Rockwall weather by month
What a typical year looks like in Rockwall, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. No nearby active station has official 1991–2020 normals, so these are forecast.blue’s own averages computed from daily observations at Ralph M Hall Rockwall Municipal Airport, 1 km from Rockwall, over its available record (2012–2026) — not an NCEI normal; records cover 2012–2026.
The year at a glance
- Precipitation a year
- 32.8 in833 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 27
- First fall freeze
- Nov 30
- Heating degree days
- —
- Cooling degree days
- —
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 21°−6° (heating, 99%) and 102°39° (cooling, 1%).
Month by month
Rockwall in January
Highs average 56°13° and lows 36°2°, with 1.7 in43 mm of precipitation in a typical January.
- Record high
- 81°27° (2023)
- Record low
- 10°−12° (2024)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in February
Highs average 61°16° and lows 40°5°, with 2.1 in53 mm of precipitation in a typical February.
- Record high
- 88°31° (2024)
- Record low
- −1°−18° (2021)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in March
Highs average 70°21° and lows 49°9°, with 2.8 in71 mm of precipitation in a typical March.
- Record high
- 91°33° (2026)
- Record low
- 17°−8° (2014)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in April
Highs average 75°24° and lows 55°13°, with 3.6 in91 mm of precipitation in a typical April.
- Record high
- 93°34° (2020)
- Record low
- 33°1° (2014)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in May
Highs average 82°28° and lows 64°18°, with 4.9 in124 mm of precipitation in a typical May.
- Record high
- 94°34° (2018)
- Record low
- 39°4° (2013)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in June
Highs average 91°33° and lows 72°22°, with 3.1 in79 mm of precipitation in a typical June.
- Record high
- 100°38° (2013)
- Record low
- 60°16° (2015)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in July
Highs average 94°35° and lows 75°24°, with 1.7 in43 mm of precipitation in a typical July.
- Record high
- 106°41° (2018)
- Record low
- 62°17° (2013)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in August
Highs average 95°35° and lows 75°24°, with 2.1 in53 mm of precipitation in a typical August.
- Record high
- 108°42° (2023)
- Record low
- 63°17° (2013)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in September
Highs average 90°32° and lows 69°21°, with 2 in51 mm of precipitation in a typical September.
- Record high
- 107°42° (2023)
- Record low
- 53°12° (2020)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in OctoberThis month
Highs average 79°26° and lows 58°14°, with 4.2 in107 mm of precipitation in a typical October.
- Record high
- 95°35° (2015)
- Record low
- 30°−1° (2019)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in November
Highs average 67°20° and lows 48°9°, with 2.3 in58 mm of precipitation in a typical November.
- Record high
- 91°33° (2017)
- Record low
- 22°−6° (2019)
- Heating degree days
- —
- Cooling degree days
- —
Rockwall in December
Highs average 60°16° and lows 42°5°, with 2.3 in58 mm of precipitation in a typical December.
- Record high
- 83°28° (2025)
- Record low
- 10°−12° (2022)
- Heating degree days
- —
- Cooling degree days
- —
Lavon Dam station, 1953–2019: records and averages
This station is no longer reporting, but its 1953–2019 record is the longest and most local history available. These are its own averages over its own period of record — not NCEI normals, and not the same station as the computed averages above.
January
Average high 54°12°, low 31°0°, 2.3 in58 mm precipitation.
Record high 84°29° (1957); record low 3°−16° (1964).
February
Average high 59°15°, low 36°2°, 2.6 in66 mm precipitation.
Record high 96°36° (1996); record low 7°−14° (1996).
March
Average high 66°19°, low 44°6°, 3.2 in81 mm precipitation.
Record high 95°35° (1956); record low 12°−11° (1989).
April
Average high 75°24°, low 53°12°, 4 in102 mm precipitation.
Record high 97°36° (2006); record low 28°−2° (1989).
May
Average high 82°28°, low 62°17°, 5.1 in130 mm precipitation.
Record high 99°37° (2003); record low 37°3° (2013).
June
Average high 90°32°, low 69°21°, 3.8 in97 mm precipitation.
Record high 111°44° (1998); record low 49°9° (1989).
July
Average high 94°35°, low 73°23°, 2.2 in56 mm precipitation.
Record high 109°43° (1954); record low 58°14° (1990).
August
Average high 95°35°, low 72°22°, 1.9 in48 mm precipitation.
Record high 108°42° (1956); record low 48°9° (2015).
September
Average high 88°31°, low 65°18°, 3.5 in89 mm precipitation.
Record high 111°44° (2000); record low 36°2° (2000).
October
Average high 78°26°, low 54°12°, 3.9 in99 mm precipitation.
Record high 100°38° (1953); record low 26°−3° (1993).
November
Average high 67°19°, low 44°6°, 3 in76 mm precipitation.
Record high 88°31° (1988); record low 14°−10° (1976).
December
Average high 57°14°, low 35°2°, 2.8 in71 mm precipitation.
Record high 87°31° (1955); record low −3°−19° (1989).