Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 13°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Friday
19th Dec
13

-3

2

1
Saturday
20th Dec
1

-3

5

2
Sunday
21st Dec
5

-4

7

1
Monday
22nd Dec
1

-5

4

1
Tuesday
23rd Dec
2

-3

0

1

5-day weather forecast updated at 04:02 on Friday 19th 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 Friday 19th December 2025

Expect mostly cloudy with rain in Allentown, Pennsylvania with a maximum temperature of 13°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 79% chance of some rain and a fresh breeze of 31 kph from the west.

13
°C maximum temperature
-3
°C minimum temperature
mostly cloudy with rain
2
hours of sunshine
1
UV index (Low)
79
% chance of some rain
<20
mm of rainfall expected
13
°C wind chill
31
kph wind from W

Allentown weather for Saturday 20th December 2025

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 1°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the west.

1
°C maximum temperature
-3
°C minimum temperature
broken clouds
5
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
-4
°C wind chill
23
kph wind from W

Allentown weather for Sunday 21st December 2025

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 5°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the west.

5
°C maximum temperature
-4
°C minimum temperature
scattered clouds
7
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
1
°C wind chill
24
kph wind from W

Allentown weather for Monday 22nd December 2025

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 1°C, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

1
°C maximum temperature
-5
°C minimum temperature
broken clouds
4
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
-4
°C wind chill
16
kph wind from NW

Allentown weather for Tuesday 23rd December 2025

Expect overcast skies in Allentown, Pennsylvania with a maximum temperature of 2°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-west.