McAllen weather by month
What a typical year looks like in McAllen, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Mcallen Miller International Airport, 5 km from McAllen; records cover 1941–2026.
The year at a glance
- Precipitation a year
- 22.2 in563 mm
- Snow a year
- Rare
- Last spring freeze
- Jan 14
- First fall freeze
- Rare
- Heating degree days
- 453
- Cooling degree days
- 4,990
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 37°3° (heating, 99%) and 104°40° (cooling, 1%).
Month by month
McAllen in January
Highs average 73°23° and lows 53°12°, with 0.77 in20 mm of precipitation in a typical January.
- Record high
- 96°36° (2017)
- Record low
- 13°−11° (1962)
- Heating degree days
- 150
- Cooling degree days
- 81
McAllen in February
Highs average 77°25° and lows 57°14°, with 0.72 in18 mm of precipitation in a typical February.
- Record high
- 101°38° (2009)
- Record low
- 19°−7° (1951)
- Heating degree days
- 79
- Cooling degree days
- 139
McAllen in March
Highs average 83°28° and lows 63°17°, with 1.4 in35 mm of precipitation in a typical March.
- Record high
- 105°41° (1984)
- Record low
- 31°−1° (1951)
- Heating degree days
- 28
- Cooling degree days
- 274
McAllen in April
Highs average 88°31° and lows 68°20°, with 1.4 in36 mm of precipitation in a typical April.
- Record high
- 109°43° (2022)
- Record low
- 40°4° (1944)
- Heating degree days
- 5
- Cooling degree days
- 406
McAllen in May
Highs average 93°34° and lows 74°23°, with 2 in52 mm of precipitation in a typical May.
- Record high
- 111°44° (2024)
- Record low
- 50°10° (1944)
- Heating degree days
- 0
- Cooling degree days
- 577
McAllen in June
Highs average 97°36° and lows 78°26°, with 3.1 in77 mm of precipitation in a typical June.
- Record high
- 111°44° (2017)
- Record low
- 59°15° (1970)
- Heating degree days
- 0
- Cooling degree days
- 681
McAllen in July
Highs average 99°37° and lows 79°26°, with 2 in52 mm of precipitation in a typical July.
- Record high
- 109°43° (2009)
- Record low
- 65°18° (1945)
- Heating degree days
- 0
- Cooling degree days
- 733
McAllen in August
Highs average 100°38° and lows 79°26°, with 1.8 in46 mm of precipitation in a typical August.
- Record high
- 108°42° (1988)
- Record low
- 64°18° (1946)
- Heating degree days
- 0
- Cooling degree days
- 752
McAllen in September
Highs average 94°35° and lows 76°24°, with 4.6 in117 mm of precipitation in a typical September.
- Record high
- 108°42° (2011)
- Record low
- 50°10° (1942)
- Heating degree days
- 0
- Cooling degree days
- 599
McAllen in OctoberThis month
Highs average 89°32° and lows 69°20°, with 2.1 in53 mm of precipitation in a typical October.
- Record high
- 104°40° (2012)
- Record low
- 41°5° (1993)
- Heating degree days
- 4
- Cooling degree days
- 438
McAllen in November
Highs average 80°27° and lows 60°16°, with 1.2 in30 mm of precipitation in a typical November.
- Record high
- 102°39° (1988)
- Record low
- 30°−1° (1959)
- Heating degree days
- 51
- Cooling degree days
- 206
McAllen in December
Highs average 74°23° and lows 54°12°, with 1.1 in27 mm of precipitation in a typical December.
- Record high
- 96°36° (1977)
- Record low
- 18°−8° (1989)
- Heating degree days
- 136
- Cooling degree days
- 104