Record envelope, standing records and threshold days for Miles City (USC00245685), Montana, United States, with 90 years of record.
Key Facts for Miles City
Miles City (USC00245685) is a weather station in Montana, United States at 46.40 latitude and -105.82 longitude, 720 m (2,362 ft) above sea level.
The station reports from 1893 to 1982, 90 years of record.
1,464 records set at Miles City still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Miles City set a daily record low minimum temperature of 7.2 C (45.0 F) on 25 July 1982.
About the Station
Location: Montana, United States, 46.40 latitude, -105.82 longitude.
Elevation: 720 m (2,362 ft).
Period of record: 1893 to 1982, 90 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
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 Miles City. 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 Miles City, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-43.3 C (-45.9 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-45.0 C (-49.0 F)
n/a
n/a
Mar
31.1 C (88.0 F)
-34.4 C (-29.9 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-21.7 C (-7.1 F)
n/a
n/a
May
38.9 C (102.0 F)
-10.6 C (12.9 F)
n/a
n/a
Jun
42.2 C (108.0 F)
0.0 C (32.0 F)
n/a
n/a
Jul
45.0 C (113.0 F)
4.4 C (39.9 F)
n/a
n/a
Aug
43.9 C (111.0 F)
1.1 C (34.0 F)
n/a
n/a
Sep
41.1 C (106.0 F)
-8.3 C (17.1 F)
n/a
n/a
Oct
36.1 C (97.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-33.3 C (-27.9 F)
n/a
n/a
Dec
21.7 C (71.1 F)
-41.7 C (-43.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Miles City still stand. 1936 holds the most, with 48.
Standing records at Miles City by the year they were set
Year set
Standing records
1893
21
1894
7
1895
15
1896
24
1897
27
1898
25
1899
21
1900
24
1901
26
1902
5
1903
19
1904
6
1905
19
1906
19
1907
12
1908
15
1909
15
1910
33
1911
16
1912
13
1913
18
1914
13
1915
17
1916
27
1917
21
1918
36
1919
42
1920
21
1921
32
1922
18
1923
17
1924
19
1925
24
1926
17
1927
21
1928
8
1929
14
1930
19
1931
23
1932
20
1933
16
1934
27
1935
21
1936
48
1937
11
1938
7
1939
24
1940
12
1941
7
1942
12
1951
30
1952
23
1953
21
1954
37
1955
23
1956
24
1957
11
1958
17
1959
16
1960
18
1961
16
1962
20
1963
17
1964
13
1965
18
1966
18
1967
14
1968
16
1969
19
1970
6
1971
8
1972
17
1973
6
1974
11
1975
3
1976
11
1977
9
1978
8
1979
8
1980
12
1981
11
1982
9
All-Time Record Progression
3 new records
3 all-time records were set at Miles City between 15 February 1936 and 20 July 1960. Each dot is a new record.
When Miles City set new all-time records
Date
Kind
Detail
1936-02-15
Record low maximum temperature
Record low maximum temperature -28.9 C (-20.0 F)
1939-02-08
Record low maximum temperature
Record low maximum temperature -29.4 C (-20.9 F)
1960-07-20
Record high maximum temperature
Record high maximum temperature 45.0 C (113.0 F)
Wettest Day of Each Month
May: 89.9 mm (3.5 in)
The wettest day on record for each calendar month at Miles City. The most was 89.9 mm (3.5 in) on 20 May 1908.
Record daily precipitation for each month at Miles City
Month
Record daily precipitation (mm)
Date
Jan
21.6 mm (0.9 in)
31 January 1911
Feb
23.6 mm (0.9 in)
3 February 1915
Mar
71.1 mm (2.8 in)
20 March 1894
Apr
33.8 mm (1.3 in)
25 April 1969
May
89.9 mm (3.5 in)
20 May 1908
Jun
81.8 mm (3.2 in)
18 June 1964
Jul
62.2 mm (2.4 in)
7 July 1928
Aug
77.7 mm (3.1 in)
10 August 1900
Sep
54.1 mm (2.1 in)
3 September 1973
Oct
57.4 mm (2.3 in)
2 October 1971
Nov
36.3 mm (1.4 in)
9 November 1978
Dec
15.2 mm (0.6 in)
15 December 1921
Period of Record Coverage
1893 to 1982
Complete yearUnder 90 percent of days
82 years of record at Miles City, 1893 to 1982. 23 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1895, 1897, 1898, 1899, 1900, 1901 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 77 complete years at Miles City, 1893 to 1981. Blue stripes are years cooler than the station's own mean of 8.0 C (46.3 F); red stripes are warmer. The coolest year was 1978, at 5.7 C (42.2 F), and the warmest was 1953, at 10.0 C (50.1 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Miles City as warming stripes, 1893 to 1981
Year
Annual mean temperature
Difference from the station mean
1893
6.7 C
-1.25 C
1894
7.7 C
-0.30 C
1895
6.5 C
-1.48 C
1896
6.7 C
-1.25 C
1897
7.1 C
-0.88 C
1899
6.2 C
-1.78 C
1900
9.7 C
+1.77 C
1901
9.1 C
+1.15 C
1902
8.0 C
+0.07 C
1903
8.0 C
+0.07 C
1904
8.0 C
+0.04 C
1905
8.2 C
+0.24 C
1906
8.8 C
+0.83 C
1907
7.3 C
-0.67 C
1908
8.7 C
+0.70 C
1909
7.7 C
-0.32 C
1910
9.5 C
+1.53 C
1911
7.4 C
-0.59 C
1912
7.4 C
-0.55 C
1913
8.3 C
+0.29 C
1914
9.1 C
+1.08 C
1915
8.4 C
+0.38 C
1916
6.2 C
-1.79 C
1917
6.4 C
-1.59 C
1918
8.1 C
+0.17 C
1919
8.1 C
+0.13 C
1920
7.9 C
-0.07 C
1921
9.8 C
+1.81 C
1922
6.9 C
-1.03 C
1923
8.6 C
+0.67 C
1924
6.6 C
-1.39 C
1925
8.0 C
+0.03 C
1926
8.5 C
+0.52 C
1927
6.0 C
-1.98 C
1928
7.8 C
-0.14 C
1929
6.2 C
-1.78 C
1930
8.4 C
+0.47 C
1931
9.9 C
+1.88 C
1932
7.4 C
-0.60 C
1933
8.5 C
+0.51 C
1934
10.0 C
+2.05 C
1935
7.7 C
-0.23 C
1936
7.4 C
-0.53 C
1937
7.0 C
-0.96 C
1938
8.7 C
+0.74 C
1939
9.0 C
+1.00 C
1940
8.5 C
+0.51 C
1941
8.9 C
+0.92 C
1942
8.0 C
+0.02 C
1951
6.1 C
-1.89 C
1952
8.1 C
+0.16 C
1953
10.0 C
+2.07 C
1954
9.0 C
+1.04 C
1955
7.3 C
-0.68 C
1956
8.5 C
+0.49 C
1957
8.2 C
+0.24 C
1958
9.0 C
+1.02 C
1959
7.6 C
-0.37 C
1960
8.4 C
+0.43 C
1961
9.3 C
+1.29 C
1962
8.7 C
+0.73 C
1963
9.4 C
+1.47 C
1964
7.9 C
-0.06 C
1965
7.0 C
-1.01 C
1966
7.7 C
-0.24 C
1967
8.6 C
+0.65 C
1968
7.8 C
-0.17 C
1969
6.8 C
-1.21 C
1970
7.1 C
-0.83 C
1971
7.2 C
-0.76 C
1972
6.6 C
-1.33 C
1974
8.8 C
+0.81 C
1975
7.2 C
-0.81 C
1976
8.9 C
+0.93 C
1977
8.0 C
-0.01 C
1978
5.7 C
-2.28 C
1981
9.9 C
+1.91 C
The fitted trend in annual mean temperature here over 1893 to 1981 is 0.03 C (-0.06 to 0.13) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) per decade. The slope is a straight line fitted to 77 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Miles City
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.03 C (-0.06 to 0.13) per decade
0.1 F (-0.1 to 0.2) per decade
1893 to 1981
77
Not clearly different from zero
Mean daily maximum
0.15 C (0.04 to 0.27) per decade
0.3 F (0.1 to 0.5) per decade
1893 to 1981
77
Rise
Mean daily minimum
-0.08 C (-0.19 to 0.02) per decade
-0.15 F (-0.33 to 0.03) per decade
1893 to 1981
77
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
1893 to 1982
Yearly extremes at Miles City: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
1960
40.0 C (104.0 F)
82
Coldest night (TNn)
-45.0 C (-49.0 F)
1899
-34.4 C (-29.9 F)
82
Wettest day (Rx1day)
89.9 mm (3.5 in)
1908
30.2 mm (1.2 in)
83
Wettest five days (Rx5day)
133.8 mm (5.3 in)
1921
49.3 mm (1.9 in)
83
Longest dry spell (CDD)
82 days
1939
35 days
83
Hottest day (TXx)
The hottest day of the year at Miles City, 1893 to 1982. The record is 45.0 C (113.0 F) in 1960, marked on the chart; the median year is 40.0 C (104.0 F).
Hottest day (TXx) at Miles City by year
Year
Hottest day (TXx)
1893
41.7 C (107.1 F)
1894
39.4 C (102.9 F)
1895
38.3 C (100.9 F)
1896
36.7 C (98.1 F)
1897
38.3 C (100.9 F)
1898
39.4 C (102.9 F)
1899
38.3 C (100.9 F)
1900
43.3 C (109.9 F)
1901
43.9 C (111.0 F)
1902
36.7 C (98.1 F)
1903
40.0 C (104.0 F)
1904
37.8 C (100.0 F)
1905
37.8 C (100.0 F)
1906
41.1 C (106.0 F)
1907
40.0 C (104.0 F)
1908
42.2 C (108.0 F)
1909
40.6 C (105.1 F)
1910
42.2 C (108.0 F)
1911
38.9 C (102.0 F)
1912
38.9 C (102.0 F)
1913
38.9 C (102.0 F)
1914
40.0 C (104.0 F)
1915
35.0 C (95.0 F)
1916
40.0 C (104.0 F)
1917
41.1 C (106.0 F)
1918
40.6 C (105.1 F)
1919
41.7 C (107.1 F)
1920
40.0 C (104.0 F)
1921
38.9 C (102.0 F)
1922
37.8 C (100.0 F)
1923
38.9 C (102.0 F)
1924
39.4 C (102.9 F)
1925
40.6 C (105.1 F)
1926
40.6 C (105.1 F)
1927
37.2 C (99.0 F)
1928
40.0 C (104.0 F)
1929
41.1 C (106.0 F)
1930
41.7 C (107.1 F)
1931
41.7 C (107.1 F)
1932
39.4 C (102.9 F)
1933
41.1 C (106.0 F)
1934
41.7 C (107.1 F)
1935
42.2 C (108.0 F)
1936
42.2 C (108.0 F)
1937
41.7 C (107.1 F)
1938
38.3 C (100.9 F)
1939
40.0 C (104.0 F)
1940
40.0 C (104.0 F)
1941
40.0 C (104.0 F)
1942
37.2 C (99.0 F)
1950
n/a
1951
41.1 C (106.0 F)
1952
41.1 C (106.0 F)
1953
41.7 C (107.1 F)
1954
43.3 C (109.9 F)
1955
41.1 C (106.0 F)
1956
43.3 C (109.9 F)
1957
41.1 C (106.0 F)
1958
43.9 C (111.0 F)
1959
42.8 C (109.0 F)
1960
45.0 C (113.0 F)
1961
43.3 C (109.9 F)
1962
40.0 C (104.0 F)
1963
39.4 C (102.9 F)
1964
41.7 C (107.1 F)
1965
41.7 C (107.1 F)
1966
45.0 C (113.0 F)
1967
40.6 C (105.1 F)
1968
42.2 C (108.0 F)
1969
39.4 C (102.9 F)
1970
39.4 C (102.9 F)
1971
38.3 C (100.9 F)
1972
35.0 C (95.0 F)
1973
37.2 C (99.0 F)
1974
38.9 C (102.0 F)
1975
40.6 C (105.1 F)
1976
40.6 C (105.1 F)
1977
40.6 C (105.1 F)
1978
37.2 C (99.0 F)
1979
38.9 C (102.0 F)
1980
38.9 C (102.0 F)
1981
42.8 C (109.0 F)
1982
37.8 C (100.0 F)
Coldest night (TNn)
The coldest night of the year at Miles City, 1893 to 1982. The record is -45.0 C (-49.0 F) in 1899, marked on the chart; the median year is -34.4 C (-29.9 F).
Coldest night (TNn) at Miles City by year
Year
Coldest night (TNn)
1893
-42.8 C (-45.0 F)
1894
-34.4 C (-29.9 F)
1895
-35.6 C (-32.1 F)
1896
-31.7 C (-25.1 F)
1897
-35.0 C (-31.0 F)
1898
-25.0 C (-13.0 F)
1899
-45.0 C (-49.0 F)
1900
-26.7 C (-16.1 F)
1901
-31.1 C (-24.0 F)
1902
-30.0 C (-22.0 F)
1903
-34.4 C (-29.9 F)
1904
-28.9 C (-20.0 F)
1905
-40.0 C (-40.0 F)
1906
-27.2 C (-17.0 F)
1907
-36.1 C (-33.0 F)
1908
-34.4 C (-29.9 F)
1909
-34.4 C (-29.9 F)
1910
-33.9 C (-29.0 F)
1911
-33.3 C (-27.9 F)
1912
-37.8 C (-36.0 F)
1913
-36.7 C (-34.1 F)
1914
-35.6 C (-32.1 F)
1915
-34.4 C (-29.9 F)
1916
-43.3 C (-45.9 F)
1917
-38.9 C (-38.0 F)
1918
-37.8 C (-36.0 F)
1919
-34.4 C (-29.9 F)
1920
-35.0 C (-31.0 F)
1921
-26.1 C (-15.0 F)
1922
-36.7 C (-34.1 F)
1923
-32.8 C (-27.0 F)
1924
-41.7 C (-43.1 F)
1925
-34.4 C (-29.9 F)
1926
-27.8 C (-18.0 F)
1927
-35.0 C (-31.0 F)
1928
-36.1 C (-33.0 F)
1929
-38.9 C (-38.0 F)
1930
-35.0 C (-31.0 F)
1931
-24.4 C (-11.9 F)
1932
-32.2 C (-26.0 F)
1933
-37.2 C (-35.0 F)
1934
-25.0 C (-13.0 F)
1935
-32.2 C (-26.0 F)
1936
-42.8 C (-45.0 F)
1937
-35.0 C (-31.0 F)
1938
-31.1 C (-24.0 F)
1939
-38.3 C (-36.9 F)
1940
-34.4 C (-29.9 F)
1941
-28.9 C (-20.0 F)
1942
-33.3 C (-27.9 F)
1950
n/a
1951
-35.6 C (-32.1 F)
1952
-33.9 C (-29.0 F)
1953
-25.6 C (-14.1 F)
1954
-41.1 C (-42.0 F)
1955
-33.3 C (-27.9 F)
1956
-35.0 C (-31.0 F)
1957
-37.8 C (-36.0 F)
1958
-32.2 C (-26.0 F)
1959
-35.6 C (-32.1 F)
1960
-32.2 C (-26.0 F)
1961
-30.0 C (-22.0 F)
1962
-32.8 C (-27.0 F)
1963
-36.7 C (-34.1 F)
1964
-35.0 C (-31.0 F)
1965
-29.4 C (-20.9 F)
1966
-36.1 C (-33.0 F)
1967
-35.6 C (-32.1 F)
1968
-34.4 C (-29.9 F)
1969
-38.9 C (-38.0 F)
1970
-33.9 C (-29.0 F)
1971
-38.3 C (-36.9 F)
1972
-34.4 C (-29.9 F)
1973
-30.6 C (-23.1 F)
1974
-32.2 C (-26.0 F)
1975
-28.3 C (-18.9 F)
1976
-35.0 C (-31.0 F)
1977
-37.2 C (-35.0 F)
1978
-35.0 C (-31.0 F)
1979
-36.1 C (-33.0 F)
1980
-30.6 C (-23.1 F)
1981
-28.9 C (-20.0 F)
1982
-39.4 C (-38.9 F)
Wettest day (Rx1day)
The wettest day of the year at Miles City, 1893 to 1982. The record is 89.9 mm (3.5 in) in 1908, marked on the chart; the median year is 30.2 mm (1.2 in).
Wettest day (Rx1day) at Miles City by year
Year
Wettest day (Rx1day)
1893
33.5 mm (1.3 in)
1894
71.1 mm (2.8 in)
1895
25.4 mm (1.0 in)
1896
26.7 mm (1.1 in)
1897
27.9 mm (1.1 in)
1898
36.8 mm (1.4 in)
1899
32.5 mm (1.3 in)
1900
77.7 mm (3.1 in)
1901
33.0 mm (1.3 in)
1902
30.5 mm (1.2 in)
1903
36.6 mm (1.4 in)
1904
34.5 mm (1.4 in)
1905
28.4 mm (1.1 in)
1906
29.5 mm (1.2 in)
1907
30.5 mm (1.2 in)
1908
89.9 mm (3.5 in)
1909
19.8 mm (0.8 in)
1910
18.0 mm (0.7 in)
1911
31.8 mm (1.3 in)
1912
32.0 mm (1.3 in)
1913
36.1 mm (1.4 in)
1914
27.9 mm (1.1 in)
1915
53.3 mm (2.1 in)
1916
23.6 mm (0.9 in)
1917
22.4 mm (0.9 in)
1918
17.8 mm (0.7 in)
1919
19.8 mm (0.8 in)
1920
30.2 mm (1.2 in)
1921
64.8 mm (2.6 in)
1922
57.7 mm (2.3 in)
1923
53.8 mm (2.1 in)
1924
11.7 mm (0.5 in)
1925
25.4 mm (1.0 in)
1926
26.7 mm (1.1 in)
1927
25.1 mm (1.0 in)
1928
62.2 mm (2.4 in)
1929
30.5 mm (1.2 in)
1930
36.1 mm (1.4 in)
1931
13.5 mm (0.5 in)
1932
22.1 mm (0.9 in)
1933
16.8 mm (0.7 in)
1934
15.7 mm (0.6 in)
1935
33.8 mm (1.3 in)
1936
23.6 mm (0.9 in)
1937
32.0 mm (1.3 in)
1938
36.3 mm (1.4 in)
1939
24.9 mm (1.0 in)
1940
27.4 mm (1.1 in)
1941
53.1 mm (2.1 in)
1942
21.3 mm (0.8 in)
1950
25.4 mm (1.0 in)
1951
29.2 mm (1.1 in)
1952
17.5 mm (0.7 in)
1953
43.9 mm (1.7 in)
1954
26.4 mm (1.0 in)
1955
61.5 mm (2.4 in)
1956
30.7 mm (1.2 in)
1957
23.9 mm (0.9 in)
1958
19.3 mm (0.8 in)
1959
24.9 mm (1.0 in)
1960
19.1 mm (0.8 in)
1961
30.7 mm (1.2 in)
1962
46.7 mm (1.8 in)
1963
28.7 mm (1.1 in)
1964
81.8 mm (3.2 in)
1965
26.7 mm (1.1 in)
1966
38.1 mm (1.5 in)
1967
52.1 mm (2.1 in)
1968
51.8 mm (2.0 in)
1969
33.8 mm (1.3 in)
1970
26.4 mm (1.0 in)
1971
57.4 mm (2.3 in)
1972
45.2 mm (1.8 in)
1973
54.1 mm (2.1 in)
1974
24.1 mm (0.9 in)
1975
17.8 mm (0.7 in)
1976
27.4 mm (1.1 in)
1977
22.9 mm (0.9 in)
1978
36.3 mm (1.4 in)
1979
30.0 mm (1.2 in)
1980
20.3 mm (0.8 in)
1981
39.4 mm (1.6 in)
1982
31.2 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Miles City, 1893 to 1982. The record is 133.8 mm (5.3 in) in 1921, marked on the chart; the median year is 49.3 mm (1.9 in).
Wettest five days (Rx5day) at Miles City by year
Year
Wettest five days (Rx5day)
1893
54.9 mm (2.2 in)
1894
79.8 mm (3.1 in)
1895
52.8 mm (2.1 in)
1896
32.0 mm (1.3 in)
1897
53.8 mm (2.1 in)
1898
49.0 mm (1.9 in)
1899
53.1 mm (2.1 in)
1900
93.9 mm (3.7 in)
1901
57.9 mm (2.3 in)
1902
42.7 mm (1.7 in)
1903
42.7 mm (1.7 in)
1904
51.7 mm (2.0 in)
1905
47.3 mm (1.9 in)
1906
67.8 mm (2.7 in)
1907
55.6 mm (2.2 in)
1908
103.1 mm (4.1 in)
1909
45.7 mm (1.8 in)
1910
35.5 mm (1.4 in)
1911
45.3 mm (1.8 in)
1912
82.8 mm (3.3 in)
1913
49.5 mm (1.9 in)
1914
50.8 mm (2.0 in)
1915
96.0 mm (3.8 in)
1916
42.9 mm (1.7 in)
1917
38.2 mm (1.5 in)
1918
39.6 mm (1.6 in)
1919
37.3 mm (1.5 in)
1920
52.4 mm (2.1 in)
1921
133.8 mm (5.3 in)
1922
74.4 mm (2.9 in)
1923
103.8 mm (4.1 in)
1924
27.0 mm (1.1 in)
1925
28.0 mm (1.1 in)
1926
30.2 mm (1.2 in)
1927
51.9 mm (2.0 in)
1928
78.0 mm (3.1 in)
1929
46.2 mm (1.8 in)
1930
49.3 mm (1.9 in)
1931
18.0 mm (0.7 in)
1932
63.0 mm (2.5 in)
1933
30.6 mm (1.2 in)
1934
17.0 mm (0.7 in)
1935
47.6 mm (1.9 in)
1936
24.3 mm (1.0 in)
1937
32.8 mm (1.3 in)
1938
46.0 mm (1.8 in)
1939
47.7 mm (1.9 in)
1940
45.9 mm (1.8 in)
1941
53.9 mm (2.1 in)
1942
42.1 mm (1.7 in)
1950
42.9 mm (1.7 in)
1951
65.4 mm (2.6 in)
1952
37.1 mm (1.5 in)
1953
55.5 mm (2.2 in)
1954
54.4 mm (2.1 in)
1955
62.3 mm (2.5 in)
1956
43.2 mm (1.7 in)
1957
35.0 mm (1.4 in)
1958
42.6 mm (1.7 in)
1959
30.2 mm (1.2 in)
1960
23.1 mm (0.9 in)
1961
43.1 mm (1.7 in)
1962
52.8 mm (2.1 in)
1963
66.9 mm (2.6 in)
1964
103.4 mm (4.1 in)
1965
58.5 mm (2.3 in)
1966
48.3 mm (1.9 in)
1967
69.2 mm (2.7 in)
1968
60.7 mm (2.4 in)
1969
59.5 mm (2.3 in)
1970
39.9 mm (1.6 in)
1971
90.2 mm (3.6 in)
1972
49.3 mm (1.9 in)
1973
79.0 mm (3.1 in)
1974
46.3 mm (1.8 in)
1975
36.9 mm (1.5 in)
1976
41.1 mm (1.6 in)
1977
35.1 mm (1.4 in)
1978
68.9 mm (2.7 in)
1979
53.9 mm (2.1 in)
1980
45.5 mm (1.8 in)
1981
54.9 mm (2.2 in)
1982
61.2 mm (2.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Miles City, 1893 to 1982. The record is 82 days in 1939, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Miles City by year
Year
Longest dry spell (CDD)
1893
55 days
1894
30 days
1895
31 days
1896
30 days
1897
26 days
1898
23 days
1899
52 days
1900
48 days
1901
29 days
1902
33 days
1903
29 days
1904
78 days
1905
49 days
1906
34 days
1907
66 days
1908
24 days
1909
30 days
1910
22 days
1911
40 days
1912
50 days
1913
65 days
1914
32 days
1915
33 days
1916
43 days
1917
30 days
1918
19 days
1919
42 days
1920
19 days
1921
34 days
1922
33 days
1923
37 days
1924
38 days
1925
20 days
1926
40 days
1927
21 days
1928
36 days
1929
22 days
1930
26 days
1931
38 days
1932
33 days
1933
25 days
1934
55 days
1935
35 days
1936
34 days
1937
31 days
1938
29 days
1939
82 days
1940
36 days
1941
53 days
1942
28 days
1950
17 days
1951
37 days
1952
42 days
1953
40 days
1954
35 days
1955
22 days
1956
36 days
1957
33 days
1958
37 days
1959
37 days
1960
43 days
1961
31 days
1962
28 days
1963
66 days
1964
28 days
1965
42 days
1966
29 days
1967
36 days
1968
29 days
1969
68 days
1970
47 days
1971
57 days
1972
35 days
1973
38 days
1974
60 days
1975
30 days
1976
56 days
1977
35 days
1978
23 days
1979
41 days
1980
39 days
1981
35 days
1982
21 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
77 years with a frost
Across 77 years with a frost, the median last spring frost at Miles City falls on 6 May and the median first autumn frost on 27 September, which leaves a median of 147 days between them.
In 1941 to 1981 the median growing season was 142 days. That is 7 days fewer than in 1893 to 1923.
Fitted over all years, the growing season changes by -1.1 days per decade at this station.
Frost dates and growing season at Miles City
Measure
Median, all years
Earliest period (1893 to 1923)
Recent period (1941 to 1981)
Recent against earliest
Fitted trend
Last spring frost
6 May
7 May
7 May
no change
+0.4 days per decade
First autumn frost
27 September
29 September
26 September
3 days earlier
-0.7 days per decade
Growing days
147 days
149 days
142 days
7 days fewer
-1.1 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
79 years, 1893 to 1981
A day with at least 30.4 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 98.4 mm (3.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Miles City: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
30.4 mm (1.2 in)
5 years
43.9 mm (1.7 in)
10 years
54.4 mm (2.1 in)
25 years
70.0 mm (2.8 in)
50 years
83.4 mm (3.3 in)
100 years
98.4 mm (3.9 in)
Longer than the 79 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, 79 years of values from 1893 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: 89.9 mm (3.5 in) in 1908; 81.8 mm (3.2 in) in 1964; 77.7 mm (3.1 in) in 1900.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Miles City, at 1969. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1969 ran 0.4 C (0.7 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Miles City, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1969
-0.4
-0.7
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Miles City standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Miles City 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.