Allentown, PA Weather Tomorrow

Get a closer look at tomorrow's weather in Allentown and the upcoming 5 day forecast with precipitation potential, daytime and nighttime forecasts, temperature highs and lows in Fahrenheit and Celsius, sunrise and sunset times, cloud cover, wind chill, wind speed, and wind direction across the Allentown area and around Lehigh county, Pennsylvania.
Updated: Tue Oct 6th 2026 5:30 PM EDT
Allentown, PA Weather – 10-6 – Sunny
61° / 40°
Sunny
Highs will reach 61°F with lows near 40°F in Allentown, where sunshine is. There's a very small chance of rainfall, only about 2%. Winds will be light at 10mph and gusts of 4mph at 6 PM. Humidity levels should be comfortable, sitting around 52% on average, the maximum being 55% at 11 PM and 49% being its lowest at 6 PM. Barometric pressure is its highest of 30.13inHg at 10 PM, a lowest point of 30.09inHg at 6 PM with an avg 30.12inHg.
Allentown, PA Weather – 10-7 – Sunny
67° / 41°

Weather Tomorrow

Sunny
Allentown may see sunshine, with daytime highs of 67°F and overnight lows near 41°F. There's a very small chance of rainfall, only about 4%. Wind will be moderate, blowing around 13mph on average and gusts of 23mph at 8 PM. The humidity will be on the higher side, averaging about 62%, the maximum being 86% at 11 PM and 50% being its lowest at 12 PM. Barometric pressure is its highest of 30.13inHg at 12 AM, a lowest point of 29.91inHg at 6 PM with an avg 30.01inHg.
Allentown, PA Weather – 10-8 – Sunny
74° / 48°
Sunny
In Allentown, bright and sunny conditions with highs near 74°F and lows around 48°F. There's a very small chance of rainfall, only about 6%. Winds will be light at 10mph and gusts of 17.5mph at 4 PM. The humidity will be on the higher side, averaging about 68%, the maximum being 93% at 4 AM and 38% being its lowest at 2 PM. Barometric pressure is its highest of 30.06inHg at 11 PM, a lowest point of 29.89inHg at 6 AM with an avg 29.93inHg.
Allentown, PA Weather – 10-9 – Sunny
68° / 46°
Sunny
A sunny day is in the forecast for Allentown, with a high of 68°F and a low of 46°F. There's a very small chance of rainfall, only about 3%. Wind will be moderate, blowing around 11mph on average and gusts of 14.4mph at 2 PM. Humidity levels should be comfortable, sitting around 56% on average, the maximum being 70% at 7 AM and 36% being its lowest at 2 PM. Barometric pressure is its highest of 30.35inHg at 11 PM, a lowest point of 30.06inHg at 1 AM with an avg 30.2inHg.
Allentown, PA Weather – 10-10 – Sunny
70° / 45°
Sunny
Allentown may see a sunny day, with daytime highs of 70°F and overnight lows near 45°F. There's a very small chance of rainfall, only about 5%. Winds will be light at 10mph and gusts of 14.8mph at 2 AM. The humidity will be on the higher side, averaging about 63%, the maximum being 77% at 7 AM and 45% being its lowest at 3 PM. Barometric pressure is its highest of 30.47inHg at 9 AM, a lowest point of 30.36inHg at 12 AM with an avg 30.41inHg.
Allentown, PA Weather – 10-11 – Overcast
69° / 49°
Overcast
Allentown may see cloud-filled skies, with daytime highs of 69°F and overnight lows near 49°F. There might be light rainfall having a 23% chance with an estimated 0in. Winds will be light at 9mph and gusts of 19.3mph at 8 PM. The humidity will be on the higher side, averaging about 78%, the maximum being 91% at 11 PM and 63% being its lowest at 2 PM. Barometric pressure is its highest of 30.43inHg at 2 AM, a lowest point of 30.18inHg at 11 PM with an avg 30.34inHg.

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