Allentown weather live forecast

Today's maximum temperature in Allentown is expected to be 19°C. Select a day from the live weather forecast for Allentown, Pennsylvania, USA for more weather parameters.

Monday
16th Mar
19

6

1

1
Tuesday
17th Mar
4

-2

5

3
Wednesday
18th Mar
4

-4

3

3
Thursday
19th Mar
8

-1

3

3
Friday
20th Mar
14

3

5

4

5-day weather forecast updated at 04:01 on Monday 16th 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 16th March 2026

Expect mostly cloudy with rain in Allentown, Pennsylvania with a maximum temperature of 19°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 20-30 mm of rainfall expected with 99% chance of some rain and a fresh breeze of 29 kph from the south.

19
°C maximum temperature
6
°C minimum temperature
mostly cloudy with rain
1
hour of sunshine
1
UV index (Low)
99
% chance of some rain
<30
mm of rainfall expected
19
°C wind chill
29
kph wind from S

Allentown weather for Tuesday 17th March 2026

Expect cloudy with sleet or snow in Allentown, Pennsylvania with a maximum temperature of 4°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 10% chance of some sleet or snow and a moderate breeze of 25 kph from the west.

4
°C maximum temperature
-2
°C minimum temperature
cloudy with sleet or snow
5
hours of sunshine
3
UV index (Moderate)
10
% chance of some sleet or snow
<5
mm of sleet/snow expected
-1
°C wind chill
25
kph wind from W

Allentown weather for Wednesday 18th March 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 4°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

4
°C maximum temperature
-4
°C minimum temperature
broken clouds
3
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
1
°C wind chill
11
kph wind from S

Allentown weather for Thursday 19th March 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 8°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

8
°C maximum temperature
-1
°C minimum temperature
broken clouds
3
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
6
°C wind chill
11
kph wind from S

Allentown weather for Friday 20th March 2026

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 14°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the west.