Holly weather by month
What a typical year looks like in Holly, Colorado: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at HOLLY, 1 km from Holly; records cover 1900–2026.
The year at a glance
- Precipitation a year
- 17.2 in438 mm
- Snow a year
- 22 in55 cm
- Last spring freeze
- May 1
- First fall freeze
- Oct 9
- Heating degree days
- 5,439
- Cooling degree days
- 1,198
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 103°39° (cooling, 1%).
Month by month
Holly in January
Highs average 46°8° and lows 15°−9°, with 0.39 in9.9 mm of precipitation and 4 in11 cm of snow in a typical January.
- Record high
- 79°26° (1956)
- Record low
- −28°−33° (1949)
- Heating degree days
- 1070
- Cooling degree days
- 0
Holly in February
Highs average 50°10° and lows 18°−8°, with 0.34 in8.6 mm of precipitation and 3 in9 cm of snow in a typical February.
- Record high
- 88°31° (2016)
- Record low
- −25°−32° (2021)
- Heating degree days
- 871
- Cooling degree days
- 0
Holly in March
Highs average 60°16° and lows 26°−3°, with 0.88 in22 mm of precipitation and 5 in12 cm of snow in a typical March.
- Record high
- 96°36° (1907)
- Record low
- −22°−30° (1960)
- Heating degree days
- 674
- Cooling degree days
- 0
Holly in April
Highs average 68°20° and lows 34°1°, with 1.5 in37 mm of precipitation and 1.4 in3.6 cm of snow in a typical April.
- Record high
- 99°37° (1992)
- Record low
- 7°−14° (1936)
- Heating degree days
- 415
- Cooling degree days
- 4
Holly in May
Highs average 78°26° and lows 46°8°, with 2.2 in55 mm of precipitation and 0.7 in1.8 cm of snow in a typical May.
- Record high
- 107°42° (1996)
- Record low
- 10°−12° (1909)
- Heating degree days
- 160
- Cooling degree days
- 63
Holly in June
Highs average 89°32° and lows 56°13°, with 2.5 in64 mm of precipitation in a typical June.
- Record high
- 110°43° (1952)
- Record low
- 31°−1° (1917)
- Heating degree days
- 17
- Cooling degree days
- 246
Holly in July
Highs average 93°34° and lows 63°17°, with 3 in76 mm of precipitation in a typical July.
- Record high
- 110°43° (1953)
- Record low
- 40°4° (1905)
- Heating degree days
- 1
- Cooling degree days
- 406
Holly in August
Highs average 91°33° and lows 61°16°, with 2.9 in73 mm of precipitation in a typical August.
- Record high
- 109°43° (1962)
- Record low
- 38°3° (1910)
- Heating degree days
- 3
- Cooling degree days
- 336
Holly in September
Highs average 83°28° and lows 51°11°, with 1.2 in30 mm of precipitation in a typical September.
- Record high
- 105°41° (1955)
- Record low
- 19°−7° (1984)
- Heating degree days
- 72
- Cooling degree days
- 133
Holly in OctoberThis month
Highs average 71°21° and lows 37°3°, with 1.3 in34 mm of precipitation and 1 in2.5 cm of snow in a typical October.
- Record high
- 97°36° (1950)
- Record low
- 2°−17° (1917)
- Heating degree days
- 361
- Cooling degree days
- 10
Holly in November
Highs average 57°14° and lows 24°−4°, with 0.61 in15 mm of precipitation and 3 in8 cm of snow in a typical November.
- Record high
- 90°32° (1927)
- Record low
- −9°−23° (1958)
- Heating degree days
- 732
- Cooling degree days
- 0
Holly in December
Highs average 46°8° and lows 15°−9°, with 0.52 in13 mm of precipitation and 2.9 in7.4 cm of snow in a typical December.
- Record high
- 81°27° (1923)
- Record low
- −23°−31° (1932)
- Heating degree days
- 1063
- Cooling degree days
- 0
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