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August Weather in Portal, United States

Last updated: June 24, 2025

In August, the average temperature in Portal, United States is a warm 28°C (82°F), with daily highs reaching up to 40°C (104°F) and the occasional cool dip to 17°C (64°F). Visitors should be prepared for a bit of rain, as there’s an average precipitation of 119 mm (4.7 in) spread over 17 days. With an average humidity of 81%, you'll definitely feel the tropical vibe!

August Temperature in Portal

In August in Portal, the average temperature is 28°C (82°F). The maximum can reach 40°C (104°F), while the minimum can drop to 17°C (64°F). Travelers should be prepared for warm weather and pack accordingly, ensuring to stay hydrated and wear sunscreen for outdoor activities.

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

The chart illustrates August temperature patterns in Portal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portal, August typically has an average temperature of 28°C (82°F), with highs reaching up to 40°C (104°F) and lows dropping to around 17°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec515761677580838279715853
Data source: Temperature data for Portal 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 Portal

In Portal in August, the precipitation amount is 119 mm (4.7 in) spread across 17 days.

August Precipitation Trends in Portal

The chart displays monthly precipitation patterns in Portal, 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 Portal, August typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec8197689278112127119877661121
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Portal

In Portal in August, humidity is 81%. With an average temperature of 28°C (82°F), this humidity feels like a warm blanket wrapped around you, making traveling somewhat uncomfortable as the air thickens, leaving you longing for a refreshing breeze.

August Average Humidity in Portal

This chart illustrates the average monthly humidity levels in Portal, 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 Portal is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%81%81%79%75%75%80%81%83%78%85%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Portal

In Portal in August, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Portal.

Maximum UV Index Levels in Portal for August

The chart shows the monthly maximum UV Index (UVI) for Portal 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 Portal typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479101111111110864
Data source: Portal 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 Portal Compares to Other Months

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

This table compares monthly weather conditions in Portal, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (51°F)81 mm (3.2 inches)86%moderate
February Weather14°C (57°F)97 mm (3.8 inches)81%high
March Weather16°C (61°F)68 mm (2.7 inches)81%very high
April Weather19°C (67°F)92 mm (3.6 inches)79%very high
May Weather24°C (76°F)78 mm (3.1 inches)75%extreme
June Weather27°C (80°F)112 mm (4.4 inches)75%extreme
July Weather28°C (83°F)127 mm (5.0 inches)80%extreme
August Weather28°C (82°F)119 mm (4.7 inches)81%extreme
September Weather26°C (79°F)87 mm (3.4 inches)83%very high
October Weather22°C (72°F)76 mm (3.0 inches)78%very high
November Weather14°C (58°F)61 mm (2.4 inches)85%high
December Weather12°C (54°F)121 mm (4.8 inches)87%moderate

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