Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 24°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Monday
25th May
24

13

3

UV5
Tuesday
26th May
26

13

9

UV8
Wednesday
27th May
27

17

1

UV3
Thursday
28th May
25

14

11

UV7
Friday
29th May
23

12

14

UV7

5-day weather forecast updated at 04:01 on Monday 25th 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 Monday 25th May 2026

Expect mostly cloudy with light rain in Allentown, Pennsylvania with a maximum temperature of 24°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 70% chance of some rain and little or no wind of 6 kph from the west.

24
°C maximum temperature
13
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
UV5
UV index (Moderate)
70
% chance of some rain
<5
mm of rainfall expected
24
°C wind chill
6
kph wind from W

Allentown weather for Tuesday 26th May 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 26°C, maximum UV of 8 (Very High) and 9 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
13
°C minimum temperature
broken clouds
9
hours of sunshine
UV8
UV index (Very High)
0
mm of rainfall expected
26
°C wind chill
7
kph wind from SW

Allentown weather for Wednesday 27th May 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the west.

27
°C maximum temperature
17
°C minimum temperature
broken clouds
1
hour of sunshine
UV3
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
11
kph wind from W

Allentown weather for Thursday 28th May 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 25°C, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the north.

25
°C maximum temperature
14
°C minimum temperature
scattered clouds
11
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
25
°C wind chill
21
kph wind from N

Allentown weather for Friday 29th May 2026

Expect clear skies in Allentown, Pennsylvania with a maximum temperature of 23°C, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-west.