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Hoover Dam

Travel Info

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Hoover Dam Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Hoover Dam year round climate

  • Spring (March–May): 57–77°F on average, mild climate, more rainfall in March, other months dry. Common activities: Visit Hoover Dam, hike along the Colorado River. Recommended clothing: Light jacket, long-sleeved shirt, possibly rain gear in March.
  • Summer (June–August): 87–95°F on average, hot and dry, hottest in July. Common activities: Visit Hoover Dam in the early morning or evening, avoid midday sun. Recommended clothing: Light and breathable clothing, hat, sunglasses, sunscreen.
  • Autumn (September–November): 72–83°F on average, pleasant and comfortable climate, dry with little rain. Common activities: Hiking, photography, enjoying the views of the Colorado River. Recommended clothing: Long-sleeved shirt, light jacket.
  • Winter (December–February): 48–51°F on average, cold and dry, little rain. Common activities: Visit indoor exhibits at Hoover Dam. Recommended clothing: Warm jacket, hat, gloves, scarf.

Hoover Dam climatological average

Annual average temperature: approx. 69.8°F / Annual rainfall: approx. 118 mm / Summer humidity: 20%–30% / Rainiest month: March

Hoover Dam monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
48°F
24
February
51.1°F
23.3
March
57.4°F
27
April
68°F
0.5
May
77.2°F
1.3
June
87.6°F
0.8
July
95.4°F
4
August
90°F
19.2
September
83.3°F
9.2
October
72.1°F
0.8
November
54°F
3.8
December
50°F
4.7

Hoover Dam weather for the next seven days

9/23
Wednesday
Sunny
91.7°F/70.8°F
9/24
Thursday
Sunny
96.3°F/75°F
9/25
Friday
Sunny
94.1°F/73°F
9/26
Saturday
Overcast
93.4°F/74.3°F
9/27
Sunday
Overcast
88.3°F/71.7°F
9/28
Monday
Sunny
84.8°F/66.9°F
9/29
Tuesday
Sunny
89°F/68°F

Hoover Dam Frequently Asked Questions and Useful Information for Travel

What are 5 interesting facts about the Hoover Dam?

Here are five interesting facts about the Hoover Dam: 1) The immense pressure from Lake Mead, the reservoir it created, triggered a series of earthquakes in the region. 2) Enough concrete was used to build a two-lane road from San Francisco to New York City. 3) While built for power, the dam's primary purpose was flood control for the Colorado River. 4) The dam was originally named Boulder Dam by the Roosevelt administration before being officially renamed Hoover Dam in 1947. 5) Building the dam led to the creation of Boulder City, a planned community to house the thousands of workers and their families.

Can you still drive over Hoover Dam?

Yes, you can still drive across Hoover Dam, but it's no longer a through-route and you must drive back the way you came. Visitors enter from the Nevada side, drive across the top, and then must turn around and exit on the same Nevada side. Be prepared for security inspections when you enter the dam area. SUVs, passenger cars, and other light vehicles are permitted.

Is Hoover Dam located in Nevada or Arizona?

Hoover Dam and Lake Mead span the Arizona-Nevada state line. The dam is located in the Black Canyon of the Colorado River, about 35 miles southeast of Las Vegas, Nevada.

Can you visit Hoover Dam for free?

Yes, you can visit Hoover Dam for free. You can walk on top of the dam and the surrounding bypass bridge for free. The dam site is open to the public, and you can explore the outdoor areas and enjoy the scenic views for free. You will need to pay for parking in certain areas and for any guided tours.

What is the primary purpose of the Hoover Dam?

While the Hoover Dam is famous for generating hydroelectric power, its primary purpose was to tame the wild Colorado River and prevent destructive floods. It also plays a crucial role in providing water for irrigation and municipal use.