Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 77°F. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Sunday
6th Sep
77

63

9

6
Monday
7th Sep
75

59

11

7
Tuesday
8th Sep
79

57

12

7
Wednesday
9th Sep
82

61

9

6
Thursday
10th Sep
82

66

5

6

5-day weather forecast updated at 04:01 on Sunday 6th September 2026 GMT

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The 5-day weather forecast for Pennsylvania (Allentown) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Allentown weather forecast by day

Below are the detailed weather forecasts for Allentown for the next 5 days.

Allentown weather for Sunday 6th September 2026

Expect sunshine and showers in Allentown, Pennsylvania with a maximum temperature of 77°F, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 15% chance of some rain and a light breeze of 5 mph from the north.

77
°F maximum temperature
63
°F minimum temperature
sunshine and showers
9
hours of sunshine
6
UV index (High)
15
% chance of some rain
<2
mm of rainfall expected
77
°F wind chill
5
mph wind from N

Allentown weather for Monday 7th September 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 75°F, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 mph from the north.

75
°F maximum temperature
59
°F minimum temperature
scattered clouds
11
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
75
°F wind chill
4
mph wind from N

Allentown weather for Tuesday 8th September 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 79°F, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 mph from the west.

79
°F maximum temperature
57
°F minimum temperature
scattered clouds
12
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
79
°F wind chill
4
mph wind from W

Allentown weather for Wednesday 9th September 2026

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a gentle breeze of 10 mph from the south-west.

82
°F maximum temperature
61
°F minimum temperature
isolated thunderstorms
9
hours of sunshine
6
UV index (High)
25
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
10
mph wind from SW

Allentown weather for Thursday 10th September 2026

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 42% chance of some rain and a gentle breeze of 12 mph from the west.