ALLENTOWN, PA 18109 Weather Forecast & Current Conditions

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ALLENTOWN, PA
Current Weather

5:51 PM EDT MAY 16, 2026
Broken Clouds
79°F
Feels Like: 79°F
Dewpoint: 46°F
Rel. Hum.: 31%
Visibility: 10 miles
Wind: SW at 10 mph, gusts to 21
Pressure: 29.93 inches
Last 72 hours

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ALLENTOWN, PA 18109
Weather Forecast

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Snow Depth pages
TONIGHT
Mostly cloudy this evening, then becoming partly cloudy. A chance of sprinkles. Not as cool with lows around 60. Southwest winds 5 to 10 mph.
SUNDAY
Sunny, hot with highs in the mid 80s. West winds around 5 mph.
SUNDAY NIGHT
Partly cloudy. Lows in the lower 60s. Southwest winds around 5 mph in the evening, becoming light and variable.
MONDAY
Sunny, hot with highs around 90. Southeast winds around 5 mph, becoming south in the afternoon.
MONDAY NIGHT
Mostly clear. Lows in the mid 60s. South winds 5 to 10 mph.
TUESDAY
Sunny, hot with highs in the lower 90s.
TUESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s.
WEDNESDAY
Mostly sunny in the morning, then mostly cloudy with showers with a chance of thunderstorms in the afternoon. Hot with highs in the lower 90s. Chance of rain 80 percent.
WEDNESDAY NIGHT
A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Cooler with lows in the upper 50s. Chance of rain 50 percent.
THURSDAY
Partly sunny with a 30 percent chance of showers. Not as warm with highs in the upper 60s.
THURSDAY NIGHT
Partly cloudy with a chance of showers in the evening, then mostly cloudy after midnight. Lows around 50. Chance of rain 30 percent.
FRIDAY
Partly sunny in the morning, then mostly cloudy with a chance of showers in the afternoon. Highs in the upper 60s. Chance of rain 30 percent.
FRIDAY NIGHT
Mostly cloudy with a 40 percent chance of showers. Lows around 50.

Visible Weather Satellite
ALLENTOWN, PA 18109
Infrared Weather Satellite
ALLENTOWN, PA 18109
NEXRAD Weather Radar
ALLENTOWN, PA 18109

ALLENTOWN, PA 3 hourly weather forecast

weather forecast created  5:00 AM PDT  5/16/2026
Saturday
16 MAY 2026
ALLENTOWN, PA 18109 weather forecast Day 1, 12 hours 2 PM 78° 78° Clear 1%

0% Thunder
( 1% severe)
SW   12 35% 48°
High 82° ALLENTOWN, PA 18109 weather forecast Day 1, 15 hours 5 PM 81° 80° Partly Cloudy SW   13 34% 50°
Increasing Clouds



ALLENTOWN, PA 18109 weather forecast Day 1, 18 hours 8 PM 75° 75° Partly Cloudy 7%

0% Thunder
( 2% severe)
SSW   9 43% 51°
ALLENTOWN, PA 18109 weather forecast Day 1, 21 hours 11 PM 68° 68° Mostly Cloudy SW   9 57% 52°
Sunday
17 MAY 2026
ALLENTOWN, PA 18109 weather forecast Day 2, 0 hours 2 AM 65° 65° Partly Cloudy 8%

0% Thunder
( 1% severe)
WSW   8 73% 56°
Low 61° ALLENTOWN, PA 18109 weather forecast Day 2, 3 hours 5 AM 61° 60° Partly Cloudy WSW   7 87% 57°
High 87° ALLENTOWN, PA 18109 weather forecast Day 2, 6 hours 8 AM 66° 66° Partly Cloudy 1%

0% Thunder
( 3% severe)
W   6 81% 60°

Partly Cloudy



ALLENTOWN, PA 18109 weather forecast Day 2, 9 hours 11 AM 79° 80° Partly Cloudy W   7 50% 59°
ALLENTOWN, PA 18109 weather forecast Day 2, 12 hours 2 PM 85° 85° Clear 2%

0% Thunder
( 13% severe)
W   8 41% 59°
ALLENTOWN, PA 18109 weather forecast Day 2, 15 hours 5 PM 87° 86° Partly Cloudy WSW   8 36% 57°
ALLENTOWN, PA 18109 weather forecast Day 2, 18 hours 8 PM 79° 80° Partly Cloudy 1%

0% Thunder
( 5% severe)
WSW   3 52% 60°
ALLENTOWN, PA 18109 weather forecast Day 2, 21 hours 11 PM 70° 70° Mostly Cloudy   CALM 68% 59°
Monday
18 MAY 2026
ALLENTOWN, PA 18109 weather forecast Day 3, 0 hours 2 AM 65° 65° Partly Cloudy 1%

0% Thunder
( 2% severe)
  CALM 75% 57°
Low 61° ALLENTOWN, PA 18109 weather forecast Day 3, 3 hours 5 AM 61° 62° Partly Cloudy   CALM 84% 56°
High 93° ALLENTOWN, PA 18109 weather forecast Day 3, 6 hours 8 AM 67° 67° Partly Cloudy 0%

0% Thunder
( 2% severe)
ENE   1 70% 57°

Clear



ALLENTOWN, PA 18109 weather forecast Day 3, 9 hours 11 AM 82° 82° Clear S   6 46% 59°
ALLENTOWN, PA 18109 weather forecast Day 3, 15 hours 2 PM 90° 90° Clear 5%

0% Thunder
( 10% severe)
SSW   8 38% 61°
ALLENTOWN, PA 18109 weather forecast Day 3, 18 hours 5 PM 93° 93° Clear SSW   10 35% 61°
ALLENTOWN, PA 18109 weather forecast Day 3, 21 hours 8 PM 85° 85° Clear     SSW   8 45% 61°

ALLENTOWN, PA extended weather forecast

Tuesday
19 MAY 2026
Wednesday
20 MAY 2026
Thursday
21 MAY 2026
Friday
22 MAY 2026
Saturday
23 MAY 2026
Low 63° Low 66° Low 61° Low 51° Low 49°
High 93° High 89° High 71° High 68° High 72°
ALLENTOWN, PA 18109 weather forecast Day 4 ALLENTOWN, PA 18109 weather forecast Day 5 ALLENTOWN, PA 18109 weather forecast Day 6 ALLENTOWN, PA 18109 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Partly Cloudy
40% Rain
Mostly Cloudy
57% Rain
Overcast
68% Rain
Overcast
59% Rain
Partly Cloudy
33% Rain
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