Seguin weather by month
What a typical year looks like in Seguin, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at New Braunfels Municipal Airport, 15 km from Seguin; records cover 1996–2026.
The year at a glance
- Precipitation a year
- 31.3 in794 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 27
- First fall freeze
- Nov 23
- Heating degree days
- 1,447
- Cooling degree days
- 3,144
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 26°−3° (heating, 99%) and 103°39° (cooling, 1%).
Month by month
Seguin in January
Highs average 64°18° and lows 40°5°, with 2.1 in54 mm of precipitation in a typical January.
- Record high
- 88°31° (2026)
- Record low
- 14°−10° (2010)
- Heating degree days
- 405
- Cooling degree days
- 10
Seguin in February
Highs average 68°20° and lows 44°7°, with 1.7 in44 mm of precipitation in a typical February.
- Record high
- 94°34° (2009)
- Record low
- 11°−12° (2021)
- Heating degree days
- 275
- Cooling degree days
- 25
Seguin in March
Highs average 75°24° and lows 51°10°, with 2.5 in63 mm of precipitation in a typical March.
- Record high
- 97°36° (2025)
- Record low
- 15°−9° (2002)
- Heating degree days
- 144
- Cooling degree days
- 74
Seguin in April
Highs average 82°28° and lows 58°14°, with 2 in51 mm of precipitation in a typical April.
- Record high
- 101°38° (2006)
- Record low
- 34°1° (2007)
- Heating degree days
- 34
- Cooling degree days
- 176
Seguin in May
Highs average 88°31° and lows 66°19°, with 3.6 in92 mm of precipitation in a typical May.
- Record high
- 103°39° (2024)
- Record low
- 39°4° (2013)
- Heating degree days
- 3
- Cooling degree days
- 362
Seguin in June
Highs average 93°34° and lows 71°22°, with 3.4 in87 mm of precipitation in a typical June.
- Record high
- 109°43° (1998)
- Record low
- 56°13° (1997)
- Heating degree days
- 0
- Cooling degree days
- 522
Seguin in July
Highs average 96°36° and lows 73°23°, with 2.2 in56 mm of precipitation in a typical July.
- Record high
- 109°43° (2020)
- Record low
- 62°17° (2013)
- Heating degree days
- 0
- Cooling degree days
- 604
Seguin in August
Highs average 98°36° and lows 73°23°, with 2 in51 mm of precipitation in a typical August.
- Record high
- 111°44° (2011)
- Record low
- 61°16° (2004)
- Heating degree days
- 0
- Cooling degree days
- 623
Seguin in September
Highs average 92°33° and lows 68°20°, with 3.5 in88 mm of precipitation in a typical September.
- Record high
- 112°44° (2000)
- Record low
- 45°7° (2000)
- Heating degree days
- 1
- Cooling degree days
- 446
Seguin in OctoberThis month
Highs average 84°29° and lows 59°15°, with 3.3 in84 mm of precipitation in a typical October.
- Record high
- 100°38° (2024)
- Record low
- 33°1° (2019)
- Heating degree days
- 32
- Cooling degree days
- 226
Seguin in November
Highs average 73°23° and lows 49°10°, with 2.5 in62 mm of precipitation in a typical November.
- Record high
- 95°35° (2017)
- Record low
- 23°−5° (2018)
- Heating degree days
- 181
- Cooling degree days
- 61
Seguin in December
Highs average 65°19° and lows 42°5°, with 2.4 in61 mm of precipitation in a typical December.
- Record high
- 89°32° (2024)
- Record low
- 16°−9° (2022)
- Heating degree days
- 372
- Cooling degree days
- 15