Miles City Threshold Days by Year (USC00245685)

21 fixed thresholds counted per year at Miles City (USC00245685): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Miles City Thresholds

Miles City: nights with a minimum temperature at or below 0 C (32 F) in 79 years, most in 1951 with 196.
Miles City: nights with a minimum temperature at or below -10 C (14 F) in 79 years, most in 1978 with 102.
Miles City: nights with a minimum temperature at or below -20 C (-4 F) in 79 years, most in 1916 with 53.
Miles City: days with 10 mm (0.39 in) or more of precipitation in 79 years, most in 1978 with 14.
21 fixed thresholds have at least one qualifying day at Miles City.

Days at or above 30 C (86 F)

59 years with a qualifying day

Days per year at Miles City with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 87 in 1961.

Days at or above 30 C (86 F) per year at Miles City
Year	Days	Decade average
1896	53	53
1905	50	45.5
1907	41	45.5
1916	51	57.5
1917	54	57.5
1918	48	57.5
1919	77	57.5
1920	61	49.7
1921	70	49.7
1922	67	49.7
1923	44	49.7
1924	37	49.7
1925	42	49.7
1926	46	49.7
1927	35	49.7
1928	38	49.7
1929	57	49.7
1930	51	61.2
1931	65	61.2
1932	54	61.2
1933	66	61.2
1934	67	61.2
1935	53	61.2
1936	79	61.2
1937	63	61.2
1938	54	61.2
1939	60	61.2
1940	65	51.3
1941	49	51.3
1942	40	51.3
1951	51	73
1952	81	73
1953	85	73
1954	65	73
1955	78	73
1956	86	73
1957	68	73
1958	68	73
1959	75	73
1960	76	68.4
1961	87	68.4
1962	59	68.4
1963	75	68.4
1964	64	68.4
1965	45	68.4
1966	82	68.4
1967	79	68.4
1968	52	68.4
1969	65	68.4
1970	71	57.9
1971	65	57.9
1972	46	57.9
1973	50	57.9
1974	57	57.9
1975	50	57.9
1976	74	57.9
1977	52	57.9
1978	56	57.9
1981	67	67

For each year, a bar from the first to the last day at Miles City meeting 30 C (86 F).

First to last qualifying date each year at Miles City
Year	First date	Last date
1896	1896-06-12	1896-10-02
1905	1905-05-21	1905-10-05
1907	1907-06-11	1907-10-05
1916	1916-05-06	1916-09-18
1917	1917-05-14	1917-09-23
1918	1918-05-03	1918-09-22
1919	1919-05-20	1919-09-18
1920	1920-05-21	1920-10-06
1921	1921-06-07	1921-09-27
1922	1922-05-25	1922-10-03
1923	1923-05-25	1923-09-14
1924	1924-05-03	1924-09-30
1925	1925-05-19	1925-09-25
1926	1926-04-29	1926-08-30
1927	1927-04-27	1927-10-17
1928	1928-05-06	1928-09-29
1929	1929-05-24	1929-09-20
1930	1930-06-11	1930-09-17
1931	1931-05-13	1931-09-28
1932	1932-05-12	1932-09-17
1933	1933-05-30	1933-10-04
1934	1934-05-05	1934-10-11
1935	1935-06-08	1935-09-22
1936	1936-05-04	1936-09-22
1937	1937-05-27	1937-09-20
1938	1938-05-27	1938-09-28
1939	1939-04-29	1939-09-21
1940	1940-05-11	1940-09-17
1941	1941-05-12	1941-09-18
1942	1942-07-02	1942-10-10
1951	1951-04-29	1951-09-10
1952	1952-04-18	1952-09-29
1953	1953-05-06	1953-10-14
1954	1954-05-19	1954-10-07
1955	1955-05-01	1955-10-10
1956	1956-05-17	1956-10-02
1957	1957-04-29	1957-10-03
1958	1958-05-10	1958-10-12
1959	1959-04-30	1959-09-14
1960	1960-05-11	1960-10-06
1961	1961-05-10	1961-09-16
1962	1962-04-19	1962-09-27
1963	1963-05-24	1963-10-04
1964	1964-05-13	1964-09-17
1965	1965-05-30	1965-09-01
1966	1966-05-04	1966-09-23
1967	1967-05-17	1967-09-30
1968	1968-04-29	1968-09-12
1969	1969-04-06	1969-09-28
1970	1970-05-06	1970-10-05
1971	1971-05-13	1971-09-12
1972	1972-05-16	1972-09-09
1973	1973-05-19	1973-08-31
1974	1974-04-25	1974-10-02
1975	1975-06-24	1975-10-06
1976	1976-04-12	1976-09-17
1977	1977-05-09	1977-09-05
1978	1978-05-15	1978-09-10
1981	1981-04-24	1981-09-13

Every Fixed Threshold

Fixed thresholds at Miles City
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	59	87	1961	67
35 C (95 F): Days	59	39	1961	33
40 C (104 F): Days	41	9	1955	4
45 C (113 F): Days	2	1	1960	1
90 F (32.2 C): Days	59	70	1961	55
100 F (37.8 C): Days	53	20	1954	6
110 F (43.3 C): Days	6	2	1960	1
0 C (32 F): Ice days (max	59	96	1978	24
0 C (32 F): Frost days (min	79	196	1951	164
-10 C (14 F): Days with min	79	102	1978	32
-20 C (-4 F): Days with min	79	53	1916	10
-30 C (-22 F): Days with min	66	15	1929	4
-40 C (-40 F): Days with min	7	2	1916	1
20 C (68 F): Tropical nights (min	76	38	1936	1
25 C (77 F): Days with min	7	6	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	79	14	1978	6
25 mm (0.98 in): Days with 25 mm or more rain	57	5	1978	1
50 mm (1.97 in): Days with 50 mm or more rain	15	1	1921	1
10 cm (3.9 in): Days with 10 cm or more snowfall	48	5	1932	3
25 cm (9.8 in): Days with 25 cm or more snowfall	6	1	1922	1
50 cm (19.7 in): Days with 50 cm or more snowfall	2	0	n/a	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

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). Threshold counts are computed by this site.

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

Miles City Threshold Days by Year (USC00245685)

Key Facts for Miles City Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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