Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 79°F. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Sunday
23rd Aug
79

63

7

7
Monday
24th Aug
73

57

6

6
Tuesday
25th Aug
79

57

6

6
Wednesday
26th Aug
82

57

8

6
Thursday
27th Aug
81

63

6

7

5-day weather forecast updated at 04:01 on Sunday 23rd August 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 23rd August 2026

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 79°F, low levels of heat & humidity, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 5-10 mm of rainfall expected with 54% chance of some rain and a gentle breeze of 9 mph from the west.

79
°F maximum temperature
63
°F minimum temperature
isolated thunderstorms
7
hours of sunshine
7
UV index (High)
54
% chance of some rain
<10
mm of rainfall expected
L
low heat & humidity
9
mph wind from W

Allentown weather for Monday 24th August 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 73°F, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the west.

73
°F maximum temperature
57
°F minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
9
mph wind from W

Allentown weather for Tuesday 25th August 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 79°F, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the west.

79
°F maximum temperature
57
°F minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
79
°F wind chill
8
mph wind from W

Allentown weather for Wednesday 26th August 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the west.

82
°F maximum temperature
57
°F minimum temperature
broken clouds
8
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
4
mph wind from W

Allentown weather for Thursday 27th August 2026

Expect sunshine and showers in Allentown, Pennsylvania with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 58% chance of some rain and a light breeze of 7 mph from the south.