Melstone weather by month
What a typical year looks like in Melstone, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Melstone, 0 km from Melstone; records cover 1909–2026.
The year at a glance
- Precipitation a year
- 15.5 in393 mm
- Snow a year
- 43 in109 cm
- Last spring freeze
- May 11
- First fall freeze
- Sep 28
- Heating degree days
- 7,038
- Cooling degree days
- 600
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −15°−26° (heating, 99%) and 100°38° (cooling, 1%).
Month by month
Melstone in January
Highs average 35°2° and lows 14°−10°, with 0.51 in13 mm of precipitation and 9 in22 cm of snow in a typical January.
- Record high
- 70°21° (1953)
- Record low
- −43°−42° (1954)
- Heating degree days
- 1252
- Cooling degree days
- 0
Melstone in February
Highs average 38°3° and lows 17°−8°, with 0.44 in11 mm of precipitation and 7 in17 cm of snow in a typical February.
- Record high
- 77°25° (1932)
- Record low
- −51°−46° (1936)
- Heating degree days
- 1054
- Cooling degree days
- 0
Melstone in March
Highs average 49°9° and lows 25°−4°, with 0.77 in20 mm of precipitation and 7 in18 cm of snow in a typical March.
- Record high
- 82°28° (2025)
- Record low
- −35°−37° (2019)
- Heating degree days
- 879
- Cooling degree days
- 0
Melstone in April
Highs average 59°15° and lows 33°1°, with 1.8 in46 mm of precipitation and 4 in9 cm of snow in a typical April.
- Record high
- 92°33° (1939)
- Record low
- −10°−23° (1935)
- Heating degree days
- 572
- Cooling degree days
- 0
Melstone in May
Highs average 68°20° and lows 42°6°, with 2.9 in74 mm of precipitation and 1 in2.5 cm of snow in a typical May.
- Record high
- 97°36° (1934)
- Record low
- 8°−13° (1954)
- Heating degree days
- 318
- Cooling degree days
- 11
Melstone in June
Highs average 78°25° and lows 51°11°, with 2.8 in70 mm of precipitation in a typical June.
- Record high
- 108°42° (1936)
- Record low
- 23°−5° (1969)
- Heating degree days
- 91
- Cooling degree days
- 73
Melstone in July
Highs average 88°31° and lows 58°14°, with 1.5 in39 mm of precipitation in a typical July.
- Record high
- 111°44° (2002)
- Record low
- 35°2° (1951)
- Heating degree days
- 14
- Cooling degree days
- 248
Melstone in August
Highs average 87°30° and lows 56°13°, with 1.1 in28 mm of precipitation in a typical August.
- Record high
- 110°43° (1949)
- Record low
- 32°0° (1992)
- Heating degree days
- 26
- Cooling degree days
- 217
Melstone in September
Highs average 76°24° and lows 46°8°, with 1.2 in30 mm of precipitation and 0.1 in0.3 cm of snow in a typical September.
- Record high
- 106°41° (1950)
- Record low
- 18°−8° (1985)
- Heating degree days
- 176
- Cooling degree days
- 48
Melstone in OctoberThis month
Highs average 60°16° and lows 35°2°, with 1.3 in34 mm of precipitation and 2.5 in6.4 cm of snow in a typical October.
- Record high
- 99°37° (2011)
- Record low
- −9°−23° (1991)
- Heating degree days
- 550
- Cooling degree days
- 3
Melstone in November
Highs average 46°8° and lows 25°−4°, with 0.59 in15 mm of precipitation and 6 in14 cm of snow in a typical November.
- Record high
- 80°27° (1921)
- Record low
- −30°−34° (1955)
- Heating degree days
- 896
- Cooling degree days
- 0
Melstone in December
Highs average 36°2° and lows 16°−9°, with 0.53 in13 mm of precipitation and 8 in20 cm of snow in a typical December.
- Record high
- 71°22° (1939)
- Record low
- −43°−42° (1983)
- Heating degree days
- 1210
- Cooling degree days
- 0