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October Weather in Boise City, United States

Last updated: June 24, 2025

In October, the average temperature in Boise City, United States is a comfortable 13°C (56°F). However, be prepared for a temperature range that can drop to a chilly -9°C (16°F) or soar up to a warm 34°C (93°F). Expect some precipitation as well, with an average of 34 mm (1.3 in) over the course of 4 days. With an average humidity of 78%, it's a month to embrace varied weather!

October Temperature in Boise City

In October in Boise City, the average temperature is 13°C (56°F). Maximums can reach 34°C (93°F), while minimums can drop as low as -9°C (16°F). This diverse weather makes it essential to pack both warm and cool clothing for your trip.

October Weather in Boise City: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Boise City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boise City, October typically has an average temperature of 13°C (56°F), with highs reaching up to 34°C (93°F) and lows dropping to around -9°C (16°F).
JanFebMarAprMayJunJulAugSepOctNovDec363748556475797671564739
Data source: Temperature data for Boise City 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 Boise City

In Boise City in October, the precipitation amount is 34 mm (1.3 in) over a span of 4 days.

October Precipitation Trends in Boise City

The chart displays monthly precipitation patterns in Boise City, 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 Boise City, October typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec16113641603744553234715
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Boise City

In Boise City in October, humidity is 78%. With an average temperature of 13°C (56°F), this humidity feels like a damp chill that can make outdoor activities a bit uncomfortable, creating a heavy atmosphere that clings to the skin, urging travelers to dress in layers for warmth and comfort.

October Average Humidity in Boise City

This chart illustrates the average monthly humidity levels in Boise City, 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 Boise City is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%76%64%61%71%75%75%80%80%78%76%78%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Boise City

In Boise City in October, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Boise City.

Maximum UV Index Levels in Boise City for October

The chart shows the monthly maximum UV Index (UVI) for Boise City 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 Boise City typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110753
Data source: Boise City 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 Boise City Compares to Other Months

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

This table compares monthly weather conditions in Boise City, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)16 mm (0.6 inches)73%moderate
February Weather3°C (37°F)11 mm (0.4 inches)76%high
March Weather9°C (49°F)36 mm (1.4 inches)64%very high
April Weather13°C (55°F)41 mm (1.6 inches)61%very high
May Weather18°C (64°F)60 mm (2.4 inches)71%extreme
June Weather24°C (76°F)37 mm (1.5 inches)75%extreme
July Weather26°C (79°F)44 mm (1.7 inches)75%extreme
August Weather25°C (77°F)55 mm (2.2 inches)80%extreme
September Weather22°C (71°F)32 mm (1.3 inches)80%very high
October Weather13°C (56°F)34 mm (1.3 inches)78%high
November Weather8°C (47°F)7 mm (0.3 inches)76%moderate
December Weather4°C (39°F)15 mm (0.6 inches)78%moderate

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