Weather in Allentown, Pennsylvania for August 2025
Until now, August 2025 in Allentown has been nearly identical to the historical average, with a temperature of 27.5 °F (showing only a slight deviation of -0.2 °F).
The forecast for the next days in Allentown predicts temperatures to be around 25 °F, close to the historical average.
In general, the average temperature in Allentown at the beginning of August is 27.9 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 25.1 °F by the end of August.
The climate of Allentown in August is notably wet, with an average of 12 rainy days, and a total of 174 mm of precipitation.
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Allentown Weather August
Temperatures trend during August in Allentown
August weather in Allentown day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Overcast | 26° /17° | 30.5 mm | 6 | |
| Aug. 2 |  Moderate or heavy rain shower | 28° /18° | 4 mm | 7 | |
| Aug. 3 | Moderate or heavy rain shower | 30° /17° | 12 mm | 7 | |
| Aug. 4 | Moderate or heavy rain shower | 29° /18° | 4.7 mm | 7 | |
| Aug. 5 |  Sunny | 30° /18° | 0 mm | 7 | |
| Aug. 6 | Moderate or heavy rain shower | 28° /19° | 13.1 mm | 6 | |
| Aug. 7 |  Patchy rain possible | 24° /17° | 4.5 mm | 6 | |
| Aug. 8 | Moderate or heavy rain shower | 24° /15° | 8.6 mm | 6 | |
| Aug. 9 | Moderate or heavy rain shower | 27° /17° | 15.1 mm | 6 | |
| Aug. 10 | Sunny | 29° /17° | 0 mm | 8 | |
| Aug. 11 |  Partly cloudy | 28° /15° | 0 mm | 7 | |
| Aug. 12 | Patchy rain possible | 28° /16° | 0.2 mm | 6 | |
| Aug. 13 | Patchy rain possible | 27° /18° | 6.7 mm | 6 | |
| Aug. 14 | Partly cloudy | 28° /18° | 2.9 mm | 7 | |
| Aug. 15 | Partly cloudy | 29° /18° | 3 mm | 7 | |
| Aug. 16 |  Cloudy | 27° /17° | 0 mm | 6 | |
| Aug. 17 | Moderate rain at times | 28° /19° | 4.5 mm | 7 | |
| Aug. 18 | Moderate or heavy rain shower | 25° /17° | 13.2 mm | 6 | |
| Aug. 19 | Partly cloudy | 27° /16° | 0 mm | 1.1 | |
| Aug. 20 | Patchy rain possible | 21° /15° | 1.4 mm | 0.6 | |
| Aug. 21 | Overcast | 18° /14° | 0 mm | 2 | |
| Aug. 22 | Sunny | 28° /12° | 0 mm | 0.1 | |
| Aug. 23 | Sunny | 27° /13° | 0 mm | 5 | |
| Aug. 24 | Patchy rain possible | 26° /15° | 2.1 mm | 4 | |
| Aug. 25 | Patchy rain possible | 26° /14° | 0.7 mm | 4 | |
| Aug. 26 | Sunny | 24° /11° | 0 mm | 5 | |
| Aug. 27 | Sunny | 23° /10° | 0 mm | 5 | |
| Aug. 28 | Sunny | 24° /10° | 0 mm | 5 | |
| Aug. 29 | Sunny | 26° /11° | 0 mm | 5 | |
| Aug. 30 | Partly cloudy | 27° /13° | 0 mm | 5 | |
| Aug. 31 | Sunny | 26° /11° | 0 mm | 5 | |
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Allentown in August - FAQ
August rainfall patterns in Allentown
UV exposure in Allentown during August
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Where is Allentown?Get accurate weather forecasts for Allentown, located at latitude 40.608 and longitude -75.49. Stay updated with localized weather information tailored for Allentown.