Allentown, PA

Right Now
75°
Clear
  • Humidity: 64%
  • Feels Like: 75°
  • Heat Index: 75°
  • Wind: 7 mph
  • Wind Chill: 75°
  • UV Index: 10 Very High
  • Sunrise: 05:36:41 AM
  • Sunset: 08:22:13 PM
  • Dew Point: 62°
  • Visibility: 10 mi

Today

Warmer and more humid with plenty of sunshine.

Tonight

Turning cloudy with patchy fog late.

Tomorrow

Low clouds giving way to some sunshine with another warm and humid afternoon.

Next 12 Hours

Time
Temp
Precip
10 PM
72°
10%
10 PM
72°

Wind: S @ 6mph

Precip: 10% Chance

Humidity: 71%

Wind Chill: 72°

Heat Index: 72°

UV Index: 0 Low

Visibility: 9 mi

11 PM
70°
10%
11 PM
70°

Wind: S @ 5mph

Precip: 10% Chance

Humidity: 77%

Wind Chill: 70°

Heat Index: 70°

UV Index: 0 Low

Visibility: 7 mi

12 AM
67°
10%
12 AM
67°

Wind: S @ 4mph

Precip: 10% Chance

Humidity: 87%

Wind Chill: 67°

Heat Index: 67°

UV Index: 0 Low

Visibility: 6 mi

1 AM
66°
10%
1 AM
66°

Wind: S @ 3mph

Precip: 10% Chance

Humidity: 91%

Wind Chill: 66°

Heat Index: 66°

UV Index: 0 Low

Visibility: 5 mi

2 AM
64°
10%
2 AM
64°

Wind: S @ 2mph

Precip: 10% Chance

Humidity: 95%

Wind Chill: 64°

Heat Index: 64°

UV Index: 0 Low

Visibility: 3 mi

3 AM
63°
10%
3 AM
63°

Wind: SSE @ 2mph

Precip: 10% Chance

Humidity: 96%

Wind Chill: 63°

Heat Index: 63°

UV Index: 0 Low

Visibility: 2 mi

4 AM
63°
10%
4 AM
63°

Wind: SSE @ 1mph

Precip: 10% Chance

Humidity: 96%

Wind Chill: 63°

Heat Index: 63°

UV Index: 0 Low

Visibility: 2 mi

5 AM
63°
10%
5 AM
63°

Wind: SSE @ 2mph

Precip: 10% Chance

Humidity: 98%

Wind Chill: 63°

Heat Index: 63°

UV Index: 0 Low

Visibility: 2 mi

6 AM
63°
10%
6 AM
63°

Wind: S @ 2mph

Precip: 10% Chance

Humidity: 97%

Wind Chill: 63°

Heat Index: 63°

UV Index: 0 Low

Visibility: 2 mi

7 AM
63°
20%
7 AM
63°

Wind: SSE @ 2mph

Precip: 20% Chance

Humidity: 95%

Wind Chill: 63°

Heat Index: 63°

UV Index: 0 Low

Visibility: 4 mi

8 AM
64°
20%
8 AM
64°

Wind: SSE @ 1mph

Precip: 20% Chance

Humidity: 91%

Wind Chill: 64°

Heat Index: 64°

UV Index: 1 Low

Visibility: 6 mi

9 AM
66°
10%
9 AM
66°

Wind: SSE @ 2mph

Precip: 10% Chance

Humidity: 87%

Wind Chill: 66°

Heat Index: 67°

UV Index: 2 Low

Visibility: 8 mi

10 Day Forecast for Allentown, PA

Your local forecast from local meteorologists

Local Forecast Discussion

Remaining humid this week with increasing shower and t-storm chances

  • ,
  • Updated
SHORT TERM FORECAST
 

TONIGHT: Turning cloudy with patchy fog late. Low: 61

WEDNESDAY: Low clouds giving way to some sunshine with another warm and humid afternoon. High: 80

WEDNESDAY NIGHT: Becoming cloudy with a shower or two around. Low: 65

 

 
FORECAST SYNOPSIS

An offshore high pressure system has been slowly sliding south from the Canadian Maritimes since this weekend. While it's been keeping us dry, it's also created an onshore flow off the Atlantic Ocean. This has led to low clouds and fog developing overnight and sunshine breaking out as the day progresses, a pattern that will continue again Wednesday. Wednesday night into Thursday, there's something new to watch... An area of low pressure with tropical characteristics that will lift north from the Southeastern United States into the Mid Atlantic. This will present the possibility for a shower over this stretch with perhaps a thunderstorm in spots Thursday. That low will dissolve into an approaching low and cold front by Friday as the offshore low positions itself by Bermuda. The combination will send temperatures soaring, humidity levels to rise, and increase the threat for showers and a thunderstorm. While the cold front's passage may lingering into Saturday morning, along with a shower or thunderstorm, the trend during the first half of the weekend will be toward drying out as high pressure builds in from the Midwest.

DETAILED FORECAST

TONIGHT

As has been the case the past couple nights, the offshore high that leads to lots of afternoon sunshine also causes the clouds to build and fog to develop at night and that will happen again tonight. With higher dew points, we can also expect warmer overnight lows as temperatures stay in the 60s, albeit lower 60s. This means the comfortable nights we've experienced for most of May are a thing of the past for the rest of the work week.

WEDNESDAY

With the offshore low now even farther south the sunshine should break out even faster than the previous two days. However, while the low clouds will be breaking faster the encroaching low to our west will start streaming high clouds into the area by midday. This means that most of the sunshine that we do see on Wednesday may be of the milky variety. While still above normal, daytime highs will take a slight hit on Wednesday as they fall back closer to 80°. Dew points will continue to be the near 60° to middle 60s range, so it'll once again be noticeable.

THURSDAY

Thursday will be a bit "cooler" than Wednesday with highs near 75°, though we should start to notice the humidity even more as the high slides closer to Bermuda and slowly starts to breakdown. This will allow more moisture to creep into the Eastern Seaboard. At the same time, a cold front to our west will continue to inch closer, resulting in even more instability. So, there's a chance for showers and thunderstorms, really at any point in time during the day. There will still be some dry times, though they're met by plenty of clouds.

FRIDAY

Friday will feature our greatest chance for showers and thunderstorms as the aforementioned cold front to our west tracks through. However, it may take a little while to get them. Warm and humid air will be in place out ahead of the front, so expect a classic summer-like day with highs in the mid 80s, some sunshine, and scattered showers and a thunderstorm by the afternoon and evening. In fact, a few storms could be locally strong or even severe.

SATURDAY

The cold front is expected to exit the East Coast early on Saturday, so while there may be a leftover shower or thunderstorm early the trend of the day will be drying out. We'll also see dew points fall off as sunshine returns and temperatures top out in the low 80s.

LINKS:  HOUR BY  HOUR  |  RADAR | TRAFFIC

Allentown, PA

Right Now
75°
Clear
  • Humidity: 64%
  • Feels Like: 75°
  • Heat Index: 75°
  • Wind: 7 mph
  • Wind Chill: 75°
  • UV Index: 10 Very High
  • Sunrise: 05:36:41 AM
  • Sunset: 08:22:13 PM
  • Dew Point: 62°
  • Visibility: 10 mi

Today

Warmer and more humid with plenty of sunshine.

Tonight

Turning cloudy with patchy fog late.

Tomorrow

Low clouds giving way to some sunshine with another warm and humid afternoon.

Day
Temp
Tue
61°
83°
Tue
83°/61°
Mostly clear

Chance of Rain: 0%

Sunrise: 05:36:41 AM

Sunset: 08:22:13 PM

Humidity: 65%

Wind: SSE @ 6mph

UV Index: 10 Very High

Tuesday Night

Turning cloudy with patchy fog late.

Wed
65°
80°
Wed
80°/65°
Mostly cloudy

Chance of Rain: 0%

Sunrise: 05:36:05 AM

Sunset: 08:23:02 PM

Humidity: 60%

Wind: SE @ 8mph

UV Index: 4 Moderate

Wednesday Night

Becoming cloudy; a shower or two around.

Thu
67°
75°
Thu
75°/67°
Rain and thunder

Chance of Rain: 40%

Sunrise: 05:35:32 AM

Sunset: 08:23:50 PM

Humidity: 64%

Wind: SSE @ 10mph

UV Index: 3 Moderate

Thursday Night

Warm; rain and drizzle in the evening followed by occasional rain and a thunderstorm late

Fri
67°
85°
Fri
85°/67°
Thunderstorms

Chance of Rain: 60%

Sunrise: 05:35:01 AM

Sunset: 08:24:37 PM

Humidity: 64%

Wind: SSW @ 12mph

UV Index: 3 Moderate

Friday Night

Mostly cloudy, warm and humid with a couple of showers and a thunderstorm

Sat
53°
79°
Sat
79°/53°
Showers possible

Chance of Rain: 40%

Sunrise: 05:34:31 AM

Sunset: 08:25:23 PM

Humidity: 60%

Wind: NW @ 10mph

UV Index: 7 High

Saturday Night

Partly cloudy and cooler

Sun
47°
73°
Sun
73°/47°
Mix of sun and clouds

Chance of Rain: 0%

Sunrise: 05:34:03 AM

Sunset: 08:26:07 PM

Humidity: 49%

Wind: NNW @ 10mph

UV Index: 10 Very High

Sunday Night

Clear

Mon
48°
71°
Mon
71°/48°
More sun than clouds

Chance of Rain: 0%

Sunrise: 05:33:37 AM

Sunset: 08:26:51 PM

Humidity: 49%

Wind: N @ 10mph

UV Index: 10 Very High

Monday Night

Partly cloudy




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