Supreme weather by month
What a typical year looks like in Supreme, Louisiana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at DONALDSONVILLE 4 SW, 24 km from Supreme; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 63.4 in1610 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 15
- First fall freeze
- Dec 2
- Heating degree days
- 1,524
- Cooling degree days
- 2,704
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 27°−3° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Supreme in January
Highs average 62°17° and lows 42°5°, with 5.8 in147 mm of precipitation in a typical January.
- Record high
- 92°33° (1914)
- Record low
- 10°−12° (1982)
- Heating degree days
- 418
- Cooling degree days
- 12
Supreme in February
Highs average 66°19° and lows 45°7°, with 4.1 in104 mm of precipitation in a typical February.
- Record high
- 88°31° (1918)
- Record low
- 3°−16° (1899)
- Heating degree days
- 283
- Cooling degree days
- 21
Supreme in March
Highs average 72°22° and lows 51°11°, with 4 in102 mm of precipitation in a typical March.
- Record high
- 94°34° (1907)
- Record low
- 24°−4° (1996)
- Heating degree days
- 162
- Cooling degree days
- 60
Supreme in April
Highs average 78°26° and lows 57°14°, with 4.9 in124 mm of precipitation in a typical April.
- Record high
- 97°36° (1911)
- Record low
- 32°0° (1940)
- Heating degree days
- 51
- Cooling degree days
- 134
Supreme in May
Highs average 85°29° and lows 65°18°, with 5.6 in143 mm of precipitation in a typical May.
- Record high
- 100°38° (1915)
- Record low
- 41°5° (2013)
- Heating degree days
- 4
- Cooling degree days
- 314
Supreme in June
Highs average 89°32° and lows 72°22°, with 7 in177 mm of precipitation in a typical June.
- Record high
- 102°39° (1901)
- Record low
- 54°12° (1955)
- Heating degree days
- 0
- Cooling degree days
- 462
Supreme in July
Highs average 91°33° and lows 74°23°, with 6.5 in165 mm of precipitation in a typical July.
- Record high
- 102°39° (1901)
- Record low
- 59°15° (1967)
- Heating degree days
- 0
- Cooling degree days
- 528
Supreme in August
Highs average 91°33° and lows 73°23°, with 6.4 in162 mm of precipitation in a typical August.
- Record high
- 105°41° (2023)
- Record low
- 60°16° (1951)
- Heating degree days
- 0
- Cooling degree days
- 525
Supreme in September
Highs average 88°31° and lows 69°21°, with 5.4 in137 mm of precipitation in a typical September.
- Record high
- 103°39° (1927)
- Record low
- 43°6° (1909)
- Heating degree days
- 1
- Cooling degree days
- 401
Supreme in OctoberThis month
Highs average 80°27° and lows 59°15°, with 4.7 in118 mm of precipitation in a typical October.
- Record high
- 100°38° (1900)
- Record low
- 26°−3° (1952)
- Heating degree days
- 44
- Cooling degree days
- 182
Supreme in November
Highs average 71°22° and lows 49°9°, with 4.2 in107 mm of precipitation in a typical November.
- Record high
- 92°33° (1900)
- Record low
- 21°−6° (1950)
- Heating degree days
- 201
- Cooling degree days
- 44
Supreme in December
Highs average 64°18° and lows 44°7°, with 4.9 in123 mm of precipitation and 0.1 in0.3 cm of snow in a typical December.
- Record high
- 90°32° (1913)
- Record low
- 9°−13° (1989)
- Heating degree days
- 360
- Cooling degree days
- 21