Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 20°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Wednesday
13th May
20

12

2

4
Thursday
14th May
17

11

5

6
Friday
15th May
19

10

5

5
Saturday
16th May
26

10

8

8
Sunday
17th May
30

15

9

7

5-day weather forecast updated at 04:01 on Wednesday 13th May 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 13th May 2026

Expect mostly cloudy with light rain in Allentown, Pennsylvania with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 92% chance of some rain and a moderate breeze of 21 kph from the south.

20
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
4
UV index (Moderate)
92
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
21
kph wind from S

Allentown weather for Thursday 14th May 2026

Expect mostly cloudy with light rain in Allentown, Pennsylvania with a maximum temperature of 17°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 17% chance of some rain and a gentle breeze of 16 kph from the north-west.

17
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
5
hours of sunshine
6
UV index (High)
17
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
16
kph wind from NW

Allentown weather for Friday 15th May 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-west.

19
°C maximum temperature
10
°C minimum temperature
broken clouds
5
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
19
°C wind chill
17
kph wind from NW

Allentown weather for Saturday 16th May 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 26°C, maximum UV of 8 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south-west.

26
°C maximum temperature
10
°C minimum temperature
broken clouds
8
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
26
°C wind chill
14
kph wind from SW

Allentown weather for Sunday 17th May 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 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the west.