U.S. state and territory temperature extremes

Minimum temperature map of the United States

Maximum temperature map of the United States

U.S. State and Territory Temperature Extremes details the highest and lowest temperatures ever recorded in each of the United States states and territories. These records highlight the vast climatic diversity across the country, influenced by factors such as geographical location, elevation, and proximity to bodies of water.

Record Temperatures by State

Each state in the U.S. has its own record high and low temperatures, reflecting its unique climate conditions. For example, states like Alaska, known for its cold climate, have recorded some of the lowest temperatures in the nation, while states such as Arizona and Nevada, with their desert landscapes, often experience some of the highest temperatures.

Alaska

• Highest Recorded Temperature: 100°F (38°C) in Fort Yukon on June 27, 1915.
• Lowest Recorded Temperature: -80°F (-62°C) at Prospect Creek on January 23, 1971.

Arizona

• Highest Recorded Temperature: 128°F (53°C) at Lake Havasu City on July 29, 1994.
• Lowest Recorded Temperature: -40°F (-40°C) at Hawley Lake on January 7, 1971.

Nevada

• Highest Recorded Temperature: 134°F (57°C) at Death Valley on July 10, 1913, which is also the highest temperature ever recorded on Earth.
• Lowest Recorded Temperature: -50°F (-46°C) at San Jacinto on January 8, 1937.

Record Temperatures by Territory

The U.S. territories also experience a wide range of temperatures, though generally, they have a more tropical climate compared to the mainland states.

Puerto Rico

• Highest Recorded Temperature: 104°F (40°C) at San Juan on August 12, 1987.
• Lowest Recorded Temperature: 40°F (4°C) at Aibonito on March 9, 1911.

Guam

• Highest Recorded Temperature: 96°F (36°C) on April 18, 1971.
• Lowest Recorded Temperature: 65°F (18°C) on February 8, 1973.

Factors Influencing Temperature Extremes

Several factors contribute to the temperature extremes recorded in the U.S. states and territories, including:

• Geographical Location: Proximity to the equator, poles, and oceans can significantly affect temperature.
• Elevation: Higher elevations tend to have cooler temperatures.
• Topography: Mountain ranges and valleys can influence weather patterns and temperatures.
• Urban Heat Island Effect: Urban areas can be significantly warmer than their rural surroundings due to human activities and infrastructure.

Impact of Climate Change

Climate change is expected to influence temperature extremes, with many areas seeing more frequent and intense heatwaves and altered cold temperature records. Understanding past temperature extremes is crucial for preparing for future climatic shifts.