Miles City Weather Records (USC00245685)

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

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

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

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.

Days with data per year at Miles City
Year	Days with data	Share of year	Complete
1893	316	87%	No
1894	328	90%	No
1895	324	89%	No
1896	335	92%	Yes
1897	322	88%	No
1898	310	85%	No
1899	320	88%	No
1900	316	87%	No
1901	325	89%	No
1902	328	90%	No
1903	322	88%	No
1904	325	89%	No
1905	335	92%	Yes
1906	319	87%	No
1907	331	91%	Yes
1908	322	88%	No
1909	326	89%	No
1910	322	88%	No
1911	324	89%	No
1912	321	88%	No
1913	327	90%	No
1914	325	89%	No
1915	320	88%	No
1916	349	95%	Yes
1917	364	100%	Yes
1918	365	100%	Yes
1919	365	100%	Yes
1920	363	99%	Yes
1921	362	99%	Yes
1922	364	100%	Yes
1923	363	99%	Yes
1924	366	100%	Yes
1925	365	100%	Yes
1926	365	100%	Yes
1927	365	100%	Yes
1928	366	100%	Yes
1929	365	100%	Yes
1930	365	100%	Yes
1931	365	100%	Yes
1932	366	100%	Yes
1933	365	100%	Yes
1934	364	100%	Yes
1935	364	100%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1951	364	100%	Yes
1952	365	100%	Yes
1953	365	100%	Yes
1954	361	99%	Yes
1955	355	97%	Yes
1956	364	99%	Yes
1957	365	100%	Yes
1958	364	100%	Yes
1959	365	100%	Yes
1960	365	100%	Yes
1961	364	100%	Yes
1962	365	100%	Yes
1963	364	100%	Yes
1964	362	99%	Yes
1965	365	100%	Yes
1966	362	99%	Yes
1967	362	99%	Yes
1968	364	99%	Yes
1969	365	100%	Yes
1970	361	99%	Yes
1971	356	98%	Yes
1972	360	98%	Yes
1973	330	90%	Yes
1974	359	98%	Yes
1975	364	100%	Yes
1976	362	99%	Yes
1977	365	100%	Yes
1978	359	98%	Yes
1979	300	82%	No
1980	296	81%	No
1981	353	97%	Yes
1982	203	56%	No

Latest Records

Latest records at Miles City
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 July 1982	Miles City, US	daily low min	7.2 C (45.0 F)	0.6 C (1.1 F)	64 years	29 of 100 (Routine)
24 July 1982	Miles City, US	daily low min (Tie)	6.7 C (44.1 F)	tie	85 years	8 of 100 (Routine)
17 July 1982	Miles City, US	daily low min	6.7 C (44.1 F)	3.3 C (5.9 F)	75 years	40 of 100 (Notable)
29 June 1982	Miles City, US	daily rain	28.2 mm (1.1 in)	10.2 mm (0.4 in)	72 years	42 of 100 (Notable)
9 June 1982	Miles City, US	daily low min (Tie)	1.7 C (35.1 F)	tie	86 years	8 of 100 (Routine)
7 June 1982	Miles City, US	daily low min	1.7 C (35.1 F)	2.7 C (4.9 F)	67 years	35 of 100 (Notable)
6 June 1982	Miles City, US	daily rain	31.2 mm (1.2 in)	4.5 mm (0.18 in)	85 years	39 of 100 (Notable)
31 May 1982	Miles City, US	daily low min	-2.2 C (28.0 F)	2.2 C (4.0 F)	64 years	33 of 100 (Routine)
29 May 1982	Miles City, US	daily low min (Tie)	1.1 C (34.0 F)	tie	86 years	8 of 100 (Routine)
26 April 1982	Miles City, US	daily low min	-3.9 C (25.0 F)	0.6 C (1.1 F)	49 years	24 of 100 (Routine)
20 February 1982	Miles City, US	daily high max	16.1 C (61.0 F)	1.1 C (2.0 F)	0 years	10 of 100 (Routine)
3 February 1982	Miles City, US	daily low min	-39.4 C (-38.9 F)	2.2 C (4.0 F)	88 years	37 of 100 (Notable)
23 January 1982	Miles City, US	daily low min	-35.6 C (-32.1 F)	1.7 C (3.1 F)	30 years	19 of 100 (Routine)
10 January 1982	Miles City, US	daily low min	-35.6 C (-32.1 F)	5.0 C (9.0 F)	72 years	35 of 100 (Notable)
25 November 1981	Miles City, US	daily rain	9.7 mm (0.38 in)	3.6 mm (0.14 in)	55 years	20 of 100 (Routine)
22 November 1981	Miles City, US	daily rain	4.6 mm (0.18 in)	1.3 mm (0.05 in)	48 years	20 of 100 (Routine)
23 October 1981	Miles City, US	daily low min (Tie)	-9.4 C (15.1 F)	tie	62 years	6 of 100 (Routine)
12 October 1981	Miles City, US	daily rain	16.5 mm (0.6 in)	6.3 mm (0.25 in)	56 years	20 of 100 (Routine)
13 September 1981	Miles City, US	daily high max (Tie)	34.4 C (93.9 F)	tie	85 years	8 of 100 (Routine)
19 August 1981	Miles City, US	daily high max	40.0 C (104.0 F)	0.6 C (1.1 F)	16 years	14 of 100 (Routine)

Climate Trend

77 complete years, 1893 to 1981

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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).