LEHIGH VALLEY, PA 18003 Weather Forecast & Current Conditions

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18003 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
ALLENTOWN, PA Current Weather
12:51 AM EDT SEP 21, 2026
Overcast 66°F
Feels Like:	66°F
Dewpoint:	63°F
Rel. Hum.:	90%
Visibility:	10 miles
Wind:	NE at 7 mph
Pressure:	29.96 inches
Last 72 hours
Local Area Snow Depth
Pennsylvania Current Weather
Pennsylvania MOS Forecast Weather

Weather Map

(Automated weather data from NWS/FAA)

18003 WEATHER FORECAST
10-Day model forecast maps 2026 Hurricanes	LEHIGH VALLEY, PA 18003 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Mostly cloudy. Showers with a slight chance of thunderstorms this evening. Lows in the upper 50s. North winds 5 to 10 mph. Chance of rain 90 percent.

MONDAY
Partly sunny in the morning, then becoming mostly cloudy. Highs in the upper 60s. Northeast winds 5 to 10 mph.

MONDAY NIGHT
Cloudy. A chance of showers in the evening, then showers after midnight. Lows around 50. Northeast winds 5 to 10 mph. Chance of rain 80 percent.

TUESDAY
Showers likely. Highs in the lower 60s. Northeast winds around 10 mph. Chance of rain 70 percent.

TUESDAY NIGHT
Mostly cloudy. Showers likely in the evening. Lows in the upper 40s. Northeast winds around 10 mph. Chance of rain 60 percent.

WEDNESDAY
Mostly cloudy with a 30 percent chance of showers. Highs in the lower 60s.

WEDNESDAY NIGHT
Mostly cloudy. Lows in the upper 40s.

THURSDAY
Partly sunny. Highs in the lower 60s.

THURSDAY NIGHT
Mostly cloudy. Lows in the upper 40s.

FRIDAY
Partly sunny. Highs in the mid 60s.

FRIDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. A 30 percent chance of showers. Lows in the upper 40s.

SATURDAY
Mostly sunny. Highs in the upper 60s.

SATURDAY NIGHT
Mostly cloudy. Lows in the upper 40s.

18003 WEATHER SATELLITE LOOPS

Visible Weather Satellite
LEHIGH VALLEY, PA 18003

Infrared Weather Satellite
LEHIGH VALLEY, PA 18003

18003 WEATHER RADAR LOOP

NEXRAD Weather Radar
LEHIGH VALLEY, PA 18003

MOS COMPUTER WEATHER FORECAST

ALLENTOWN, PA 3 hourly weather forecast

weather forecast created 5:00 PM PDT 9/20/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Monday
21 SEP 2026

2 AM

64°

64°

Mostly Cloudy

1%

0% Thunder
( 0% severe)

N 7

97%

63°

Low 59°

5 AM

61°

60°

Partly Cloudy

N 8

97%

60°

High 69°

8 AM

60°

59°

Partly Cloudy

1%

0% Thunder
( 0% severe)

NNE 9

96%

59°

Mostly Cloudy

11 AM

66°

66°

Mostly Cloudy

NE 10

68%

55°

2 PM

68°

68°

Mostly Cloudy

16%
RAIN
<.01 in

0% Thunder
( 0% severe)

ENE 9

61%

54°

5 PM

66°

66°

Mostly Cloudy

ENE 9

65%

54°

8 PM

62°

61°

Mostly Cloudy

38%
RAIN
***

0% Thunder
( 4% severe)

ENE 9

72%

53°

11 PM

59°

57°

Mostly Cloudy

ENE 9

87%

55°

Tuesday
22 SEP 2026

2 AM

56°

53°

Mostly Cloudy

56%
RAIN
***

0% Thunder
( 6% severe)

NE 10

96%

55°

Low 50°

5 AM

54°

51°

Mostly Cloudy

NE 12

100%

54°

High 61°

8 AM

54°

51°

Mostly Cloudy

61%
RAIN
***

0% Thunder
( 1% severe)

ENE 12

100%

54°

Mostly Cloudy

Rain Likely

11 AM

57°

54°

Mostly Cloudy

ENE 13

86%

53°

2 PM

60°

58°

Mostly Cloudy

38%
RAIN
.1–.25 in

0% Thunder
( 1% severe)

ENE 13

75%

52°

5 PM

60°

58°

Mostly Cloudy

ENE 14

72%

51°

8 PM

57°

54°

Mostly Cloudy

12%
RAIN
<.01 in

0% Thunder
( 0% severe)

NE 14

75%

49°

11 PM

55°

52°

Mostly Cloudy

NE 12

83%

50°


ALLENTOWN, PA extended weather forecast
Wednesday 23 SEP 2026	Thursday 24 SEP 2026	Friday 25 SEP 2026	Saturday 26 SEP 2026	Sunday 27 SEP 2026
Low 49°	Low 48°	Low 46°	Low 53°	Low 51°
High 66°	High 65°	High 70°	High 70°	High 68°

Overcast 25% Rain	Partly Cloudy 12% Rain	Partly Cloudy 24% Rain	Overcast 29% Rain	Overcast 51% Rain

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