Brockton weather by month
What a typical year looks like in Brockton, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Wolf Point 29 Ene, 22 km from Brockton; records cover 2001–2026.
The year at a glance
- Precipitation a year
- 14.2 in360 mm
- Snow a year
- Rare
- Last spring freeze
- May 20
- First fall freeze
- Sep 13
- Heating degree days
- 9,210
- Cooling degree days
- 331
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −28°−33° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
Brockton in January
Highs average 23°−5° and lows 0°−18°, with 0.43 in11 mm of precipitation in a typical January.
- Record high
- 60°16° (2002)
- Record low
- −43°−42° (2018)
- Heating degree days
- 1654
- Cooling degree days
- 0
Brockton in February
Highs average 28°−2° and lows 5°−15°, with 0.3 in7.6 mm of precipitation in a typical February.
- Record high
- 66°19° (2002)
- Record low
- −47°−44° (2019)
- Heating degree days
- 1368
- Cooling degree days
- 0
Brockton in March
Highs average 40°5° and lows 16°−9°, with 0.59 in15 mm of precipitation in a typical March.
- Record high
- 80°27° (2004)
- Record low
- −32°−36° (2003)
- Heating degree days
- 1139
- Cooling degree days
- 0
Brockton in April
Highs average 56°13° and lows 27°−3°, with 1 in26 mm of precipitation in a typical April.
- Record high
- 89°32° (2026)
- Record low
- −6°−21° (2018)
- Heating degree days
- 702
- Cooling degree days
- 0
Brockton in May
Highs average 67°19° and lows 38°3°, with 2.2 in56 mm of precipitation in a typical May.
- Record high
- 98°37° (2026)
- Record low
- 8°−13° (2005)
- Heating degree days
- 398
- Cooling degree days
- 7
Brockton in June
Highs average 76°24° and lows 48°9°, with 2.9 in75 mm of precipitation in a typical June.
- Record high
- 98°37° (2002)
- Record low
- 28°−2° (2009)
- Heating degree days
- 137
- Cooling degree days
- 35
Brockton in July
Highs average 84°29° and lows 53°12°, with 2.6 in65 mm of precipitation in a typical July.
- Record high
- 111°44° (2007)
- Record low
- 35°2° (2023)
- Heating degree days
- 36
- Cooling degree days
- 136
Brockton in August
Highs average 84°29° and lows 51°11°, with 1.4 in35 mm of precipitation in a typical August.
- Record high
- 106°41° (2018)
- Record low
- 32°0° (2015)
- Heating degree days
- 59
- Cooling degree days
- 130
Brockton in September
Highs average 73°23° and lows 40°5°, with 1.1 in27 mm of precipitation in a typical September.
- Record high
- 101°38° (2004)
- Record low
- 14°−10° (2003)
- Heating degree days
- 283
- Cooling degree days
- 22
Brockton in OctoberThis month
Highs average 56°13° and lows 27°−3°, with 0.87 in22 mm of precipitation in a typical October.
- Record high
- 90°32° (2021)
- Record low
- −7°−22° (2020)
- Heating degree days
- 725
- Cooling degree days
- 1
Brockton in November
Highs average 39°4° and lows 14°−10°, with 0.43 in11 mm of precipitation in a typical November.
- Record high
- 73°23° (2020)
- Record low
- −27°−33° (2025)
- Heating degree days
- 1155
- Cooling degree days
- 0
Brockton in December
Highs average 27°−3° and lows 3°−16°, with 0.39 in9.9 mm of precipitation in a typical December.
- Record high
- 61°16° (2021)
- Record low
- −41° (2017)
- Heating degree days
- 1554
- Cooling degree days
- 0