Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 31°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Wednesday
15th Apr
31

18

8

7
Thursday
16th Apr
30

20

8

7
Friday
17th Apr
27

18

8

5
Saturday
18th Apr
26

15

10

6
Sunday
19th Apr
21

11

1

3

5-day weather forecast updated at 04:01 on Wednesday 15th April 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 Wednesday 15th April 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south-west.

31
°C maximum temperature
18
°C minimum temperature
scattered clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
17
kph wind from SW

Allentown weather for Thursday 16th April 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south-west.

30
°C maximum temperature
20
°C minimum temperature
broken clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
15
kph wind from SW

Allentown weather for Friday 17th April 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the west.

27
°C maximum temperature
18
°C minimum temperature
broken clouds
8
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
13
kph wind from W

Allentown weather for Saturday 18th April 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.

26
°C maximum temperature
15
°C minimum temperature
scattered clouds
10
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
12
kph wind from SE

Allentown weather for Sunday 19th April 2026

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 21°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 71% chance of some rain and a gentle breeze of 15 kph from the west.