average temperature by month in brighton,colorado
1 The highest monthly average temperature in Brighton for July is 80 degrees. 2  The lowest monthly average temperature in Brighton for December is 35 degrees.  The most monthly precipitation in Brighton occurs in January with 0 inches.
1 The lowest monthly average temperature in Brighton for December is 35 degrees. 2  The most monthly precipitation in Brighton occurs in January with 0 inches. 3  The air quality index in Brighton is 8% worse than the national average.  The pollution index in Brighton is 82% better than the national average.