Temperatures Current Temperature: 35.1°F at Boulder's NCAR Foothills Lab, NE Boulder. Current weather conditions: NCAR Foothills Lab, the NOAA/Skaggs building, the NREL site and the Boulder Weather Underground Sites. Daily Weather Observations 1947-Sep 2018 : temperature, rainfall and snow. Monthly Mean, Maximum and Minimum temperatures from 1893 to Sep 2018 . Daily Records (highs and lows) Days greater than 90F in a month from 1990-Sep 2018 First and Last day of frost in Boulder. Boulder weather station history.