Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 26°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Tuesday
25th Aug
26

15

9

4
Wednesday
26th Aug
26

15

8

7
Thursday
27th Aug
25

19

3

5
Friday
28th Aug
27

19

6

5
Saturday
29th Aug
26

16

13

7

5-day weather forecast updated at 04:01 on Tuesday 25th 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 Tuesday 25th August 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 26°C, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the west.

26
°C maximum temperature
15
°C minimum temperature
scattered clouds
9
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
26
°C wind chill
12
kph wind from W

Allentown weather for Wednesday 26th August 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south-west.

26
°C maximum temperature
15
°C minimum temperature
broken clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
7
kph wind from SW

Allentown weather for Thursday 27th August 2026

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 25°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 91% chance of some rain and a light breeze of 12 kph from the south.

25
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
5
UV index (Moderate)
91
% chance of some rain
<30
mm of rainfall expected
25
°C wind chill
12
kph wind from S

Allentown weather for Friday 28th August 2026

Expect sunshine and showers in Allentown, Pennsylvania with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 36% chance of some rain and a light breeze of 8 kph from the north-west.

27
°C maximum temperature
19
°C minimum temperature
sunshine and showers
6
hours of sunshine
5
UV index (Moderate)
36
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
8
kph wind from NW

Allentown weather for Saturday 29th August 2026

Expect clear skies in Allentown, Pennsylvania with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 7 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the north.