Petersburg weather by month
What a typical year looks like in Petersburg, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Abernathy, 24 km from Petersburg; records cover 1969–2026.
The year at a glance
- Precipitation a year
- 19.2 in487 mm
- Snow a year
- 7 in17 cm
- Last spring freeze
- Apr 9
- First fall freeze
- Oct 28
- Heating degree days
- 3,640
- Cooling degree days
- 1,581
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 11°−12° (heating, 99%) and 101°38° (cooling, 1%).
Month by month
Petersburg in January
Highs average 55°13° and lows 24°−4°, with 0.7 in18 mm of precipitation and 1.4 in3.6 cm of snow in a typical January.
- Record high
- 85°29° (2006)
- Record low
- −2°−19° (2026)
- Heating degree days
- 792
- Cooling degree days
- 0
Petersburg in February
Highs average 58°15° and lows 28°−2°, with 0.69 in18 mm of precipitation and 1.6 in4.1 cm of snow in a typical February.
- Record high
- 90°32° (2025)
- Record low
- −4°−20° (2021)
- Heating degree days
- 619
- Cooling degree days
- 0
Petersburg in March
Highs average 66°19° and lows 35°2°, with 1.2 in29 mm of precipitation and 0.4 in1 cm of snow in a typical March.
- Record high
- 100°38° (2026)
- Record low
- 5°−15° (2002)
- Heating degree days
- 454
- Cooling degree days
- 4
Petersburg in April
Highs average 74°23° and lows 43°6°, with 1.3 in32 mm of precipitation and 0.1 in0.3 cm of snow in a typical April.
- Record high
- 100°38° (2012)
- Record low
- 20°−7° (2013)
- Heating degree days
- 226
- Cooling degree days
- 28
Petersburg in May
Highs average 81°27° and lows 54°12°, with 2.9 in73 mm of precipitation in a typical May.
- Record high
- 108°42° (2000)
- Record low
- 26°−3° (2013)
- Heating degree days
- 71
- Cooling degree days
- 142
Petersburg in June
Highs average 89°32° and lows 63°17°, with 2.7 in69 mm of precipitation in a typical June.
- Record high
- 110°43° (1980)
- Record low
- 49°9° (2007)
- Heating degree days
- 1
- Cooling degree days
- 337
Petersburg in July
Highs average 91°33° and lows 67°19°, with 1.9 in47 mm of precipitation in a typical July.
- Record high
- 110°43° (2020)
- Record low
- 53°12° (2005)
- Heating degree days
- 0
- Cooling degree days
- 427
Petersburg in August
Highs average 91°33° and lows 66°19°, with 2 in51 mm of precipitation in a typical August.
- Record high
- 109°43° (2026)
- Record low
- 53°12° (2017)
- Heating degree days
- 1
- Cooling degree days
- 405
Petersburg in September
Highs average 84°29° and lows 58°14°, with 2.5 in64 mm of precipitation in a typical September.
- Record high
- 104°40° (2026)
- Record low
- 35°2° (2000)
- Heating degree days
- 26
- Cooling degree days
- 196
Petersburg in OctoberThis month
Highs average 75°24° and lows 46°8°, with 1.7 in43 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 102°39° (2000)
- Record low
- 14°−10° (2019)
- Heating degree days
- 191
- Cooling degree days
- 41
Petersburg in November
Highs average 63°17° and lows 34°1°, with 0.93 in24 mm of precipitation and 1.1 in2.8 cm of snow in a typical November.
- Record high
- 88°31° (2023)
- Record low
- 9°−13° (2014)
- Heating degree days
- 498
- Cooling degree days
- 1
Petersburg in December
Highs average 55°13° and lows 26°−3°, with 0.81 in21 mm of precipitation and 1.8 in4.6 cm of snow in a typical December.
- Record high
- 84°29° (2025)
- Record low
- 0°−18° (2004)
- Heating degree days
- 761
- Cooling degree days
- 0