Allentown weather live forecast

Tomorrow's maximum temperature in Allentown is expected to be 14°C.

  • Monday
    17th Mar
    Mostly cloudy with rain (5-10 mm of rainfall expected)
  • Tuesday
    18th Mar
    Clear skies
  • Wednesday
    19th Mar
    Scattered clouds
  • Thursday
    20th Mar
    Mostly cloudy with rain (10-20 mm of rainfall expected)
  • Friday
    21st Mar
    Sunshine and showers (0-2 mm of rainfall expected)

5-day weather forecast updated at 04:01 on Monday 17th March 2025 GMT

More about Allentown

Allentown by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Pennsylvania

Auto Europe: Cheap car hire deals worldwide

  • Compare car hire prices to find lowest rate
  • Free cancellation up to 48 hours before pick up
  • Book car hire for over 20,000 destinations worldwide
Go to Auto Europe deal >>

View all Auto Europe offers

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 17th March 2025

Expect mostly cloudy with rain in Allentown, Pennsylvania with a maximum temperature of 14°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 29% chance of some rain and a moderate breeze of 22 kph from the north-west.

  • 14°C maximum temperature14
    °C maximum temperature
  • 2°C minimum temperature2
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 29% chance of some rain29
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 22 kph from the North-West22
    kph wind from NW

Back to top

Allentown weather for Tuesday 18th March 2025

Expect clear skies in Allentown, Pennsylvania with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the north-west.

  • 17°C maximum temperature17
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Clear skies
    clear skies
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 15 kph from the North-West15
    kph wind from NW

Back to top

Allentown weather for Wednesday 19th March 2025

Expect scattered clouds in Allentown, Pennsylvania with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the south-east.

  • 20°C maximum temperature20
    °C maximum temperature
  • 4°C minimum temperature4
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 18 kph from the South-East18
    kph wind from SE

Back to top

Allentown weather for Thursday 20th March 2025

Expect mostly cloudy with rain in Allentown, Pennsylvania with a maximum temperature of 19°C, maximum UV of 6 (High) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 81% chance of some rain and a moderate breeze of 20 kph from the south-east.

  • 19°C maximum temperature19
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 81% chance of some rain81
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 19°C wind chill19
    °C wind chill
  • Moderate breeze of 20 kph from the South-East20
    kph wind from SE

Back to top

Allentown weather for Friday 21st March 2025

Expect sunshine and showers in Allentown, Pennsylvania with a maximum temperature of 7°C, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0-2 mm of rainfall expected with 6% chance of some rain and a fresh breeze of 34 kph from the north-west.

  • 7°C maximum temperature7
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 12 hours of bright sunshine12
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 6% chance of some rain6
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 3°C wind chill3
    °C wind chill
  • Fresh breeze of 34 kph from the North-West34
    kph wind from NW

Back to top

Cosmos: up to £900 savings on 2026 tours

  • Save up to £900 per couple on 2026 tours worldwide
  • Discount varies by destination. T&Cs apply
  • Travel between 1st Jan & 31st Dec 2026 (inclusive)
Go to Cosmos deal >>

Expires at 23:59 on Tuesday 30th Sep 2025 · View all Cosmos offers

CosmosTour deal finder

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about the USA

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^