October Weather in Keystone, United States

Last updated: June 24, 2025

In Keystone, United States, the average temperature in October hovers around 11°C (52°F). However, temperatures can fluctuate significantly, ranging from a chilly -5°C (23°F) to a warm 31°C (88°F). Be prepared for 143 mm (5.6 in) of precipitation over about 11 days, contributing to an average humidity of 78%.

October Temperature in Keystone

In October in Keystone, the average temperature is 11°C (52°F), with maximums reaching 31°C (88°F) and minimums dropping as low as -5°C (23°F). This varied climate means travelers should be prepared for both warm and chilly conditions during their visit.

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

The chart illustrates October temperature patterns in Keystone, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Keystone, October typically has an average temperature of 11°C (52°F), with highs reaching up to 31°C (88°F) and lows dropping to around -5°C (23°F).

Data source: Temperature data for Keystone generated using information from the Copernicus Climate Change Service.

October Precipitation in Keystone

In Keystone in October, the total precipitation amount reaches 143 mm (5.6 in) over the course of 11 days.

October Precipitation Trends in Keystone

The chart displays monthly precipitation patterns in Keystone, 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 Keystone, October typically receives around 143 mm (5.6 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Keystone

In Keystone in October humidity is 78%. With an average temperature of 11°C (52°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities somewhat uncomfortable and travel more challenging as you navigate the moist air.

October Average Humidity in Keystone

This chart illustrates the average monthly humidity levels in Keystone, 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 Keystone is approximately 78%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Keystone

In Keystone in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Keystone, you can refer to this Hourly UV Index in Keystone.

Maximum UV Index Levels in Keystone for October

The chart shows the monthly maximum UV Index (UVI) for Keystone 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 Keystone typically reaches 6, which falls under the high exposure category.

Data source: Keystone 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 Keystone Compares to Other Months

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

This table compares monthly weather conditions in Keystone, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	45 mm (1.8 inches)	81%	moderate
February Weather	-5°C (23°F)	52 mm (2.1 inches)	81%	moderate
March Weather	3°C (38°F)	73 mm (2.9 inches)	81%	high
April Weather	9°C (48°F)	85 mm (3.3 inches)	82%	very high
May Weather	16°C (62°F)	162 mm (6.4 inches)	78%	very high
June Weather	23°C (73°F)	143 mm (5.6 inches)	81%	extreme
July Weather	24°C (76°F)	91 mm (3.6 inches)	79%	very high
August Weather	22°C (72°F)	64 mm (2.5 inches)	77%	very high
September Weather	20°C (67°F)	121 mm (4.8 inches)	78%	very high
October Weather	11°C (52°F)	143 mm (5.6 inches)	78%	high
November Weather	3°C (38°F)	45 mm (1.8 inches)	87%	moderate
December Weather	-1°C (30°F)	40 mm (1.6 inches)	84%	moderate