Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 39°F. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Sunday
21st Dec
39

25

7

1
Monday
22nd Dec
37

25

7

1
Tuesday
23rd Dec
37

30

0

0
Wednesday
24th Dec
43

30

6

2
Thursday
25th Dec
41

30

1

0

5-day weather forecast updated at 04:01 on Sunday 21st December 2025 GMT

More about Allentown

Allentown by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Pennsylvania

Travelbag: up to 50% off 2026 holidays

Sale

Save up to 50% on 2026 holidays & tours with Travelbag
Book selected stays in popular destinations around the world
Travel between 1st Jan & 31st Dec 2026 (inclusive)

Go to Travelbag deal >>

Expires at 23:59 on Saturday 31st Jan 2026 · View all Travelbag offers

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 21st December 2025

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 39°F, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 15 mph from the north-west.

39
°F maximum temperature
25
°F minimum temperature
scattered clouds
7
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
32
°F wind chill
15
mph wind from NW

Allentown weather for Monday 22nd December 2025

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 37°F, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the west.

37
°F maximum temperature
25
°F minimum temperature
scattered clouds
7
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
30
°F wind chill
8
mph wind from W

Allentown weather for Tuesday 23rd December 2025

Expect cloudy with sleet or snow in Allentown, Pennsylvania with a maximum temperature of 37°F and no hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 40% chance of some sleet or snow and a gentle breeze of 11 mph from the west.

37
°F maximum temperature
30
°F minimum temperature
cloudy with sleet or snow
0
hours of sunshine
0
UV index (None)
40
% chance of some sleet or snow
<5
mm of sleet/snow expected
32
°F wind chill
11
mph wind from W

Allentown weather for Wednesday 24th December 2025

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 43°F, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 13 mph from the north-west.

43
°F maximum temperature
30
°F minimum temperature
broken clouds
6
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
36
°F wind chill
13
mph wind from NW

Allentown weather for Thursday 25th December 2025

Expect mostly cloudy with light rain in Allentown, Pennsylvania with a maximum temperature of 41°F and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 50% chance of some rain and a light breeze of 5 mph from the south-west.