Mountain weather by month
What a typical year looks like in Mountain, North Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Cavalier 7nw, 23 km from Mountain; records cover 1934–2026.
The year at a glance
- Precipitation a year
- 20 in509 mm
- Snow a year
- 39 in99 cm
- Last spring freeze
- May 13
- First fall freeze
- Sep 28
- Heating degree days
- 10,021
- Cooling degree days
- 273
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −25°−32° (heating, 99%) and 89°32° (cooling, 1%).
Month by month
Mountain in January
Highs average 13°−10° and lows −4°−20°, with 0.34 in8.6 mm of precipitation and 7 in19 cm of snow in a typical January.
- Record high
- 52°11° (1942)
- Record low
- −41° (1936)
- Heating degree days
- 1877
- Cooling degree days
- 0
Mountain in February
Highs average 18°−8° and lows −1°−18°, with 0.34 in8.6 mm of precipitation and 5 in12 cm of snow in a typical February.
- Record high
- 61°16° (1958)
- Record low
- −41° (1936)
- Heating degree days
- 1582
- Cooling degree days
- 0
Mountain in March
Highs average 31°−1° and lows 13°−10°, with 0.71 in18 mm of precipitation and 6 in14 cm of snow in a typical March.
- Record high
- 78°26° (1946)
- Record low
- −31°−35° (1962)
- Heating degree days
- 1332
- Cooling degree days
- 0
Mountain in April
Highs average 49°10° and lows 29°−2°, with 1.1 in28 mm of precipitation and 3 in9 cm of snow in a typical April.
- Record high
- 97°36° (1952)
- Record low
- −10°−23° (1970)
- Heating degree days
- 783
- Cooling degree days
- 0
Mountain in May
Highs average 65°18° and lows 41°5°, with 2.9 in73 mm of precipitation and 0.9 in2.3 cm of snow in a typical May.
- Record high
- 98°37° (1964)
- Record low
- 9°−13° (1967)
- Heating degree days
- 393
- Cooling degree days
- 12
Mountain in June
Highs average 74°23° and lows 53°12°, with 3.8 in96 mm of precipitation in a typical June.
- Record high
- 105°41° (2021)
- Record low
- 28°−2° (1936)
- Heating degree days
- 112
- Cooling degree days
- 57
Mountain in July
Highs average 78°25° and lows 57°14°, with 3.4 in87 mm of precipitation in a typical July.
- Record high
- 110°43° (1936)
- Record low
- 35°2° (1983)
- Heating degree days
- 42
- Cooling degree days
- 106
Mountain in August
Highs average 77°25° and lows 54°12°, with 2.3 in57 mm of precipitation in a typical August.
- Record high
- 103°39° (1949)
- Record low
- 29°−2° (1936)
- Heating degree days
- 65
- Cooling degree days
- 79
Mountain in September
Highs average 68°20° and lows 45°7°, with 2.3 in59 mm of precipitation in a typical September.
- Record high
- 103°39° (1978)
- Record low
- 19°−7° (1942)
- Heating degree days
- 275
- Cooling degree days
- 18
Mountain in OctoberThis month
Highs average 52°11° and lows 32°0°, with 1.7 in42 mm of precipitation and 2.5 in6.4 cm of snow in a typical October.
- Record high
- 93°34° (1992)
- Record low
- −2°−19° (1991)
- Heating degree days
- 712
- Cooling degree days
- 1
Mountain in November
Highs average 34°1° and lows 17°−8°, with 0.72 in18 mm of precipitation and 6 in15 cm of snow in a typical November.
- Record high
- 75°24° (1999)
- Record low
- −33°−36° (1985)
- Heating degree days
- 1186
- Cooling degree days
- 0
Mountain in December
Highs average 20°−7° and lows 3°−16°, with 0.5 in13 mm of precipitation and 9 in22 cm of snow in a typical December.
- Record high
- 63°17° (1939)
- Record low
- −37°−38° (1967)
- Heating degree days
- 1662
- Cooling degree days
- 0