Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 17°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Sunday
27th Sep
17

15

0

1
Monday
28th Sep
18

14

0

2
Tuesday
29th Sep
23

14

3

6
Wednesday
30th Sep
25

14

6

4
Thursday
1st Oct
27

16

8

4

5-day weather forecast updated at 04:01 on Sunday 27th September 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 Sunday 27th September 2026

Expect mostly cloudy with rain in Allentown, Pennsylvania with a maximum temperature of 17°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 95% chance of some rain and a moderate breeze of 22 kph from the north.

17
°C maximum temperature
15
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
1
UV index (Low)
95
% chance of some rain
<20
mm of rainfall expected
17
°C wind chill
22
kph wind from N

Allentown weather for Monday 28th September 2026

Expect overcast with light rain in Allentown, Pennsylvania with a maximum temperature of 18°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 53% chance of some rain and a gentle breeze of 14 kph from the north.

18
°C maximum temperature
14
°C minimum temperature
overcast with light rain
0
hours of sunshine
2
UV index (Low)
53
% chance of some rain
<5
mm of rainfall expected
18
°C wind chill
14
kph wind from N

Allentown weather for Tuesday 29th September 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 23°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north-west.

23
°C maximum temperature
14
°C minimum temperature
broken clouds
3
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
23
°C wind chill
8
kph wind from NW

Allentown weather for Wednesday 30th September 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 25°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south-west.

25
°C maximum temperature
14
°C minimum temperature
broken clouds
6
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
25
°C wind chill
7
kph wind from SW

Allentown weather for Thursday 1st October 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south-west.