nomadseason

August Weather in Hillsboro, United States

Last updated: June 24, 2025

In August, the average temperature in Hillsboro, United States hovers around 25°C (77°F). Temperatures can vary significantly, with a minimum of 12°C (55°F) and a maximum soaring up to 37°C (99°F). Expect moderate rainfall, accumulating to 138 mm (5.4 in) over approximately 10 days of the month, accompanied by a high average humidity of 78%.

August Temperature in Hillsboro

In August in Hillsboro, the average temperature is 25°C (77°F). The maximum can reach 37°C (99°F) and the minimum can be as low as 12°C (55°F). Be prepared for warm days and cooler nights, making it an ideal time for outdoor activities and exploring the local attractions.

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 25°C (77°F), with highs reaching up to 37°C (99°F) and lows dropping to around 12°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec333347556577807772574538
Data source: Temperature data for Hillsboro generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 138 mm (5.4 in) over a span of 10 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 138 mm (5.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec32338073175967913880972929
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

August Humidity in Hillsboro

In Hillsboro in August, humidity is 78%. With an average temperature of 25°C (77°F), this humidity feels like walking through a warm, damp blanket, making travel feel a bit more exhausting and sticky as you navigate the sights.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679101111109743
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)32 mm (1.3 inches)76%moderate
February Weather1°C (34°F)33 mm (1.3 inches)77%high
March Weather8°C (47°F)80 mm (3.1 inches)70%high
April Weather13°C (55°F)73 mm (2.9 inches)73%very high
May Weather19°C (66°F)175 mm (6.9 inches)82%very high
June Weather25°C (78°F)95 mm (3.8 inches)82%extreme
July Weather27°C (80°F)79 mm (3.1 inches)81%extreme
August Weather25°C (77°F)138 mm (5.4 inches)78%very high
September Weather22°C (72°F)80 mm (3.1 inches)71%very high
October Weather14°C (57°F)97 mm (3.8 inches)71%high
November Weather7°C (45°F)29 mm (1.1 inches)81%moderate
December Weather3°C (38°F)29 mm (1.1 inches)84%moderate

Compare Hillsboro's Climate with Cities Worldwide