Miles City weather by month
What a typical year looks like in Miles City, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Miles City Airport, 4 km from Miles City; records cover 1937–2026.
The year at a glance
- Precipitation a year
- 12.9 in327 mm
- Snow a year
- Rare
- Last spring freeze
- May 11
- First fall freeze
- Sep 30
- Heating degree days
- 7,565
- Cooling degree days
- 731
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −18°−28° (heating, 99%) and 101°38° (cooling, 1%).
Month by month
Miles City in January
Highs average 30°−1° and lows 9°−13°, with 0.28 in7.1 mm of precipitation in a typical January.
- Record high
- 72°22° (1992)
- Record low
- −37°−38° (1957)
- Heating degree days
- 1410
- Cooling degree days
- 0
Miles City in February
Highs average 35°2° and lows 13°−11°, with 0.26 in6.6 mm of precipitation in a typical February.
- Record high
- 73°23° (1992)
- Record low
- −37°−38° (1939)
- Heating degree days
- 1159
- Cooling degree days
- 0
Miles City in March
Highs average 47°8° and lows 23°−5°, with 0.55 in14 mm of precipitation in a typical March.
- Record high
- 83°28° (1943)
- Record low
- −31°−35° (2019)
- Heating degree days
- 941
- Cooling degree days
- 0
Miles City in April
Highs average 58°15° and lows 33°0°, with 1.5 in39 mm of precipitation in a typical April.
- Record high
- 92°33° (1980)
- Record low
- 2°−17° (2020)
- Heating degree days
- 586
- Cooling degree days
- 1
Miles City in May
Highs average 68°20° and lows 43°6°, with 2.7 in69 mm of precipitation in a typical May.
- Record high
- 100°38° (1988)
- Record low
- 15°−9° (1954)
- Heating degree days
- 310
- Cooling degree days
- 15
Miles City in June
Highs average 79°26° and lows 53°11°, with 2.5 in64 mm of precipitation in a typical June.
- Record high
- 111°44° (2012)
- Record low
- 32°0° (1943)
- Heating degree days
- 81
- Cooling degree days
- 97
Miles City in July
Highs average 89°32° and lows 60°15°, with 1.5 in38 mm of precipitation in a typical July.
- Record high
- 115°46° (2026)
- Record low
- 41°5° (1945)
- Heating degree days
- 10
- Cooling degree days
- 294
Miles City in August
Highs average 87°31° and lows 58°14°, with 0.91 in23 mm of precipitation in a typical August.
- Record high
- 110°43° (1949)
- Record low
- 35°2° (1966)
- Heating degree days
- 24
- Cooling degree days
- 256
Miles City in September
Highs average 76°24° and lows 47°8°, with 1.1 in27 mm of precipitation in a typical September.
- Record high
- 106°41° (1983)
- Record low
- 19°−7° (1995)
- Heating degree days
- 176
- Cooling degree days
- 64
Miles City in OctoberThis month
Highs average 59°15° and lows 34°1°, with 0.97 in25 mm of precipitation in a typical October.
- Record high
- 95°35° (1997)
- Record low
- −8°−22° (1991)
- Heating degree days
- 580
- Cooling degree days
- 4
Miles City in November
Highs average 44°7° and lows 21°−6°, with 0.33 in8.4 mm of precipitation in a typical November.
- Record high
- 81°27° (1999)
- Record low
- −25°−32° (1985)
- Heating degree days
- 968
- Cooling degree days
- 0
Miles City in December
Highs average 33°1° and lows 12°−11°, with 0.22 in5.6 mm of precipitation in a typical December.
- Record high
- 70°21° (2021)
- Record low
- −38°−39° (1983)
- Heating degree days
- 1320
- Cooling degree days
- 0