Rio Grande weather by month
What a typical year looks like in Rio Grande, New Jersey: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Cape May 2 NW, 9 km from Rio Grande; records cover 1877–2025.
The year at a glance
- Precipitation a year
- 43.8 in1114 mm
- Snow a year
- 15 in38 cm
- Last spring freeze
- Apr 5
- First fall freeze
- Nov 9
- Heating degree days
- 4,331
- Cooling degree days
- 1,176
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 14°−10° (heating, 99%) and 93°34° (cooling, 1%).
Month by month
Rio Grande in January
Highs average 43°6° and lows 29°−2°, with 3.2 in82 mm of precipitation and 5 in11 cm of snow in a typical January.
- Record high
- 73°23° (2002)
- Record low
- −2°−19° (1982)
- Heating degree days
- 902
- Cooling degree days
- 0
Rio Grande in February
Highs average 45°7° and lows 29°−1°, with 3 in75 mm of precipitation and 6 in14 cm of snow in a typical February.
- Record high
- 75°24° (2018)
- Record low
- −3°−19° (1899)
- Heating degree days
- 776
- Cooling degree days
- 0
Rio Grande in March
Highs average 52°11° and lows 35°2°, with 4.1 in104 mm of precipitation and 2.5 in6.4 cm of snow in a typical March.
- Record high
- 82°28° (1990)
- Record low
- 7°−14° (2007)
- Heating degree days
- 665
- Cooling degree days
- 0
Rio Grande in April
Highs average 62°17° and lows 44°7°, with 3.3 in85 mm of precipitation and 0.1 in0.3 cm of snow in a typical April.
- Record high
- 91°33° (2009)
- Record low
- 16°−9° (1923)
- Heating degree days
- 367
- Cooling degree days
- 6
Rio Grande in May
Highs average 71°22° and lows 54°12°, with 3.6 in90 mm of precipitation in a typical May.
- Record high
- 95°35° (1991)
- Record low
- 33°1° (1992)
- Heating degree days
- 133
- Cooling degree days
- 49
Rio Grande in June
Highs average 80°27° and lows 63°17°, with 3.5 in90 mm of precipitation in a typical June.
- Record high
- 99°37° (1963)
- Record low
- 40°4° (1884)
- Heating degree days
- 13
- Cooling degree days
- 210
Rio Grande in July
Highs average 86°30° and lows 68°20°, with 3.9 in99 mm of precipitation in a typical July.
- Record high
- 102°39° (2011)
- Record low
- 51°11° (1962)
- Heating degree days
- 0
- Cooling degree days
- 369
Rio Grande in August
Highs average 84°29° and lows 67°20°, with 4 in102 mm of precipitation in a typical August.
- Record high
- 100°38° (1918)
- Record low
- 45°7° (1986)
- Heating degree days
- 0
- Cooling degree days
- 334
Rio Grande in September
Highs average 79°26° and lows 62°17°, with 3.8 in96 mm of precipitation in a typical September.
- Record high
- 96°36° (1953)
- Record low
- 32°0° (1967)
- Heating degree days
- 22
- Cooling degree days
- 177
Rio Grande in OctoberThis month
Highs average 68°20° and lows 51°10°, with 4.2 in106 mm of precipitation in a typical October.
- Record high
- 96°36° (2019)
- Record low
- 26°−3° (1950)
- Heating degree days
- 207
- Cooling degree days
- 30
Rio Grande in November
Highs average 57°14° and lows 41°5°, with 3.3 in84 mm of precipitation in a typical November.
- Record high
- 83°28° (1950)
- Record low
- 14°−10° (1947)
- Heating degree days
- 488
- Cooling degree days
- 1
Rio Grande in December
Highs average 48°9° and lows 33°1°, with 4 in102 mm of precipitation and 2 in5.1 cm of snow in a typical December.
- Record high
- 76°24° (1998)
- Record low
- −2°−19° (1917)
- Heating degree days
- 758
- Cooling degree days
- 0