Denver starts Sunday, October 25, under clear skies and near 39 degrees. The high is expected to reach about 59 before clouds build, with a slight chance of showers after 3 p.m. The chance rises to around 40% Sunday night as skies turn mostly cloudy and temperatures settle near 45. Light, variable winds are forecast.
The broader forecast calls for scattered rain and snow showers in the mountains through Monday, with minor travel impacts possible. Denver’s forecast is for a chance of rain, not snow, and no watches or warnings are in effect. For mountain drivers, the Colorado Department of Transportation says traction and chain laws are implemented when conditions warrant; active laws are announced through COtrip.org, highway signage and roadway alerts.
A seasonal benchmark, not a daily comparison
Sunday’s forecast high of 59 and Monday’s 58 are below Denver’s normal average October high of 65.3°F; forecast highs from Tuesday through Friday, ranging from the upper 60s to 71, are above it. The National Weather Service Denver/Boulder identifies 65.3°F as a monthly benchmark, not a normal for October 25 or the specific days ahead. That figure cannot establish whether any of this week’s highs are unusual for their dates or near records.
The mountain forecast also comes during a season when snow timing varies. The National Weather Service Denver/Boulder lists October 19 as Denver’s average date for its first measurable snowfall of at least 0.1 inch—a seasonal reference, not a prediction for this Sunday. The Colorado Climate Center reports that first-snow timing has shifted later by a week or two in recent decades at most Front Range and southeastern Plains stations. That regional finding does not determine this week’s weather or establish what will happen in the mountains.
Sunshine and warmer afternoons follow
Monday, October 26, is expected to be mostly sunny, with a high near 63 and a low around 38 Monday night. Tuesday turns sunny with a high near 69. Highs are forecast in the upper 60s Wednesday and Thursday, reaching about 71 Friday under partly sunny skies. Saturday is expected to reach 63 degrees, with scattered showers.
