Richardson weather by month
What a typical year looks like in Richardson, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at DALLAS FAA AP, 19 km from Richardson; records cover 1939–2026.
The year at a glance
- Precipitation a year
- 38.3 in973 mm
- Snow a year
- 1.7 in4.3 cm
- Last spring freeze
- Mar 2
- First fall freeze
- Nov 28
- Heating degree days
- 1,992
- Cooling degree days
- 3,126
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 24°−4° (heating, 99%) and 104°40° (cooling, 1%).
Month by month
Richardson in January
Highs average 58°14° and lows 38°3°, with 2.6 in66 mm of precipitation and 0.1 in0.3 cm of snow in a typical January.
- Record high
- 88°31° (1943)
- Record low
- 0°−18° (1940)
- Heating degree days
- 537
- Cooling degree days
- 4
Richardson in February
Highs average 62°17° and lows 42°5°, with 2.8 in71 mm of precipitation and 0.9 in2.3 cm of snow in a typical February.
- Record high
- 95°35° (1996)
- Record low
- 2°−17° (2021)
- Heating degree days
- 376
- Cooling degree days
- 11
Richardson in March
Highs average 70°21° and lows 49°10°, with 3.5 in88 mm of precipitation and 0.3 in0.8 cm of snow in a typical March.
- Record high
- 97°36° (1974)
- Record low
- 11°−12° (1943)
- Heating degree days
- 213
- Cooling degree days
- 47
Richardson in April
Highs average 77°25° and lows 57°14°, with 3.2 in80 mm of precipitation in a typical April.
- Record high
- 100°38° (2006)
- Record low
- 31°−1° (1957)
- Heating degree days
- 65
- Cooling degree days
- 128
Richardson in May
Highs average 85°29° and lows 66°19°, with 4.6 in116 mm of precipitation in a typical May.
- Record high
- 103°39° (1985)
- Record low
- 39°4° (1954)
- Heating degree days
- 6
- Cooling degree days
- 330
Richardson in June
Highs average 93°34° and lows 74°23°, with 3.8 in97 mm of precipitation in a typical June.
- Record high
- 112°44° (1980)
- Record low
- 53°12° (1947)
- Heating degree days
- 0
- Cooling degree days
- 548
Richardson in July
Highs average 97°36° and lows 78°25°, with 1.7 in43 mm of precipitation in a typical July.
- Record high
- 112°44° (2018)
- Record low
- 60°16° (1940)
- Heating degree days
- 0
- Cooling degree days
- 691
Richardson in August
Highs average 97°36° and lows 77°25°, with 2.2 in56 mm of precipitation in a typical August.
- Record high
- 111°44° (2011)
- Record low
- 56°13° (1940)
- Heating degree days
- 0
- Cooling degree days
- 690
Richardson in September
Highs average 90°32° and lows 70°21°, with 3.1 in79 mm of precipitation in a typical September.
- Record high
- 110°43° (2000)
- Record low
- 36°2° (1942)
- Heating degree days
- 2
- Cooling degree days
- 454
Richardson in OctoberThis month
Highs average 80°26° and lows 59°15°, with 4.8 in122 mm of precipitation in a typical October.
- Record high
- 100°38° (1979)
- Record low
- 27°−3° (1993)
- Heating degree days
- 56
- Cooling degree days
- 183
Richardson in November
Highs average 68°20° and lows 48°9°, with 2.9 in74 mm of precipitation and 0.1 in0.3 cm of snow in a typical November.
- Record high
- 92°33° (2017)
- Record low
- 17°−8° (1950)
- Heating degree days
- 250
- Cooling degree days
- 34
Richardson in December
Highs average 59°15° and lows 40°4°, with 3.2 in82 mm of precipitation and 0.3 in0.8 cm of snow in a typical December.
- Record high
- 89°32° (1955)
- Record low
- 1°−17° (1989)
- Heating degree days
- 487
- Cooling degree days
- 6