Argenta weather by month
What a typical year looks like in Argenta, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Dillon Airport, 24 km from Argenta; records cover 1940–2026.
The year at a glance
- Precipitation a year
- 9.8 in250 mm
- Snow a year
- Rare
- Last spring freeze
- Jun 4
- First fall freeze
- Sep 18
- Heating degree days
- 8,543
- Cooling degree days
- 117
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −12°−24° (heating, 99%) and 93°34° (cooling, 1%).
Month by month
Argenta in January
Highs average 32°0° and lows 13°−11°, with 0.2 in5.1 mm of precipitation in a typical January.
- Record high
- 58°14° (1981)
- Record low
- −41° (2024)
- Heating degree days
- 1324
- Cooling degree days
- 0
Argenta in February
Highs average 35°2° and lows 14°−10°, with 0.24 in6.1 mm of precipitation in a typical February.
- Record high
- 64°18° (1986)
- Record low
- −34°−37° (1989)
- Heating degree days
- 1134
- Cooling degree days
- 0
Argenta in March
Highs average 45°7° and lows 21°−6°, with 0.52 in13 mm of precipitation in a typical March.
- Record high
- 79°26° (1986)
- Record low
- −23°−31° (2019)
- Heating degree days
- 986
- Cooling degree days
- 0
Argenta in April
Highs average 53°11° and lows 28°−2°, with 1.2 in30 mm of precipitation in a typical April.
- Record high
- 85°29° (1987)
- Record low
- −5°−21° (1982)
- Heating degree days
- 747
- Cooling degree days
- 0
Argenta in May
Highs average 62°17° and lows 36°2°, with 1.8 in45 mm of precipitation in a typical May.
- Record high
- 90°32° (1954)
- Record low
- 14°−10° (1954)
- Heating degree days
- 496
- Cooling degree days
- 0
Argenta in June
Highs average 71°22° and lows 42°6°, with 1.9 in49 mm of precipitation in a typical June.
- Record high
- 98°37° (2015)
- Record low
- 25°−4° (1951)
- Heating degree days
- 262
- Cooling degree days
- 8
Argenta in July
Highs average 82°28° and lows 48°9°, with 0.89 in23 mm of precipitation in a typical July.
- Record high
- 102°39° (2002)
- Record low
- 32°0° (1981)
- Heating degree days
- 63
- Cooling degree days
- 60
Argenta in August
Highs average 81°27° and lows 46°8°, with 0.87 in22 mm of precipitation in a typical August.
- Record high
- 102°39° (1940)
- Record low
- 30°−1° (1956)
- Heating degree days
- 92
- Cooling degree days
- 43
Argenta in September
Highs average 70°21° and lows 39°4°, with 0.91 in23 mm of precipitation in a typical September.
- Record high
- 97°36° (2022)
- Record low
- 10°−12° (1983)
- Heating degree days
- 316
- Cooling degree days
- 6
Argenta in OctoberThis month
Highs average 55°13° and lows 29°−2°, with 0.72 in18 mm of precipitation in a typical October.
- Record high
- 86°30° (2010)
- Record low
- −9°−23° (2020)
- Heating degree days
- 707
- Cooling degree days
- 0
Argenta in November
Highs average 41°5° and lows 19°−7°, with 0.37 in9.4 mm of precipitation in a typical November.
- Record high
- 71°22° (1965)
- Record low
- −29°−34° (1955)
- Heating degree days
- 1054
- Cooling degree days
- 0
Argenta in December
Highs average 31°−1° and lows 12°−11°, with 0.26 in6.6 mm of precipitation in a typical December.
- Record high
- 62°17° (2021)
- Record low
- −37°−38° (1983)
- Heating degree days
- 1362
- Cooling degree days
- 0