Twodot weather by month
What a typical year looks like in Twodot, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Harlowton, 18 km from Twodot; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 13.2 in335 mm
- Snow a year
- 20 in50 cm
- Last spring freeze
- May 25
- First fall freeze
- Sep 17
- Heating degree days
- 7,934
- Cooling degree days
- 230
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 95°35° (cooling, 1%).
Month by month
Twodot in January
Highs average 36°2° and lows 13°−10°, with 0.31 in7.9 mm of precipitation and 4 in9 cm of snow in a typical January.
- Record high
- 69°21° (1981)
- Record low
- −41° (2024)
- Heating degree days
- 1256
- Cooling degree days
- 0
Twodot in February
Highs average 38°3° and lows 14°−10°, with 0.3 in7.6 mm of precipitation and 1.9 in4.8 cm of snow in a typical February.
- Record high
- 74°23° (1950)
- Record low
- −39° (1949)
- Heating degree days
- 1088
- Cooling degree days
- 0
Twodot in March
Highs average 48°9° and lows 20°−7°, with 0.55 in14 mm of precipitation and 2.6 in6.6 cm of snow in a typical March.
- Record high
- 78°26° (2026)
- Record low
- −29°−34° (1951)
- Heating degree days
- 972
- Cooling degree days
- 0
Twodot in April
Highs average 54°12° and lows 28°−2°, with 1.3 in34 mm of precipitation and 3 in8 cm of snow in a typical April.
- Record high
- 87°31° (1952)
- Record low
- −6°−21° (2022)
- Heating degree days
- 718
- Cooling degree days
- 0
Twodot in May
Highs average 64°18° and lows 37°3°, with 2.5 in64 mm of precipitation and 0.3 in0.8 cm of snow in a typical May.
- Record high
- 91°33° (1954)
- Record low
- 4°−16° (1953)
- Heating degree days
- 445
- Cooling degree days
- 2
Twodot in June
Highs average 74°23° and lows 46°8°, with 2.8 in71 mm of precipitation in a typical June.
- Record high
- 99°37° (2012)
- Record low
- 24°−4° (1953)
- Heating degree days
- 185
- Cooling degree days
- 21
Twodot in July
Highs average 84°29° and lows 50°10°, with 1.4 in36 mm of precipitation in a typical July.
- Record high
- 106°41° (2026)
- Record low
- 33°1° (1949)
- Heating degree days
- 46
- Cooling degree days
- 105
Twodot in August
Highs average 83°28° and lows 48°9°, with 1.3 in32 mm of precipitation in a typical August.
- Record high
- 102°39° (2026)
- Record low
- 24°−4° (1992)
- Heating degree days
- 65
- Cooling degree days
- 90
Twodot in September
Highs average 73°23° and lows 40°4°, with 1.1 in27 mm of precipitation and 0.1 in0.3 cm of snow in a typical September.
- Record high
- 100°38° (2022)
- Record low
- 10°−12° (1950)
- Heating degree days
- 281
- Cooling degree days
- 12
Twodot in OctoberThis month
Highs average 57°14° and lows 30°−1°, with 0.68 in17 mm of precipitation and 0.6 in1.5 cm of snow in a typical October.
- Record high
- 90°32° (1992)
- Record low
- −8°−22° (1991)
- Heating degree days
- 668
- Cooling degree days
- 0
Twodot in November
Highs average 45°7° and lows 21°−6°, with 0.51 in13 mm of precipitation and 4 in9 cm of snow in a typical November.
- Record high
- 78°26° (1949)
- Record low
- −29°−34° (1959)
- Heating degree days
- 972
- Cooling degree days
- 0
Twodot in December
Highs average 35°2° and lows 15°−10°, with 0.41 in10 mm of precipitation and 4 in9 cm of snow in a typical December.
- Record high
- 66°19° (2021)
- Record low
- −39° (1964)
- Heating degree days
- 1238
- Cooling degree days
- 0