Record envelope, standing records and threshold days for Canyon Ferry (USC00241460), Montana, United States, with 56 years of record.
Key Facts for Canyon Ferry
Canyon Ferry (USC00241460) is a weather station in Montana, United States at 46.63 latitude and -111.70 longitude, 1,058 m (3,471 ft) above sea level.
The station reports from 1898 to 1953, 56 years of record.
1,464 records set at Canyon Ferry still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Canyon Ferry set a daily record high maximum temperature of 17.8 C (64.0 F) on 26 February 1950.
About the Station
Location: Montana, United States, 46.63 latitude, -111.70 longitude.
Elevation: 1,058 m (3,471 ft).
Period of record: 1898 to 1953, 56 years.
Eligible elements: tmax, tmin, prcp, snow.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Canyon Ferry. 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 Canyon Ferry, 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)
-39.4 C (-38.9 F)
n/a
n/a
Feb
20.6 C (69.1 F)
-40.0 C (-40.0 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-32.8 C (-27.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-20.0 C (-4.0 F)
n/a
n/a
May
38.9 C (102.0 F)
-6.7 C (19.9 F)
n/a
n/a
Jun
39.4 C (102.9 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
2.8 C (37.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-10.0 C (14.0 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-15.0 C (5.0 F)
n/a
n/a
Nov
21.1 C (70.0 F)
-30.6 C (-23.1 F)
n/a
n/a
Dec
16.7 C (62.1 F)
-40.6 C (-41.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Canyon Ferry still stand. 1919 holds the most, with 66.
Standing records at Canyon Ferry by the year they were set
Year set
Standing records
1898
1
1899
39
1900
47
1901
27
1902
15
1903
30
1904
22
1905
35
1906
34
1907
23
1908
27
1909
27
1910
48
1911
28
1912
22
1913
30
1914
19
1915
12
1916
39
1917
23
1918
48
1919
66
1920
18
1921
42
1922
24
1923
24
1924
38
1925
33
1926
23
1927
20
1928
16
1929
29
1930
23
1931
31
1932
48
1933
29
1934
30
1935
33
1936
61
1937
27
1938
7
1939
37
1940
28
1941
14
1942
21
1943
24
1944
12
1945
17
1946
23
1947
16
1948
17
1949
27
1950
10
All-Time Record Progression
2 new records
2 all-time records were set at Canyon Ferry between 28 January 1929 and 16 July 1935. Each dot is a new record.
When Canyon Ferry set new all-time records
Date
Kind
Detail
1929-01-28
Record low maximum temperature
Record low maximum temperature -31.1 C (-24.0 F)
1935-07-16
Record high minimum temperature
Record high minimum temperature 21.7 C (71.1 F)
Wettest Day of Each Month
May: 92.7 mm (3.6 in)
The wettest day on record for each calendar month at Canyon Ferry. The most was 92.7 mm (3.6 in) on 12 May 1900.
Record daily precipitation for each month at Canyon Ferry
Month
Record daily precipitation (mm)
Date
Jan
15.2 mm (0.6 in)
19 January 1906
Feb
22.9 mm (0.9 in)
11 February 1919
Mar
11.7 mm (0.5 in)
23 March 1907
Apr
31.2 mm (1.2 in)
23 April 1925
May
92.7 mm (3.6 in)
12 May 1900
Jun
63.5 mm (2.5 in)
5 June 1908
Jul
43.7 mm (1.7 in)
4 July 1927
Aug
43.7 mm (1.7 in)
21 August 1933
Sep
33.8 mm (1.3 in)
3 September 1901
Oct
25.4 mm (1.0 in)
13 October 1920
Nov
28.4 mm (1.1 in)
6 November 1929
Dec
16.5 mm (0.6 in)
19 December 1925
Period of Record Coverage
1898 to 1953
Complete yearUnder 90 percent of days
54 years of record at Canyon Ferry, 1898 to 1953. 3 years have data for under 90 percent of days and are left out of rankings: 1898, 1950, 1953.
Cooler than the station meanWarmer than the station mean
One stripe for each of 49 complete years at Canyon Ferry, 1899 to 1949. Blue stripes are years cooler than the station's own mean of 6.5 C (43.7 F); red stripes are warmer. The coolest year was 1930, at 4.3 C (39.7 F), and the warmest was 1934, at 9.1 C (48.3 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Canyon Ferry as warming stripes, 1899 to 1949
Year
Annual mean temperature
Difference from the station mean
1899
5.7 C
-0.76 C
1901
7.7 C
+1.21 C
1902
6.9 C
+0.41 C
1903
6.2 C
-0.32 C
1904
7.1 C
+0.58 C
1905
6.2 C
-0.26 C
1906
6.7 C
+0.25 C
1907
5.9 C
-0.61 C
1908
6.7 C
+0.23 C
1909
5.7 C
-0.76 C
1910
7.2 C
+0.73 C
1911
5.4 C
-1.07 C
1912
6.2 C
-0.26 C
1913
6.2 C
-0.26 C
1914
7.5 C
+1.02 C
1915
8.1 C
+1.64 C
1916
4.7 C
-1.78 C
1917
5.7 C
-0.74 C
1918
6.9 C
+0.42 C
1919
6.0 C
-0.49 C
1921
7.5 C
+1.02 C
1922
5.9 C
-0.54 C
1923
7.3 C
+0.79 C
1924
6.7 C
+0.23 C
1925
8.1 C
+1.64 C
1926
7.4 C
+0.95 C
1927
6.2 C
-0.24 C
1928
4.8 C
-1.65 C
1929
4.4 C
-2.12 C
1930
4.3 C
-2.20 C
1931
6.0 C
-0.46 C
1932
7.1 C
+0.62 C
1933
7.6 C
+1.16 C
1934
9.1 C
+2.58 C
1935
6.8 C
+0.28 C
1936
6.9 C
+0.39 C
1937
6.1 C
-0.39 C
1938
6.3 C
-0.19 C
1939
6.9 C
+0.45 C
1940
7.3 C
+0.78 C
1941
7.0 C
+0.55 C
1942
5.2 C
-1.24 C
1943
5.4 C
-1.10 C
1944
6.1 C
-0.40 C
1945
6.9 C
+0.37 C
1946
7.3 C
+0.83 C
1947
6.6 C
+0.08 C
1948
5.8 C
-0.69 C
1949
5.9 C
-0.62 C
The fitted trend in annual mean temperature here over 1899 to 1949 is -0.02 C (-0.21 to 0.18) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.03 F (-0.38 to 0.32) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Canyon Ferry
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.02 C (-0.21 to 0.18) per decade
-0.03 F (-0.38 to 0.32) per decade
1899 to 1949
49
Not clearly different from zero
Mean daily maximum
0.01 C (-0.21 to 0.22) per decade
0.01 F (-0.38 to 0.40) per decade
1899 to 1949
49
Not clearly different from zero
Mean daily minimum
-0.04 C (-0.24 to 0.15) per decade
-0.1 F (-0.4 to 0.3) per decade
1899 to 1949
49
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
1898 to 1953
Yearly extremes at Canyon Ferry: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1901
35.6 C (96.1 F)
54
Coldest night (TNn)
-40.6 C (-41.1 F)
1927
-32.2 C (-26.0 F)
54
Wettest day (Rx1day)
92.7 mm (3.6 in)
1900
25.4 mm (1.0 in)
53
Wettest five days (Rx5day)
114.2 mm (4.5 in)
1900
38.5 mm (1.5 in)
52
Longest dry spell (CDD)
64 days
1921
36 days
53
Hottest day (TXx)
The hottest day of the year at Canyon Ferry, 1898 to 1953. The record is 40.0 C (104.0 F) in 1901, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Canyon Ferry by year
Year
Hottest day (TXx)
1898
13.3 C (55.9 F)
1899
35.6 C (96.1 F)
1900
39.4 C (102.9 F)
1901
40.0 C (104.0 F)
1902
35.0 C (95.0 F)
1903
35.6 C (96.1 F)
1904
35.6 C (96.1 F)
1905
35.0 C (95.0 F)
1906
35.6 C (96.1 F)
1907
32.2 C (90.0 F)
1908
37.8 C (100.0 F)
1909
36.1 C (97.0 F)
1910
36.7 C (98.1 F)
1911
33.3 C (91.9 F)
1912
35.6 C (96.1 F)
1913
33.9 C (93.0 F)
1914
35.6 C (96.1 F)
1915
34.4 C (93.9 F)
1916
33.9 C (93.0 F)
1917
36.7 C (98.1 F)
1918
36.1 C (97.0 F)
1919
38.3 C (100.9 F)
1920
36.7 C (98.1 F)
1921
38.3 C (100.9 F)
1922
35.0 C (95.0 F)
1923
36.7 C (98.1 F)
1924
37.8 C (100.0 F)
1925
36.7 C (98.1 F)
1926
36.7 C (98.1 F)
1927
34.4 C (93.9 F)
1928
36.7 C (98.1 F)
1929
38.3 C (100.9 F)
1930
34.4 C (93.9 F)
1931
37.8 C (100.0 F)
1932
35.6 C (96.1 F)
1933
38.9 C (102.0 F)
1934
38.3 C (100.9 F)
1935
39.4 C (102.9 F)
1936
40.0 C (104.0 F)
1937
40.0 C (104.0 F)
1938
34.4 C (93.9 F)
1939
34.4 C (93.9 F)
1940
35.6 C (96.1 F)
1941
36.1 C (97.0 F)
1942
33.3 C (91.9 F)
1943
33.3 C (91.9 F)
1944
31.7 C (89.1 F)
1945
33.3 C (91.9 F)
1946
35.0 C (95.0 F)
1947
33.3 C (91.9 F)
1948
34.4 C (93.9 F)
1949
36.1 C (97.0 F)
1950
17.8 C (64.0 F)
1953
15.6 C (60.1 F)
Coldest night (TNn)
The coldest night of the year at Canyon Ferry, 1898 to 1953. The record is -40.6 C (-41.1 F) in 1927, marked on the chart; the median year is -32.2 C (-26.0 F).
Coldest night (TNn) at Canyon Ferry by year
Year
Coldest night (TNn)
1898
-26.1 C (-15.0 F)
1899
-36.7 C (-34.1 F)
1900
-31.7 C (-25.1 F)
1901
-25.0 C (-13.0 F)
1902
-28.3 C (-18.9 F)
1903
-30.6 C (-23.1 F)
1904
-26.1 C (-15.0 F)
1905
-36.1 C (-33.0 F)
1906
-31.7 C (-25.1 F)
1907
-32.2 C (-26.0 F)
1908
-27.8 C (-18.0 F)
1909
-37.8 C (-36.0 F)
1910
-36.7 C (-34.1 F)
1911
-31.7 C (-25.1 F)
1912
-29.4 C (-20.9 F)
1913
-30.0 C (-22.0 F)
1914
-32.2 C (-26.0 F)
1915
-25.6 C (-14.1 F)
1916
-39.4 C (-38.9 F)
1917
-31.1 C (-24.0 F)
1918
-33.9 C (-29.0 F)
1919
-38.9 C (-38.0 F)
1920
-29.4 C (-20.9 F)
1921
-27.8 C (-18.0 F)
1922
-33.3 C (-27.9 F)
1923
-33.3 C (-27.9 F)
1924
-36.1 C (-33.0 F)
1925
-20.0 C (-4.0 F)
1926
-27.2 C (-17.0 F)
1927
-40.6 C (-41.1 F)
1928
-32.2 C (-26.0 F)
1929
-37.2 C (-35.0 F)
1930
-36.7 C (-34.1 F)
1931
-24.4 C (-11.9 F)
1932
-32.8 C (-27.0 F)
1933
-37.8 C (-36.0 F)
1934
-23.9 C (-11.0 F)
1935
-35.0 C (-31.0 F)
1936
-40.0 C (-40.0 F)
1937
-38.3 C (-36.9 F)
1938
-33.9 C (-29.0 F)
1939
-36.7 C (-34.1 F)
1940
-32.8 C (-27.0 F)
1941
-26.7 C (-16.1 F)
1942
-38.3 C (-36.9 F)
1943
-36.1 C (-33.0 F)
1944
-32.8 C (-27.0 F)
1945
-27.2 C (-17.0 F)
1946
-27.8 C (-18.0 F)
1947
-27.2 C (-17.0 F)
1948
-31.1 C (-24.0 F)
1949
-36.1 C (-33.0 F)
1950
-35.6 C (-32.1 F)
1953
-1.7 C (28.9 F)
Wettest day (Rx1day)
The wettest day of the year at Canyon Ferry, 1898 to 1953. The record is 92.7 mm (3.6 in) in 1900, marked on the chart; the median year is 25.4 mm (1.0 in).
Wettest day (Rx1day) at Canyon Ferry by year
Year
Wettest day (Rx1day)
1898
n/a
1899
15.2 mm (0.6 in)
1900
92.7 mm (3.6 in)
1901
33.8 mm (1.3 in)
1902
45.0 mm (1.8 in)
1903
25.4 mm (1.0 in)
1904
17.5 mm (0.7 in)
1905
22.9 mm (0.9 in)
1906
33.5 mm (1.3 in)
1907
48.3 mm (1.9 in)
1908
63.5 mm (2.5 in)
1909
24.9 mm (1.0 in)
1910
39.4 mm (1.6 in)
1911
26.9 mm (1.1 in)
1912
20.6 mm (0.8 in)
1913
37.6 mm (1.5 in)
1914
27.7 mm (1.1 in)
1915
38.1 mm (1.5 in)
1916
23.9 mm (0.9 in)
1917
29.0 mm (1.1 in)
1918
18.0 mm (0.7 in)
1919
22.9 mm (0.9 in)
1920
25.4 mm (1.0 in)
1921
23.1 mm (0.9 in)
1922
31.8 mm (1.3 in)
1923
39.4 mm (1.6 in)
1924
15.0 mm (0.6 in)
1925
31.2 mm (1.2 in)
1926
24.6 mm (1.0 in)
1927
43.7 mm (1.7 in)
1928
15.2 mm (0.6 in)
1929
28.4 mm (1.1 in)
1930
20.3 mm (0.8 in)
1931
16.8 mm (0.7 in)
1932
28.2 mm (1.1 in)
1933
43.7 mm (1.7 in)
1934
16.0 mm (0.6 in)
1935
10.7 mm (0.4 in)
1936
19.6 mm (0.8 in)
1937
32.3 mm (1.3 in)
1938
22.4 mm (0.9 in)
1939
16.0 mm (0.6 in)
1940
20.3 mm (0.8 in)
1941
27.4 mm (1.1 in)
1942
22.4 mm (0.9 in)
1943
25.9 mm (1.0 in)
1944
23.6 mm (0.9 in)
1945
30.2 mm (1.2 in)
1946
24.1 mm (0.9 in)
1947
41.9 mm (1.6 in)
1948
50.8 mm (2.0 in)
1949
16.5 mm (0.6 in)
1950
10.2 mm (0.4 in)
1953
0.0 mm (0.00 in)
Wettest five days (Rx5day)
The wettest five days of the year at Canyon Ferry, 1898 to 1953. The record is 114.2 mm (4.5 in) in 1900, marked on the chart; the median year is 38.5 mm (1.5 in).
Wettest five days (Rx5day) at Canyon Ferry by year
Year
Wettest five days (Rx5day)
1898
n/a
1899
25.7 mm (1.0 in)
1900
114.2 mm (4.5 in)
1901
43.2 mm (1.7 in)
1902
64.6 mm (2.5 in)
1903
38.6 mm (1.5 in)
1904
21.8 mm (0.9 in)
1905
27.2 mm (1.1 in)
1906
53.7 mm (2.1 in)
1907
81.6 mm (3.2 in)
1908
89.1 mm (3.5 in)
1909
30.7 mm (1.2 in)
1910
51.1 mm (2.0 in)
1911
34.8 mm (1.4 in)
1912
32.8 mm (1.3 in)
1913
47.0 mm (1.9 in)
1914
40.2 mm (1.6 in)
1915
56.9 mm (2.2 in)
1916
58.0 mm (2.3 in)
1917
30.8 mm (1.2 in)
1918
29.0 mm (1.1 in)
1919
25.4 mm (1.0 in)
1920
27.4 mm (1.1 in)
1921
28.0 mm (1.1 in)
1922
41.4 mm (1.6 in)
1923
69.9 mm (2.8 in)
1924
19.5 mm (0.8 in)
1925
35.3 mm (1.4 in)
1926
54.2 mm (2.1 in)
1927
52.3 mm (2.1 in)
1928
27.9 mm (1.1 in)
1929
30.3 mm (1.2 in)
1930
24.6 mm (1.0 in)
1931
30.2 mm (1.2 in)
1932
31.0 mm (1.2 in)
1933
54.2 mm (2.1 in)
1934
33.5 mm (1.3 in)
1935
25.5 mm (1.0 in)
1936
34.0 mm (1.3 in)
1937
40.8 mm (1.6 in)
1938
63.1 mm (2.5 in)
1939
33.4 mm (1.3 in)
1940
26.2 mm (1.0 in)
1941
51.0 mm (2.0 in)
1942
43.0 mm (1.7 in)
1943
67.1 mm (2.6 in)
1944
62.5 mm (2.5 in)
1945
40.8 mm (1.6 in)
1946
31.8 mm (1.3 in)
1947
82.3 mm (3.2 in)
1948
67.6 mm (2.7 in)
1949
38.4 mm (1.5 in)
1950
12.6 mm (0.5 in)
1953
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Canyon Ferry, 1898 to 1953. The record is 64 days in 1921, marked on the chart; the median year is 36 days.
Longest dry spell (CDD) at Canyon Ferry by year
Year
Longest dry spell (CDD)
1898
n/a
1899
44 days
1900
40 days
1901
40 days
1902
31 days
1903
32 days
1904
52 days
1905
40 days
1906
26 days
1907
35 days
1908
40 days
1909
24 days
1910
37 days
1911
31 days
1912
51 days
1913
32 days
1914
24 days
1915
51 days
1916
33 days
1917
37 days
1918
46 days
1919
36 days
1920
44 days
1921
64 days
1922
42 days
1923
40 days
1924
25 days
1925
39 days
1926
31 days
1927
21 days
1928
63 days
1929
37 days
1930
47 days
1931
29 days
1932
40 days
1933
28 days
1934
44 days
1935
47 days
1936
29 days
1937
44 days
1938
28 days
1939
43 days
1940
33 days
1941
32 days
1942
25 days
1943
31 days
1944
36 days
1945
29 days
1946
64 days
1947
17 days
1948
37 days
1949
35 days
1950
15 days
1953
1 day
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
49 years with a frost
Across 49 years with a frost, the median last spring frost at Canyon Ferry falls on 15 May and the median first autumn frost on 20 September, which leaves a median of 127 days between them.
Fitted over all years, the growing season changes by -2.9 days per decade at this station.
Frost dates and growing season at Canyon Ferry
Measure
Median, all years
Earliest period
Recent period (1919 to 1949)
Recent against earliest
Fitted trend
Last spring frost
15 May
n/a
17 May
n/a
+2.7 days per decade
First autumn frost
20 September
n/a
22 September
n/a
-0.2 days per decade
Growing days
127 days
n/a
125 days
n/a
-2.9 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
50 years, 1899 to 1949
A day with at least 25.8 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 83.4 mm (3.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Canyon Ferry: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
25.8 mm (1.0 in)
5 years
37.1 mm (1.5 in)
10 years
45.9 mm (1.8 in)
25 years
59.1 mm (2.3 in)
50 years
70.5 mm (2.8 in)
100 years
83.4 mm (3.3 in)
Longer than the 50 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, 50 years of values from 1899 to 1949.
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: 92.7 mm (3.6 in) in 1900; 63.5 mm (2.5 in) in 1908; 50.8 mm (2.0 in) in 1948.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Canyon Ferry standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Canyon Ferry 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.