Fall Weather Arrives in Denver in October

The weather in Denver starts to cool down in October as fall temperatures arrive!

Days are warmer to start the month, and most are in the mid to upper 60s, with a few days still hitting that nice 70-degree mark. While days tend to trend colder toward the end of the month, with temperatures in the mid to lower 60s by Halloween. Temperatures begin to rise above the morning lows around 10 AM.

At night, you will find a similar pattern. It’s a little warmer at the beginning of the month, with lows in the lower 40s to upper 30s.

We see the freezing evening temps around mid-month, continuing until the end. Plan to bring a sweater if you are during the evening as temperatures begin to drop quickly around 8 PM.

We also start to see a little more snow and get about 4 inches this time of year, so it’s still easy to travel around. We often get a light dusting up to an inch at a time, but this often melts off quickly when the sun comes out the next day.

We can also get a little rain on warmer days, averaging just an inch or two of rain.

Historical Temperature Averages in October

  • High: 66° F
  • Low: 33° F

Some would describe October Weather in Denver as “Fairly chilly with a slight breeze.”

The average temperature in Denver in October during the day varies between a high of 66°F (19°C) and a low of 37°F (3°C).

How does this compare to the weather in Denver for the rest of the year? Denver’s hottest month is July, which has days with highs of 88°F (31°C) and lows of 60°F (15°C). It’s the coldest in February, with highs of 43°F (6°C) and lows of 21°F (-6°C).

How much does it rain or snow in Denver in October?

Not very much, thankfully! In Denver in October, there’s a 15% chance of rain or snow on any given day. This is in stark comparison to Denver’s wettest month, July, where there is a 43% chance of precipitation on a typical day.

Denver’s dryest month in Denver is January, with only a 10.8% chance of precipitation.

How cloudy is Denver in October?

Historically in October, 64% of the day (15.3 hours), the sky is “clear” or sunny, meaning that it can be described as partly cloudy at most. The only month with “clearer” days in Denver would be September, where it’s 17.0 hours, while April is the cloudiest month, with only about 12 hours of “clear” sunshine.

When does the sun rise and set in Denver in October?

On average, days in October in Denver have about 11 hours of daylight, with the sun rising around 7:00 AM and setting at around 6:00 PM.

The month with the longest day in Denver is June, with 15 hours, while December has the shortest day, with only 9 hours.

How humid is it in October in Denver?

In October, Denver is comfortable and would be classified as “somewhat humid,” with an average relative humidity of 47%. The most humid month in Denver is February (60%), and June is the least humid(40%).

How windy is it in October in Denver?

Denver is windy most of the year, and October is no different. During October, the wind blows about 13.4 mph (21.6 kph). This does not differ much from the windiest month, January, when it blows 15.9 mph (25.6 kph), or August, the least windy month at 12.0 mph (19.3 kph).

How to Pack for Denver’s October Weather

The Denver weather in October offers cool fall days with lots of sunshine. You will want to prepare with some heavier clothing this time of year.

During the day, you will probably want to wear khakis, medium to long-sleeved shirts, lighter sweaters, and full dresses. Toward the end of the month, you might need blue jeans or something thicker to keep you warm outdoors.

Some days, you can still get away with shorts too. This can change on a day-to-day basis, so be sure to watch the forecast to see if there is a day you can do this during your stay.

At night you are going to need a jacket and a heavier sweater.

Dresses can work, but check out the forecast, as the winds can kick up and make it feel colder than it is. Pants are your best bet, as this is when you’d want to start bundling up to stay warm and cozy.

Where does this data come from?

This data was taken from weather data for Denver collected from the MERRA-2 project from NASA, which used a climate model combined with historical data from weather stations around the world to estimate what the conditions were like for every point on the Earth.