South River weather by month
What a typical year looks like in South River, New Mexico: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Farmington Four Corners Regional Airport, 16 km from South River; records cover 1941–2026.
The year at a glance
- Precipitation a year
- 7.8 in197 mm
- Snow a year
- Rare
- Last spring freeze
- May 10
- First fall freeze
- Oct 9
- Heating degree days
- 5,268
- Cooling degree days
- 995
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 5°−15° (heating, 99%) and 99°37° (cooling, 1%).
Month by month
South River in January
Highs average 43°6° and lows 19°−7°, with 0.72 in18 mm of precipitation in a typical January.
- Record high
- 66°19° (2000)
- Record low
- −20°−29° (1963)
- Heating degree days
- 1051
- Cooling degree days
- 0
South River in February
Highs average 50°10° and lows 24°−5°, with 0.65 in17 mm of precipitation in a typical February.
- Record high
- 70°21° (2009)
- Record low
- −6°−21° (2023)
- Heating degree days
- 798
- Cooling degree days
- 0
South River in March
Highs average 60°16° and lows 30°−1°, with 0.6 in15 mm of precipitation in a typical March.
- Record high
- 87°31° (2026)
- Record low
- 6°−14° (2002)
- Heating degree days
- 628
- Cooling degree days
- 0
South River in April
Highs average 67°20° and lows 35°2°, with 0.56 in14 mm of precipitation in a typical April.
- Record high
- 90°32° (1943)
- Record low
- 14°−10° (1945)
- Heating degree days
- 410
- Cooling degree days
- 0
South River in May
Highs average 77°25° and lows 44°6°, with 0.53 in13 mm of precipitation in a typical May.
- Record high
- 98°37° (2000)
- Record low
- 23°−5° (1967)
- Heating degree days
- 173
- Cooling degree days
- 31
South River in June
Highs average 89°32° and lows 53°11°, with 0.2 in5.1 mm of precipitation in a typical June.
- Record high
- 104°40° (2021)
- Record low
- 31°−1° (1950)
- Heating degree days
- 17
- Cooling degree days
- 194
South River in July
Highs average 93°34° and lows 61°16°, with 0.63 in16 mm of precipitation in a typical July.
- Record high
- 106°41° (2021)
- Record low
- 42°6° (1945)
- Heating degree days
- 0
- Cooling degree days
- 375
South River in August
Highs average 90°32° and lows 60°15°, with 0.79 in20 mm of precipitation in a typical August.
- Record high
- 102°39° (2026)
- Record low
- 40°4° (1944)
- Heating degree days
- 0
- Cooling degree days
- 298
South River in September
Highs average 82°28° and lows 51°10°, with 1.1 in27 mm of precipitation in a typical September.
- Record high
- 99°37° (1952)
- Record low
- 27°−3° (2017)
- Heating degree days
- 56
- Cooling degree days
- 94
South River in OctoberThis month
Highs average 69°20° and lows 38°3°, with 0.79 in20 mm of precipitation in a typical October.
- Record high
- 89°32° (2010)
- Record low
- 5°−15° (2019)
- Heating degree days
- 365
- Cooling degree days
- 3
South River in November
Highs average 55°13° and lows 27°−3°, with 0.66 in17 mm of precipitation in a typical November.
- Record high
- 79°26° (2009)
- Record low
- 1°−17° (1952)
- Heating degree days
- 724
- Cooling degree days
- 0
South River in December
Highs average 43°6° and lows 19°−7°, with 0.57 in14 mm of precipitation in a typical December.
- Record high
- 67°19° (1999)
- Record low
- −18°−28° (1961)
- Heating degree days
- 1046
- Cooling degree days
- 0