ALLENTOWN, PA 18104 Weather Forecast & Current Conditions

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18104 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
ALLENTOWN, PA Current Weather
7:51 PM EDT JUN 21, 2026
Clear 77°F
Feels Like:	78°F
Dewpoint:	54°F
Rel. Hum.:	45%
Visibility:	10 miles
Wind:	N at 7 mph
Pressure:	29.93 inches
Last 72 hours
Local Area Snow Depth
Pennsylvania Current Weather
Pennsylvania MOS Forecast Weather

Regional Weather Maps

(Automated weather data from NWS/FAA)

18104 WEATHER FORECAST
10-Day model forecast maps 2025 Hurricanes	ALLENTOWN, PA 18104 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Partly cloudy this evening, then becoming mostly cloudy. Lows in the upper 50s. Northwest winds 5 to 10 mph, becoming northeast after midnight.

MONDAY
A chance of showers with a slight chance of thunderstorms in the morning, then showers with a chance of thunderstorms in the afternoon. Some thunderstorms may produce damaging winds in the afternoon. Locally heavy rainfall possible in the afternoon. Highs in the mid 70s. East winds 5 to 10 mph, becoming southeast in the afternoon. Chance of rain near 100 percent.

MONDAY NIGHT
Showers with a chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Some thunderstorms may produce damaging winds in the evening. Locally heavy rainfall possible in the evening. Humid with lows in the lower 60s. South winds 10 to 15 mph, becoming west 5 to 10 mph after midnight. Chance of rain 90 percent.

TUESDAY
Partly sunny with a 40 percent chance of showers. Highs in the upper 70s. North winds 5 to 10 mph with gusts up to 20 mph.

TUESDAY NIGHT
Mostly clear. Lows in the upper 50s. Northwest winds 5 to 10 mph.

WEDNESDAY
Sunny. Highs in the lower 80s.

WEDNESDAY NIGHT
Mostly clear. Lows in the upper 50s.

THURSDAY
Mostly sunny. A chance of showers in the afternoon. Highs in the mid 80s. Chance of rain 40 percent.

THURSDAY NIGHT
Showers likely with a chance of thunderstorms. Lows in the lower 60s. Chance of rain 60 percent.

FRIDAY
Partly sunny with a chance of thunderstorms. Showers likely, mainly in the morning. Highs in the lower 80s. Chance of rain 60 percent.

FRIDAY NIGHT
A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 50 percent.

SATURDAY
Partly sunny. Highs in the mid 80s.

SATURDAY NIGHT
Partly cloudy. Lows in the lower 60s.

18104 WEATHER SATELLITE LOOPS

Visible Weather Satellite
ALLENTOWN, PA 18104

Infrared Weather Satellite
ALLENTOWN, PA 18104

18104 WEATHER RADAR LOOP

NEXRAD Weather Radar
ALLENTOWN, PA 18104

MOS COMPUTER WEATHER FORECAST

ALLENTOWN, PA 3 hourly weather forecast

weather forecast created 5:00 AM PDT 6/21/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Sunday
21 JUN 2026

2 PM

80°

80°

Partly Cloudy

0%

0% Thunder
( 9% severe)

WNW 10

39%

53°

High 83°

5 PM

82°

81°

Mostly Cloudy

WNW 9

35%

52°

Partly Cloudy

8 PM

77°

78°

Partly Cloudy

2%

0% Thunder
( 2% severe)

NW 5

45%

54°

11 PM

68°

68°

Partly Cloudy

CALM

61%

54°

Monday
22 JUN 2026

2 AM

64°

66°

Partly Cloudy

8%

0% Thunder
( 1% severe)

CALM

70%

54°

Low 59°

5 AM

61°

62°

Mostly Cloudy

ENE 3

75%

53°

High 77°

8 AM

66°

66°

Mostly Cloudy

66%
RAIN
***

0% Thunder
( 18% severe)

ENE 6

68%

55°

Mostly Cloudy

Rain Likely

11 AM

72°

72°

Mostly Cloudy

E 8

64%

59°

2 PM

73°

73°

Mostly Cloudy

87%
RAIN
***

0% Thunder
( 44% severe)

SE 9

71%

63°

5 PM

75°

75°

Mostly Cloudy

SSW 8

71%

65°

8 PM

73°

73°

Mostly Cloudy

76%
RAIN
***

0% Thunder
( 41% severe)

S 7

76%

65°

11 PM

68°

68°

Mostly Cloudy

SSE 6

90%

65°

Tuesday
23 JUN 2026

2 AM

67°

67°

Mostly Cloudy

57%
RAIN
>2 in

0% Thunder
( 12% severe)

W 6

93%

65°

Low 62°

5 AM

65°

65°

Mostly Cloudy

NW 7

97%

64°

High 80°

8 AM

67°

67°

Mostly Cloudy

14%
RAIN
.01–.1 in

0% Thunder
( 6% severe)

NNW 8

87%

63°

Mostly Cloudy

11 AM

74°

74°

Partly Cloudy

NNW 9

66%

62°

2 PM

78°

79°

Mostly Cloudy

9%

0% Thunder
( 5% severe)

NNW 10

54%

60°

5 PM

79°

80°

Mostly Cloudy

NNW 12

49%

58°

8 PM

75°

75°

Partly Cloudy

NNW 10

54%

57°


ALLENTOWN, PA extended weather forecast
Wednesday 24 JUN 2026	Thursday 25 JUN 2026	Friday 26 JUN 2026	Saturday 27 JUN 2026	Sunday 28 JUN 2026
Low 58°	Low 59°	Low 63°	Low 65°	Low 63°
High 85°	High 84°	High 83°	High 82°	High 83°

Clear 8% Rain	Mostly Cloudy 28% Rain	Overcast 64% Rain	Overcast 57% Rain	Mostly Cloudy 45% Rain

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