Simpson weather by month
What a typical year looks like in Simpson, Louisiana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Peason Ridge Range, 18 km from Simpson; records cover 2006–2026.
The year at a glance
- Precipitation a year
- 57.3 in1456 mm
- Snow a year
- Rare
- Last spring freeze
- Mar 3
- First fall freeze
- Nov 16
- Heating degree days
- 1,953
- Cooling degree days
- 2,522
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 25°−4° (heating, 99%) and 102°39° (cooling, 1%).
Month by month
Simpson in January
Highs average 60°16° and lows 38°3°, with 5.3 in136 mm of precipitation in a typical January.
- Record high
- 82°28° (2022)
- Record low
- 11°−12° (2024)
- Heating degree days
- 503
- Cooling degree days
- 6
Simpson in February
Highs average 64°18° and lows 41°5°, with 4.7 in119 mm of precipitation in a typical February.
- Record high
- 86°30° (2017)
- Record low
- 7°−14° (2021)
- Heating degree days
- 365
- Cooling degree days
- 12
Simpson in March
Highs average 71°22° and lows 48°9°, with 5.7 in146 mm of precipitation in a typical March.
- Record high
- 90°32° (2020)
- Record low
- 24°−4° (2015)
- Heating degree days
- 208
- Cooling degree days
- 42
Simpson in April
Highs average 78°26° and lows 55°13°, with 5.7 in145 mm of precipitation in a typical April.
- Record high
- 92°33° (2011)
- Record low
- 32°0° (2019)
- Heating degree days
- 66
- Cooling degree days
- 107
Simpson in May
Highs average 85°30° and lows 63°17°, with 4.8 in121 mm of precipitation in a typical May.
- Record high
- 97°36° (2011)
- Record low
- 40°4° (2013)
- Heating degree days
- 8
- Cooling degree days
- 286
Simpson in June
Highs average 91°33° and lows 69°21°, with 4.6 in116 mm of precipitation in a typical June.
- Record high
- 103°39° (2009)
- Record low
- 58°14° (2006)
- Heating degree days
- 0
- Cooling degree days
- 447
Simpson in July
Highs average 93°34° and lows 72°22°, with 3.9 in100 mm of precipitation in a typical July.
- Record high
- 105°41° (2022)
- Record low
- 61°16° (2008)
- Heating degree days
- 0
- Cooling degree days
- 539
Simpson in August
Highs average 94°34° and lows 71°22°, with 3.4 in85 mm of precipitation in a typical August.
- Record high
- 109°43° (2023)
- Record low
- 58°14° (2015)
- Heating degree days
- 0
- Cooling degree days
- 538
Simpson in September
Highs average 89°32° and lows 66°19°, with 4.2 in106 mm of precipitation in a typical September.
- Record high
- 105°41° (2023)
- Record low
- 45°7° (2022)
- Heating degree days
- 1
- Cooling degree days
- 371
Simpson in OctoberThis month
Highs average 80°27° and lows 55°13°, with 5 in126 mm of precipitation in a typical October.
- Record high
- 99°37° (2019)
- Record low
- 29°−2° (2017)
- Heating degree days
- 66
- Cooling degree days
- 138
Simpson in November
Highs average 69°21° and lows 45°7°, with 4.6 in117 mm of precipitation in a typical November.
- Record high
- 90°32° (2024)
- Record low
- 20°−7° (2019)
- Heating degree days
- 266
- Cooling degree days
- 26
Simpson in December
Highs average 61°16° and lows 40°4°, with 5.5 in139 mm of precipitation in a typical December.
- Record high
- 83°28° (2015)
- Record low
- 12°−11° (2022)
- Heating degree days
- 470
- Cooling degree days
- 10