Fort Peck weather by month
What a typical year looks like in Fort Peck, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Fort Peck Power Plant, 3 km from Fort Peck; records cover 1956–2026.
The year at a glance
- Precipitation a year
- 13.6 in345 mm
- Snow a year
- Rare
- Last spring freeze
- May 11
- First fall freeze
- Sep 28
- Heating degree days
- 7,403
- Cooling degree days
- 706
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 99°37° (cooling, 1%).
Month by month
Fort Peck in January
Highs average 28°−2° and lows 8°−14°, with 0.3 in7.6 mm of precipitation in a typical January.
- Record high
- 59°15° (1997)
- Record low
- −42°−41° (1969)
- Heating degree days
- 1460
- Cooling degree days
- 0
Fort Peck in February
Highs average 33°1° and lows 12°−11°, with 0.3 in7.6 mm of precipitation in a typical February.
- Record high
- 69°21° (1992)
- Record low
- −40° (2011)
- Heating degree days
- 1193
- Cooling degree days
- 0
Fort Peck in March
Highs average 46°8° and lows 22°−5°, with 0.38 in9.7 mm of precipitation in a typical March.
- Record high
- 79°26° (1993)
- Record low
- −28°−33° (1996)
- Heating degree days
- 952
- Cooling degree days
- 0
Fort Peck in April
Highs average 60°16° and lows 34°1°, with 0.92 in23 mm of precipitation in a typical April.
- Record high
- 91°33° (1980)
- Record low
- −1°−18° (1975)
- Heating degree days
- 546
- Cooling degree days
- 1
Fort Peck in May
Highs average 71°22° and lows 44°7°, with 2.5 in64 mm of precipitation in a typical May.
- Record high
- 100°38° (1980)
- Record low
- 9°−13° (1984)
- Heating degree days
- 261
- Cooling degree days
- 20
Fort Peck in June
Highs average 80°26° and lows 53°12°, with 2.7 in68 mm of precipitation in a typical June.
- Record high
- 107°42° (1988)
- Record low
- 28°−2° (2009)
- Heating degree days
- 59
- Cooling degree days
- 98
Fort Peck in July
Highs average 89°31° and lows 59°15°, with 2.4 in61 mm of precipitation in a typical July.
- Record high
- 108°42° (2002)
- Record low
- 39°4° (1987)
- Heating degree days
- 8
- Cooling degree days
- 273
Fort Peck in August
Highs average 88°31° and lows 57°14°, with 1.4 in36 mm of precipitation in a typical August.
- Record high
- 110°43° (1995)
- Record low
- 33°1° (1994)
- Heating degree days
- 17
- Cooling degree days
- 251
Fort Peck in September
Highs average 77°25° and lows 48°9°, with 1.1 in27 mm of precipitation in a typical September.
- Record high
- 103°39° (1983)
- Record low
- 15°−9° (1995)
- Heating degree days
- 146
- Cooling degree days
- 59
Fort Peck in OctoberThis month
Highs average 61°16° and lows 37°3°, with 0.94 in24 mm of precipitation in a typical October.
- Record high
- 91°33° (2011)
- Record low
- −4°−20° (1991)
- Heating degree days
- 508
- Cooling degree days
- 4
Fort Peck in November
Highs average 44°7° and lows 24°−5°, with 0.36 in9.1 mm of precipitation in a typical November.
- Record high
- 78°26° (1999)
- Record low
- −24°−31° (1985)
- Heating degree days
- 933
- Cooling degree days
- 0
Fort Peck in December
Highs average 32°0° and lows 13°−11°, with 0.35 in8.9 mm of precipitation in a typical December.
- Record high
- 66°19° (2021)
- Record low
- −38°−39° (1990)
- Heating degree days
- 1320
- Cooling degree days
- 0