Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 25°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Friday
17th Apr
25

18

8

6
Saturday
18th Apr
24

14

3

6
Sunday
19th Apr
14

5

6

4
Monday
20th Apr
9

2

9

5
Tuesday
21st Apr
13

-1

13

7

5-day weather forecast updated at 04:07 on Friday 17th 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 Friday 17th April 2026

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 25°C, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 17% chance of some rain and a gentle breeze of 13 kph from the north.

25
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
8
hours of sunshine
6
UV index (High)
17
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
13
kph wind from N

Allentown weather for Saturday 18th April 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 24°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south-east.

24
°C maximum temperature
14
°C minimum temperature
broken clouds
3
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
16
kph wind from SE

Allentown weather for Sunday 19th April 2026

Expect sunshine and showers in Allentown, Pennsylvania with a maximum temperature of 14°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 84% chance of some rain and a moderate breeze of 20 kph from the north-west.

14
°C maximum temperature
5
°C minimum temperature
sunshine and showers
6
hours of sunshine
4
UV index (Moderate)
84
% chance of some rain
<10
mm of rainfall expected
14
°C wind chill
20
kph wind from NW

Allentown weather for Monday 20th April 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 9°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the north-west.

9
°C maximum temperature
2
°C minimum temperature
scattered clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
7
°C wind chill
19
kph wind from NW

Allentown weather for Tuesday 21st April 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 13°C, maximum UV of 7 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-west.