Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 27°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Tuesday
26th May
27

14

6

UV7
Wednesday
27th May
27

17

7

UV7
Thursday
28th May
23

15

4

UV5
Friday
29th May
22

13

9

UV7
Saturday
30th May
18

10

4

UV8

5-day weather forecast updated at 04:01 on Tuesday 26th 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 Tuesday 26th May 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the south-west.

27
°C maximum temperature
14
°C minimum temperature
broken clouds
6
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
5
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 7 (High) and 7 hours 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
7
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
11
kph wind from W

Allentown weather for Thursday 28th May 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the north-west.

23
°C maximum temperature
15
°C minimum temperature
broken clouds
4
hours of sunshine
UV5
UV index (Moderate)
0
mm of rainfall expected
23
°C wind chill
19
kph wind from NW

Allentown weather for Friday 29th May 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 22°C, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the north-west.

22
°C maximum temperature
13
°C minimum temperature
scattered clouds
9
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
18
kph wind from NW

Allentown weather for Saturday 30th May 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 18°C, maximum UV of 8 (Very High) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north.