01 C
1962
-3.1 C
-0.54 C
1963
-2.1 C
+0.41 C
1964
-2.4 C
+0.07 C
1965
-3.2 C
-0.66 C
1966
-3.3 C
-0.83 C
1967
-3.3 C
-0.82 C
1968
-3.2 C
-0.64 C
1969
-3.5 C
-1.01 C
1970
-4.0 C
-1.48 C
1971
-3.2 C
-0.71 C
1972
-4.9 C
-2.34 C
1973
-1.2 C
+1.31 C
1974
-2.7 C
-0.14 C
1975
-2.4 C
+0.11 C
1976
-1.8 C
+0.71 C
1977
-0.8 C
+1.72 C
1978
-2.6 C
-0.08 C
1979
-2.8 C
-0.25 C
1980
-1.1 C
+1.46 C
1981
0.4 C
+2.87 C
1982
-3.7 C
-1.15 C
1983
-1.2 C
+1.36 C
The fitted trend in annual mean temperature here over 1938 to 1983 is 0.1 C (-0.2 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.3 to 0.6) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Whitesand Dam
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.2 to 0.3) per decade
0.1 F (-0.3 to 0.6) per decade
1938 to 1983
42
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.2) per decade
-0.1 F (-0.6 to 0.4) per decade
1938 to 1983
42
Not clearly different from zero
Mean daily minimum
0.21 C (-0.03 to 0.45) per decade
0.4 F (-0.1 to 0.8) per decade
1938 to 1983
42
Not clearly different from zero
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
1937 to 1983
Yearly extremes at Whitesand Dam: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
1941
31.0 C (87.8 F)
46
Coldest night (TNn)
-48.9 C (-56.0 F)
1941
-42.8 C (-45.0 F)
46
Wettest day (Rx1day)
61.2 mm (2.4 in)
1978
31.2 mm (1.2 in)
47
Wettest five days (Rx5day)
88.8 mm (3.5 in)
1979
46.0 mm (1.8 in)
47
Longest dry spell (CDD)
44 days
1942
22 days
47
Hottest day (TXx)
The hottest day of the year at Whitesand Dam, 1937 to 1983. The record is 39.4 C (102.9 F) in 1941, marked on the chart; the median year is 31.0 C (87.8 F).
Hottest day (TXx) at Whitesand Dam by year
Year
Hottest day (TXx)
1937
n/a
1938
24.4 C (75.9 F)
1939
31.1 C (88.0 F)
1940
35.0 C (95.0 F)
1941
39.4 C (102.9 F)
1942
32.2 C (90.0 F)
1943
32.2 C (90.0 F)
1944
34.4 C (93.9 F)
1945
33.3 C (91.9 F)
1946
35.0 C (95.0 F)
1947
36.1 C (97.0 F)
1948
33.3 C (91.9 F)
1949
31.7 C (89.1 F)
1950
37.2 C (99.0 F)
1951
32.8 C (91.0 F)
1952
29.4 C (84.9 F)
1953
32.8 C (91.0 F)
1954
31.1 C (88.0 F)
1955
33.9 C (93.0 F)
1956
32.2 C (90.0 F)
1957
27.2 C (81.0 F)
1958
27.8 C (82.0 F)
1959
28.3 C (82.9 F)
1960
30.6 C (87.1 F)
1961
30.0 C (86.0 F)
1962
27.2 C (81.0 F)
1963
30.0 C (86.0 F)
1964
28.9 C (84.0 F)
1965
26.7 C (80.1 F)
1966
26.1 C (79.0 F)
1967
31.1 C (88.0 F)
1968
24.4 C (75.9 F)
1969
28.3 C (82.9 F)
1970
31.7 C (89.1 F)
1971
28.9 C (84.0 F)
1972
30.6 C (87.1 F)
1973
29.4 C (84.9 F)
1974
30.0 C (86.0 F)
1975
32.2 C (90.0 F)
1976
28.9 C (84.0 F)
1977
26.7 C (80.1 F)
1978
30.0 C (86.0 F)
1979
33.5 C (92.3 F)
1980
31.0 C (87.8 F)
1981
31.0 C (87.8 F)
1982
29.0 C (84.2 F)
1983
32.0 C (89.6 F)
Coldest night (TNn)
The coldest night of the year at Whitesand Dam, 1937 to 1983. The record is -48.9 C (-56.0 F) in 1941, marked on the chart; the median year is -42.8 C (-45.0 F).
Coldest night (TNn) at Whitesand Dam by year
Year
Coldest night (TNn)
1937
n/a
1938
-43.3 C (-45.9 F)
1939
-45.6 C (-50.1 F)
1940
-41.1 C (-42.0 F)
1941
-48.9 C (-56.0 F)
1942
-43.3 C (-45.9 F)
1943
-47.2 C (-53.0 F)
1944
-42.8 C (-45.0 F)
1945
-42.2 C (-44.0 F)
1946
-44.4 C (-47.9 F)
1947
-46.1 C (-51.0 F)
1948
-39.4 C (-38.9 F)
1949
-42.2 C (-44.0 F)
1950
-46.7 C (-52.1 F)
1951
-42.8 C (-45.0 F)
1952
-41.7 C (-43.1 F)
1953
-42.2 C (-44.0 F)
1954
-45.6 C (-50.1 F)
1955
-43.9 C (-47.0 F)
1956
-42.8 C (-45.0 F)
1957
-44.4 C (-47.9 F)
1958
-41.1 C (-42.0 F)
1959
-41.7 C (-43.1 F)
1960
-40.6 C (-41.1 F)
1961
-40.0 C (-40.0 F)
1962
-44.4 C (-47.9 F)
1963
-43.3 C (-45.9 F)
1964
-40.0 C (-40.0 F)
1965
-45.6 C (-50.1 F)
1966
-43.9 C (-47.0 F)
1967
-43.9 C (-47.0 F)
1968
-44.4 C (-47.9 F)
1969
-42.8 C (-45.0 F)
1970
-43.3 C (-45.9 F)
1971
-42.2 C (-44.0 F)
1972
-43.3 C (-45.9 F)
1973
-43.3 C (-45.9 F)
1974
-42.2 C (-44.0 F)
1975
-42.2 C (-44.0 F)
1976
-41.1 C (-42.0 F)
1977
-41.1 C (-42.0 F)
1978
-38.3 C (-36.9 F)
1979
-40.0 C (-40.0 F)
1980
-36.0 C (-32.8 F)
1981
-40.0 C (-40.0 F)
1982
-48.5 C (-55.3 F)
1983
-40.5 C (-40.9 F)
Wettest day (Rx1day)
The wettest day of the year at Whitesand Dam, 1937 to 1983. The record is 61.2 mm (2.4 in) in 1978, marked on the chart; the median year is 31.2 mm (1.2 in).
Wettest day (Rx1day) at Whitesand Dam by year
Year
Wettest day (Rx1day)
1937
8.9 mm (0.35 in)
1938
18.5 mm (0.7 in)
1939
42.2 mm (1.7 in)
1940
15.7 mm (0.6 in)
1941
30.0 mm (1.2 in)
1942
41.7 mm (1.6 in)
1943
19.1 mm (0.8 in)
1944
25.4 mm (1.0 in)
1945
23.9 mm (0.9 in)
1946
26.4 mm (1.0 in)
1947
23.1 mm (0.9 in)
1948
31.2 mm (1.2 in)
1949
39.6 mm (1.6 in)
1950
31.2 mm (1.2 in)
1951
21.1 mm (0.8 in)
1952
18.3 mm (0.7 in)
1953
32.8 mm (1.3 in)
1954
48.8 mm (1.9 in)
1955
25.4 mm (1.0 in)
1956
13.5 mm (0.5 in)
1957
46.2 mm (1.8 in)
1958
27.4 mm (1.1 in)
1959
35.3 mm (1.4 in)
1960
15.0 mm (0.6 in)
1961
33.0 mm (1.3 in)
1962
23.1 mm (0.9 in)
1963
35.1 mm (1.4 in)
1964
60.2 mm (2.4 in)
1965
23.6 mm (0.9 in)
1966
21.1 mm (0.8 in)
1967
25.1 mm (1.0 in)
1968
28.4 mm (1.1 in)
1969
49.3 mm (1.9 in)
1970
35.6 mm (1.4 in)
1971
41.7 mm (1.6 in)
1972
32.0 mm (1.3 in)
1973
40.9 mm (1.6 in)
1974
19.6 mm (0.8 in)
1975
23.1 mm (0.9 in)
1976
38.1 mm (1.5 in)
1977
45.2 mm (1.8 in)
1978
61.2 mm (2.4 in)
1979
43.0 mm (1.7 in)
1980
27.6 mm (1.1 in)
1981
53.0 mm (2.1 in)
1982
43.0 mm (1.7 in)
1983
41.4 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Whitesand Dam, 1937 to 1983. The record is 88.8 mm (3.5 in) in 1979, marked on the chart; the median year is 46.0 mm (1.8 in).
Wettest five days (Rx5day) at Whitesand Dam by year
Year
Wettest five days (Rx5day)
1937
15.3 mm (0.6 in)
1938
31.5 mm (1.2 in)
1939
46.0 mm (1.8 in)
1940
37.8 mm (1.5 in)
1941
57.9 mm (2.3 in)
1942
41.7 mm (1.6 in)
1943
35.3 mm (1.4 in)
1944
46.0 mm (1.8 in)
1945
36.6 mm (1.4 in)
1946
33.8 mm (1.3 in)
1947
33.0 mm (1.3 in)
1948
47.5 mm (1.9 in)
1949
71.1 mm (2.8 in)
1950
49.6 mm (2.0 in)
1951
35.5 mm (1.4 in)
1952
45.5 mm (1.8 in)
1953
46.3 mm (1.8 in)
1954
56.1 mm (2.2 in)
1955
37.4 mm (1.5 in)
1956
29.5 mm (1.2 in)
1957
54.2 mm (2.1 in)
1958
43.5 mm (1.7 in)
1959
45.7 mm (1.8 in)
1960
34.3 mm (1.4 in)
1961
35.0 mm (1.4 in)
1962
40.4 mm (1.6 in)
1963
69.9 mm (2.8 in)
1964
73.4 mm (2.9 in)
1965
41.8 mm (1.6 in)
1966
35.3 mm (1.4 in)
1967
44.2 mm (1.7 in)
1968
44.9 mm (1.8 in)
1969
64.2 mm (2.5 in)
1970
81.6 mm (3.2 in)
1971
49.6 mm (2.0 in)
1972
52.3 mm (2.1 in)
1973
56.9 mm (2.2 in)
1974
34.8 mm (1.4 in)
1975
52.1 mm (2.1 in)
1976
84.6 mm (3.3 in)
1977
52.6 mm (2.1 in)
1978
86.8 mm (3.4 in)
1979
88.8 mm (3.5 in)
1980
59.8 mm (2.4 in)
1981
61.9 mm (2.4 in)
1982
79.0 mm (3.1 in)
1983
84.2 mm (3.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Whitesand Dam, 1937 to 1983. The record is 44 days in 1942, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Whitesand Dam by year
Year
Longest dry spell (CDD)
1937
6 days
1938
24 days
1939
13 days
1940
18 days
1941
19 days
1942
44 days
1943
22 days
1944
35 days
1945
27 days
1946
17 days
1947
20 days
1948
24 days
1949
23 days
1950
36 days
1951
17 days
1952
44 days
1953
23 days
1954
37 days
1955
15 days
1956
17 days
1957
19 days
1958
19 days
1959
14 days
1960
20 days
1961
23 days
1962
14 days
1963
36 days
1964
29 days
1965
19 days
1966
23 days
1967
14 days
1968
21 days
1969
19 days
1970
20 days
1971
19 days
1972
21 days
1973
26 days
1974
40 days
1975
28 days
1976
24 days
1977
27 days
1978
42 days
1979
38 days
1980
33 days
1981
33 days
1982
19 days
1983
13 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
42 years with a frost
Across 42 years with a frost, the median last spring frost at Whitesand Dam falls on 8 June and the median first autumn frost on 11 September, which leaves a median of 97 days between them.
Fitted over all years, the growing season changes by +8.4 days per decade at this station.
Frost dates and growing season at Whitesand Dam
Measure
Median, all years
Earliest period
Recent period (1951 to 1983)
Recent against earliest
Fitted trend
Last spring frost
8 June
n/a
4 June
n/a
-4.8 days per decade
First autumn frost
11 September
n/a
12 September
n/a
+3.6 days per decade
Growing days
97 days
n/a
100 days
n/a
+8.4 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
43 years, 1938 to 1983
A day with at least 31.8 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 67.4 mm (2.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Whitesand 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
31.8 mm (1.3 in)
5 years
42.7 mm (1.7 in)
10 years
49.3 mm (1.9 in)
25 years
57.1 mm (2.2 in)
50 years
62.4 mm (2.5 in)
Longer than the 43 years of record
100 years
67.4 mm (2.7 in)
Longer than the 43 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, 43 years of values from 1938 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: 61.2 mm (2.4 in) in 1978; 60.2 mm (2.4 in) in 1964; 53.0 mm (2.1 in) in 1981.
Download the Data
Data for Whitesand Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Whitesand 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.