Boulder Weather In Fahrenheit. The average high and low temperatures are listed below monthly and an
The average high and low temperatures are listed below monthly and annually for the city, in both degrees Fahrenheit and Celsius. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Boulder area. Temperatures are in degrees Fahrenheit. Boulder Weather Forecasts. January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Boulder. Weather. 1°F at Boulder's NCAR Foothills Lab, in NE Boulder. Be prepared with the most accurate 10-day forecast for Transit Village, Boulder, Colorado with highs, lows, chance of precipitation from The Weather Channel and Weather. Values are whole numbers. Passing clouds.