Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Alliance. 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 Alliance, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
9.4 C (48.9 F)
-49.4 C (-56.9 F)
n/a
n/a
Feb
12.8 C (55.0 F)
-48.9 C (-56.0 F)
n/a
n/a
Mar
20.6 C (69.1 F)
-38.9 C (-38.0 F)
n/a
n/a
Apr
30.0 C (86.0 F)
-31.7 C (-25.1 F)
n/a
n/a
May
32.2 C (90.0 F)
-13.3 C (8.1 F)
n/a
n/a
Jun
36.7 C (98.1 F)
-5.0 C (23.0 F)
n/a
n/a
Jul
37.2 C (99.0 F)
-5.6 C (21.9 F)
n/a
n/a
Aug
36.7 C (98.1 F)
-1.7 C (28.9 F)
n/a
n/a
Sep
35.5 C (95.9 F)
-8.3 C (17.1 F)
n/a
n/a
Oct
28.3 C (82.9 F)
-28.3 C (-18.9 F)
n/a
n/a
Nov
22.8 C (73.0 F)
-39.4 C (-38.9 F)
n/a
n/a
Dec
12.2 C (54.0 F)
-45.6 C (-50.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Alliance still stand. 1919 holds the most, with 96.
Standing records at Alliance by the year they were set
Year set
Standing records
1916
24
1917
66
1918
69
1919
96
1920
33
1921
71
1922
41
1923
46
1924
37
1925
22
1926
21
1954
60
1955
37
1956
42
1957
40
1958
29
1959
44
1960
28
1961
21
1962
13
1963
36
1964
26
1965
50
1966
25
1967
23
1968
47
1969
25
1970
26
1971
22
1972
31
1973
24
1974
17
1975
22
1976
44
1977
42
1978
32
1979
35
1980
31
1981
51
1982
15
All-Time Record Progression
1 new records
1 all-time records were set at Alliance between 14 January 1980 and 14 January 1980. Each dot is a new record.
When Alliance set new all-time records
Date
Kind
Detail
1980-01-14
Record daily snowfall
Record daily snowfall 33.0 cm (13.0 in)
Wettest Day of Each Month
Jul: 83.6 mm (3.3 in)
The wettest day on record for each calendar month at Alliance. The most was 83.6 mm (3.3 in) on 14 July 1962.
Record daily precipitation for each month at Alliance
Month
Record daily precipitation (mm)
Date
Jan
33.0 mm (1.3 in)
14 January 1980
Feb
30.5 mm (1.2 in)
12 February 1956
Mar
25.4 mm (1.0 in)
5 March 1926
Apr
25.4 mm (1.0 in)
13 April 1973
May
67.1 mm (2.6 in)
10 May 1977
Jun
79.2 mm (3.1 in)
21 June 1963
Jul
83.6 mm (3.3 in)
14 July 1962
Aug
44.7 mm (1.8 in)
5 August 1966
Sep
50.1 mm (2.0 in)
7 September 1978
Oct
22.4 mm (0.9 in)
17 October 1979
Nov
20.3 mm (0.8 in)
15 November 1969
Dec
30.5 mm (1.2 in)
29 December 1918
Period of Record Coverage
1916 to 1982
Complete yearUnder 90 percent of days
40 years of record at Alliance, 1916 to 1982. 5 years have data for under 90 percent of days and are left out of rankings: 1916, 1926, 1961, 1962, 1982.
Cooler than the station meanWarmer than the station mean
One stripe for each of 30 complete years at Alliance, 1917 to 1981. Blue stripes are years cooler than the station's own mean of 2.3 C (36.1 F); red stripes are warmer. The coolest year was 1917, at 0.6 C (33.0 F), and the warmest was 1981, at 5.5 C (41.9 F). The strongest colour marks a difference of 3.3 C (5.9 F).
Annual mean temperature at Alliance as warming stripes, 1917 to 1981
Year
Annual mean temperature
Difference from the station mean
1917
0.6 C
-1.74 C
1918
2.0 C
-0.28 C
1919
1.2 C
-1.07 C
1920
1.8 C
-0.47 C
1921
1.7 C
-0.62 C
1922
1.0 C
-1.29 C
1923
2.9 C
+0.57 C
1924
2.5 C
+0.24 C
1925
2.5 C
+0.22 C
1954
2.1 C
-0.16 C
1957
3.0 C
+0.74 C
1959
2.8 C
+0.45 C
1963
3.5 C
+1.19 C
1964
2.4 C
+0.05 C
1965
0.9 C
-1.41 C
1966
1.5 C
-0.76 C
1967
2.3 C
+0.03 C
1968
3.0 C
+0.70 C
1969
1.6 C
-0.69 C
1970
1.8 C
-0.50 C
1971
2.1 C
-0.23 C
1972
1.2 C
-1.07 C
1973
2.6 C
+0.34 C
1974
2.5 C
+0.20 C
1975
1.6 C
-0.73 C
1976
4.3 C
+2.02 C
1978
2.5 C
+0.20 C
1979
2.5 C
+0.17 C
1980
3.0 C
+0.69 C
1981
5.5 C
+3.20 C
The annual mean temperature here has risen by 0.17 C (0.02 to 0.32) per decade over 1917 to 1981. In Fahrenheit: 0.30 F (0.03 to 0.58) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Alliance
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.17 C (0.02 to 0.32) per decade
0.30 F (0.03 to 0.58) per decade
1917 to 1981
30
Rise
Mean daily maximum
-0.1 C (-0.2 to 0.1) per decade
-0.1 F (-0.4 to 0.2) per decade
1917 to 1981
30
Not clearly different from zero
Mean daily minimum
0.4 C (0.2 to 0.6) per decade
0.7 F (0.4 to 1.0) per decade
1917 to 1981
30
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
1916 to 1982
Yearly extremes at Alliance: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.2 C (99.0 F)
1921
33.6 C (92.5 F)
40
Coldest night (TNn)
-49.4 C (-56.9 F)
1922
-38.3 C (-36.9 F)
40
Wettest day (Rx1day)
83.6 mm (3.3 in)
1962
34.1 mm (1.3 in)
40
Wettest five days (Rx5day)
164.8 mm (6.5 in)
1962
57.2 mm (2.3 in)
40
Longest dry spell (CDD)
62 days
1922
30 days
40
Hottest day (TXx)
The hottest day of the year at Alliance, 1916 to 1982. The record is 37.2 C (99.0 F) in 1921, marked on the chart; the median year is 33.6 C (92.5 F).
Hottest day (TXx) at Alliance by year
Year
Hottest day (TXx)
1916
30.6 C (87.1 F)
1917
34.4 C (93.9 F)
1918
36.7 C (98.1 F)
1919
36.7 C (98.1 F)
1920
36.1 C (97.0 F)
1921
37.2 C (99.0 F)
1922
36.7 C (98.1 F)
1923
30.6 C (87.1 F)
1924
36.7 C (98.1 F)
1925
32.2 C (90.0 F)
1926
33.3 C (91.9 F)
1954
33.3 C (91.9 F)
1955
30.0 C (86.0 F)
1956
32.2 C (90.0 F)
1957
32.8 C (91.0 F)
1958
33.9 C (93.0 F)
1959
33.9 C (93.0 F)
1960
34.4 C (93.9 F)
1961
33.3 C (91.9 F)
1962
32.2 C (90.0 F)
1963
31.1 C (88.0 F)
1964
35.6 C (96.1 F)
1965
34.4 C (93.9 F)
1966
31.7 C (89.1 F)
1967
34.4 C (93.9 F)
1968
32.8 C (91.0 F)
1969
33.9 C (93.0 F)
1970
34.4 C (93.9 F)
1971
35.0 C (95.0 F)
1972
32.2 C (90.0 F)
1973
31.1 C (88.0 F)
1974
32.2 C (90.0 F)
1975
33.9 C (93.0 F)
1976
31.7 C (89.1 F)
1977
33.9 C (93.0 F)
1978
34.0 C (93.2 F)
1979
31.5 C (88.7 F)
1980
30.5 C (86.9 F)
1981
35.5 C (95.9 F)
1982
31.5 C (88.7 F)
Coldest night (TNn)
The coldest night of the year at Alliance, 1916 to 1982. The record is -49.4 C (-56.9 F) in 1922, marked on the chart; the median year is -38.3 C (-36.9 F).
Coldest night (TNn) at Alliance by year
Year
Coldest night (TNn)
1916
-43.9 C (-47.0 F)
1917
-48.9 C (-56.0 F)
1918
-45.0 C (-49.0 F)
1919
-41.1 C (-42.0 F)
1920
-46.1 C (-51.0 F)
1921
-43.9 C (-47.0 F)
1922
-49.4 C (-56.9 F)
1923
-39.4 C (-38.9 F)
1924
-45.6 C (-50.1 F)
1925
-32.8 C (-27.0 F)
1926
-30.0 C (-22.0 F)
1954
-41.1 C (-42.0 F)
1955
-35.6 C (-32.1 F)
1956
-38.3 C (-36.9 F)
1957
-33.9 C (-29.0 F)
1958
-35.0 C (-31.0 F)
1959
-38.3 C (-36.9 F)
1960
-35.0 C (-31.0 F)
1961
-22.2 C (-8.0 F)
1962
-24.4 C (-11.9 F)
1963
-36.7 C (-34.1 F)
1964
-37.2 C (-35.0 F)
1965
-36.1 C (-33.0 F)
1966
-38.9 C (-38.0 F)
1967
-35.6 C (-32.1 F)
1968
-37.2 C (-35.0 F)
1969
-42.8 C (-45.0 F)
1970
-39.4 C (-38.9 F)
1971
-37.2 C (-35.0 F)
1972
-43.9 C (-47.0 F)
1973
-33.9 C (-29.0 F)
1974
-38.9 C (-38.0 F)
1975
-36.7 C (-34.1 F)
1976
-40.0 C (-40.0 F)
1977
-43.3 C (-45.9 F)
1978
-35.0 C (-31.0 F)
1979
-38.5 C (-37.3 F)
1980
-35.0 C (-31.0 F)
1981
-31.5 C (-24.7 F)
1982
-39.0 C (-38.2 F)
Wettest day (Rx1day)
The wettest day of the year at Alliance, 1916 to 1982. The record is 83.6 mm (3.3 in) in 1962, marked on the chart; the median year is 34.1 mm (1.3 in).
Wettest day (Rx1day) at Alliance by year
Year
Wettest day (Rx1day)
1916
47.0 mm (1.9 in)
1917
24.6 mm (1.0 in)
1918
30.5 mm (1.2 in)
1919
48.3 mm (1.9 in)
1920
52.6 mm (2.1 in)
1921
22.9 mm (0.9 in)
1922
35.1 mm (1.4 in)
1923
25.7 mm (1.0 in)
1924
29.7 mm (1.2 in)
1925
32.5 mm (1.3 in)
1926
34.3 mm (1.4 in)
1954
37.8 mm (1.5 in)
1955
29.2 mm (1.1 in)
1956
31.8 mm (1.3 in)
1957
24.4 mm (1.0 in)
1958
25.4 mm (1.0 in)
1959
35.6 mm (1.4 in)
1960
45.5 mm (1.8 in)
1961
14.5 mm (0.6 in)
1962
83.6 mm (3.3 in)
1963
79.2 mm (3.1 in)
1964
29.7 mm (1.2 in)
1965
23.9 mm (0.9 in)
1966
44.7 mm (1.8 in)
1967
34.5 mm (1.4 in)
1968
33.8 mm (1.3 in)
1969
26.2 mm (1.0 in)
1970
35.1 mm (1.4 in)
1971
53.6 mm (2.1 in)
1972
26.9 mm (1.1 in)
1973
73.7 mm (2.9 in)
1974
35.1 mm (1.4 in)
1975
82.6 mm (3.3 in)
1976
30.5 mm (1.2 in)
1977
67.1 mm (2.6 in)
1978
50.1 mm (2.0 in)
1979
38.1 mm (1.5 in)
1980
33.0 mm (1.3 in)
1981
31.0 mm (1.2 in)
1982
31.4 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Alliance, 1916 to 1982. The record is 164.8 mm (6.5 in) in 1962, marked on the chart; the median year is 57.2 mm (2.3 in).
Wettest five days (Rx5day) at Alliance by year
Year
Wettest five days (Rx5day)
1916
84.4 mm (3.3 in)
1917
30.4 mm (1.2 in)
1918
34.6 mm (1.4 in)
1919
51.3 mm (2.0 in)
1920
71.4 mm (2.8 in)
1921
48.5 mm (1.9 in)
1922
40.4 mm (1.6 in)
1923
41.6 mm (1.6 in)
1924
37.1 mm (1.5 in)
1925
54.4 mm (2.1 in)
1926
56.4 mm (2.2 in)
1954
61.9 mm (2.4 in)
1955
53.1 mm (2.1 in)
1956
61.5 mm (2.4 in)
1957
38.2 mm (1.5 in)
1958
31.4 mm (1.2 in)
1959
71.1 mm (2.8 in)
1960
67.3 mm (2.6 in)
1961
22.4 mm (0.9 in)
1962
164.8 mm (6.5 in)
1963
110.7 mm (4.4 in)
1964
73.6 mm (2.9 in)
1965
36.6 mm (1.4 in)
1966
71.6 mm (2.8 in)
1967
58.9 mm (2.3 in)
1968
73.5 mm (2.9 in)
1969
54.6 mm (2.1 in)
1970
87.0 mm (3.4 in)
1971
57.9 mm (2.3 in)
1972
42.1 mm (1.7 in)
1973
138.0 mm (5.4 in)
1974
49.3 mm (1.9 in)
1975
86.5 mm (3.4 in)
1976
31.8 mm (1.3 in)
1977
72.9 mm (2.9 in)
1978
77.0 mm (3.0 in)
1979
45.1 mm (1.8 in)
1980
68.2 mm (2.7 in)
1981
42.3 mm (1.7 in)
1982
62.7 mm (2.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Alliance, 1916 to 1982. The record is 62 days in 1922, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Alliance by year
Year
Longest dry spell (CDD)
1916
30 days
1917
40 days
1918
56 days
1919
30 days
1920
23 days
1921
54 days
1922
62 days
1923
41 days
1924
30 days
1925
33 days
1926
43 days
1954
39 days
1955
31 days
1956
21 days
1957
29 days
1958
29 days
1959
31 days
1960
23 days
1961
14 days
1962
24 days
1963
18 days
1964
19 days
1965
39 days
1966
32 days
1967
40 days
1968
38 days
1969
22 days
1970
15 days
1971
27 days
1972
20 days
1973
25 days
1974
34 days
1975
24 days
1976
50 days
1977
44 days
1978
14 days
1979
21 days
1980
24 days
1981
28 days
1982
12 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
30 years with a frost
Across 30 years with a frost, the median last spring frost at Alliance falls on 31 May and the median first autumn frost on 9 September, which leaves a median of 108 days between them.
Fitted over all years, the growing season changes by +7.2 days per decade at this station.
Frost dates and growing season at Alliance
Measure
Median, all years
Earliest period
Recent period (1917 to 1981)
Recent against earliest
Fitted trend
Last spring frost
31 May
n/a
31 May
n/a
-3.5 days per decade
First autumn frost
9 September
n/a
9 September
n/a
+3.7 days per decade
Growing days
108 days
n/a
108 days
n/a
+7.2 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
35 years, 1917 to 1981
A day with at least 34.1 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 110.1 mm (4.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Alliance: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
34.1 mm (1.3 in)
5 years
46.4 mm (1.8 in)
10 years
57.1 mm (2.2 in)
25 years
74.3 mm (2.9 in)
50 years
90.5 mm (3.6 in)
Longer than the 35 years of record
100 years
110.1 mm (4.3 in)
Longer than the 35 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, 35 years of values from 1917 to 1981.
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: 82.6 mm (3.3 in) in 1975; 79.2 mm (3.1 in) in 1963; 73.7 mm (2.9 in) in 1973.
Download the Data
Data for Alliance standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Alliance 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.