Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Ormiston. 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 Ormiston, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
10.0 C (50.0 F)
-48.3 C (-54.9 F)
n/a
n/a
Feb
10.6 C (51.1 F)
-39.4 C (-38.9 F)
n/a
n/a
Mar
22.8 C (73.0 F)
-38.3 C (-36.9 F)
n/a
n/a
Apr
31.5 C (88.7 F)
-28.9 C (-20.0 F)
n/a
n/a
May
37.0 C (98.6 F)
-11.7 C (10.9 F)
n/a
n/a
Jun
36.1 C (97.0 F)
-5.0 C (23.0 F)
n/a
n/a
Jul
38.9 C (102.0 F)
2.8 C (37.0 F)
n/a
n/a
Aug
39.0 C (102.2 F)
0.6 C (33.1 F)
n/a
n/a
Sep
37.0 C (98.6 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-19.4 C (-2.9 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-35.0 C (-31.0 F)
n/a
n/a
Dec
13.0 C (55.4 F)
-43.5 C (-46.3 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ormiston still stand. 1968 holds the most, with 64.
Standing records at Ormiston by the year they were set
Year set
Standing records
1951
29
1952
51
1953
47
1954
58
1955
49
1956
42
1957
36
1958
47
1959
56
1960
32
1961
45
1962
42
1963
56
1964
42
1965
47
1966
47
1967
45
1968
64
1969
46
1970
35
1971
31
1972
54
1973
42
1974
41
1975
31
1976
34
1977
47
1978
33
1979
43
1980
43
1981
49
1982
38
1983
62
All-Time Record Progression
3 new records
3 all-time records were set at Ormiston between 12 May 1983 and 23 December 1983. Each dot is a new record.
When Ormiston set new all-time records
Date
Kind
Detail
1983-05-12
Record daily snowfall
Record daily snowfall 30.0 cm (11.8 in)
1983-08-06
Record high maximum temperature
Record high maximum temperature 39.0 C (102.2 F)
1983-12-23
Record low maximum temperature
Record low maximum temperature -33.0 C (-27.4 F)
Wettest Day of Each Month
Aug: 92.2 mm (3.6 in)
The wettest day on record for each calendar month at Ormiston. The most was 92.2 mm (3.6 in) on 13 August 1974.
Record daily precipitation for each month at Ormiston
Month
Record daily precipitation (mm)
Date
Jan
15.2 mm (0.6 in)
17 January 1954
Feb
16.5 mm (0.6 in)
14 February 1976
Mar
26.7 mm (1.1 in)
28 March 1967
Apr
28.7 mm (1.1 in)
19 April 1955
May
42.4 mm (1.7 in)
25 May 1972
Jun
53.3 mm (2.1 in)
23 June 1953
Jul
66.0 mm (2.6 in)
27 July 1955
Aug
92.2 mm (3.6 in)
13 August 1974
Sep
45.0 mm (1.8 in)
25 September 1959
Oct
28.7 mm (1.1 in)
18 October 1971
Nov
7.6 mm (0.30 in)
1 November 1955
Dec
15.2 mm (0.6 in)
26 December 1964
Period of Record Coverage
1951 to 1983
Complete yearUnder 90 percent of days
33 years of record at Ormiston, 1951 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1951.
Cooler than the station meanWarmer than the station mean
One stripe for each of 31 complete years at Ormiston, 1952 to 1983. Blue stripes are years cooler than the station's own mean of 3.2 C (37.8 F); red stripes are warmer. The coolest year was 1982, at 1.7 C (35.0 F), and the warmest was 1981, at 5.7 C (42.3 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Ormiston as warming stripes, 1952 to 1983
Year
Annual mean temperature
Difference from the station mean
1952
3.3 C
+0.10 C
1953
4.4 C
+1.18 C
1954
3.2 C
+0.00 C
1955
1.7 C
-1.56 C
1956
2.5 C
-0.70 C
1957
3.3 C
+0.07 C
1958
3.9 C
+0.68 C
1959
2.7 C
-0.56 C
1960
3.2 C
-0.03 C
1962
4.0 C
+0.79 C
1963
4.6 C
+1.32 C
1964
3.4 C
+0.18 C
1965
1.8 C
-1.43 C
1966
2.7 C
-0.53 C
1967
3.1 C
-0.09 C
1968
3.8 C
+0.61 C
1969
2.6 C
-0.60 C
1970
2.3 C
-0.97 C
1971
3.1 C
-0.17 C
1972
2.1 C
-1.13 C
1973
4.2 C
+0.96 C
1974
3.1 C
-0.13 C
1975
2.6 C
-0.59 C
1976
4.2 C
+0.92 C
1977
3.9 C
+0.71 C
1978
2.4 C
-0.81 C
1979
2.6 C
-0.62 C
1980
4.0 C
+0.77 C
1981
5.7 C
+2.48 C
1982
1.7 C
-1.58 C
1983
3.8 C
+0.59 C
The fitted trend in annual mean temperature here over 1952 to 1983 is 0.1 C (-0.3 to 0.4) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.5 to 0.8) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Ormiston
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.3 to 0.4) per decade
0.1 F (-0.5 to 0.8) per decade
1952 to 1983
31
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.5 to 0.3) per decade
-0.2 F (-0.9 to 0.6) per decade
1952 to 1983
31
Not clearly different from zero
Mean daily minimum
0.2 C (-0.1 to 0.6) per decade
0.4 F (-0.2 to 1.0) per decade
1952 to 1983
31
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
1951 to 1983
Yearly extremes at Ormiston: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.0 C (102.2 F)
1983
36.5 C (97.7 F)
33
Coldest night (TNn)
-48.3 C (-54.9 F)
1954
-37.2 C (-35.0 F)
33
Wettest day (Rx1day)
92.2 mm (3.6 in)
1974
31.0 mm (1.2 in)
33
Wettest five days (Rx5day)
135.2 mm (5.3 in)
1974
53.9 mm (2.1 in)
33
Longest dry spell (CDD)
95 days
1968
32 days
33
Hottest day (TXx)
The hottest day of the year at Ormiston, 1951 to 1983. The record is 39.0 C (102.2 F) in 1983, marked on the chart; the median year is 36.5 C (97.7 F).
Hottest day (TXx) at Ormiston by year
Year
Hottest day (TXx)
1951
37.8 C (100.0 F)
1952
36.7 C (98.1 F)
1953
32.2 C (90.0 F)
1954
32.8 C (91.0 F)
1955
33.9 C (93.0 F)
1956
36.1 C (97.0 F)
1957
36.1 C (97.0 F)
1958
37.2 C (99.0 F)
1959
36.7 C (98.1 F)
1960
38.9 C (102.0 F)
1961
36.7 C (98.1 F)
1962
32.8 C (91.0 F)
1963
37.2 C (99.0 F)
1964
35.6 C (96.1 F)
1965
37.2 C (99.0 F)
1966
35.6 C (96.1 F)
1967
35.6 C (96.1 F)
1968
37.2 C (99.0 F)
1969
37.8 C (100.0 F)
1970
37.2 C (99.0 F)
1971
37.8 C (100.0 F)
1972
37.2 C (99.0 F)
1973
36.1 C (97.0 F)
1974
35.6 C (96.1 F)
1975
38.3 C (100.9 F)
1976
36.1 C (97.0 F)
1977
33.3 C (91.9 F)
1978
36.0 C (96.8 F)
1979
36.5 C (97.7 F)
1980
37.0 C (98.6 F)
1981
36.0 C (96.8 F)
1982
32.5 C (90.5 F)
1983
39.0 C (102.2 F)
Coldest night (TNn)
The coldest night of the year at Ormiston, 1951 to 1983. The record is -48.3 C (-54.9 F) in 1954, marked on the chart; the median year is -37.2 C (-35.0 F).
Coldest night (TNn) at Ormiston by year
Year
Coldest night (TNn)
1951
-36.1 C (-33.0 F)
1952
-38.3 C (-36.9 F)
1953
-35.6 C (-32.1 F)
1954
-48.3 C (-54.9 F)
1955
-35.6 C (-32.1 F)
1956
-37.8 C (-36.0 F)
1957
-37.2 C (-35.0 F)
1958
-32.8 C (-27.0 F)
1959
-43.3 C (-45.9 F)
1960
-35.0 C (-31.0 F)
1961
-40.0 C (-40.0 F)
1962
-39.4 C (-38.9 F)
1963
-35.0 C (-31.0 F)
1964
-34.4 C (-29.9 F)
1965
-39.4 C (-38.9 F)
1966
-37.2 C (-35.0 F)
1967
-38.3 C (-36.9 F)
1968
-40.0 C (-40.0 F)
1969
-43.3 C (-45.9 F)
1970
-40.6 C (-41.1 F)
1971
-36.7 C (-34.1 F)
1972
-40.6 C (-41.1 F)
1973
-33.3 C (-27.9 F)
1974
-39.4 C (-38.9 F)
1975
-33.9 C (-29.0 F)
1976
-37.2 C (-35.0 F)
1977
-39.4 C (-38.9 F)
1978
-35.6 C (-32.1 F)
1979
-35.0 C (-31.0 F)
1980
-34.0 C (-29.2 F)
1981
-32.5 C (-26.5 F)
1982
-39.5 C (-39.1 F)
1983
-43.5 C (-46.3 F)
Wettest day (Rx1day)
The wettest day of the year at Ormiston, 1951 to 1983. The record is 92.2 mm (3.6 in) in 1974, marked on the chart; the median year is 31.0 mm (1.2 in).
Wettest day (Rx1day) at Ormiston by year
Year
Wettest day (Rx1day)
1951
25.4 mm (1.0 in)
1952
30.5 mm (1.2 in)
1953
53.3 mm (2.1 in)
1954
31.2 mm (1.2 in)
1955
66.0 mm (2.6 in)
1956
22.9 mm (0.9 in)
1957
17.3 mm (0.7 in)
1958
30.5 mm (1.2 in)
1959
45.0 mm (1.8 in)
1960
39.4 mm (1.6 in)
1961
21.6 mm (0.9 in)
1962
31.0 mm (1.2 in)
1963
53.8 mm (2.1 in)
1964
24.6 mm (1.0 in)
1965
40.6 mm (1.6 in)
1966
37.6 mm (1.5 in)
1967
26.7 mm (1.1 in)
1968
22.9 mm (0.9 in)
1969
29.7 mm (1.2 in)
1970
20.3 mm (0.8 in)
1971
28.7 mm (1.1 in)
1972
42.4 mm (1.7 in)
1973
31.8 mm (1.3 in)
1974
92.2 mm (3.6 in)
1975
30.2 mm (1.2 in)
1976
22.9 mm (0.9 in)
1977
45.2 mm (1.8 in)
1978
39.0 mm (1.5 in)
1979
24.0 mm (0.9 in)
1980
26.4 mm (1.0 in)
1981
31.0 mm (1.2 in)
1982
45.0 mm (1.8 in)
1983
40.8 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ormiston, 1951 to 1983. The record is 135.2 mm (5.3 in) in 1974, marked on the chart; the median year is 53.9 mm (2.1 in).
Wettest five days (Rx5day) at Ormiston by year
Year
Wettest five days (Rx5day)
1951
49.0 mm (1.9 in)
1952
43.4 mm (1.7 in)
1953
71.7 mm (2.8 in)
1954
73.4 mm (2.9 in)
1955
81.6 mm (3.2 in)
1956
41.2 mm (1.6 in)
1957
25.7 mm (1.0 in)
1958
32.8 mm (1.3 in)
1959
67.3 mm (2.6 in)
1960
70.7 mm (2.8 in)
1961
22.6 mm (0.9 in)
1962
68.1 mm (2.7 in)
1963
87.1 mm (3.4 in)
1964
39.8 mm (1.6 in)
1965
60.4 mm (2.4 in)
1966
63.0 mm (2.5 in)
1967
64.4 mm (2.5 in)
1968
48.4 mm (1.9 in)
1969
53.9 mm (2.1 in)
1970
38.1 mm (1.5 in)
1971
35.3 mm (1.4 in)
1972
56.2 mm (2.2 in)
1973
50.6 mm (2.0 in)
1974
135.2 mm (5.3 in)
1975
50.9 mm (2.0 in)
1976
47.3 mm (1.9 in)
1977
58.2 mm (2.3 in)
1978
63.9 mm (2.5 in)
1979
28.8 mm (1.1 in)
1980
30.4 mm (1.2 in)
1981
45.9 mm (1.8 in)
1982
64.6 mm (2.5 in)
1983
61.4 mm (2.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Ormiston, 1951 to 1983. The record is 95 days in 1968, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Ormiston by year
Year
Longest dry spell (CDD)
1951
23 days
1952
30 days
1953
33 days
1954
32 days
1955
25 days
1956
24 days
1957
63 days
1958
43 days
1959
29 days
1960
66 days
1961
37 days
1962
28 days
1963
46 days
1964
48 days
1965
26 days
1966
38 days
1967
27 days
1968
95 days
1969
44 days
1970
23 days
1971
39 days
1972
27 days
1973
29 days
1974
28 days
1975
37 days
1976
39 days
1977
49 days
1978
35 days
1979
23 days
1980
38 days
1981
28 days
1982
30 days
1983
28 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
31 years with a frost
Across 31 years with a frost, the median last spring frost at Ormiston falls on 20 May and the median first autumn frost on 15 September, which leaves a median of 119 days between them.
Fitted over all years, the growing season changes by +1.4 days per decade at this station.
Frost dates and growing season at Ormiston
Measure
Median, all years
Earliest period
Recent period (1953 to 1983)
Recent against earliest
Fitted trend
Last spring frost
20 May
n/a
20 May
n/a
-2.1 days per decade
First autumn frost
15 September
n/a
15 September
n/a
-0.7 days per decade
Growing days
119 days
n/a
120 days
n/a
+1.4 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.
Download the Data
Data for Ormiston standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ormiston 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.