Arriba weather by month
What a typical year looks like in Arriba, Colorado: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at GENOA, 19 km from Arriba; records cover 1970–2026.
The year at a glance
- Precipitation a year
- 16.2 in411 mm
- Snow a year
- 35 in90 cm
- Last spring freeze
- May 11
- First fall freeze
- Oct 9
- Heating degree days
- 6,121
- Cooling degree days
- 642
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −1°−18° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Arriba in January
Highs average 42°6° and lows 21°−6°, with 0.34 in8.6 mm of precipitation and 5 in13 cm of snow in a typical January.
- Record high
- 70°21° (2009)
- Record low
- −20°−29° (1979)
- Heating degree days
- 1043
- Cooling degree days
- 0
Arriba in February
Highs average 42°6° and lows 20°−7°, with 0.35 in8.9 mm of precipitation and 5 in13 cm of snow in a typical February.
- Record high
- 76°24° (2017)
- Record low
- −23°−31° (2021)
- Heating degree days
- 947
- Cooling degree days
- 0
Arriba in March
Highs average 52°11° and lows 28°−2°, with 0.69 in18 mm of precipitation and 6 in14 cm of snow in a typical March.
- Record high
- 85°29° (2026)
- Record low
- −6°−21° (2019)
- Heating degree days
- 768
- Cooling degree days
- 0
Arriba in April
Highs average 59°15° and lows 34°1°, with 1.4 in36 mm of precipitation and 7 in18 cm of snow in a typical April.
- Record high
- 85°29° (2012)
- Record low
- 5°−15° (2013)
- Heating degree days
- 563
- Cooling degree days
- 1
Arriba in May
Highs average 69°20° and lows 43°6°, with 2.4 in60 mm of precipitation and 1.1 in2.8 cm of snow in a typical May.
- Record high
- 96°36° (2020)
- Record low
- 17°−8° (1970)
- Heating degree days
- 300
- Cooling degree days
- 22
Arriba in June
Highs average 80°27° and lows 53°12°, with 2.4 in62 mm of precipitation in a typical June.
- Record high
- 102°39° (2012)
- Record low
- 34°1° (2020)
- Heating degree days
- 64
- Cooling degree days
- 112
Arriba in July
Highs average 86°30° and lows 59°15°, with 3 in76 mm of precipitation in a typical July.
- Record high
- 101°38° (2005)
- Record low
- 40°4° (1971)
- Heating degree days
- 8
- Cooling degree days
- 249
Arriba in August
Highs average 83°29° and lows 58°14°, with 3 in75 mm of precipitation in a typical August.
- Record high
- 101°38° (2022)
- Record low
- 40°4° (1972)
- Heating degree days
- 18
- Cooling degree days
- 187
Arriba in September
Highs average 76°24° and lows 50°10°, with 1 in25 mm of precipitation and 0.4 in1 cm of snow in a typical September.
- Record high
- 98°37° (2020)
- Record low
- 22°−6° (1971)
- Heating degree days
- 129
- Cooling degree days
- 65
Arriba in OctoberThis month
Highs average 63°17° and lows 38°3°, with 1.1 in28 mm of precipitation and 2.5 in6.4 cm of snow in a typical October.
- Record high
- 90°32° (2018)
- Record low
- 2°−17° (2019)
- Heating degree days
- 448
- Cooling degree days
- 6
Arriba in November
Highs average 50°10° and lows 28°−2°, with 0.34 in8.6 mm of precipitation and 5 in11 cm of snow in a typical November.
- Record high
- 79°26° (2016)
- Record low
- −8°−22° (2014)
- Heating degree days
- 782
- Cooling degree days
- 0
Arriba in December
Highs average 41°5° and lows 21°−6°, with 0.18 in4.6 mm of precipitation and 4 in10 cm of snow in a typical December.
- Record high
- 72°22° (2025)
- Record low
- −15°−26° (2022)
- Heating degree days
- 1051
- Cooling degree days
- 0
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