Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 4°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Thursday
15th Jan
4

-5

3

1
Friday
16th Jan
0

-6

7

2
Saturday
17th Jan
3

-3

0

0
Sunday
18th Jan
1

-8

1

1
Monday
19th Jan
-1

-11

6

2

5-day weather forecast updated at 04:02 on Thursday 15th January 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 Thursday 15th January 2026

Expect mostly cloudy with light rain in Allentown, Pennsylvania with a maximum temperature of 4°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 8% chance of some rain and a moderate breeze of 23 kph from the west.

4
°C maximum temperature
-5
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
1
UV index (Low)
8
% chance of some rain
<2
mm of rainfall expected
-1
°C wind chill
23
kph wind from W

Allentown weather for Friday 16th January 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 0°C, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 20 kph from the west.

0
°C maximum temperature
-6
°C minimum temperature
broken clouds
7
hours of sunshine
2
UV index (Low)
0
cm of snow expected
-5
°C wind chill
20
kph wind from W

Allentown weather for Saturday 17th January 2026

Expect overcast skies in Allentown, Pennsylvania with a maximum temperature of 3°C and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

3
°C maximum temperature
-3
°C minimum temperature
overcast skies
0
hours of sunshine
0
UV index (None)
0
mm of rainfall expected
0
°C wind chill
11
kph wind from S

Allentown weather for Sunday 18th January 2026

Expect mostly cloudy with snow in Allentown, Pennsylvania with a maximum temperature of 1°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 5-10 cm of snow expected with 27% chance of some snow and a gentle breeze of 13 kph from the west.

1
°C maximum temperature
-8
°C minimum temperature
mostly cloudy with snow
1
hour of sunshine
1
UV index (Low)
27
% chance of some snow
<10
cm of snow expected
-3
°C wind chill
13
kph wind from W

Allentown weather for Monday 19th January 2026

Expect clear skies with flurries of snow in Allentown, Pennsylvania with a maximum temperature of -1°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0-2 cm of snow expected with 25% chance of some snow and a gentle breeze of 19 kph from the west.