Boulder City weather by month
What a typical year looks like in Boulder City, Nevada: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Alan Bible Visitor Center, 21 km from Boulder City; records cover 1997–2026.
The year at a glance
- Precipitation a year
- 6.5 in166 mm
- Snow a year
- Rare
- Last spring freeze
- Jan 28
- First fall freeze
- Dec 10
- Heating degree days
- 1,617
- Cooling degree days
- 4,084
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 31°−1° (heating, 99%) and 115°46° (cooling, 1%).
Month by month
Boulder City in January
Highs average 60°15° and lows 41°5°, with 0.78 in20 mm of precipitation in a typical January.
- Record high
- 75°24° (2015)
- Record low
- 21°−6° (2020)
- Heating degree days
- 459
- Cooling degree days
- 0
Boulder City in February
Highs average 64°18° and lows 45°7°, with 0.93 in24 mm of precipitation in a typical February.
- Record high
- 84°29° (2026)
- Record low
- 18°−8° (2020)
- Heating degree days
- 294
- Cooling degree days
- 2
Boulder City in March
Highs average 73°23° and lows 52°11°, with 1 in25 mm of precipitation in a typical March.
- Record high
- 100°38° (2026)
- Record low
- 21°−6° (2020)
- Heating degree days
- 138
- Cooling degree days
- 54
Boulder City in April
Highs average 81°27° and lows 59°15°, with 0.29 in7.4 mm of precipitation in a typical April.
- Record high
- 100°38° (2007)
- Record low
- 38°3° (2006)
- Heating degree days
- 32
- Cooling degree days
- 170
Boulder City in May
Highs average 91°33° and lows 66°19°, with 0.18 in4.6 mm of precipitation in a typical May.
- Record high
- 110°43° (2008)
- Record low
- 42°6° (2021)
- Heating degree days
- 3
- Cooling degree days
- 425
Boulder City in June
Highs average 103°39° and lows 77°25°, with 0.08 in2 mm of precipitation in a typical June.
- Record high
- 119°48° (2017)
- Record low
- 55°13° (2006)
- Heating degree days
- 0
- Cooling degree days
- 748
Boulder City in July
Highs average 107°42° and lows 84°29°, with 0.64 in16 mm of precipitation in a typical July.
- Record high
- 120°49° (2024)
- Record low
- 68°20° (2016)
- Heating degree days
- 0
- Cooling degree days
- 951
Boulder City in August
Highs average 105°41° and lows 82°28°, with 0.48 in12 mm of precipitation in a typical August.
- Record high
- 119°48° (2026)
- Record low
- 63°17° (2014)
- Heating degree days
- 0
- Cooling degree days
- 877
Boulder City in September
Highs average 98°37° and lows 73°23°, with 0.36 in9.1 mm of precipitation in a typical September.
- Record high
- 113°45° (2022)
- Record low
- 53°12° (2006)
- Heating degree days
- 0
- Cooling degree days
- 612
Boulder City in OctoberThis month
Highs average 84°29° and lows 59°15°, with 0.49 in12 mm of precipitation in a typical October.
- Record high
- 106°41° (2024)
- Record low
- 36°2° (2019)
- Heating degree days
- 22
- Cooling degree days
- 224
Boulder City in November
Highs average 69°21° and lows 50°10°, with 0.42 in11 mm of precipitation in a typical November.
- Record high
- 89°32° (2007)
- Record low
- 28°−2° (2006)
- Heating degree days
- 192
- Cooling degree days
- 21
Boulder City in December
Highs average 60°15° and lows 40°4°, with 0.88 in22 mm of precipitation in a typical December.
- Record high
- 81°27° (2005)
- Record low
- 22°−6° (2019)
- Heating degree days
- 477
- Cooling degree days
- 0