Currently

Precipitation

Dewpoints

Feels Like

Humidity

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Watches and Warnings

10 Day Forecast for Allentown, PA

Your local forecast from local meteorologists

Local Forecast Discussion

Hot, humid and stormy Monday, but much cooler and refreshing days ahead

  • Updated
SHORT TERM FORECAST
 

MONDAY: Hot and still humid with times of clouds and sun; a late-day shower or t-storm possible. High: 90

MONDAY NIGHT: A drenching or gusty t-storm in the evening; otherwise, mostly cloudy and humid. Low: 68

TUESDAY: Mostly cloudy and much cooler with a few showers or t-storm. High: 71, Low: 50

  

 
FORECAST SUMMARY

Summer officially began Sunday night at 11:32 PM EDT and today will be the first full day of summer, and it will certainly feel like it with temperatures reaching the 90s and high humidity levels.

A more vigorous cold front is expected to slide through the area Monday evening into Tuesday bringing with it widely scattered showers and t-storms. A few storms may be on the strong side, mainly later this evening.

Also, it appears more and more likely that Tropical Depression Claudette will track well to our south, sliding off the North Carolina coast and then heading northeastward over the open Atlantic throughout the day. Claudette may actually re-strengthen to a tropical storm as it re-emerges back out over open water but regardless, we won’t see any direct impacts from the storm, however those with beach interests along the Mid-Atlantic and Northeast coasts will want to be weary of rough surf and rip currents the next couple days.

On Tuesday, we can say good-bye, for now, to the summery temperatures as highs fall back into the 70s and humidity also takes a tumble. We'll get spoiled again later this week with a pretty nice and refreshing stretch of weather!

DETAILED FORECAST

MONDAY

In advance of a cold front, a south to southwesterly wind flow will make for a hot and humid day with a mix of clouds and sun and afternoon highs approaching 90 degrees.

While much of Monday should be dry, late in the day, a few storms created by the aforementioned cold front may start to work into areas west of the Lehigh Valley. As we get closer to sunset then, and heading through Monday evening, the rest of the area will likely have a better chance to see a shower or t-storm as our cold front moves closer.

Some of these storms will have the potential to become severe with damaging winds and large hail the main concerns. Right now, the Storm Prediction Center has much of the region highlighted under a “marginal” or "slight" risk for severe weather. Stay alert!

TUESDAY

Our cold front will slowly cross the region Tuesday leading to a mostly cloudy and much cooler day along with the continued opportunity for showers or a thunderstorm. Dew points and humidity levels are expected to drop big time Tuesday, so don’t expect a severe threat for the day.

High temperatures however will return to the low and mid 70s Tuesday which will be quite the difference compared to Monday. Late in the day Tuesday, we might see drier times with a little clearing as our cold front moves offshore.

MIDDLE TO LATE WEEK

After the passage of the cold front Tuesday, we'll welcome back refreshing air and low humidity midweek. The dry and pleasant weather we enjoyed most of last week will return for another visit as the jet stream takes a dive to our south while surface high pressure originating from Canada and the Great Lakes builds overhead.

The result will be partly to mostly sunny skies from Wednesday through Friday. Highs Wednesday should be in the mid to upper 70s, then the numbers return closer to seasonable levels around 80 degrees Thursday and Friday.

Nighttime lows are also expected to return to some comfy cool levels during this period well down into the 50s.

NEXT WEEKEND

The first weekend of summer looks to be a classic one. Temperatures in the afternoon should be in the low to mid 80s, it'll feel a bit humid out, and there's a chance for a few pop-up storms.

Forecast models show a developing low pressure system and cold front passing through, but the confidence on timing and impacts is low as we're still several days out. Right now, it doesn't look like a washout and we'll fine tune the forecast in the days ahead. Stay tuned!

TRACK THE WEATHER:

LINKS:  HOUR BY  HOUR  |  RADAR | TRAFFIC

Currently

Precipitation

Dewpoints

Feels Like

Humidity

Winds

Watches and Warnings

Allentown, PA

Right Now
81°
Cloudy
  • Humidity: 74%
  • Feels Like: 87°
  • Heat Index: 87°
  • Wind: 10 mph
  • Wind Chill: 81°
  • UV Index: 7 High
  • Sunrise: 05:31:33 AM
  • Sunset: 08:35:56 PM
  • Dew Point: 72°
  • Visibility: 10 mi

Today

Hot and steamy with sunshine and some clouds; a slight chance of a t-storm towards evening to the west.

Tonight

A drenching t-storm in the evening; otherwise, mostly cloudy and humid.

Tomorrow

Mostly cloudy, much cooler, and turning less humid with a couple of showers and a t-storm.

Day
Temp
Mon
68°
90°
Mon
90°/68°
Afternoon showers and thunderstorms. Highs in the upper 80s and lows in the upper 60s.

Chance of Rain: 30%

Sunrise: 05:31:33 AM

Sunset: 08:35:56 PM

Humidity: 65%

Wind: SSW @ 12mph

UV Index: 7 High

Monday Night

A drenching t-storm in the evening; otherwise, mostly cloudy and humid.

Tue
50°
71°
Tue
71°/50°
Cloudy with rain. Highs in the upper 60s and lows in the upper 40s.

Chance of Rain: 60%

Sunrise: 05:31:47 AM

Sunset: 08:36:07 PM

Humidity: 75%

Wind: NW @ 8mph

UV Index: 4 Moderate

Tuesday Night

Stray shower early, then becoming mostly clear.

Wed
53°
74°
Wed
74°/53°
More sun than clouds. Highs in the mid 70s and lows in the low 50s.

Chance of Rain: 0%

Sunrise: 05:32:03 AM

Sunset: 08:36:15 PM

Humidity: 44%

Wind: NW @ 6mph

UV Index: 9 Very High

Wednesday Night

Mostly clear, cool, and comfortable.

Thu
56°
80°
Thu
80°/56°
Plenty of sun. Highs in the upper 70s and lows in the mid 50s.

Chance of Rain: 0%

Sunrise: 05:32:21 AM

Sunset: 08:36:22 PM

Humidity: 48%

Wind: SE @ 8mph

UV Index: 9 Very High

Thursday Night

Mainly clear skies.

Fri
65°
80°
Fri
80°/65°
Partly cloudy. Highs in the low 80s and lows in the mid 60s.

Chance of Rain: 20%

Sunrise: 05:32:41 AM

Sunset: 08:36:26 PM

Humidity: 62%

Wind: SE @ 8mph

UV Index: 9 Very High

Friday Night

Partly cloudy; there might be a passing shower late.

Sat
69°
83°
Sat
83°/69°
Few showers. Highs in the mid 80s and lows in the upper 60s.

Chance of Rain: 30%

Sunrise: 05:33:02 AM

Sunset: 08:36:29 PM

Humidity: 72%

Wind: S @ 11mph

UV Index: 7 High

Saturday Night

Showers in the evening with isolated t-storms arriving overnight.

Sun
64°
81°
Sun
81°/64°
Scattered thunderstorms possible. Highs in the low 80s and lows in the upper 60s.

Chance of Rain: 30%

Sunrise: 05:33:26 AM

Sunset: 08:36:30 PM

Humidity: 75%

Wind: SSW @ 12mph

UV Index: 7 High

Sunday Night

Mostly cloudy with a shower or t-storm possible.

Interactive Radars

Accuweather
Right Now
81°
Cloudy
  • Humidity: 74%
  • Cloud Coverage:72%
  • Wind: 10 mph
  • UV Index: 7 High
  • Sunrise: 05:31:33 AM
  • Sunset: 08:35:56 PM

Today

Hot and steamy with sunshine and some clouds; a slight chance of a t-storm towards evening to the west.

Tonight

A drenching t-storm in the evening; otherwise, mostly cloudy and humid.

Tomorrow

Mostly cloudy, much cooler, and turning less humid with a couple of showers and a t-storm.

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