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October Weather in Grand Junction, United States

Last updated: June 24, 2025

In October, the average temperature in Grand Junction, United States is a comfortable 11°C (52°F). Visitors may experience a temperature range from a chilly -7°C (20°F) to a warm 32°C (90°F). Precipitation is expected to be around 122 mm (4.8 in) over approximately 10 days, with an average humidity of 75%. Embrace the diversity of weather this month in Grand Junction!

October Temperature in Grand Junction

In October in Grand Junction, the average temperature is 11°C (52°F), with maximums reaching 32°C (90°F) and minimums dropping as low as -7°C (20°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to enjoy their visit.

October Weather in Grand Junction: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Grand Junction, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grand Junction, October typically has an average temperature of 11°C (52°F), with highs reaching up to 32°C (90°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec222339496274777368523830
Data source: Temperature data for Grand Junction 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 Grand Junction

In Grand Junction in October, the total precipitation amount reaches 122 mm (4.8 in) over the course of 10 days.

October Precipitation Trends in Grand Junction

The chart displays monthly precipitation patterns in Grand Junction, 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 Grand Junction, October typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec3239766616310184901081233637
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Grand Junction

In Grand Junction in October, humidity is 75%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a little less inviting and prompting the need for warm layers.

October Average Humidity in Grand Junction

This chart illustrates the average monthly humidity levels in Grand Junction, 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 Grand Junction is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Grand Junction

In Grand Junction 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 Grand Junction, you can refer to this Hourly UV Index in Grand Junction.

Maximum UV Index Levels in Grand Junction for October

The chart shows the monthly maximum UV Index (UVI) for Grand Junction 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 Grand Junction typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35589111098643
Data source: Grand Junction 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 Grand Junction Compares to Other Months

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

This table compares monthly weather conditions in Grand Junction, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)32 mm (1.3 inches)78%moderate
February Weather-5°C (23°F)39 mm (1.5 inches)80%moderate
March Weather4°C (39°F)76 mm (3.0 inches)77%moderate
April Weather9°C (49°F)66 mm (2.6 inches)77%very high
May Weather17°C (62°F)163 mm (6.4 inches)77%very high
June Weather23°C (74°F)101 mm (4.0 inches)81%extreme
July Weather25°C (77°F)84 mm (3.3 inches)81%very high
August Weather23°C (74°F)90 mm (3.5 inches)77%very high
September Weather20°C (68°F)108 mm (4.2 inches)73%very high
October Weather11°C (52°F)122 mm (4.8 inches)75%high
November Weather3°C (38°F)36 mm (1.4 inches)85%moderate
December Weather-1°C (30°F)37 mm (1.4 inches)83%moderate

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