Sweeny weather by month
What a typical year looks like in Sweeny, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Angleton Lake Jackson Brazoria County Airport, 24 km from Sweeny; records cover 1998–2026.
The year at a glance
- Precipitation a year
- 45.8 in1162 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 25
- First fall freeze
- Dec 2
- Heating degree days
- 1,130
- Cooling degree days
- 3,218
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 29°−2° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
Sweeny in January
Highs average 65°19° and lows 45°7°, with 4.2 in106 mm of precipitation in a typical January.
- Record high
- 84°29° (2012)
- Record low
- 18°−8° (2014)
- Heating degree days
- 332
- Cooling degree days
- 23
Sweeny in February
Highs average 69°20° and lows 49°9°, with 2.2 in57 mm of precipitation in a typical February.
- Record high
- 86°30° (2023)
- Record low
- 15°−9° (2021)
- Heating degree days
- 214
- Cooling degree days
- 39
Sweeny in March
Highs average 74°23° and lows 54°12°, with 3.1 in78 mm of precipitation in a typical March.
- Record high
- 89°32° (2008)
- Record low
- 21°−6° (2002)
- Heating degree days
- 114
- Cooling degree days
- 88
Sweeny in April
Highs average 79°26° and lows 60°16°, with 2.4 in60 mm of precipitation in a typical April.
- Record high
- 94°34° (2011)
- Record low
- 32°0° (2009)
- Heating degree days
- 31
- Cooling degree days
- 175
Sweeny in May
Highs average 86°30° and lows 68°20°, with 4.3 in109 mm of precipitation in a typical May.
- Record high
- 96°36° (1998)
- Record low
- 40°4° (2013)
- Heating degree days
- 2
- Cooling degree days
- 375
Sweeny in June
Highs average 91°33° and lows 73°23°, with 3.8 in98 mm of precipitation in a typical June.
- Record high
- 103°39° (2013)
- Record low
- 52°11° (2008)
- Heating degree days
- 0
- Cooling degree days
- 514
Sweeny in July
Highs average 93°34° and lows 75°24°, with 3.9 in99 mm of precipitation in a typical July.
- Record high
- 101°38° (2022)
- Record low
- 65°18° (2019)
- Heating degree days
- 0
- Cooling degree days
- 584
Sweeny in August
Highs average 93°34° and lows 75°24°, with 4.2 in107 mm of precipitation in a typical August.
- Record high
- 107°42° (2023)
- Record low
- 61°16° (2004)
- Heating degree days
- 0
- Cooling degree days
- 586
Sweeny in September
Highs average 89°32° and lows 71°22°, with 6 in151 mm of precipitation in a typical September.
- Record high
- 108°42° (2000)
- Record low
- 49°9° (2000)
- Heating degree days
- 0
- Cooling degree days
- 453
Sweeny in OctoberThis month
Highs average 84°29° and lows 62°17°, with 4.4 in113 mm of precipitation in a typical October.
- Record high
- 95°35° (2017)
- Record low
- 33°1° (2017)
- Heating degree days
- 20
- Cooling degree days
- 258
Sweeny in November
Highs average 74°23° and lows 53°11°, with 3.6 in91 mm of precipitation in a typical November.
- Record high
- 88°31° (2016)
- Record low
- 28°−2° (2006)
- Heating degree days
- 134
- Cooling degree days
- 86
Sweeny in December
Highs average 67°20° and lows 47°8°, with 3.7 in94 mm of precipitation in a typical December.
- Record high
- 84°29° (2015)
- Record low
- 19°−7° (2022)
- Heating degree days
- 283
- Cooling degree days
- 37