Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 27°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Thursday
30th Jul
27

18

6

7
Friday
31st Jul
29

18

9

7
Saturday
1st Aug
30

18

7

7
Sunday
2nd Aug
27

20

2

4
Monday
3rd Aug
27

21

0

7

5-day weather forecast updated at 04:01 on Thursday 30th July 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 Thursday 30th July 2026

Expect sunshine and showers in Allentown, Pennsylvania with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 31% chance of some rain and a gentle breeze of 15 kph from the north.

27
°C maximum temperature
18
°C minimum temperature
sunshine and showers
6
hours of sunshine
7
UV index (High)
31
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
15
kph wind from N

Allentown weather for Friday 31st July 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north-west.

29
°C maximum temperature
18
°C minimum temperature
scattered clouds
9
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
6
kph wind from NW

Allentown weather for Saturday 1st August 2026

Expect sunshine and showers in Allentown, Pennsylvania with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a light breeze of 10 kph from the south.

30
°C maximum temperature
18
°C minimum temperature
sunshine and showers
7
hours of sunshine
7
UV index (High)
25
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
10
kph wind from S

Allentown weather for Sunday 2nd August 2026

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 69% chance of some rain and a gentle breeze of 14 kph from the south.

27
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
4
UV index (Moderate)
69
% chance of some rain
<10
mm of rainfall expected
L
low heat & humidity
14
kph wind from S

Allentown weather for Monday 3rd August 2026

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 58% chance of some rain and a light breeze of 7 kph from the north.