Allentown weather live forecast

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

Monday
15th Dec
27

18

6

2
Tuesday
16th Dec
28

16

7

2
Wednesday
17th Dec
39

23

1

2
Thursday
18th Dec
46

23

3

2
Friday
19th Dec
50

27

4

1

5-day weather forecast updated at 04:01 on Tuesday 16th December 2025 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 15th December 2025

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 27°F, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 12 mph from the west.

27
°F maximum temperature
18
°F minimum temperature
scattered clouds
6
hours of sunshine
2
UV index (Low)
0
cm of snow expected
16
°F wind chill
12
mph wind from W

Allentown weather for Tuesday 16th December 2025

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 28°F, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0 cm of snow expected and a light breeze of 5 mph from the south-west.

28
°F maximum temperature
16
°F minimum temperature
scattered clouds
7
hours of sunshine
2
UV index (Low)
0
cm of snow expected
25
°F wind chill
5
mph wind from SW

Allentown weather for Wednesday 17th December 2025

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 39°F, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the south-west.

39
°F maximum temperature
23
°F minimum temperature
broken clouds
1
hour of sunshine
2
UV index (Low)
0
mm of rainfall expected
34
°F wind chill
9
mph wind from SW

Allentown weather for Thursday 18th December 2025

Expect mostly cloudy with light rain in Allentown, Pennsylvania with a maximum temperature of 46°F, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 89% chance of some rain and a moderate breeze of 14 mph from the south-east.

46
°F maximum temperature
23
°F minimum temperature
mostly cloudy with light rain
3
hours of sunshine
2
UV index (Low)
89
% chance of some rain
<2
mm of rainfall expected
41
°F wind chill
14
mph wind from SE

Allentown weather for Friday 19th December 2025

Expect sunshine and showers in Allentown, Pennsylvania with a maximum temperature of 50°F, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 20-30 mm of rainfall expected with 48% chance of some rain and a moderate breeze of 17 mph from the west.