Arvada weather by month
What a typical year looks like in Arvada, Wyoming: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Leiter 9n, 24 km from Arvada; records cover 1964–2026.
The year at a glance
- Precipitation a year
- 15.6 in395 mm
- Snow a year
- 53 in136 cm
- Last spring freeze
- May 12
- First fall freeze
- Sep 27
- Heating degree days
- 7,229
- Cooling degree days
- 645
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −11°−24° (heating, 99%) and 100°38° (cooling, 1%).
Month by month
Arvada in January
Highs average 35°2° and lows 14°−10°, with 0.55 in14 mm of precipitation and 9 in23 cm of snow in a typical January.
- Record high
- 65°18° (2005)
- Record low
- −34°−37° (1997)
- Heating degree days
- 1265
- Cooling degree days
- 0
Arvada in February
Highs average 37°3° and lows 16°−9°, with 0.5 in13 mm of precipitation and 8 in20 cm of snow in a typical February.
- Record high
- 71°22° (1995)
- Record low
- −35°−37° (1996)
- Heating degree days
- 1076
- Cooling degree days
- 0
Arvada in March
Highs average 49°10° and lows 24°−4°, with 1 in26 mm of precipitation and 9 in22 cm of snow in a typical March.
- Record high
- 84°29° (2026)
- Record low
- −19°−28° (2019)
- Heating degree days
- 876
- Cooling degree days
- 0
Arvada in April
Highs average 57°14° and lows 32°0°, with 1.8 in46 mm of precipitation and 8 in20 cm of snow in a typical April.
- Record high
- 88°31° (1980)
- Record low
- −1°−18° (2020)
- Heating degree days
- 612
- Cooling degree days
- 0
Arvada in May
Highs average 67°19° and lows 41°5°, with 2.7 in69 mm of precipitation and 1.2 in3 cm of snow in a typical May.
- Record high
- 95°35° (2026)
- Record low
- 15°−9° (1967)
- Heating degree days
- 350
- Cooling degree days
- 8
Arvada in June
Highs average 78°26° and lows 50°10°, with 2.3 in59 mm of precipitation in a typical June.
- Record high
- 106°41° (2002)
- Record low
- 31°−1° (1969)
- Heating degree days
- 105
- Cooling degree days
- 77
Arvada in July
Highs average 89°32° and lows 57°14°, with 1.7 in44 mm of precipitation in a typical July.
- Record high
- 111°44° (2006)
- Record low
- 38°3° (1987)
- Heating degree days
- 15
- Cooling degree days
- 264
Arvada in August
Highs average 88°31° and lows 56°13°, with 0.8 in20 mm of precipitation in a typical August.
- Record high
- 105°41° (1979)
- Record low
- 34°1° (2015)
- Heating degree days
- 23
- Cooling degree days
- 232
Arvada in September
Highs average 77°25° and lows 46°8°, with 1.3 in33 mm of precipitation and 0.4 in1 cm of snow in a typical September.
- Record high
- 104°40° (1978)
- Record low
- 12°−11° (1984)
- Heating degree days
- 169
- Cooling degree days
- 62
Arvada in OctoberThis month
Highs average 60°15° and lows 34°1°, with 1.6 in40 mm of precipitation and 4 in11 cm of snow in a typical October.
- Record high
- 92°33° (2011)
- Record low
- −13°−25° (1991)
- Heating degree days
- 562
- Cooling degree days
- 2
Arvada in November
Highs average 46°8° and lows 23°−5°, with 0.65 in17 mm of precipitation and 6 in16 cm of snow in a typical November.
- Record high
- 77°25° (1965)
- Record low
- −20°−29° (1985)
- Heating degree days
- 924
- Cooling degree days
- 0
Arvada in December
Highs average 35°2° and lows 14°−10°, with 0.58 in15 mm of precipitation and 8 in21 cm of snow in a typical December.
- Record high
- 73°23° (2021)
- Record low
- −36°−38° (1983)
- Heating degree days
- 1252
- Cooling degree days
- 0