Allentown, NJ Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Allentown, NJ in one place.
Sunny, with a high near 87. West wind around 5 mph.
Local Weather Overview
This forecast page for Allentown, NJ is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Aug 19, 2026 4:22 PM EDT.
The active forecast window currently covers Aug 19 to Aug 25, 2026 for Allentown, NJ.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 19 to Aug 25, 2026
- Latest sync
- Aug 19, 2026 4:22 PM EDT
- Forecast office
- PHI
- Source
- NOAA / NWS
Daily Outlook
This Week in Allentown
This Afternoon looks like the warmest upcoming period in Allentown at 87 degrees F.
Monday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for This Afternoon at about 5 mph W.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 19, 2026 4:22 PM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- PHI
- Radar station
- KDIX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 68. West wind 0 to 5 mph.
A slight chance of showers and thunderstorms between 11am and 1pm, then a chance of showers and thunderstorms between 1pm and 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then showers and thunderstorms. Some of the storms could produce heavy rain. Partly sunny. High near 82, with temperatures falling to around 76 in the afternoon. East wind 0 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Showers and thunderstorms before 4am. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 63. Northeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
A chance of rain showers after 8am. Partly sunny, with a high near 80. Northeast wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers. Mostly cloudy, with a low around 66. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers before 8am, then showers and thunderstorms likely. Mostly cloudy, with a high near 79. Chance of precipitation is 70%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.
A slight chance of rain showers before 8am, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 63. Chance of precipitation is 40%.
Sunny, with a high near 82.
Mostly clear, with a low around 60.
Sunny, with a high near 82.
A slight chance of rain showers between 8pm and 2am. Partly cloudy, with a low around 62.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Aug 19
|
Sunny
|
87°F |
5 mph
W
|
|
Tonight
Aug 19
|
Partly Cloudy
|
68°F |
0 to 5 mph
W
|
|
Thursday
Aug 20
|
Slight Chance Showers And Thunderstorms
|
82°F |
0 to 5 mph
E
|
|
Thursday Night
Aug 20
|
Showers And Thunderstorms
|
63°F |
5 mph
NE
|
|
Friday
Aug 21
|
Chance Rain Showers
|
80°F |
5 mph
NE
|
|
Friday Night
Aug 21
|
Chance Rain Showers
|
66°F |
0 to 5 mph
NE
|
|
Saturday
Aug 22
|
Showers And Thunderstorms Likely
|
79°F |
0 to 5 mph
E
|
|
Saturday Night
Aug 22
|
Showers And Thunderstorms Likely
|
66°F |
0 to 5 mph
SE
|
|
Sunday
Aug 23
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
84°F |
0 to 5 mph
SW
|
|
Sunday Night
Aug 23
|
Chance Showers And Thunderstorms
|
63°F |
0 to 5 mph
W
|
|
Monday
Aug 24
|
Sunny
|
82°F |
5 mph
W
|
|
Monday Night
Aug 24
|
Mostly Clear
|
60°F |
0 to 5 mph
NW
|
|
Tuesday
Aug 25
|
Sunny
|
82°F |
0 to 5 mph
W
|
|
Tuesday Night
Aug 25
|
Slight Chance Rain Showers
|
62°F |
0 to 5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Allentown.
