Dillon weather by month
What a typical year looks like in Dillon, Colorado: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at DILLON 1 E, 1 km from Dillon; records cover 1910–2026.
The year at a glance
- Precipitation a year
- 14.9 in378 mm
- Snow a year
- 115 in293 cm
- Last spring freeze
- Jun 24
- First fall freeze
- Jul 13
- Heating degree days
- 10,735
- Cooling degree days
- 0
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −15°−26° (heating, 99%) and 82°28° (cooling, 1%).
Month by month
Dillon in January
Highs average 31°0° and lows 2°−17°, with 0.95 in24 mm of precipitation and 18 in46 cm of snow in a typical January.
- Record high
- 61°16° (1953)
- Record low
- −44°−42° (1940)
- Heating degree days
- 1510
- Cooling degree days
- 0
Dillon in February
Highs average 33°1° and lows 4°−16°, with 0.99 in25 mm of precipitation and 17 in43 cm of snow in a typical February.
- Record high
- 60°16° (1951)
- Record low
- −45°−43° (1916)
- Heating degree days
- 1302
- Cooling degree days
- 0
Dillon in March
Highs average 41°5° and lows 11°−12°, with 1.2 in29 mm of precipitation and 18 in44 cm of snow in a typical March.
- Record high
- 71°22° (2026)
- Record low
- −38°−39° (1932)
- Heating degree days
- 1224
- Cooling degree days
- 0
Dillon in April
Highs average 48°9° and lows 18°−8°, with 1.4 in36 mm of precipitation and 17 in44 cm of snow in a typical April.
- Record high
- 76°24° (1946)
- Record low
- −25°−32° (1924)
- Heating degree days
- 966
- Cooling degree days
- 0
Dillon in May
Highs average 58°14° and lows 26°−3°, with 1.3 in34 mm of precipitation and 6 in16 cm of snow in a typical May.
- Record high
- 80°27° (2002)
- Record low
- −8°−22° (1917)
- Heating degree days
- 721
- Cooling degree days
- 0
Dillon in June
Highs average 69°21° and lows 33°0°, with 1.1 in29 mm of precipitation and 0.7 in1.8 cm of snow in a typical June.
- Record high
- 87°31° (1944)
- Record low
- 11°−12° (1947)
- Heating degree days
- 424
- Cooling degree days
- 0
Dillon in July
Highs average 75°24° and lows 38°3°, with 1.9 in47 mm of precipitation in a typical July.
- Record high
- 89°32° (1939)
- Record low
- 22°−6° (1938)
- Heating degree days
- 262
- Cooling degree days
- 0
Dillon in August
Highs average 73°23° and lows 37°3°, with 1.9 in49 mm of precipitation in a typical August.
- Record high
- 87°31° (1938)
- Record low
- 20°−7° (1928)
- Heating degree days
- 319
- Cooling degree days
- 0
Dillon in September
Highs average 66°19° and lows 30°−1°, with 1.4 in36 mm of precipitation and 1.1 in2.8 cm of snow in a typical September.
- Record high
- 84°29° (1954)
- Record low
- 4°−16° (1924)
- Heating degree days
- 512
- Cooling degree days
- 0
Dillon in OctoberThis month
Highs average 54°12° and lows 21°−6°, with 0.98 in25 mm of precipitation and 7 in18 cm of snow in a typical October.
- Record high
- 77°25° (1938)
- Record low
- −17°−27° (1911)
- Heating degree days
- 856
- Cooling degree days
- 0
Dillon in November
Highs average 41°5° and lows 11°−11°, with 0.88 in22 mm of precipitation and 15 in37 cm of snow in a typical November.
- Record high
- 65°18° (1914)
- Record low
- −30°−34° (1915)
- Heating degree days
- 1162
- Cooling degree days
- 0
Dillon in December
Highs average 32°0° and lows 3°−16°, with 0.87 in22 mm of precipitation and 16 in40 cm of snow in a typical December.
- Record high
- 61°16° (1939)
- Record low
- −46°−43° (1924)
- Heating degree days
- 1477
- Cooling degree days
- 0
UniColorado Heating & Cooling, a Denver HVAC installer
UniColorado Heating & Cooling installs heat pumps, furnaces and air conditioning across the Front Range. 12,000+ heat pumps installed since 2014.