Westminster weather by month
What a typical year looks like in Westminster, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Mckinney Municipal Airport, 24 km from Westminster; records cover 1998–2026.
The year at a glance
- Precipitation a year
- 38.3 in973 mm
- Snow a year
- Rare
- Last spring freeze
- Mar 17
- First fall freeze
- Nov 12
- Heating degree days
- 2,498
- Cooling degree days
- 2,532
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 19°−7° (heating, 99%) and 104°40° (cooling, 1%).
Month by month
Westminster in January
Highs average 56°13° and lows 34°1°, with 2.7 in69 mm of precipitation in a typical January.
- Record high
- 82°28° (2006)
- Record low
- 7°−14° (2018)
- Heating degree days
- 631
- Cooling degree days
- 2
Westminster in February
Highs average 60°15° and lows 38°3°, with 2.6 in65 mm of precipitation in a typical February.
- Record high
- 91°33° (2024)
- Record low
- −4°−20° (2021)
- Heating degree days
- 457
- Cooling degree days
- 6
Westminster in March
Highs average 68°20° and lows 46°8°, with 3.5 in89 mm of precipitation in a typical March.
- Record high
- 92°33° (2026)
- Record low
- 13°−11° (2002)
- Heating degree days
- 289
- Cooling degree days
- 25
Westminster in April
Highs average 75°24° and lows 53°12°, with 3.6 in91 mm of precipitation in a typical April.
- Record high
- 98°37° (2006)
- Record low
- 28°−2° (2009)
- Heating degree days
- 112
- Cooling degree days
- 77
Westminster in May
Highs average 83°28° and lows 62°17°, with 4.8 in121 mm of precipitation in a typical May.
- Record high
- 101°38° (2003)
- Record low
- 35°2° (2013)
- Heating degree days
- 15
- Cooling degree days
- 251
Westminster in June
Highs average 91°33° and lows 70°21°, with 3.6 in91 mm of precipitation in a typical June.
- Record high
- 104°40° (2012)
- Record low
- 54°12° (2000)
- Heating degree days
- 0
- Cooling degree days
- 463
Westminster in July
Highs average 95°35° and lows 74°23°, with 2 in50 mm of precipitation in a typical July.
- Record high
- 111°44° (1998)
- Record low
- 58°14° (2013)
- Heating degree days
- 0
- Cooling degree days
- 601
Westminster in August
Highs average 96°35° and lows 73°23°, with 1.7 in44 mm of precipitation in a typical August.
- Record high
- 109°43° (2003)
- Record low
- 54°12° (2004)
- Heating degree days
- 0
- Cooling degree days
- 598
Westminster in September
Highs average 88°31° and lows 66°19°, with 2.8 in71 mm of precipitation in a typical September.
- Record high
- 112°44° (2000)
- Record low
- 41°5° (2000)
- Heating degree days
- 4
- Cooling degree days
- 362
Westminster in OctoberThis month
Highs average 78°26° and lows 54°12°, with 4.4 in112 mm of precipitation in a typical October.
- Record high
- 97°36° (2019)
- Record low
- 28°−2° (2008)
- Heating degree days
- 90
- Cooling degree days
- 123
Westminster in November
Highs average 66°19° and lows 44°7°, with 3.2 in81 mm of precipitation in a typical November.
- Record high
- 91°33° (2017)
- Record low
- 19°−7° (2014)
- Heating degree days
- 321
- Cooling degree days
- 20
Westminster in December
Highs average 57°14° and lows 36°2°, with 3.5 in89 mm of precipitation in a typical December.
- Record high
- 86°30° (2005)
- Record low
- 6°−14° (2005)
- Heating degree days
- 579
- Cooling degree days
- 4