Lake Mead Temperature by Month
Lake Mead, United States of America has an average annual maximum temperature of 29°C (84°F), ranging from 14°C (57°F) in January to 42°C (108°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Lake Mead Monthly Temperatures
With significant temperature fluctuations, Lake Mead enjoys distinct seasons year-round. Nighttime lows range from 28°C (82°F) in July to 3°C (37°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Lake Mead by month:
The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. July, the city's warmest month, gets 383 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical Lake Mead Temperatures: 1976-2026
Browse day-by-day temperature records for Lake Mead spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Lake Mead vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Lake Mead vs World: Temperature Compared
Lake Mead's average annual maximum temperature is 29°C (84°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in Lake Mead?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Lake Mead, January is the coolest month, with average highs of 16°C (61°F) and humidity around 44% — considered moderate. In July, the warmest month, temperatures average 42°C (108°F) with 21% humidity — conditions that feel low. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Lake Mead's weather — including monthly rainfall, sunshine hours, and humidity — visit our Lake Mead climate page.
