A weak surface cool front is expected to push through the eastern plains overnight. This will bring little new moisture into the picture...and only an increase in late night clouds east of the mountains. After the clouds dissipate Monday morning...look for a mostly sunny day across the region. Temperatures are going to stay around average in the mountains and southern valleys...and below average on the plains. Look for highs in the 30s and 40s in the high country...the 40s to lower 50s in the San Luis Valley and across the eastern plains. (Please visit http://weather.gov/pub for more information.)