La Union weather by month
What a typical year looks like in La Union, New Mexico: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Santa Teresa Airport, 9 km from La Union; records cover 2002–2026.
The year at a glance
- Precipitation a year
- 10.1 in257 mm
- Snow a year
- 2 in5.1 cm
- Last spring freeze
- Mar 21
- First fall freeze
- Nov 10
- Heating degree days
- 2,753
- Cooling degree days
- 2,085
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 18°−8° (heating, 99%) and 103°40° (cooling, 1%).
Month by month
La Union in January
Highs average 58°14° and lows 30°−1°, with 0.51 in13 mm of precipitation and 0.3 in0.8 cm of snow in a typical January.
- Record high
- 73°23° (2003)
- Record low
- 9°−13° (2025)
- Heating degree days
- 662
- Cooling degree days
- 0
La Union in February
Highs average 63°17° and lows 33°0°, with 0.53 in13 mm of precipitation and 0.2 in0.5 cm of snow in a typical February.
- Record high
- 84°29° (2016)
- Record low
- −5°−21° (2011)
- Heating degree days
- 482
- Cooling degree days
- 0
La Union in March
Highs average 71°22° and lows 39°4°, with 0.26 in6.6 mm of precipitation in a typical March.
- Record high
- 95°35° (2026)
- Record low
- 15°−9° (2002)
- Heating degree days
- 308
- Cooling degree days
- 4
La Union in April
Highs average 79°26° and lows 47°8°, with 0.2 in5.1 mm of precipitation in a typical April.
- Record high
- 94°34° (2012)
- Record low
- 25°−4° (2025)
- Heating degree days
- 112
- Cooling degree days
- 40
La Union in May
Highs average 87°31° and lows 56°13°, with 0.39 in9.9 mm of precipitation in a typical May.
- Record high
- 106°41° (2005)
- Record low
- 37°3° (2010)
- Heating degree days
- 19
- Cooling degree days
- 214
La Union in June
Highs average 96°36° and lows 65°18°, with 0.82 in21 mm of precipitation in a typical June.
- Record high
- 108°42° (2017)
- Record low
- 52°11° (2007)
- Heating degree days
- 0
- Cooling degree days
- 463
La Union in July
Highs average 95°35° and lows 69°20°, with 2.3 in59 mm of precipitation in a typical July.
- Record high
- 108°42° (2020)
- Record low
- 58°14° (2015)
- Heating degree days
- 0
- Cooling degree days
- 518
La Union in August
Highs average 93°34° and lows 68°20°, with 1.7 in44 mm of precipitation in a typical August.
- Record high
- 107°42° (2023)
- Record low
- 58°14° (2004)
- Heating degree days
- 0
- Cooling degree days
- 480
La Union in September
Highs average 88°31° and lows 62°17°, with 1.5 in38 mm of precipitation in a typical September.
- Record high
- 102°39° (2023)
- Record low
- 41°5° (2013)
- Heating degree days
- 3
- Cooling degree days
- 297
La Union in OctoberThis month
Highs average 79°26° and lows 50°10°, with 0.75 in19 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 94°34° (2015)
- Record low
- 23°−5° (2019)
- Heating degree days
- 91
- Cooling degree days
- 68
La Union in November
Highs average 66°19° and lows 37°3°, with 0.47 in12 mm of precipitation and 0.2 in0.5 cm of snow in a typical November.
- Record high
- 85°29° (2023)
- Record low
- 14°−10° (2010)
- Heating degree days
- 399
- Cooling degree days
- 1
La Union in December
Highs average 57°14° and lows 30°−1°, with 0.65 in17 mm of precipitation and 1.2 in3 cm of snow in a typical December.
- Record high
- 76°24° (2025)
- Record low
- 11°−12° (2011)
- Heating degree days
- 677
- Cooling degree days
- 0