Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 54°F. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Monday
23rd Mar
54

34

4

5
Tuesday
24th Mar
46

34

10

5
Wednesday
25th Mar
55

36

1

4
Thursday
26th Mar
64

45

4

6
Friday
27th Mar
59

32

4

5

5-day weather forecast updated at 04:01 on Monday 23rd March 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 Monday 23rd March 2026

Expect mostly cloudy with rain in Allentown, Pennsylvania with a maximum temperature of 54°F, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 33% chance of some rain and a moderate breeze of 13 mph from the north-west.

54
°F maximum temperature
34
°F minimum temperature
mostly cloudy with rain
4
hours of sunshine
5
UV index (Moderate)
33
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
13
mph wind from NW

Allentown weather for Tuesday 24th March 2026

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 46°F, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the north-west.

46
°F maximum temperature
34
°F minimum temperature
scattered clouds
10
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
43
°F wind chill
7
mph wind from NW

Allentown weather for Wednesday 25th March 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 55°F, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the south.

55
°F maximum temperature
36
°F minimum temperature
broken clouds
1
hour of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
55
°F wind chill
9
mph wind from S

Allentown weather for Thursday 26th March 2026

Expect mostly cloudy with light rain in Allentown, Pennsylvania with a maximum temperature of 64°F, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 28% chance of some rain and a gentle breeze of 9 mph from the south-west.

64
°F maximum temperature
45
°F minimum temperature
mostly cloudy with light rain
4
hours of sunshine
6
UV index (High)
28
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
9
mph wind from SW

Allentown weather for Friday 27th March 2026

Expect mostly cloudy with light rain in Allentown, Pennsylvania with a maximum temperature of 59°F, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 48% chance of some rain and a gentle breeze of 11 mph from the north-west.