Allentown weather live forecast

Tomorrow's maximum temperature in Allentown is expected to be 20°C.

5-day weather forecast updated at 04:01 on Monday 16th June 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 Monday 16th June 2025

Expect overcast skies in Allentown, Pennsylvania with a maximum temperature of 20°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the east.

  • 20°C maximum temperature20
    °C maximum temperature
  • 15°C minimum temperature15
    °C minimum temperature
  • Overcast skies
    overcast skies
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 9 kph from the East9
    kph wind from E

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Allentown weather for Tuesday 17th June 2025

Expect mostly cloudy with light rain in Allentown, Pennsylvania with a maximum temperature of 23°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 70% chance of some rain and a light breeze of 10 kph from the south-east.

  • 23°C maximum temperature23
    °C maximum temperature
  • 16°C minimum temperature16
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 70% chance of some rain70
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 23°C wind chill23
    °C wind chill
  • Light breeze of 10 kph from the South-East10
    kph wind from SE

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Allentown weather for Wednesday 18th June 2025

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 54% chance of some rain and a light breeze of 11 kph from the south-west.

  • 29°C maximum temperature29
    °C maximum temperature
  • 19°C minimum temperature19
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 54% chance of some rain54
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Light breeze of 11 kph from the South-West11
    kph wind from SW

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Allentown weather for Thursday 19th June 2025

Expect isolated thunderstorms in Allentown, Pennsylvania with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 8 hours of bright sunshine. There are 10-20 mm of rainfall expected with 82% chance of some rain and a moderate breeze of 20 kph from the west.

  • 30°C maximum temperature30
    °C maximum temperature
  • 19°C minimum temperature19
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 9 (Very High)9
    UV index (Very High)
  • 82% chance of some rain82
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Moderate breeze of 20 kph from the West20
    kph wind from W

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Allentown weather for Friday 20th June 2025

Expect clear skies in Allentown, Pennsylvania with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the west.

  • 28°C maximum temperature28
    °C maximum temperature
  • 17°C minimum temperature17
    °C minimum temperature
  • Clear skies
    clear skies
  • 15 hours of bright sunshine15
    hours of sunshine
  • UV (maximum) index 9 (Very High)9
    UV index (Very High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 17 kph from the West17
    kph wind from W

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  • Destinations across Europe, Americas, Asia, Africa & beyond
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Metric (°C / mm)  |  Imperial (°F / inches)

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