Allentown weather live forecast

Tomorrow's maximum temperature in Allentown is expected to be 81°F.

5-day weather forecast updated at 04:01 on Wednesday 18th 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 Wednesday 18th June 2025

Expect mostly cloudy with rain in Allentown, Pennsylvania with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 78% chance of some rain and a light breeze of 6 mph from the south-west.

  • 81°F maximum temperature81
    °F maximum temperature
  • 68°F minimum temperature68
    °F minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 78% chance of some rain78
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 6 mph from the South-West6
    mph 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 82°F, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 10-20 mm of rainfall expected with 69% chance of some rain and a moderate breeze of 12 mph from the south-west.

  • 82°F maximum temperature82
    °F maximum temperature
  • 68°F minimum temperature68
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 9 (Very High)9
    UV index (Very High)
  • 69% chance of some rain69
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Moderate breeze of 12 mph from the South-West12
    mph wind from SW

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Allentown weather for Friday 20th June 2025

Expect sunshine and showers in Allentown, Pennsylvania with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0-2 mm of rainfall expected with 6% chance of some rain and a gentle breeze of 9 mph from the north-west.

  • 82°F maximum temperature82
    °F maximum temperature
  • 63°F minimum temperature63
    °F minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 6% chance of some rain6
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 9 mph from the North-West9
    mph wind from NW

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Allentown weather for Saturday 21st June 2025

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the south-west.

  • 86°F maximum temperature86
    °F maximum temperature
  • 64°F minimum temperature64
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Light breeze of 7 mph from the South-West7
    mph wind from SW

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Allentown weather for Sunday 22nd June 2025

Expect broken clouds in Allentown, Pennsylvania with a maximum temperature of 91°F, high levels of heat & humidity, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the west.

  • 91°F maximum temperature91
    °F maximum temperature
  • 68°F minimum temperature68
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • High heat & humidityH
    high heat & humidity
  • Gentle breeze of 9 mph from the West9
    mph wind from W

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

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