The highest day temperature in October 2026 was 89°F. The lowest night temperature was 28°F. The average values for day and night temperatures during October were 70.7°F и 47.8°F respectivly.

Most of the days in October are sunny but you can also expect cloudy and gloomy days.

Precipitation total in October for Boulder is 0.4 in. It makes october one of the least rainy months of the year.

The average wind speed in October is 6.9 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Boulder in October is 8.3 hours.