Ulm weather by month
What a typical year looks like in Ulm, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Great Falls Airport, 12 km from Ulm; records cover 1891–2026.
The year at a glance
- Precipitation a year
- 14.8 in375 mm
- Snow a year
- 66 in168 cm
- Last spring freeze
- May 21
- First fall freeze
- Sep 20
- Heating degree days
- 7,721
- Cooling degree days
- 310
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −17°−27° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Ulm in January
Highs average 35°2° and lows 15°−9°, with 0.55 in14 mm of precipitation and 9 in23 cm of snow in a typical January.
- Record high
- 67°19° (1992)
- Record low
- −44°−42° (1909)
- Heating degree days
- 1235
- Cooling degree days
- 0
Ulm in February
Highs average 37°3° and lows 15°−9°, with 0.59 in15 mm of precipitation and 10 in26 cm of snow in a typical February.
- Record high
- 70°21° (1932)
- Record low
- −49°−45° (1936)
- Heating degree days
- 1085
- Cooling degree days
- 0
Ulm in March
Highs average 46°8° and lows 22°−5°, with 0.68 in17 mm of precipitation and 10 in26 cm of snow in a typical March.
- Record high
- 78°26° (1978)
- Record low
- −32°−36° (1932)
- Heating degree days
- 958
- Cooling degree days
- 0
Ulm in April
Highs average 55°13° and lows 30°−1°, with 1.7 in44 mm of precipitation and 9 in24 cm of snow in a typical April.
- Record high
- 89°32° (1980)
- Record low
- −10°−23° (1936)
- Heating degree days
- 678
- Cooling degree days
- 0
Ulm in May
Highs average 65°18° and lows 38°4°, with 2.4 in62 mm of precipitation and 1.9 in4.8 cm of snow in a typical May.
- Record high
- 100°38° (1919)
- Record low
- 12°−11° (2009)
- Heating degree days
- 422
- Cooling degree days
- 3
Ulm in June
Highs average 73°23° and lows 46°8°, with 2.7 in69 mm of precipitation and 0.3 in0.8 cm of snow in a typical June.
- Record high
- 102°39° (1900)
- Record low
- 31°−1° (1950)
- Heating degree days
- 193
- Cooling degree days
- 24
Ulm in July
Highs average 84°29° and lows 51°11°, with 1.2 in31 mm of precipitation in a typical July.
- Record high
- 107°42° (1933)
- Record low
- 35°2° (1894)
- Heating degree days
- 48
- Cooling degree days
- 136
Ulm in August
Highs average 83°28° and lows 50°10°, with 1.2 in31 mm of precipitation and 0.3 in0.8 cm of snow in a typical August.
- Record high
- 106°41° (1961)
- Record low
- 30°−1° (1992)
- Heating degree days
- 66
- Cooling degree days
- 120
Ulm in September
Highs average 72°22° and lows 43°6°, with 1.3 in34 mm of precipitation and 0.8 in2 cm of snow in a typical September.
- Record high
- 102°39° (2022)
- Record low
- 10°−12° (1926)
- Heating degree days
- 258
- Cooling degree days
- 25
Ulm in OctoberThis month
Highs average 57°14° and lows 33°0°, with 1.1 in27 mm of precipitation and 5 in13 cm of snow in a typical October.
- Record high
- 91°33° (1943)
- Record low
- −11°−24° (1991)
- Heating degree days
- 628
- Cooling degree days
- 2
Ulm in November
Highs average 44°7° and lows 24°−5°, with 0.68 in17 mm of precipitation and 9 in23 cm of snow in a typical November.
- Record high
- 76°24° (1975)
- Record low
- −25°−32° (1903)
- Heating degree days
- 940
- Cooling degree days
- 0
Ulm in December
Highs average 36°2° and lows 16°−9°, with 0.53 in13 mm of precipitation and 10 in24 cm of snow in a typical December.
- Record high
- 69°21° (1939)
- Record low
- −43°−42° (1968)
- Heating degree days
- 1210
- Cooling degree days
- 0