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August Weather in Allentown, United States

Last updated: June 24, 2025

In Allentown, United States, the average temperature in August is a warm 27°C (81°F), with a minimum dipping to 19°C (66°F) and a peak reaching up to 37°C (99°F). Expect a total precipitation of 195 mm (7.7 in) spread over 24 days, contributing to an average humidity level of 78%. Enjoy the warmth while staying prepared for the occasional rain!

August Temperature in Allentown

In August in Allentown, the average temperature is 27°C (81°F). Maximums can reach 37°C (99°F), and minimums can be as low as 19°C (66°F). This makes it an ideal month for travelers who enjoy warm weather and outdoor activities.

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

The chart illustrates August temperature patterns in Allentown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Allentown, August typically has an average temperature of 27°C (81°F), with highs reaching up to 37°C (99°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec525963677579818179725955
Data source: Temperature data for Allentown 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 Allentown

In Allentown in August, the precipitation amount is 195 mm (7.7 in) over a span of 24 days.

August Precipitation Trends in Allentown

The chart displays monthly precipitation patterns in Allentown, 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 Allentown, August typically receives around 195 mm (7.7 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec881317712611520917319515911254124
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Allentown

In Allentown in August humidity is 78%. With an average temperature of 27°C (81°F), this humidity feels like a warm, heavy embrace that makes traveling feel both invigorating and exhausting. Moments spent outside can quickly become clammy and uncomfortable, urging travelers to seek shade and hydration as they explore.

August Average Humidity in Allentown

This chart illustrates the average monthly humidity levels in Allentown, 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 Allentown is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%79%77%74%70%78%78%79%74%83%86%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Allentown

In Allentown 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 Allentown.

Maximum UV Index Levels in Allentown for August

The chart shows the monthly maximum UV Index (UVI) for Allentown 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 Allentown typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111121110864
Data source: Allentown 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 Allentown Compares to Other Months

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

This table compares monthly weather conditions in Allentown, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (53°F)88 mm (3.5 inches)83%moderate
February Weather15°C (59°F)131 mm (5.1 inches)82%very high
March Weather17°C (63°F)77 mm (3.0 inches)79%very high
April Weather19°C (67°F)125 mm (4.9 inches)77%extreme
May Weather24°C (75°F)115 mm (4.5 inches)74%extreme
June Weather26°C (80°F)209 mm (8.2 inches)70%extreme
July Weather27°C (81°F)173 mm (6.8 inches)78%extreme
August Weather27°C (81°F)195 mm (7.7 inches)78%extreme
September Weather26°C (79°F)159 mm (6.2 inches)79%very high
October Weather22°C (72°F)112 mm (4.4 inches)74%very high
November Weather15°C (59°F)54 mm (2.1 inches)83%high
December Weather13°C (56°F)124 mm (4.9 inches)86%moderate

Compare Allentown's Climate with Cities Worldwide