Boulder, Colorado is known for its cold temperatures, especially during the winter months. The coldest temperature ever recorded in Boulder was -33°F (-36°C), which occurred on January 17, 1930. However, it is not uncommon for temperatures to drop below freezing during the winter months, with average low temperatures in the 20s (-6°C to -1°C).

Boulder gets so cold because of its location and altitude. It is located in the foothills of the Rocky Mountains at an elevation of 5,430 feet (1,655 meters) above sea level. This high altitude means that Boulder is closer to the atmosphere’s upper layers, where the air is thinner and less able to retain heat. As a result, the air temperature drops more rapidly as you move higher in altitude.

Additionally, Boulder is located in a region where cold Arctic air masses often move in from the north during the winter months. These air masses are extremely cold and can cause temperatures to plummet, leading to frigid conditions in the city. The city’s location also leads to temperature inversions, which occur when a layer of warm air traps colder air near the surface, preventing it from rising and causing temperatures to remain low.

Here are the top 10 coldest temperatures ever recorded in Boulder, Colorado, according to the National Weather Service:

  1. -33°F (-36°C) on January 17, 1930
  2. -30°F (-34°C) on February 1, 1951
  3. -29°F (-34°C) on January 9, 2015
  4. -28°F (-33°C) on January 10, 2017
  5. -27°F (-33°C) on December 22, 1990
  6. -26°F (-32°C) on December 22, 1990
  7. -25°F (-32°C) on February 4, 1989
  8. -24°F (-31°C) on December 9, 1919
  9. -23°F (-31°C) on January 11, 1963
  10. -22°F (-30°C) on February 2, 2011

It’s worth noting that these temperatures were recorded at the official weather station in Boulder and may not be representative of temperatures across the entire city.

Staying safe in freezing cold weather is essential to avoid hypothermia, frostbite, and other related health issues. To stay safe in freezing cold weather, it is important to dress in layers, wear warm and waterproof clothing, and cover all exposed skin to prevent frostbite. It is also crucial to stay hydrated by drinking plenty of fluids, including warm beverages, and avoid consuming alcohol, which can increase heat loss. Furthermore, it is important to avoid overexertion and take frequent breaks to rest and warm up. When going outside, always check the weather forecast and limit your exposure to the cold. Additionally, it is essential to stay connected with friends and family to ensure someone knows your whereabouts and can come to your aid in case of an emergency. Finally, it is important to have an emergency kit with supplies such as blankets, non-perishable food, and a battery-operated radio, in case of power outages or other emergencies. By following these safety tips, you can stay safe and healthy in freezing cold weather.