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August Weather in Hillsboro, United States

Last updated: June 24, 2025

In August, the average temperature in Hillsboro, United States hovers around 23°C (74°F). Expect minimum temperatures to dip to 12°C (55°F), while the mercury can rise to a maximum of 33°C (92°F). With an average humidity of 73%, you might experience some muggy days. Be prepared for about 89 mm (3.5 in) of rainfall spread over 13 days throughout the month!

August Temperature in Hillsboro

In August in Hillsboro, the average temperature is 23°C (74°F). Maximums can reach 33°C (92°F), while minimums can be as low as 12°C (55°F). This pleasant climate makes Hillsboro an ideal destination for travelers seeking comfortable weather and outdoor activities.

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

The chart illustrates August 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, August typically has an average temperature of 23°C (74°F), with highs reaching up to 33°C (92°F) and lows dropping to around 12°C (55°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.

August Precipitation in Hillsboro

In Hillsboro in August, the precipitation amount is 89 mm (3.5 in) distributed over 13 days.

August Precipitation Trends in Hillsboro

The chart displays monthly precipitation patterns in Hillsboro, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Hillsboro, August typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec83111134130134140127899610397111
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Hillsboro

In Hillsboro in August, humidity is 73%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping blanket, making traveling a bit sweaty and heavy, but still pleasant if you stay hydrated and take breaks in the shade.

August Average Humidity in Hillsboro

This chart illustrates the average monthly humidity levels in Hillsboro, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Hillsboro is approximately 73%, 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in Hillsboro

In Hillsboro in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Hillsboro.

Maximum UV Index Levels in Hillsboro for August

The chart shows the monthly maximum UV Index (UVI) for Hillsboro in August, 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 August, the maximum UV index in Hillsboro typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Hillsboro August 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 August 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 August’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 August’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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