Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 18°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Tuesday
12th May
18

6

14

7
Wednesday
13th May
19

11

0

5
Thursday
14th May
17

11

4

5
Friday
15th May
19

10

5

3
Saturday
16th May
26

11

13

3

5-day weather forecast updated at 04:01 on Tuesday 12th 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 12th May 2026

Expect clear skies in Allentown, Pennsylvania with a maximum temperature of 18°C, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-west.

18
°C maximum temperature
6
°C minimum temperature
clear skies
14
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
18
°C wind chill
9
kph wind from NW

Allentown weather for Wednesday 13th May 2026

Expect mostly cloudy with rain in Allentown, Pennsylvania with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 100% chance of some rain and a gentle breeze of 18 kph from the south.

19
°C maximum temperature
11
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
5
UV index (Moderate)
100
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
18
kph wind from S

Allentown weather for Thursday 14th May 2026

Expect mostly cloudy with rain in Allentown, Pennsylvania with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 50% chance of some rain and a gentle breeze of 15 kph from the north-west.

17
°C maximum temperature
11
°C minimum temperature
mostly cloudy with rain
4
hours of sunshine
5
UV index (Moderate)
50
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
15
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 3 (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
3
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 scattered clouds in Allentown, Pennsylvania with a maximum temperature of 26°C, maximum UV of 3 (Moderate) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the west.