Idalia weather by month
What a typical year looks like in Idalia, Colorado: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Bonny Dam 2ne, 16 km from Idalia; records cover 1949–2026.
The year at a glance
- Precipitation a year
- 18 in456 mm
- Snow a year
- 24 in61 cm
- Last spring freeze
- May 2
- First fall freeze
- Oct 13
- Heating degree days
- 5,807
- 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 −3°−19° (heating, 99%) and 101°38° (cooling, 1%).
Month by month
Idalia in January
Highs average 43°6° and lows 17°−8°, with 0.37 in9.4 mm of precipitation and 5 in12 cm of snow in a typical January.
- Record high
- 79°26° (1982)
- Record low
- −30°−34° (1984)
- Heating degree days
- 1087
- Cooling degree days
- 0
Idalia in February
Highs average 46°8° and lows 19°−7°, with 0.43 in11 mm of precipitation and 5 in13 cm of snow in a typical February.
- Record high
- 85°29° (2017)
- Record low
- −27°−33° (2021)
- Heating degree days
- 915
- Cooling degree days
- 0
Idalia in March
Highs average 56°13° and lows 27°−3°, with 0.89 in23 mm of precipitation and 3 in8 cm of snow in a typical March.
- Record high
- 93°34° (2026)
- Record low
- −24°−31° (1960)
- Heating degree days
- 736
- Cooling degree days
- 0
Idalia in April
Highs average 64°18° and lows 35°1°, with 1.8 in44 mm of precipitation and 2.5 in6.4 cm of snow in a typical April.
- Record high
- 95°35° (1989)
- Record low
- 4°−16° (2013)
- Heating degree days
- 472
- Cooling degree days
- 3
Idalia in May
Highs average 73°23° and lows 45°7°, with 2.7 in69 mm of precipitation and 0.3 in0.8 cm of snow in a typical May.
- Record high
- 101°38° (2000)
- Record low
- 23°−5° (1967)
- Heating degree days
- 219
- Cooling degree days
- 40
Idalia in June
Highs average 86°30° and lows 56°13°, with 2.6 in67 mm of precipitation in a typical June.
- Record high
- 109°43° (2012)
- Record low
- 31°−1° (1951)
- Heating degree days
- 29
- Cooling degree days
- 206
Idalia in July
Highs average 91°33° and lows 62°16°, with 3.2 in81 mm of precipitation in a typical July.
- Record high
- 109°43° (1954)
- Record low
- 43°6° (1959)
- Heating degree days
- 4
- Cooling degree days
- 348
Idalia in August
Highs average 88°31° and lows 59°15°, with 1.9 in47 mm of precipitation in a typical August.
- Record high
- 108°42° (1969)
- Record low
- 40°4° (1964)
- Heating degree days
- 8
- Cooling degree days
- 282
Idalia in September
Highs average 80°27° and lows 50°10°, with 1.8 in45 mm of precipitation and 0.3 in0.8 cm of snow in a typical September.
- Record high
- 103°39° (1971)
- Record low
- 14°−10° (1985)
- Heating degree days
- 101
- Cooling degree days
- 109
Idalia in OctoberThis month
Highs average 67°19° and lows 37°3°, with 1.3 in32 mm of precipitation and 1.8 in4.6 cm of snow in a typical October.
- Record high
- 94°34° (2024)
- Record low
- 6°−14° (1997)
- Heating degree days
- 412
- Cooling degree days
- 7
Idalia in November
Highs average 54°12° and lows 26°−4°, with 0.56 in14 mm of precipitation and 1.9 in4.8 cm of snow in a typical November.
- Record high
- 87°31° (2016)
- Record low
- −7°−22° (1952)
- Heating degree days
- 758
- Cooling degree days
- 0
Idalia in December
Highs average 44°6° and lows 18°−8°, with 0.52 in13 mm of precipitation and 4 in11 cm of snow in a typical December.
- Record high
- 80°27° (1980)
- Record low
- −24°−31° (1983)
- Heating degree days
- 1066
- Cooling degree days
- 0
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