Allentown, PA Weather Forecast
Right now it is 70°F and cloudy in Allentown (as of Thu, 6:40 PM EST). Tomorrow: slight chance rain showers, high near 69°F. Official NWS forecast and alerts, refreshed every 30 minutes.
Current conditions
Measured at Allentown, Lehigh Valley International Airport (4 mi from the city center).
Weather tomorrow in Allentown
Slight Chance Rain Showers
23% chance of rain/snow69°FA slight chance of rain showers before 1pm. Partly sunny, with a high near 69. Northwest wind around 0 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Partly Cloudy48°FPartly cloudy, with a low around 48. Northwest wind 0 to 5 mph.
Weather alerts
No active National Weather Service watches, warnings or advisories for Allentown right now.
7-day forecast
Rain Showers Likely 70% chance of rain/snow57°FTonight: Rain showers likely before 2am. Mostly cloudy, with a low around 57. Southwest wind 0 to 5 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Slight Chance Rain Showers 23% chance of rain/snow69°F / 48°FA slight chance of rain showers before 1pm. Partly sunny, with a high near 69. Northwest wind around 0 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. Friday Night: Partly cloudy, with a low around 48. Northwest wind 0 to 5 mph.
Chance Light Rain 31% chance of rain/snow62°F / 43°FA chance of rain after 7am. Partly sunny, with a high near 62. West wind 5 to 10 mph. Chance of precipitation is 30%. Saturday Night: A chance of rain before 7pm. Partly cloudy, with a low around 43. West wind around 10 mph. Chance of precipitation is 30%.
Mostly Sunny62°F / 39°FMostly sunny, with a high near 62. Sunday Night: Mostly clear, with a low around 39.
Sunny62°F / 37°FSunny, with a high near 62. Monday Night: Mostly clear, with a low around 37.
Sunny65°F / 36°FSunny, with a high near 65. Tuesday Night: Mostly clear, with a low around 36.
Sunny61°F / 31°FSunny, with a high near 61. Wednesday Night: Partly cloudy, with a low around 31.
Sunny57°FSunny, with a high near 57.
Forecast issued by NWS forecast office PHI · updated Nov 5, 4:07 PM EST. Daytime highs and overnight lows are on the right.
Hourly forecast, radar & more on weather.gov
Nearby cities
Allentown population: 126,044 (U.S. Census Bureau, July 1, 2025 estimate). More Pennsylvania cities · All US cities
Source: National Weather Service / NOAA (public domain), fetched live. Tachlis is not affiliated with the NWS.
Questions & answers
What is the weather tomorrow in Allentown?
Friday, November 6: Slight Chance Rain Showers, high near 69°F; night: partly cloudy, low around 48°F.
Where does the Allentown forecast come from?
From the National Weather Service forecast office PHI, which writes the official forecast for Allentown's 2.5 km grid square. Current conditions come from the nearest NWS/FAA weather station.
How often is the Allentown weather updated?
This page fetches fresh data from the National Weather Service at most every 30 minutes, and checks for new watches and warnings every 5 minutes.
What time zone are the times shown in?
Local time for Allentown (America/New York).
Why can the current temperature differ from the forecast?
The current reading is a real measurement at a weather station, often at an airport, while the forecast describes the whole grid square around the city. Temperatures can differ by a few degrees across a city.