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October Weather in Hillsboro, United States

Last updated: June 24, 2025

In October, the average temperature in Hillsboro, United States is a refreshing 15°C (58°F). However, be prepared for a range that can dip to a chilly -1°C (30°F) and soar up to a sweltering 34°C (93°F). During this month, expect 103 mm (4.1 in) of precipitation spread over approximately 13 days, contributing to a high average humidity of 78%.

October Temperature in Hillsboro

In October in Hillsboro, the average temperature is 15°C (58°F), with maximums reaching 34°C (93°F) and minimums dropping as low as -1°C (30°F). This diverse temperature range means travelers should prepare for both warm days and chilly nights.

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

The chart illustrates October temperature patterns in Hillsboro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hillsboro, October typically has an average temperature of 15°C (58°F), with highs reaching up to 34°C (93°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec323644536472767469584338
Data source: Temperature data for Hillsboro 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 Hillsboro

In Hillsboro in October, the precipitation amount is 103 mm (4.1 in) spread over a duration of 13 days.

October Precipitation Trends in Hillsboro

The chart displays monthly precipitation patterns in Hillsboro, 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 Hillsboro, October typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec83111134130134140127899610397111
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Hillsboro

In Hillsboro in October, humidity is 78%. With an average temperature of 15°C (58°F), this humidity feels like a warm and sticky embrace, making outdoor activities a bit uncomfortable and prompting the need for frequent hydration and breaks in the shade.

October Average Humidity in Hillsboro

This chart illustrates the average monthly humidity levels in Hillsboro, 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 Hillsboro is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Hillsboro

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

Maximum UV Index Levels in Hillsboro for October

The chart shows the monthly maximum UV Index (UVI) for Hillsboro 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 Hillsboro typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Hillsboro 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 Hillsboro Compares to Other Months

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

This table compares monthly weather conditions in Hillsboro, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)82 mm (3.2 inches)88%moderate
February Weather2°C (36°F)111 mm (4.4 inches)88%moderate
March Weather7°C (44°F)134 mm (5.3 inches)87%high
April Weather12°C (53°F)129 mm (5.1 inches)85%very high
May Weather18°C (65°F)134 mm (5.3 inches)81%very high
June Weather22°C (72°F)140 mm (5.5 inches)82%very high
July Weather24°C (76°F)126 mm (5.0 inches)81%very high
August Weather23°C (74°F)89 mm (3.5 inches)73%very high
September Weather21°C (69°F)96 mm (3.8 inches)73%very high
October Weather15°C (58°F)103 mm (4.1 inches)78%high
November Weather6°C (43°F)97 mm (3.8 inches)89%moderate
December Weather3°C (38°F)111 mm (4.4 inches)87%moderate

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