Sentinel Butte weather by month
What a typical year looks like in Sentinel Butte, North Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Medora, 24 km from Sentinel Butte; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 15.8 in401 mm
- Snow a year
- 30 in76 cm
- Last spring freeze
- May 20
- First fall freeze
- Sep 22
- Heating degree days
- 8,420
- Cooling degree days
- 485
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −23°−31° (heating, 99%) and 99°37° (cooling, 1%).
Month by month
Sentinel Butte in January
Highs average 28°−2° and lows 3°−16°, with 0.32 in8.1 mm of precipitation and 4 in11 cm of snow in a typical January.
- Record high
- 66°19° (1981)
- Record low
- −49°−45° (1950)
- Heating degree days
- 1534
- Cooling degree days
- 0
Sentinel Butte in February
Highs average 32°0° and lows 8°−13°, with 0.44 in11 mm of precipitation and 7 in18 cm of snow in a typical February.
- Record high
- 70°21° (1992)
- Record low
- −47°−44° (1962)
- Heating degree days
- 1266
- Cooling degree days
- 0
Sentinel Butte in March
Highs average 44°7° and lows 18°−8°, with 0.63 in16 mm of precipitation and 4 in10 cm of snow in a typical March.
- Record high
- 82°28° (2015)
- Record low
- −34°−37° (1998)
- Heating degree days
- 1052
- Cooling degree days
- 0
Sentinel Butte in April
Highs average 56°13° and lows 30°−1°, with 1.6 in40 mm of precipitation and 3 in9 cm of snow in a typical April.
- Record high
- 95°35° (1980)
- Record low
- −13°−25° (1975)
- Heating degree days
- 676
- Cooling degree days
- 0
Sentinel Butte in May
Highs average 67°19° and lows 41°5°, with 2.6 in66 mm of precipitation and 0.4 in1 cm of snow in a typical May.
- Record high
- 101°38° (1980)
- Record low
- 8°−13° (1967)
- Heating degree days
- 363
- Cooling degree days
- 10
Sentinel Butte in June
Highs average 77°25° and lows 50°10°, with 2.9 in74 mm of precipitation in a typical June.
- Record high
- 107°42° (1988)
- Record low
- 28°−2° (1950)
- Heating degree days
- 110
- Cooling degree days
- 62
Sentinel Butte in July
Highs average 86°30° and lows 56°13°, with 2.1 in53 mm of precipitation in a typical July.
- Record high
- 110°43° (1981)
- Record low
- 34°1° (1968)
- Heating degree days
- 22
- Cooling degree days
- 200
Sentinel Butte in August
Highs average 85°30° and lows 53°12°, with 1.4 in36 mm of precipitation in a typical August.
- Record high
- 110°43° (1949)
- Record low
- 28°−2° (1964)
- Heating degree days
- 43
- Cooling degree days
- 173
Sentinel Butte in September
Highs average 74°24° and lows 43°6°, with 1.4 in36 mm of precipitation and 0.1 in0.3 cm of snow in a typical September.
- Record high
- 106°41° (1976)
- Record low
- 13°−11° (1949)
- Heating degree days
- 230
- Cooling degree days
- 38
Sentinel Butte in OctoberThis month
Highs average 58°14° and lows 30°−1°, with 1.2 in30 mm of precipitation and 1.8 in4.6 cm of snow in a typical October.
- Record high
- 95°35° (1953)
- Record low
- −13°−25° (1991)
- Heating degree days
- 659
- Cooling degree days
- 2
Sentinel Butte in November
Highs average 42°6° and lows 18°−8°, with 0.62 in16 mm of precipitation and 3 in8 cm of snow in a typical November.
- Record high
- 83°28° (1999)
- Record low
- −31°−35° (1985)
- Heating degree days
- 1042
- Cooling degree days
- 0
Sentinel Butte in December
Highs average 31°−1° and lows 7°−14°, with 0.56 in14 mm of precipitation and 6 in15 cm of snow in a typical December.
- Record high
- 66°19° (1979)
- Record low
- −44°−42° (1983)
- Heating degree days
- 1423
- Cooling degree days
- 0