Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 19°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Friday
22nd May
19

13

1

UV7
Saturday
23rd May
12

10

0

UV1
Sunday
24th May
17

10

0

UV3
Monday
25th May
22

14

0

UV5
Tuesday
26th May
27

15

3

UV6

5-day weather forecast updated at 04:01 on Friday 22nd 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 Friday 22nd May 2026

Expect overcast skies in Allentown, Pennsylvania with a maximum temperature of 19°C, maximum UV of 7 (High) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the east.

19
°C maximum temperature
13
°C minimum temperature
overcast skies
1
hour of sunshine
UV7
UV index (High)
0
mm of rainfall expected
19
°C wind chill
15
kph wind from E

Allentown weather for Saturday 23rd May 2026

Expect cloudy with some rain in Allentown, Pennsylvania with a maximum temperature of 12°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 100% chance of some rain and a moderate breeze of 20 kph from the east.

12
°C maximum temperature
10
°C minimum temperature
cloudy with some rain
0
hours of sunshine
UV1
UV index (Low)
100
% chance of some rain
<30
mm of rainfall expected
0
no heat & humidity
20
kph wind from E

Allentown weather for Sunday 24th May 2026

Expect cloudy with some rain in Allentown, Pennsylvania with a maximum temperature of 17°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 61% chance of some rain and a gentle breeze of 18 kph from the east.

17
°C maximum temperature
10
°C minimum temperature
cloudy with some rain
0
hours of sunshine
UV3
UV index (Moderate)
61
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
18
kph wind from E

Allentown weather for Monday 25th May 2026

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 22°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 56% chance of some rain and little or no wind of 4 kph from the south-west.

22
°C maximum temperature
14
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
UV5
UV index (Moderate)
56
% chance of some rain
<10
mm of rainfall expected
22
°C wind chill
4
kph wind from SW

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 6 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the south-west.