Sapphire Ridge weather by month
What a typical year looks like in Sapphire Ridge, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Lewistown 42 Wsw, 3 km from Sapphire Ridge; records cover 2008–2026.
The year at a glance
- Precipitation a year
- 16.8 in426 mm
- Snow a year
- Rare
- Last spring freeze
- Jun 15
- First fall freeze
- Aug 25
- Heating degree days
- 8,916
- Cooling degree days
- 45
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −19°−28° (heating, 99%) and 89°32° (cooling, 1%).
Month by month
Sapphire Ridge in January
Highs average 37°3° and lows 13°−10°, with 0.61 in15 mm of precipitation in a typical January.
- Record high
- 67°19° (2015)
- Record low
- −47°−44° (2024)
- Heating degree days
- 1243
- Cooling degree days
- 0
Sapphire Ridge in February
Highs average 36°2° and lows 12°−11°, with 0.82 in21 mm of precipitation in a typical February.
- Record high
- 68°20° (2026)
- Record low
- −39° (2021)
- Heating degree days
- 1149
- Cooling degree days
- 0
Sapphire Ridge in March
Highs average 44°6° and lows 20°−7°, with 0.86 in22 mm of precipitation in a typical March.
- Record high
- 72°22° (2026)
- Record low
- −39° (2019)
- Heating degree days
- 1037
- Cooling degree days
- 0
Sapphire Ridge in April
Highs average 50°10° and lows 25°−4°, with 1.6 in41 mm of precipitation in a typical April.
- Record high
- 80°27° (2012)
- Record low
- −18°−28° (2022)
- Heating degree days
- 832
- Cooling degree days
- 0
Sapphire Ridge in May
Highs average 60°15° and lows 33°1°, with 2.8 in72 mm of precipitation in a typical May.
- Record high
- 85°29° (2026)
- Record low
- 10°−12° (2009)
- Heating degree days
- 581
- Cooling degree days
- 0
Sapphire Ridge in June
Highs average 67°20° and lows 40°4°, with 3.1 in78 mm of precipitation in a typical June.
- Record high
- 95°35° (2021)
- Record low
- 23°−5° (2025)
- Heating degree days
- 340
- Cooling degree days
- 1
Sapphire Ridge in July
Highs average 78°25° and lows 44°7°, with 1.7 in43 mm of precipitation in a typical July.
- Record high
- 101°38° (2026)
- Record low
- 30°−1° (2018)
- Heating degree days
- 147
- Cooling degree days
- 19
Sapphire Ridge in August
Highs average 77°25° and lows 44°7°, with 1.4 in36 mm of precipitation in a typical August.
- Record high
- 97°36° (2026)
- Record low
- 23°−5° (2015)
- Heating degree days
- 158
- Cooling degree days
- 20
Sapphire Ridge in September
Highs average 69°20° and lows 36°2°, with 1.3 in34 mm of precipitation in a typical September.
- Record high
- 96°36° (2022)
- Record low
- 8°−13° (2019)
- Heating degree days
- 387
- Cooling degree days
- 4
Sapphire Ridge in OctoberThis month
Highs average 53°12° and lows 28°−2°, with 1.3 in34 mm of precipitation in a typical October.
- Record high
- 85°29° (2010)
- Record low
- −15°−26° (2023)
- Heating degree days
- 758
- Cooling degree days
- 1
Sapphire Ridge in November
Highs average 42°6° and lows 20°−6°, with 0.65 in17 mm of precipitation in a typical November.
- Record high
- 71°22° (2016)
- Record low
- −21°−29° (2014)
- Heating degree days
- 1013
- Cooling degree days
- 0
Sapphire Ridge in December
Highs average 35°2° and lows 13°−10°, with 0.55 in14 mm of precipitation in a typical December.
- Record high
- 64°18° (2020)
- Record low
- −41° (2022)
- Heating degree days
- 1271
- Cooling degree days
- 0