Rio Grande City weather by month
What a typical year looks like in Rio Grande City, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at RIO GRANDE CITY, 1 km from Rio Grande City; records cover 1897–2026.
The year at a glance
- Precipitation a year
- 22.5 in571 mm
- Snow a year
- Rare
- Last spring freeze
- Jan 24
- First fall freeze
- Dec 13
- Heating degree days
- 796
- Cooling degree days
- 4,234
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 31°−1° (heating, 99%) and 106°41° (cooling, 1%).
Month by month
Rio Grande City in January
Highs average 71°22° and lows 45°7°, with 0.78 in20 mm of precipitation in a typical January.
- Record high
- 97°36° (1997)
- Record low
- 10°−12° (1962)
- Heating degree days
- 254
- Cooling degree days
- 36
Rio Grande City in February
Highs average 76°25° and lows 50°10°, with 0.95 in24 mm of precipitation in a typical February.
- Record high
- 104°40° (1902)
- Record low
- 15°−9° (1951)
- Heating degree days
- 135
- Cooling degree days
- 80
Rio Grande City in March
Highs average 82°28° and lows 56°13°, with 1.3 in32 mm of precipitation in a typical March.
- Record high
- 108°42° (1902)
- Record low
- 25°−4° (1971)
- Heating degree days
- 59
- Cooling degree days
- 188
Rio Grande City in April
Highs average 89°31° and lows 63°17°, with 1 in26 mm of precipitation in a typical April.
- Record high
- 112°44° (1937)
- Record low
- 25°−4° (1987)
- Heating degree days
- 10
- Cooling degree days
- 330
Rio Grande City in May
Highs average 94°34° and lows 70°21°, with 2.9 in72 mm of precipitation in a typical May.
- Record high
- 112°44° (1946)
- Record low
- 46°8° (1970)
- Heating degree days
- 0
- Cooling degree days
- 523
Rio Grande City in June
Highs average 98°37° and lows 74°24°, with 2.8 in70 mm of precipitation in a typical June.
- Record high
- 116°47° (1998)
- Record low
- 53°12° (1970)
- Heating degree days
- 0
- Cooling degree days
- 637
Rio Grande City in July
Highs average 99°37° and lows 75°24°, with 2 in52 mm of precipitation in a typical July.
- Record high
- 111°44° (1998)
- Record low
- 62°17° (1942)
- Heating degree days
- 0
- Cooling degree days
- 684
Rio Grande City in August
Highs average 99°37° and lows 75°24°, with 1.3 in34 mm of precipitation in a typical August.
- Record high
- 110°43° (1998)
- Record low
- 60°16° (1942)
- Heating degree days
- 0
- Cooling degree days
- 690
Rio Grande City in September
Highs average 94°34° and lows 71°22°, with 5.1 in130 mm of precipitation in a typical September.
- Record high
- 111°44° (2000)
- Record low
- 45°7° (1942)
- Heating degree days
- 1
- Cooling degree days
- 524
Rio Grande City in OctoberThis month
Highs average 88°31° and lows 63°17°, with 2.5 in62 mm of precipitation in a typical October.
- Record high
- 104°40° (1905)
- Record low
- 29°−2° (1993)
- Heating degree days
- 12
- Cooling degree days
- 350
Rio Grande City in November
Highs average 79°26° and lows 54°12°, with 1.1 in28 mm of precipitation in a typical November.
- Record high
- 99°37° (1946)
- Record low
- 22°−6° (1969)
- Heating degree days
- 94
- Cooling degree days
- 139
Rio Grande City in December
Highs average 72°22° and lows 47°8°, with 0.8 in20 mm of precipitation and 0.1 in0.3 cm of snow in a typical December.
- Record high
- 97°36° (1977)
- Record low
- 15°−9° (1973)
- Heating degree days
- 231
- Cooling degree days
- 53