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October Weather in Denver, United States

Last updated: June 24, 2025

In Denver, United States, the average temperature in October hovers around 18°C (65°F), offering a pleasant climate. However, be prepared for a temperature range that can dip to a chilly 1°C (34°F) and soar as high as a sweltering 35°C (95°F). This month also brings about 107 mm (4.2 in) of precipitation over approximately 9 days, with an average humidity level of 79%, creating a refreshing atmosphere.

October Temperature in Denver

In October in Denver, the average temperature is 18°C (65°F). Maximums can reach 35°C (95°F), while minimums can be as low as 1°C (34°F). This diverse temperature range makes Denver an ideal destination for travelers looking to experience both warm days and cooler nights.

October Weather in Denver: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Denver, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Denver, October typically has an average temperature of 18°C (65°F), with highs reaching up to 35°C (95°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec434853617076817874645046
Data source: Temperature data for Denver generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Denver

In Denver in October, the precipitation amount is 107 mm (4.2 in), occurring over a span of 9 days.

October Precipitation Trends in Denver

The chart displays monthly precipitation patterns in Denver, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Denver, October typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9011687111119798810312810787119
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Denver

In Denver in October, humidity is 79%. With an average temperature of 18°C (65°F), this humidity feels like walking through a warm mist, making traveling slightly uncomfortable and sticky, but offering a refreshing escape when you find moments of shade or a breeze.

October Average Humidity in Denver

This chart illustrates the average monthly humidity levels in Denver, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Denver is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Denver

In Denver in October, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Denver.

Maximum UV Index Levels in Denver for October

The chart shows the monthly maximum UV Index (UVI) for Denver in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In October, the maximum UV index in Denver typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101111109853
Data source: Denver October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How October Weather in Denver Compares to Other Months

Weather in Denver varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Denver, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Denver, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)90 mm (3.5 inches)86%moderate
February Weather9°C (48°F)116 mm (4.6 inches)85%high
March Weather12°C (53°F)87 mm (3.4 inches)84%very high
April Weather16°C (62°F)111 mm (4.4 inches)82%very high
May Weather21°C (70°F)119 mm (4.7 inches)83%very high
June Weather25°C (77°F)79 mm (3.1 inches)82%extreme
July Weather27°C (81°F)88 mm (3.5 inches)80%extreme
August Weather26°C (79°F)103 mm (4.0 inches)74%very high
September Weather23°C (74°F)128 mm (5.0 inches)75%very high
October Weather18°C (65°F)107 mm (4.2 inches)79%very high
November Weather10°C (51°F)87 mm (3.4 inches)87%moderate
December Weather8°C (46°F)119 mm (4.7 inches)87%moderate

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